import sys, os, time, subprocess, threading, psutil, socket, requests, platform, base64, json, ipaddress
import csv, io, winsound, tempfile, ffmpeg, pyexpat, shutil, ast, operator, re, msvcrt, atexit
from queue import Queue, Empty
from PyQt5.QtWidgets import (QApplication, QWidget, QVBoxLayout, QLineEdit, QLabel,
                             QTabWidget, QPushButton, QMessageBox, QTableWidget, QTableWidgetItem,
                             QFormLayout, QCheckBox, QTextEdit, QComboBox, QInputDialog, QHBoxLayout,
                             QAbstractItemView, QHeaderView, QDialog, QTableView, QStatusBar,
                             QDateEdit, QFileDialog, QMenu, QAction, QStyledItemDelegate, QStackedWidget,
                             QColorDialog, QSizePolicy)
from PyQt5.QtCore import QTimer, Qt, QByteArray, QThread, pyqtSignal, QObject, QDate, QTime, QRect, QLocale
from PyQt5 import QtGui
from PyQt5.QtGui import QIcon, QPixmap, QClipboard, QColor, QBrush, QFont, QIntValidator, QPainter
from io import BytesIO
from datetime import datetime, timedelta
from filelock import FileLock, Timeout
from playsound import playsound
from threading import Thread, Lock
import pygame, fnmatch
import urllib.parse
import urllib.request
from collections import deque
from concurrent.futures import ThreadPoolExecutor, as_completed

ALERT_TIME = 60        # seconds
ALERT_REPEAT = 300      # seconds
ALERT_TIMEOUT = 5      # seconds
OFFLINE_DURATION = 60    # seconds
MAX_WORKERS = 10         # Maximum number of threads
MAX_PINGS = 50           # Maximum number of concurrent pings
GROUP_SIZE = 30         # Make groups of hostname
LOG_NORMAL = 60         # Write host retrun online after 60 seconds
FONT_SIZE = 14
english_locale = QLocale(QLocale.English, QLocale.UnitedStates)

class UpdateLogWidget(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        layout = QVBoxLayout(self)
        
        # Create a QTextEdit for displaying the update log
        self.text_edit = QTextEdit(self)
        self.text_edit.setReadOnly(True)  # Make it read-only
        self.text_edit.setPlainText(
            """Update Log

v49.6
    - fixed กำหนดให้เปิดโปรแกรมได้ 1 instance
v49.5 
    - เล่นเสียงเมื่อ host offine หรือ online จำกัดจำนวน 10 คิว
    - บันทึก history_online by date และ backup temp file 
    - support thai font, export csv
    - backup offline_state.json ทุกครั้งที่มีการเปิดโปรแกรม
    - กำหนดให้เปิดโปรแกรมได้ 1 instance
v49.4 
    - สามารถ input ได้เช่น 60*2 เพื่อคำนวณเวลาได้ง่าย
v49.3 
    - highligh host ที่ offline time มากกว่าที่กำหนดและเลือกสี
v49   
    - การอ่าน return_online log คอมพิวเตอร์ที่ตั้งค่ารูปแบบวันที่ที่ต่างกัน
    - save offline state ป้องกันการ damage จากการเขียนไฟล์หรือโปรแกรมขัดข้องด้วยการสร้าง temp"""
        )
        
        # Adjust fonts if necessary
        font = QFont()
        font.setPointSize(11)
        self.text_edit.setFont(font)

        layout.addWidget(self.text_edit)
        self.setLayout(layout)

class ExpressionEvaluator(ast.NodeVisitor):
    allowed_nodes = (ast.Expression, ast.BinOp, ast.UnaryOp,
                     ast.Add, ast.Sub, ast.Mult, ast.Div, ast.FloorDiv,
                     ast.Pow, ast.USub, ast.UAdd, ast.Constant,)

    def visit(self, node):
        if not isinstance(node, self.allowed_nodes):
            raise ValueError("Unsupported expression")
        return super().visit(node)

    def evaluate(self, expression):
        node = ast.parse(expression, mode='eval')
        return self.visit(node.body)

    def visit_BinOp(self, node):
        left = self.visit(node.left)
        right = self.visit(node.right)
        operator = node.op
        if isinstance(operator, ast.Add):
            return left + right
        elif isinstance(operator, ast.Sub):
            return left - right
        elif isinstance(operator, ast.Mult):
            return left * right
        elif isinstance(operator, ast.Div):
            return left / right
        elif isinstance(operator, ast.FloorDiv):
            return left // right
        elif isinstance(operator, ast.Pow):
            return left ** right
        else:
            raise ValueError("Unsupported operator")

    def visit_UnaryOp(self, node):
        operand = self.visit(node.operand)
        operator = node.op
        if isinstance(operator, ast.UAdd):
            return +operand
        elif isinstance(operator, ast.USub):
            return -operand
        else:
            raise ValueError("Unsupported unary operator")

    def visit_Num(self, node):
        return node.n

    def visit_Constant(self, node):  # สำหรับ Python 3.8 ขึ้นไป
        if isinstance(node.value, (int, float)):
            return node.value
        else:
            raise ValueError("Constants must be numbers")

def safe_eval(expr):
    evaluator = ExpressionEvaluator()
    try:
        value = evaluator.evaluate(expr.strip())
        return int(value)
    except Exception as e:
        raise ValueError(f"Invalid expression: {expr}")

class SettingsWidget(QWidget):
    update_exception_hosts_signal = pyqtSignal(set)
    SETTINGS_FILE='settings.json'
    def __init__(self, queue, offline_dict, stop_event, semaphore, host_info_list, tab_widget, main_window):
        super().__init__()
        self.tab_widget = tab_widget
        self.queue = queue
        self.offline_dict = offline_dict
        self.stop_event = stop_event
        self.semaphore = semaphore
        self.host_info_list = host_info_list
        self.main_window = main_window
        self.group_size = GROUP_SIZE
        self.pop_up_alert_enabled = False
        self.sound_alert_enabled = True
        self.remote_alert = ''
        self.exception_hosts = set()
        self.sound_alert_patterns = set()
        self.font_size = FONT_SIZE
        self.red_alert_time = 15  # Default red alert time in minutes
        self.red_alert_color = QColor()  # Default red alert color        
        self.initUI()
        self.update_exception_hosts_signal.connect(self.update_exception_hosts_slot)
        self.load_settings()

    def initUI(self):
        layout = QFormLayout()
        self.alert_time_input = QLineEdit(self)
        self.alert_time_input.setText(str(ALERT_TIME))
        layout.addRow("Alert Time (seconds):", self.alert_time_input)
        self.alert_repeat_input = QLineEdit(self)
        self.alert_repeat_input.setText(str(ALERT_REPEAT))
        layout.addRow("Alert Repeat (seconds):", self.alert_repeat_input)
        self.alert_timeout_input = QLineEdit(self)
        self.alert_timeout_input.setText(str(ALERT_TIMEOUT))
        layout.addRow("Alert Timeout (seconds):", self.alert_timeout_input)
        self.offline_duration_input = QLineEdit(self)
        self.offline_duration_input.setText(str(OFFLINE_DURATION))
        layout.addRow("Offline Duration (seconds):", self.offline_duration_input)
        self.max_workers_input = QLineEdit(self)
        self.max_workers_input.setText(str(MAX_WORKERS))
        layout.addRow("Max Workers:", self.max_workers_input)
        self.max_pings_input = QLineEdit(self)
        self.max_pings_input.setText(str(MAX_PINGS))
        layout.addRow("Max Pings:", self.max_pings_input)
        self.group_size_input = QLineEdit(self)
        self.group_size_input.setText(str(GROUP_SIZE))
        layout.addRow("Group Size:", self.group_size_input)
        self.remote_alert_input = QLineEdit(self)
        layout.addRow("Remote Alert:", self.remote_alert_input)
        self.log_normal_input = QLineEdit(self)
        self.log_normal_input.setText(str(LOG_NORMAL))
        layout.addRow("Log normal if over seconds:", self.log_normal_input)
        self.font_size_input = QLineEdit(self)
        self.font_size_input.setText(str(self.font_size))
        layout.addRow("Font Size:", self.font_size_input)   

        # Create a label for Red Alert Time
        red_alert_time_label = QLabel("Red Alert Time (minutes):", self)

        # Create a horizontal layout for Red Alert Time Input and Color Picker
        red_alert_layout = QHBoxLayout()

        # Add the Red Alert Time Input
        self.red_alert_time_input = QLineEdit(self)
        self.red_alert_time_input.setText(str(self.red_alert_time))  # default value
        
        # Make the input expand to fill space
        self.red_alert_time_input.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
        
        red_alert_layout.addWidget(self.red_alert_time_input)

        # Add the Red Alert Color Picker Button
        self.red_alert_color_button = QPushButton("", self)
        self.red_alert_color_button.setFixedSize(25, 25)  # Make it a square

        # Set the size policy to fixed to prevent it from expanding
        self.red_alert_color_button.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)
        
        # Adjust the height to match the line edit
        self.red_alert_color_button.setFixedHeight(self.red_alert_time_input.sizeHint().height())

        self.red_alert_color_button.clicked.connect(self.choose_red_alert_color)
        red_alert_layout.addWidget(self.red_alert_color_button)

        # Ensure that the layout spacing is consistent
        red_alert_layout.setContentsMargins(0, 0, 0, 0)
        red_alert_layout.setSpacing(5)

        # Create a QWidget to hold the horizontal layout
        red_alert_widget = QWidget()
        red_alert_widget.setLayout(red_alert_layout)

        # Now, add the row to the form layout
        layout.addRow(red_alert_time_label, red_alert_widget)

        self.exception_hosts_text_edit = QTextEdit(self)
        self.exception_hosts_text_edit.setPlaceholderText("Hostnames separated by commas")
        self.exception_hosts_text_edit.textChanged.connect(self.update_exception_hosts)
        layout.addRow("Exception Alert Hosts:", self.exception_hosts_text_edit)
        self.sound_alert_hosts_text_edit = QTextEdit(self)
        self.sound_alert_hosts_text_edit.setPlaceholderText("Host patterns (wildcards allowed) separated by commas")
        self.sound_alert_hosts_text_edit.textChanged.connect(self.update_sound_alert_patterns)
        layout.addRow("Sound Alert Hosts:", self.sound_alert_hosts_text_edit)
        self.pop_up_alert_checkbox = QCheckBox("Pop-up Alert", self)
        self.pop_up_alert_checkbox.setChecked(self.pop_up_alert_enabled)
        self.sound_alert_checkbox = QCheckBox("Sound Alert", self)
        self.sound_alert_checkbox.setChecked(self.sound_alert_enabled)
        checkboxes_widget = QWidget(self)
        checkboxes_layout = QHBoxLayout(checkboxes_widget)
        checkboxes_layout.addWidget(self.pop_up_alert_checkbox)
        checkboxes_layout.addWidget(self.sound_alert_checkbox)
        checkboxes_widget.setLayout(checkboxes_layout)
        layout.addRow("", checkboxes_widget)
        self.apply_button = QPushButton("Apply", self)
        self.apply_button.clicked.connect(self.apply_settings)
        layout.addRow("", self.apply_button)
        self.setLayout(layout)

    def choose_red_alert_color(self):
        color = QColorDialog.getColor(self.red_alert_color, self, "Select Red Alert Color")
        if color.isValid():
            self.red_alert_color = color
            self.red_alert_color_button.setStyleSheet(f"background-color: {color.name()};")
        else:
            # User canceled the color selection; set to no color
            self.red_alert_color = QColor()
            self.red_alert_color_button.setStyleSheet("")

    def apply_settings(self):
        self.update_global_settings()
        self.apply_font_size()            

        # Update the red_alert_time and red_alert_color in OfflineHostMonitor
        for i in range(self.tab_widget.count()):
            widget = self.tab_widget.widget(i)
            if isinstance(widget, OfflineHostMonitor):
                widget.set_red_alert_settings(self.red_alert_time, self.red_alert_color)

        #self.start_monitoring()
        #self.restart_monitoring()
        self.show_settings_applied()

    def update_exception_hosts_slot(self, exception_hosts):
        self.exception_hosts = exception_hosts
        self.exception_hosts_text_edit.setPlainText(', '.join(exception_hosts))

    def update_sound_alert_patterns(self):
        text = self.sound_alert_hosts_text_edit.toPlainText()
        pattern_list = [pattern.strip() for pattern in text.split(',') if pattern.strip()]
        self.sound_alert_patterns = set(pattern_list)
        self.save_settings()
        print("Updated sound alert patterns:", self.sound_alert_patterns)

    def load_settings(self):
        if os.path.exists(self.SETTINGS_FILE):
            with open(self.SETTINGS_FILE, 'r') as f:
                settings = json.load(f)
                sound_alert_patterns = settings.get('sound_alert_patterns', '')
                self.sound_alert_hosts_text_edit.setPlainText(sound_alert_patterns)
                pattern_list = [pattern.strip() for pattern in sound_alert_patterns.split(',') if pattern.strip()]
                self.sound_alert_patterns = set(pattern_list)
                self.red_alert_time_input.setText(str(settings.get('red_alert_time', '15')))
                color_name = settings.get('red_alert_color', '')
                if color_name:
                    self.red_alert_color = QColor(color_name)
                    if self.red_alert_color.isValid():
                        self.red_alert_color_button.setStyleSheet(f"background-color: {self.red_alert_color.name()};")
                    else:
                        self.red_alert_color = QColor()
                        self.red_alert_color_button.setStyleSheet("")
                else:
                    self.red_alert_color = QColor()
                    self.red_alert_color_button.setStyleSheet("")            
        else:
            print("Settings file not found. Using default settings.")

    def save_settings(self):
        settings = {}
        sound_alert_patterns = self.sound_alert_hosts_text_edit.toPlainText()
        settings['sound_alert_patterns'] = sound_alert_patterns
        settings['red_alert_time'] = self.red_alert_time_input.text()
        settings['red_alert_color'] = self.red_alert_color.name() if self.red_alert_color.isValid() else ''     
        with open(self.SETTINGS_FILE, 'w') as f:
            json.dump(settings, f, indent=4)

    def closeEvent(self, event):
        self.save_settings()
        event.accept()

    def update_global_settings(self):
        global ALERT_TIME, ALERT_REPEAT, ALERT_TIMEOUT, OFFLINE_DURATION, MAX_WORKERS, MAX_PINGS, GROUP_SIZE, LOG_NORMAL
        try:
            ALERT_TIME = safe_eval(self.alert_time_input.text())
            ALERT_REPEAT = safe_eval(self.alert_repeat_input.text())
            ALERT_TIMEOUT = safe_eval(self.alert_timeout_input.text())
            OFFLINE_DURATION = safe_eval(self.offline_duration_input.text())
            MAX_WORKERS = safe_eval(self.max_workers_input.text())
            MAX_PINGS = safe_eval(self.max_pings_input.text())
            GROUP_SIZE = safe_eval(self.group_size_input.text())
            LOG_NORMAL = safe_eval(self.log_normal_input.text())
            self.font_size = safe_eval(self.font_size_input.text())
            self.red_alert_time = safe_eval(self.red_alert_time_input.text())
            self.pop_up_alert_enabled = self.pop_up_alert_checkbox.isChecked()
            self.sound_alert_enabled = self.sound_alert_checkbox.isChecked()
            self.exception_hosts = set(hostname.strip().upper() for hostname in self.exception_hosts_text_edit.toPlainText().split(',') if hostname.strip())
            self.sound_alert_hosts = set(hostname.strip().upper() for hostname in self.sound_alert_hosts_text_edit.toPlainText().split(',') if hostname.strip())
            self.remote_alert = self.remote_alert_input.text()
            self.update_exception_hosts_signal.emit(self.exception_hosts)
        except ValueError as e:
            QMessageBox.warning(self, "Invalid Input", str(e))

    def update_exception_hosts(self):
        self.exception_hosts = set(hostname.strip().upper() for hostname in self.exception_hosts_text_edit.toPlainText().split(',') if hostname.strip())

    def apply_font_size(self):
        for i in range(self.tab_widget.count()):
            widget = self.tab_widget.widget(i)
            if isinstance(widget, OfflineHostMonitor):
                widget.set_font_size(self.font_size)
            #if isinstance(widget, ReturnOnlineWidget):
            #    widget.set_font_size(self.font_size)

    monitoring_threads = {}
    def start_monitoring(self):
       for host_info in self.host_info_list:
           hostname, _, _, _, _ = host_info
           normalized_hostname = hostname.upper()
           if normalized_hostname not in self.monitoring_threads or not self.monitoring_threads[normalized_hostname].is_alive():
               thread = threading.Thread(
                   target=monitor_host,
                   args=(host_info, self.queue, self.offline_dict, self.stop_event, self.semaphore, self.tab_widget.widget(0)),
                   daemon=True
               )
               thread.start()
               self.monitoring_threads[normalized_hostname] = thread

    def restart_monitoring(self):
        self.stop_event.set()
        time.sleep(1)
        self.stop_event.clear()
        self.semaphore = threading.Semaphore(MAX_PINGS)
        self.queue.queue.clear()
        self.monitoring_threads.clear()
        self.start_monitoring()

    def check_alerts(self):
        current_time = time.time()
        for hostname, details in self.offline_dict.items():
            duration_seconds = int(current_time - details['start_time'])
            if duration_seconds > ALERT_TIME and current_time - details['last_alert_time'] > ALERT_REPEAT:
                normalized_hostname = hostname.lower()
                exception_hosts_lower = {h.lower() for h in self.exception_hosts}
                if normalized_hostname not in exception_hosts_lower:
                    threading.Thread(target=self.trigger_alert, args=(hostname, details), daemon=True).start()
                details['last_alert_time'] = current_time

    def show_settings_applied(self):
        self.tab_widget.setCurrentIndex(0)

class OfflineHostMonitor(QWidget):
    update_inspect_status = pyqtSignal(str, str)
    def __init__(self, queue, offline_dict, stop_event, semaphore, remote_alert=''):
        super().__init__()
        self.queue = queue
        self.offline_dict = offline_dict
        self.stop_event = stop_event
        self.semaphore = semaphore
        self.remote_alert = remote_alert
        self.settings_widget = None
        self.attempts_dict = {}
        self.update_inspect_status.connect(self.on_update_inspect_status)

        self.red_alert_time = 15  # default value in minutes
        self.red_alert_color = QColor()  # default alert color

        self.initUI()
        self.update_signal = pyqtSignal()
        threading.Thread(target=update_offline_list, args=(self.queue, self.offline_dict, self.stop_event, self.update_signal, self.settings_widget, self), daemon=True).start()
        self.timer = QTimer(self)
        self.timer.timeout.connect(self.refresh_table)
        self.timer.start(1000)  # Refresh every second
        self.inspect_filter_state = 0  # 0: All, 1: WAN down & Server up, 2: Server down & Server up
        self.sound_manager = SoundManager()

    def set_red_alert_settings(self, red_alert_time, red_alert_color):
        self.red_alert_time = red_alert_time
        self.red_alert_color = red_alert_color

    def show_context_menu(self, position):
        index = self.table_widget.horizontalHeader().logicalIndexAt(position)
        if index == 6:
            menu = QMenu(self)
            filter_all_action = QAction('Show All', self)
            filter_all_action.setCheckable(True)
            filter_wan_down_server_up_action = QAction('WAN down', self)
            filter_wan_down_server_up_action.setCheckable(True)
            filter_server_down_server_up_action = QAction('Server down', self)
            filter_server_down_server_up_action.setCheckable(True)
            filter_all_action.triggered.connect(lambda: self.apply_filter(0))
            filter_wan_down_server_up_action.triggered.connect(lambda: self.apply_filter(1))
            filter_server_down_server_up_action.triggered.connect(lambda: self.apply_filter(2))
            self.update_check_states(filter_all_action, filter_wan_down_server_up_action, filter_server_down_server_up_action)
            menu.addAction(filter_all_action)
            menu.addAction(filter_wan_down_server_up_action)
            menu.addAction(filter_server_down_server_up_action)
            menu.exec_(self.table_widget.horizontalHeader().viewport().mapToGlobal(position))

    def update_check_states(self, filter_all_action, filter_wan_down_server_up_action, filter_server_down_server_up_action):
        filter_all_action.setChecked(self.inspect_filter_state == 0)
        filter_wan_down_server_up_action.setChecked(self.inspect_filter_state == 1)
        filter_server_down_server_up_action.setChecked(self.inspect_filter_state == 2)

    def apply_filter(self, state):
        self.inspect_filter_state = state
        self.refresh_table()

    def closeEvent(self, event):
        self.stop_all_threads()
        self.sound_manager.stop()
        event.accept()

    def stop_all_threads(self):
        if hasattr(self, 'stop_event'):
            self.stop_event.set()

    def set_font_size(self, font_size):
        font = self.table_widget.font()
        font.setPointSize(font_size)
        self.table_widget.setFont(font)
        
        # Apply to headers
        header_font = self.table_widget.horizontalHeader().font()
        header_font.setPointSize(font_size)
        self.table_widget.horizontalHeader().setFont(header_font)

    def adjust_column_widths(self):
        table_width = self.table_widget.viewport().width()
        num_columns = self.table_widget.columnCount()
        total_column_width = sum(self.table_widget.columnWidth(i) for i in range(num_columns))
        if total_column_width > table_width:
            scale_factor = table_width / total_column_width
        else:
            scale_factor = 1.0
        for i in range(num_columns):
            current_width = self.table_widget.columnWidth(i)
            new_width = int(current_width * scale_factor)
            self.table_widget.setColumnWidth(i, new_width)
        min_column_width = 50
        for i in range(num_columns):
            if self.table_widget.columnWidth(i) < min_column_width:
                self.table_widget.setColumnWidth(i, min_column_width)
        self.table_widget.resizeRowsToContents()

    def on_update_inspect_status(self, hostname, inspect_status):
        try:
            row = self.table_widget.findItems(hostname, Qt.MatchExactly)[0].row()
            # do something with the row
        except IndexError:
            pass #print(f"Hostname '{hostname}' not found in table widget")

    def initUI(self):
        layout = QVBoxLayout()
        self.table_widget = QTableWidget(self)
        self.table_widget.setColumnCount(8)
        self.table_widget.setHorizontalHeaderLabels(["No", "Hostname", "Store Name", "Telephone", "Offline Time", "Duration Offline", "Inspect", "Comment"])
        self.table_widget.verticalHeader().setVisible(False)
        font = QFont()
        font.setPointSize(FONT_SIZE)
        self.table_widget.setFont(font)
        header_font = QFont()
        header_font.setPointSize(FONT_SIZE)
        header = self.table_widget.horizontalHeader()
        header.setFont(header_font)

        # Set resize modes for columns
        #header.setSectionResizeMode(QHeaderView.ResizeToContents)
        header.setSectionResizeMode(7, QHeaderView.Stretch)  # Stretch the 'Comment' column

        self.table_widget.setEditTriggers(QAbstractItemView.NoEditTriggers)
        self.table_widget.cellDoubleClicked.connect(self.on_cell_double_clicked)
        header.setContextMenuPolicy(Qt.CustomContextMenu)
        header.customContextMenuRequested.connect(self.show_context_menu)
        layout.addWidget(self.table_widget)
        self.setLayout(layout)
        self.setWindowTitle('Server Monitor')
        self.setGeometry(300, 300, 1100, 400)

    def resizeEvent(self, event):
        super().resizeEvent(event)
        table_width = self.table_widget.width()
        scrollbar_width = 20
        col_percentages = [0.01, 0.09, 0.20, 0.10, 0.15, 0.12, 0.09, 0.21]
        column_widths = [table_width * p for p in col_percentages]
        total_column_width = sum(column_widths)
        available_width = table_width - scrollbar_width
        if total_column_width > available_width:
            scale_factor = available_width / total_column_width
            column_widths = [width * scale_factor for width in column_widths]
        min_last_col_width = 5
        column_widths[-1] = max(column_widths[-1], min_last_col_width)
        for i, width in enumerate(column_widths):
            self.table_widget.setColumnWidth(i, int(width))

    def on_cell_double_clicked(self, row, column):
        if column == 1:  # Hostname column
            hostname = self.table_widget.item(row, 1).text()
            hostname_upper = hostname.upper()
            if hostname_upper not in self.settings_widget.exception_hosts:
                self.settings_widget.exception_hosts.add(hostname_upper)
                self.settings_widget.exception_hosts_text_edit.setPlainText(
                    ', '.join(sorted(self.settings_widget.exception_hosts))
                )
                self.show_toast("Exception")
            else:
                self.show_toast("In Except")
        elif column == 7:  # Comment column
            hostname = self.table_widget.item(row, 1).text()
            current_comment = self.table_widget.item(row, column).text()
            new_comment, ok = QInputDialog.getText(self, f"{hostname}", "Comment:", text=current_comment)
            if ok:
                self.update_comment(hostname, new_comment)
        elif column == 3:  # Telephone column
            hostname = self.table_widget.item(row, 1).text()
            telephone = self.table_widget.item(row, column).text()
            clipboard = QApplication.clipboard()
            clipboard.setText(telephone)
            self.show_toast("Copied")

    def show_toast(self, message):
        toast_label = QLabel(message, self)
        toast_label.setStyleSheet("background-color: rgba(0, 0, 0, 0.8); color: white; padding: 10px; border-radius: 6px;")
        toast_label.setAlignment(Qt.AlignCenter)
        toast_label.setGeometry(0, 0, 100, 33)  # Adjust size and position as needed
        toast_label.move(self.width() // 2 - toast_label.width() // 2, self.height() - toast_label.height() - 50)
        toast_label.show()
        QTimer.singleShot(1000, toast_label.hide)

    def set_row_color(self, row, color):
        for column in range(self.table_widget.columnCount()):
            item = self.table_widget.item(row, column)
            if item:
                item.setBackground(QBrush(color))

    def set_settings_widget(self, settings_widget):
        self.settings_widget = settings_widget

    def refresh_table(self):
        current_time = time.time()
        self.table_widget.setRowCount(0)

        filtered_offline = {
            hostname: details for hostname, details in self.offline_dict.items()
            if (current_time - details['start_time']) > OFFLINE_DURATION
        }

        if self.inspect_filter_state == 1:
            filtered_offline = {hostname: details for hostname, details in filtered_offline.items() if details.get('inspect_status') in ['WAN down', 'Server up']}
        elif self.inspect_filter_state == 2:
            filtered_offline = {hostname: details for hostname, details in filtered_offline.items() if details.get('inspect_status') in ['Server down', 'Server up']}

        sorted_offline = sorted(filtered_offline.items(), key=lambda item: current_time - item[1]['start_time'], reverse=True)

        if self.settings_widget:
            exception_hosts = self.settings_widget.exception_hosts

        for row, (hostname, details) in enumerate(sorted_offline):
            duration_seconds = int(current_time - details['start_time'])
            duration_minutes = duration_seconds / 60
            hours, remainder = divmod(duration_seconds, 3600)
            minutes, seconds = divmod(remainder, 60)
            duration = f"{hours:02}:{minutes:02}:{seconds:02}"
            comment = details.get('comment', '')
            inspect_status = details.get('inspect_status', 'Unknown')

            if duration_seconds > ALERT_TIME and current_time - details['last_alert_time'] > ALERT_REPEAT:
                if self.settings_widget:
                    normalized_hostname = hostname.upper()
                    exception_hosts_upper = {h.upper() for h in self.settings_widget.exception_hosts}
                    if normalized_hostname not in exception_hosts_upper:
                        if self.settings_widget.pop_up_alert_enabled:
                            threading.Thread(target=self.trigger_pop_up_alert, args=(hostname, details, duration), daemon=True).start()
                        if self.settings_widget.sound_alert_enabled and row < 10:  # check if hostname is less than 10
                            threading.Thread(target=self.trigger_sound_alert, args=(hostname, details, duration), daemon=True).start()
                details['last_alert_time'] = current_time

            self.table_widget.insertRow(row)
            item_no = QTableWidgetItem(str(row + 1))
            item_hostname = QTableWidgetItem(hostname)
            item_store_name = QTableWidgetItem(details['store_name'])
            item_telephone = QTableWidgetItem(details['telephone'])
            item_offline_time = QTableWidgetItem(details['offline_time'])
            item_duration = QTableWidgetItem(duration)
            item_inspect = QTableWidgetItem(inspect_status)
            item_comment = QTableWidgetItem(comment)

            item_no.setTextAlignment(Qt.AlignCenter)
            item_hostname.setTextAlignment(Qt.AlignCenter)
            item_offline_time.setTextAlignment(Qt.AlignCenter)
            item_duration.setTextAlignment(Qt.AlignCenter)
            item_inspect.setTextAlignment(Qt.AlignCenter)

            self.table_widget.setItem(row, 0, item_no)
            self.table_widget.setItem(row, 1, item_hostname)
            self.table_widget.setItem(row, 2, item_store_name)
            self.table_widget.setItem(row, 3, item_telephone)
            self.table_widget.setItem(row, 4, item_offline_time)
            self.table_widget.setItem(row, 5, item_duration)
            self.table_widget.setItem(row, 6, item_inspect)
            self.table_widget.setItem(row, 7, item_comment)

            #if hostname.startswith(("PTH11","PTH15")) or hostname.startswith(("169","s")):
            hostname_lower = hostname.lower()
            if any(fnmatch.fnmatch(hostname_lower, pattern.lower()) for pattern in self.settings_widget.sound_alert_patterns):
                self.set_row_color(row, QColor('lightyellow'))
            if duration_minutes >= self.red_alert_time and self.red_alert_color.isValid():
                self.set_row_color(row, self.red_alert_color)
            if inspect_status == "Server up":
                self.set_row_color(row, QColor('palegreen'))
            # Update the comment
            details['comment'] = self.table_widget.item(row, 7).text()

        self.adjust_row_heights()

    def adjust_row_heights(self):
        num_rows = self.table_widget.rowCount()
        self.table_widget.resizeRowsToContents()
        for row in range(num_rows):
            current_height = self.table_widget.rowHeight(row)
            new_height = int(current_height * 1.15)
            self.table_widget.setRowHeight(row, new_height)

    def update_comment(self, hostname, text):
        if hostname in self.offline_dict:
            self.offline_dict[hostname]['comment'] = text
            self.refresh_table()

    def trigger_alert(self, hostname, details, duration):
        if self.sound_alert_enabled:
            self.trigger_sound_alert(hostname, details)
        
        if self.pop_up_alert_enabled:
            self.trigger_pop_up_alert(hostname, details, duration)

    def trigger_pop_up_alert(self, hostname, details, duration):
        comment = details.get('comment', '')
        message = (f"Server: {hostname}  Store Name: {details['store_name']}\n\n"
                   f"Offline Time: {duration}\n\n"
                   f"Comment: {comment}")
        try:
            subprocess.run(["msg", "*", f"/TIME:{ALERT_TIMEOUT}", message], check=True, creationflags=subprocess.CREATE_NO_WINDOW)
        except subprocess.CalledProcessError as e:
            print(f"Failed to send pop-up message: {e}")
        except subprocess.TimeoutExpired:
            print("Pop-up message command timed out.")
        except Exception as e:
            print(f"An unexpected error occurred while sending pop-up alert: {e}")

    def trigger_sound_alert(self, hostname, details, inspect_status):
        hostname_lower = hostname.lower()
        if any(fnmatch.fnmatch(hostname_lower, pattern.lower()) for pattern in self.settings_widget.sound_alert_patterns):
            inspect_status = details.get('inspect_status', 'link down')
            store_name = details.get('store_name', 'Unknown Store')
            if inspect_status == 'WAN down':
                inspect_status = 'Link down'
            valid_statuses = {'Link down', 'Server down'}
            fallback_sound_files = {'Link down': 'linkdown.mp3','Server down': 'serverdown.mp3'}
            message = f"Big C {store_name} {inspect_status}"
            audio_filename = f'{message}.mp3'
            audio_path = os.path.join('sounds', audio_filename)
            if os.path.exists(audio_path):
                print(f"Sound file found: {audio_path}")
                self.sound_manager.play(audio_path)
            else:
                print(f"Sound file '{audio_filename}' does not exist. Attempting to download...")
                downloaded_file = download_audio(message)
                if downloaded_file and os.path.exists(downloaded_file):
                    print(f"Downloaded sound file: {downloaded_file}")
                    self.sound_manager.play(downloaded_file)
                else:
                    fallback_file = fallback_sound_files.get(inspect_status, None)
                    if fallback_file and os.path.exists(fallback_file):
                        print(f"Failed to download. Playing fallback sound file: {fallback_file}")
                        self.sound_manager.play(fallback_file)
                    else:
                        print(f"No valid sound file available for '{inspect_status}'.")
            print(f"Sound alert triggered for {hostname} {store_name} ({inspect_status})")

class SoundManager:
    def __init__(self, max_sounds=10):
        pygame.init()
        self.max_sounds = max_sounds
        self.sound_queue = deque()  # Use deque to easily limit the queue size
        self.playing_lock = threading.Lock()
        self.program_start_time = time.time()  # Track the program start time
        self.initial_delay_seconds = 30  # 30-second delay for initial sound ignore
        self.thread = threading.Thread(target=self._play_sounds, daemon=True)
        self.thread.start()

    def _play_sounds(self):
        while True:
            if not self.sound_queue:
                time.sleep(0.1)  # Sleep for a short while if no sounds are in the queue
                continue
            sound_file = self.sound_queue.popleft()  # Pop from the left
            if sound_file is None:
                break
            with self.playing_lock:
                try:
                    pygame.mixer.music.load(sound_file)
                    pygame.mixer.music.play()
                    while pygame.mixer.music.get_busy():
                        pygame.time.Clock().tick(10)
                except Exception as e:
                    print(f"Error playing sound {sound_file}: {e}")

    def play(self, sound_file):
        # Check if the current time is beyond the 30-second initial delay
        if time.time() - self.program_start_time > self.initial_delay_seconds:
            if len(self.sound_queue) < self.max_sounds:
                self.sound_queue.append(sound_file)

    def stop(self):
        self.sound_queue = deque()  # Clear the queue to stop any further sounds from playing
        pygame.quit()

class ReturnOnlineWidget(QWidget):
    dataUpdated = pyqtSignal()  # Define a signal to notify when data is updated

    def __init__(self, parent=None):
        super().__init__(parent)
        self.initUI()

    def set_font_size(self, font_size):
        font = self.table_widget.font()
        font.setPointSize(font_size)
        self.table_widget.setFont(font)
        header_font = self.table_widget.horizontalHeader().font()
        header_font.setPointSize(font_size)
        self.table_widget.horizontalHeader().setFont(header_font)

    def initUI(self):
        layout = QVBoxLayout(self)

        # Create filter controls
        self.start_date_edit = QDateEdit(self)
        self.start_date_edit.setDate(QDate.currentDate())
        self.start_date_edit.setCalendarPopup(True)
        self.start_date_edit.setDisplayFormat("yyyy-MM-dd")
        self.start_date_edit.dateChanged.connect(self.load_data)
        self.start_date_edit.setFixedWidth(120)  # Set fixed width
        self.start_date_edit.setLocale(english_locale)

        self.end_date_edit = QDateEdit(self)
        self.end_date_edit.setDate(QDate.currentDate())
        self.end_date_edit.setCalendarPopup(True)
        self.end_date_edit.setDisplayFormat("yyyy-MM-dd")
        self.end_date_edit.dateChanged.connect(self.load_data)
        self.end_date_edit.setFixedWidth(120)  # Set fixed width
        self.end_date_edit.setLocale(english_locale)

        self.status_filter = QComboBox(self)
        self.status_filter.addItems(['All', 'WAN down', 'Server down'])
        self.status_filter.currentTextChanged.connect(self.load_data)

        self.duration_edit = QLineEdit(self)
        self.duration_edit.setPlaceholderText(">= Minutes")
        self.duration_edit.textChanged.connect(self.load_data)  
        self.duration_edit.setValidator(QIntValidator(0, 999999, self))

        self.hostname_edit = QLineEdit(self)
        self.hostname_edit.setPlaceholderText("Hostname (All)")
        self.hostname_edit.textChanged.connect(self.load_data)

        self.export_button = QPushButton("Export to CSV", self)
        self.export_button.clicked.connect(self.export_to_csv)
        self.export_button.setFixedWidth(120)  # Set fixed width

        # Layout for filter controls
        filter_layout = QHBoxLayout()
        filter_layout.addWidget(QLabel("Start Date:", self))
        filter_layout.addWidget(self.start_date_edit)
        filter_layout.addWidget(QLabel("End Date:", self))
        filter_layout.addWidget(self.end_date_edit)
        filter_layout.addWidget(QLabel("Status:", self))
        filter_layout.addWidget(self.status_filter)
        filter_layout.addWidget(QLabel("Duration:", self))
        filter_layout.addWidget(self.duration_edit)        
        filter_layout.addWidget(QLabel("Hostname:", self))
        filter_layout.addWidget(self.hostname_edit)
        filter_layout.addWidget(self.export_button)
        layout.addLayout(filter_layout)

        # Status bar
        self.status_bar = QStatusBar(self)
        layout.addWidget(self.status_bar)

        # Create the table widget
        self.table_widget = QTableWidget(self)
        self.table_widget.setEditTriggers(QAbstractItemView.NoEditTriggers)

        # Set up table columns and headers
        self.table_widget.setColumnCount(7)
        self.table_widget.setHorizontalHeaderLabels(['Hostname', 'Storename', 'Start Offline', 'End Offline', 'Duration', 'Status', 'Comment'])

        # Set resize modes for the table columns
        header = self.table_widget.horizontalHeader()
        #header.setSectionResizeMode(QHeaderView.ResizeToContents)
        header.setStretchLastSection(True)  # Makes the 'Comment' column stretch
        
        # Optionally, adjust resize modes for specific columns
        # header.setSectionResizeMode(0, QHeaderView.ResizeToContents)  # 'Hostname'
        # header.setSectionResizeMode(1, QHeaderView.ResizeToContents)  # 'Storename'
        # header.setSectionResizeMode(2, QHeaderView.Stretch)           # 'Start Offline'
        # header.setSectionResizeMode(3, QHeaderView.Stretch)           # 'End Offline'
        # header.setSectionResizeMode(4, QHeaderView.ResizeToContents)  # 'Duration'
        # header.setSectionResizeMode(5, QHeaderView.ResizeToContents)  # 'Status'
        # header.setSectionResizeMode(6, QHeaderView.Stretch)           # 'Comment'
        
        # Adjust fonts
        font = QFont()
        font.setPointSize(12)
        self.table_widget.setFont(font)
        header.setFont(font)

        # Add table to layout
        layout.addWidget(self.table_widget)
        self.setLayout(layout)

        # Connect data updated signal
        self.dataUpdated.connect(self.load_data)

        # Initial data load
        self.load_data()

    def convert_to_seconds(self, duration):
        try:
            if duration.isdigit():
                return int(duration) * 60  # Convert minutes to seconds
            
            parts = duration.split(':')
            if len(parts) == 3:
                hours, minutes, seconds = map(int, parts)
                return hours * 3600 + minutes * 60 + seconds
            elif len(parts) == 2:  # Handle mm:ss format if needed
                minutes, seconds = map(int, parts)
                return minutes * 60 + seconds
            elif len(parts) == 1:  # Handle ss format if needed
                return int(parts[0])
        except ValueError:
            return None

    def load_data(self):
        folder_path = 'history_log'
        lock_path = 'history_log.lock'
        temp_file_path = 'history_log_temp.txt'
        lock = FileLock(lock_path)

        def is_older_than_180_days(date_str):
            date_format = "%Y-%m-%d"
            try:
                date_obj = datetime.strptime(date_str, date_format)
                return date_obj < datetime.now() - timedelta(days=180)
            except ValueError:
                return True

        try:
            with lock.acquire(timeout=5):  # Wait up to 5 seconds for the lock
                files_to_process = []
                for filename in os.listdir(folder_path):
                    # Exclude history_all.txt from processing
                    if filename.endswith(".txt") and filename != 'history_all.txt' and is_older_than_180_days(filename[:10]):
                        files_to_process.append(os.path.join(folder_path, filename))

                lines = []
                for file_path in files_to_process:
                    with open(file_path, 'r', encoding='utf-8') as file:
                        lines.extend(file.readlines())

                lines_before_cleanup = len(lines)
                lines_after_cleanup = 0
                removed_dates = set()
                with open(temp_file_path, 'w', encoding='utf-8') as temp_file:
                    for line in lines:
                        parts = line.strip().split('|')
                        if len(parts) >= 11:
                            end_offline_date_str = parts[6]  # parts[6] is online_date in 'YYYY-MM-DD' format
                            if is_older_than_180_days(end_offline_date_str):
                                removed_dates.add(end_offline_date_str)
                            else:
                                temp_file.write(line)
                                lines_after_cleanup += 1

                del lines  # Remove reference to lines
                if os.path.exists(temp_file_path):
                    try:
                        os.replace(temp_file_path, os.path.join(folder_path, 'history_all.txt'))
                    except Exception as e:
                        print(f"Error during file replacement: {e}")
                        return
                else:
                    print(f"Temporary file {temp_file_path} does not exist.")
                    return

            # Retrieve user inputs for filtering
            start_date = self.start_date_edit.date().toPyDate()  # Returns a datetime.date object
            end_date = self.end_date_edit.date().toPyDate()      # Returns a datetime.date object
            status_filter = self.status_filter.currentText()
            hostname_filter = self.hostname_edit.text().strip().lower()

            # Parse the duration filter
            user_input_duration = self.duration_edit.text().strip()
            if user_input_duration.isdigit():
                duration_filter = self.convert_to_seconds(user_input_duration)
            else:
                duration_filter = None  # If invalid, don't filter on duration

            rows = []
            with open(os.path.join(folder_path, 'history_all.txt'), 'r', encoding='utf-8') as file:
                for line in file:
                    parts = line.strip().split('|')
                    if len(parts) >= 11:
                        # Parse end_offline_date_str into a datetime.date object
                        try:
                            end_offline_date_str = parts[6]  # online_date
                            end_offline_date = datetime.strptime(end_offline_date_str, '%Y-%m-%d').date()
                        except ValueError:
                            continue  # Skip this line if date can't be parsed

                        # Check if the end_offline_date is within the selected date range
                        if start_date <= end_offline_date <= end_date:
                            # Apply status filter
                            if status_filter == 'All' or parts[9] == status_filter:
                                # Apply hostname filter
                                hostname = parts[2]
                                if hostname_filter == "" or hostname_filter.lower() in hostname.lower():
                                    # Convert duration from the file to seconds for comparison
                                    duration_str = parts[8]
                                    duration = self.convert_to_seconds(duration_str)
                                    if duration_filter is None or (duration is not None and duration >= duration_filter):
                                        start_offline = f"{parts[4]} {parts[5]}"  # start_date and start_time_str
                                        end_offline = f"{parts[6]} {parts[7]}"    # online_date and online_time_str
                                        rows.append([hostname, parts[3], start_offline, end_offline, duration_str, parts[9], parts[10]])

            rows.reverse()  # To show latest entries first

            # Set up table widget
            self.table_widget.setRowCount(len(rows))
            self.table_widget.setColumnCount(7)
            self.table_widget.setHorizontalHeaderLabels(['Hostname', 'Storename', 'Start Offline', 'End Offline', 'Duration', 'Status', 'Comment'])
            for row_idx, (hostname, storename, start_offline, end_offline, duration, status, comment) in enumerate(rows):
                self.table_widget.setItem(row_idx, 0, QTableWidgetItem(hostname))
                self.table_widget.setItem(row_idx, 1, QTableWidgetItem(storename))
                self.table_widget.setItem(row_idx, 2, QTableWidgetItem(start_offline))
                self.table_widget.setItem(row_idx, 3, QTableWidgetItem(end_offline))
                self.table_widget.setItem(row_idx, 4, QTableWidgetItem(duration))
                self.table_widget.setItem(row_idx, 5, QTableWidgetItem(status))
                self.table_widget.setItem(row_idx, 6, QTableWidgetItem(comment))
            self.table_widget.verticalHeader().setVisible(False)
            # Update status bar
            total_count = len(rows)
            wan_down_count = sum(1 for row in rows if row[5] == 'WAN down')
            server_down_count = sum(1 for row in rows if row[5] == 'Server down')
            self.status_bar.showMessage(f"Total: {total_count} | WAN down: {wan_down_count} | Server down: {server_down_count}")

        except Timeout:
            print("Failed to acquire file lock")
        except Exception as e:
            print(f"An error occurred: {e}")

    def resizeEvent(self, event):
        super().resizeEvent(event)
        table_width = self.table_widget.width()
        scrollbar_width = 20
        col_percentages = [0.13, 0.31, 0.20, 0.20, 0.10, 0.13, 0.13]
        column_widths = [table_width * p for p in col_percentages]
        total_column_width = sum(column_widths)
        if total_column_width > table_width:
            scale_factor = (table_width - scrollbar_width) / total_column_width
            column_widths = [width * scale_factor for width in column_widths]
        min_last_col_width = 40
        column_widths[-1] = max(column_widths[-1], min_last_col_width)
        for i, width in enumerate(column_widths):
            self.table_widget.setColumnWidth(i, int(width))
        #self.adjust_row_heights()

    def adjust_row_heights(self):
        num_rows = self.table_widget.rowCount()
        self.table_widget.resizeRowsToContents()
        for row in range(num_rows):
            current_height = self.table_widget.rowHeight(row)
            new_height = int(current_height * 1.1)
            self.table_widget.setRowHeight(row, new_height)

    def export_to_csv(self):
        start_date_str = self.start_date_edit.date().toString("yyyy-MM-dd")
        end_date_str = self.end_date_edit.date().toString("yyyy-MM-dd")
        default_filename = f"history_online_{start_date_str}-{end_date_str}.csv"
        file_path, _ = QFileDialog.getSaveFileName(self, "Save CSV File", default_filename, "CSV Files (*.csv)")
        if not file_path:
            return
        if not file_path.endswith(".csv"):
            file_path += ".csv"
        lock_path = 'history_online.lock'
        lock = FileLock(lock_path)
        try:
            with lock.acquire(timeout=10):  # Wait up to 10 seconds for the lock
                with open(file_path, 'w', newline='', encoding='utf-8-sig') as file:
                    writer = csv.writer(file)
                    writer.writerow(['Hostname', 'Storename', 'Start Offline', 'End Offline', 'Duration', 'Status', 'Comment'])
                    for row_idx in range(self.table_widget.rowCount()):
                        row_data = [self.table_widget.item(row_idx, col_idx).text() for col_idx in range(self.table_widget.columnCount())]
                        writer.writerow(row_data)

                print(f"Data exported to {file_path}")
        except Timeout:
            print("Failed to acquire file lock")

def read_host_list(file_path):
    host_info = []
    hostname_count = 0
    try:
        with open(file_path, 'r', encoding='utf-8-sig') as file:
            for line in file:
                line = line.strip()
                if line:
                    normalized_line = line.upper()
                    if normalized_line.startswith("#"):
                        print(f"Skipping line: {line}")
                        continue
                    parts = line.split('|')  # Change delimiter to |
                    if len(parts) > 5:
                        print(f"Warning: Line has too many parts, using only the first 5: {line}")
                        parts = parts[:5]  # Truncate to the first 5 parts
                    parts = parts + [''] * (5 - len(parts))
                    hostname = parts[0].strip()
                    store_name = parts[1].strip() if len(parts) > 1 else ""
                    telephone = parts[2].strip() if len(parts) > 2 else ""
                    wan_a = parts[3].strip() if len(parts) > 3 else ""
                    wan_b = parts[4].strip() if len(parts) > 4 else ""
                    host_info.append((hostname, store_name, telephone, wan_a, wan_b))
                    hostname_count += 1
    except Exception as e:
        print(f"Error reading file '{file_path}': {e}")
    group_size = max(1,(hostname_count + 19) // GROUP_SIZE)
    grouped_host_info = [host_info[i:i + group_size] for i in range(0, hostname_count, group_size)]

    # Reorder the groups to prevent consecutive repeats of the last hostname
    host_info = []
    for i in range(group_size):
        for group in grouped_host_info:
            if i < len(group):
                host_info.append(group[i])
        # Rotate the groups to prevent consecutive repeats
        grouped_host_info = grouped_host_info[1:] + [grouped_host_info[0]]

    #return reordered_host_info, hostname_count
    return host_info, hostname_count

def count_hostnames(file_path):
    try:
        with open(file_path, 'r', encoding='utf-8') as file:
            return sum(1 for line in file if line.strip())
    except Exception as e:
        print(f"Error reading file '{file_path}': {e}")
        return 0

prev_ping_time = 0
def check_port(hostname, port, timeout):
    try:
        with socket.create_connection((hostname, port), timeout=timeout):
            return port
    except (socket.timeout, ConnectionRefusedError, OSError):
        return None

def tcp_socket(hostname, wan_a=None, wan_b=None, timeout=2):
    global prev_ping_time
    n = QTime.currentTime().toString("hh:mm:ss")
    inspect_status = ""
    ports = [80, 8080, 22, 23, 3389]

    if hostname.startswith("169.254.163.169"): 
        current_time = time.time()
        time_diff = current_time - prev_ping_time if prev_ping_time != 0 else 0
        print(f"{n} Ping Checked (Diff previous ping: {time_diff:.2f}s)")
        prev_ping_time = current_time

    # Check the first port (80) sequentially
    if check_port(hostname, ports[0], timeout):
        inspect_status = "Server up"
        return True, inspect_status

    # Check remaining ports in parallel
    with ThreadPoolExecutor() as executor:
        future_to_port = {executor.submit(check_port, hostname, port, timeout): port for port in ports[1:]}
        for future in as_completed(future_to_port):
            result = future.result()
            if result is not None:
                inspect_status = "Server up"
                # Cancel any outstanding futures
                for pending_future in future_to_port:
                    if pending_future != future:
                        pending_future.cancel()
                return True, inspect_status

    # Second Checking
    if hostname.startswith(("PTH2", "PTH3")):
        try:
            ip = socket.gethostbyname(hostname)
            wan_ip = '.'.join(ip.split('.')[:-1] + ['10'])
            try:
                with socket.create_connection((wan_ip, 23), timeout=timeout):
                    inspect_status = "Server down"
                    return False, inspect_status
            except (socket.timeout, ConnectionRefusedError, OSError):
                inspect_status = "WAN down"
                return False, inspect_status
        except (socket.gaierror, socket.timeout, ConnectionRefusedError, OSError):
            inspect_status = "WAN down"
            return False, inspect_status
    elif hostname.startswith(("PTH11", "PTH15")) or hostname.startswith(("169", "s")):
        for ip, port in [(wan_a, 23), (wan_b, 23)]:
            if ip:
                try:
                    with socket.create_connection((ip, port), timeout=timeout):
                        inspect_status = "Server down"
                        return False, inspect_status
                except (socket.timeout, ConnectionRefusedError, OSError):
                    pass
        inspect_status = "WAN down"
        return False, inspect_status
    else:
        inspect_status = "Server down"
        return False, inspect_status

def get_google_translate_tts_url(text, lang='th'):
    """Get the URL for Google Translate TTS."""
    url = 'https://translate.google.com/translate_tts'
    params = {
        'ie': 'UTF-8',
        'q': text,
        'tl': lang,
        'client': 'gtx'
    }
    return url, params

def download_audio(text, lang='th'):
    try:
        url, params = get_google_translate_tts_url(text, lang)
        response = requests.get(url, params=params, headers={'User-Agent': 'Mozilla/5.0'})
        response.raise_for_status()
        sounds_folder = 'sounds'
        if not os.path.exists(sounds_folder):
            os.mkdir(sounds_folder)
        audio_filename = f'{text}.mp3'
        audio_path = os.path.join(sounds_folder, audio_filename)
        with open(audio_path, 'wb') as audio_file:
            audio_file.write(response.content)
        print(f"Audio saved to {audio_path}")
        return audio_path
    except requests.RequestException as e:
        print(f"Failed to download audio: {e}")
        return None

offline_dict_lock = Lock()
def schedule_host_deletion(hostname, offline_dict, update_signal, settings_widget, lock, main_window):
    def delete_host():
        normalized_hostname = hostname.upper()
        with lock:
            if normalized_hostname in offline_dict:
                store_name = offline_dict[normalized_hostname]['store_name']
                log_online(
                    hostname,
                    store_name,
                    offline_dict,
                    normalized_hostname,
                    offline_dict[normalized_hostname]['inspect_status']
                )
                offline_duration = time.time() - offline_dict[normalized_hostname]['start_time']

                if settings_widget.sound_alert_enabled and offline_duration > OFFLINE_DURATION and len(main_window.sound_manager.sound_queue) < main_window.sound_manager.max_sounds:
                    hostname_lower = hostname.lower()
                    if any(fnmatch.fnmatch(hostname_lower, pattern.lower()) for pattern in settings_widget.sound_alert_patterns):
                        if hasattr(main_window, 'sound_manager'):
                            message = f"Big C {store_name} return to Online"
                            audio_filename = f"{message}.mp3"
                            audio_path = os.path.join('sounds', audio_filename)
                            fallback_sound_file = "returnonline.mp3"

                            def play_sound():
                                if os.path.exists(audio_path):
                                    main_window.sound_manager.play(audio_path)
                                else:
                                    print(f"Sound file '{audio_filename}' does not exist. Attempting to download...")
                                    downloaded_file = download_audio(message)
                                    if downloaded_file and os.path.exists(downloaded_file):
                                        main_window.sound_manager.play(downloaded_file)
                                    else:
                                        if os.path.exists(fallback_sound_file):
                                            print(f"Failed to download. Playing fallback sound file: {fallback_sound_file}")
                                            main_window.sound_manager.play(fallback_sound_file)
                                        else:
                                            print("Failed to download sound file and no fallback sound available.")

                            sound_thread = threading.Thread(target=play_sound)
                            sound_thread.start()

                del offline_dict[normalized_hostname]
                save_offline_state('offline_state.json', offline_dict)

                if normalized_hostname in settings_widget.exception_hosts:
                    settings_widget.exception_hosts.remove(normalized_hostname)
                    settings_widget.update_exception_hosts_signal.emit(settings_widget.exception_hosts)
            #else:
                #print(f"Hostname {normalized_hostname} was not in offline_dict")

        update_signal.emit()

    timer = threading.Timer(5.0, delete_host)
    timer.start()

def update_offline_list(queue, offline_dict, stop_event, update_signal, settings_widget, main_window):
    if stop_event is None:
        print("Stop event is None")
        return
    while not stop_event.is_set():
        try:
            hostname, store_name, telephone, is_online, inspect_status = queue.get(timeout=1)
            normalized_hostname = hostname.upper()

            if is_online:
                if normalized_hostname in offline_dict:
                    # Schedule the deletion after 1 second without blocking the loop
                    schedule_host_deletion(hostname, offline_dict, update_signal, settings_widget, offline_dict_lock, main_window)
            elif not is_online and normalized_hostname not in offline_dict:
                with offline_dict_lock:
                    offline_dict[normalized_hostname] = {
                        'store_name': store_name,
                        'telephone': telephone,
                        'start_time': time.time(),
                        'offline_time': time.strftime('%Y-%m-%d %H:%M:%S', time.localtime()),
                        'last_alert_time': 0,
                        'inspect_status': inspect_status
                    }
                update_signal.emit()
            queue.task_done()
        except Empty:
            time.sleep(1)
        except Exception as e:
            print(f"Error in update_offline_list: {e}")

def monitor_host(host_info, queue, offline_dict, stop_event, semaphore, main_window):
    global previous_status
    previous_status = {} 
    hostname, store_name, telephone, wan_a, wan_b = host_info
    normalized_hostname = hostname.upper()
    while not stop_event.is_set():
        with semaphore:
            is_online, inspect_status = tcp_socket(hostname, wan_a, wan_b)
        if main_window is not None and hasattr(main_window, 'update_inspect_status'):
            main_window.update_inspect_status.emit(hostname, inspect_status)
        #main_window.update_inspect_status.emit(hostname, inspect_status)
        if not is_online:
            if normalized_hostname not in offline_dict:
                offline_dict[normalized_hostname] = {
                    'store_name': store_name,
                    'telephone': telephone,
                    'start_time': time.time(),
                    'offline_time': time.strftime('%Y-%m-%d %H:%M:%S', time.localtime()),
                    'last_alert_time': 0,
                    'inspect_status': inspect_status
                }
            else:
                offline_dict[normalized_hostname]['inspect_status'] = inspect_status
                previous_status[normalized_hostname] = inspect_status  # store previous status
        else:
            if normalized_hostname in offline_dict:
                offline_dict[normalized_hostname]['inspect_status'] = inspect_status
        queue.put((hostname, store_name, telephone, is_online, inspect_status))
        time.sleep(3)

file_lock = threading.Lock()
previous_status = {}
def log_online(hostname, store_name, offline_dict, normalized_hostname, inspect_status):
    global previous_status
    start_time = offline_dict[normalized_hostname]['start_time']
    online_time = time.time()
    offline_duration = online_time - start_time
    duration_time = time.strftime('%H:%M:%S', time.gmtime(offline_duration))
    start_date = time.strftime('%Y-%m-%d', time.localtime(start_time))
    start_time_str = time.strftime('%H:%M:%S', time.localtime(start_time))
    online_date = time.strftime('%Y-%m-%d', time.localtime(online_time))
    online_time_str = time.strftime('%H:%M:%S', time.localtime(online_time))
    previous_status_str = previous_status.get(normalized_hostname, "Server down")  # Get previous status
    comment = offline_dict[normalized_hostname].get('comment', '')

    if offline_duration > LOG_NORMAL:  # Only write to file if offline duration exceeds LOG_NORMAL
        log_entry = (
            f"{online_date}|{online_time_str}|{hostname}|{store_name}|"
            f"{start_date}|{start_time_str}|{online_date}|{online_time_str}|"
            f"{duration_time}|{previous_status_str}|{comment}\n"
        )

        def backup_history():
            backup_dir = 'backup'
            os.makedirs(backup_dir, exist_ok=True)  # Create backup folder if it doesn't exist
            timestamp = time.strftime('%Y%m%d_%H%M%S', time.localtime(online_time))
            backup_filename = f"history_online_backup_{timestamp}.txt"
            backup_path = os.path.join(backup_dir, backup_filename)

            # Get a list of existing backup files
            backup_files = [f for f in os.listdir(backup_dir) if f.startswith('history_online_backup_')]

            # If there are more than 1 backup files, remove the oldest one
            if len(backup_files) >= 1:
                oldest_file = min(backup_files, key=lambda f: os.path.getctime(os.path.join(backup_dir, f)))
                os.remove(os.path.join(backup_dir, oldest_file))

            try:
                if os.path.exists(os.path.join('history_log', f"history_online_{online_date}.txt")):
                    shutil.copy(os.path.join('history_log', f"history_online_{online_date}.txt"), backup_path)
                    #print(f"Backup successful: {backup_path}")
                else:
                    print(f"No history_online_{online_date}.txt file available for backup.")
            except Exception as e:
                print(f"Error occurred while backing up the file: {e}")

        # Call the backup function before writing new data
        backup_history()

        # Write new data to the file
        try:
            log_dir = 'history_log'
            os.makedirs(log_dir, exist_ok=True)  # Create log folder if it doesn't exist
            with open(os.path.join(log_dir, f"history_online_{online_date}.txt"), 'a', encoding='utf-8') as file:
                file.write(log_entry)
            #print(f"Log entry written successfully to {log_dir}/history_online_{online_date}.txt")
        except Exception as e:
            print(f"Error occurred while writing the log entry: {e}")

save_lock = threading.Lock()
def save_offline_state(file_path, offline_dict):
    backup_folder = os.path.join(os.path.dirname(file_path), 'backup')
    if not os.path.exists(backup_folder):
        os.makedirs(backup_folder)

    backup_file_path = os.path.join(backup_folder, os.path.basename(file_path) + '.bak')
    if os.path.exists(file_path):
        shutil.copyfile(file_path, backup_file_path)

    temp_file_path = file_path + '.tmp'
    with save_lock:
        try:
            with open(temp_file_path, 'w', encoding='utf-8') as temp_file:
                json.dump(offline_dict, temp_file, ensure_ascii=False, indent=4)
            os.replace(temp_file_path, file_path)
            #print(f"Offline state saved to '{file_path}'")
        except Exception as e:
            #print(f"Error saving offline state to '{file_path}': {e}")
            if os.path.exists(temp_file_path):
                os.remove(temp_file_path)

def load_offline_state(file_path):
    current_time = time.time()
    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    backup_filename = f"offline_state_as_open_{timestamp}.json"
    
    # Ensure the history_log directory exists
    history_log_dir = "history_log"
    os.makedirs(history_log_dir, exist_ok=True)
    
    if os.path.exists(file_path):
        try:
            # Copy the file to the history_log directory with the new name
            backup_file_path = os.path.join(history_log_dir, backup_filename)
            shutil.copy(file_path, backup_file_path)
            print(f"Offline state backed up to '{backup_file_path}'")

            with open(file_path, 'r', encoding='utf-8') as file:
                offline_dict = json.load(file)
                offline_dict = {hostname.upper(): details for hostname, details in offline_dict.items()}
                for details in offline_dict.values():
                    details['last_alert_time'] = current_time
            print(f"Offline state loaded from '{file_path}'")
            return offline_dict
        except Exception as e:
            print(f"Error loading offline state from '{file_path}': {e}")
            return {}
    else:
        print(f"File '{file_path}' does not exist.")
        return {}

def setup_application():
    return QApplication(sys.argv)

LOCK_FILE = "program.lock"

class LockManager:
    def __init__(self, filename):
        self.filename = filename
        self.file = None

    def acquire(self):
        self.file = open(self.filename, 'w')
        try:
            msvcrt.locking(self.file.fileno(), msvcrt.LK_NBLCK, 1)
        except (IOError, OSError):
            self.file.close()
            raise

    def release(self):
        try:
            if self.file:
                msvcrt.locking(self.file.fileno(), msvcrt.LK_UNLCK, 1)
                self.file.close()
                os.remove(self.filename)
        except Exception as e:
            print(f"Error releasing lock: {e}")

from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
class HostnameFileEventHandler(FileSystemEventHandler):
    def __init__(self, main_window, filename):
        super().__init__()
        self.main_window = main_window
        self.filename = filename

    def on_modified(self, event):
        if event.src_path.endswith(self.filename):
            self.reload_hosts()

    def reload_hosts(self):
        try:
            host_info_list, hostname_count = read_host_list(self.filename)
            print(f"Reloaded: Number of hostnames in file: {hostname_count}")
            # Ensure that active threads are stopped and restarted with new hosts
            if not host_info_list:
                sys.exit()
            # Clear existing host info and restart monitoring
            self.main_window.stop_all_threads()
            self.main_window.host_info_list = host_info_list
            self.main_window.start_monitoring()
        except Exception as e:
            QMessageBox.warning(None, "Error", f"Failed to reload hostnames: {e}")

def monitor_hostname_file(main_window, filename='hostname.txt'):
    event_handler = HostnameFileEventHandler(main_window, filename)
    observer = Observer()
    observer.schedule(event_handler, os.path.dirname(os.path.abspath(filename)), recursive=False)
    observer.start()
    return observer

def main():
    # Initialize PyQt5 application
    app = QApplication(sys.argv)

    lock_manager = LockManager(LOCK_FILE)
    try:
        lock_manager.acquire()
    except (IOError, OSError):
        QMessageBox.warning(None, "", "The program is already running.")
        if lock_manager.file:
            lock_manager.file.close()
        sys.exit()
    
    atexit.register(lock_manager.release)

    # Your main program logic here
    print("Program is running...")

    global MAX_PINGS, MAX_WORKERS

    tab_widget = QTabWidget()
    
    # Initialize SoundManager (assuming this is defined elsewhere in your code)
    sound_manager = SoundManager()

    # Main widget and layout setup
    main_widget = QWidget()
    main_layout = QVBoxLayout(main_widget)

    # UI setup (e.g., labels for status information)
    host_label = QLabel()
    host_label.setAlignment(Qt.AlignRight | Qt.AlignVCenter)
    host_label.setStyleSheet("font-size: 12pt; color: black; padding-right: 10px;")

    clock_label = QLabel()
    clock_label.setAlignment(Qt.AlignRight | Qt.AlignVCenter)
    clock_label.setStyleSheet("font-size: 12pt;")

    # Arrange layout
    main_layout.addWidget(host_label)
    main_layout.addWidget(tab_widget)
    main_layout.addWidget(clock_label)
    main_widget.setLayout(main_layout)
    main_widget.setWindowTitle("Server Monitor - Alert")
    main_widget.setGeometry(300, 300, 1100, 600)

    # Function to update status labels
    def update_labels():
        current_time = QTime.currentTime().toString("hh:mm:ss")
        current_date = QDate.currentDate().toString("dd MMM yyyy")
        # Assuming host_info_dict is defined/available
        total_hosts = len(host_info_dict)
        offline_hosts = 0  # Implement logic to determine online/offline hosts
        offline_hosts_wan = 0  # Implement logic to specifically track WAN status
        offline_hosts_serv = 0  # Implement logic for Server status
        
        # Example label updates
        host_label.setText(f"Total: {total_hosts}   Online: {total_hosts - offline_hosts}   Offline: {offline_hosts}   [ Server: {offline_hosts_serv}   Wan: {offline_hosts_wan} ]")
        clock_label.setText(f"{current_date} - {current_time}  ")

    # Timer for updating labels
    timer = QTimer()
    timer.timeout.connect(update_labels)
    timer.start(1000)  # Update every second

    # Create main UI components
    main_window = OfflineHostMonitor(None, None, None, None)
    tab_widget.addTab(main_window, "Monitor")
    return_online_widget = ReturnOnlineWidget()
    tab_widget.addTab(return_online_widget, "Return Online")
    main_window.sound_manager = sound_manager  # Attach the sound manager to the main window
    settings_widget = SettingsWidget(None, None, None, None, None, tab_widget, main_window)
    tab_widget.addTab(settings_widget, "Settings")
    update_log_widget = UpdateLogWidget()
    tab_widget.addTab(update_log_widget, "Update Log")
    main_window.settings_widget = settings_widget

    observer = monitor_hostname_file(main_window)

    # Main event loop
    try:
        main_window.show()
        sys.exit(app.exec_())
    finally:
        observer.stop()
        observer.join()

    # Prepare application exit cleanup
    def cleanup():
        stop_event.set()  # Signal all threads to stop
        for thread in active_threads:
            thread.join()  # Wait for threads to finish

    # Connect cleanup on application exit
    app.aboutToQuit.connect(cleanup)

    # File path setup and initial checks
    file_path = 'hostname.txt'
    offline_state_file = 'offline_state.json'
    if not os.path.exists(file_path):
        QMessageBox.critical(None, "File Not Found", "The file 'hostname.txt' was not found. Exiting the application.")
        sys.exit()
        
    host_info_list, hostname_count = read_host_list(file_path)
    print(f"Number of hostnames in file: {hostname_count}")
    if not host_info_list:
        sys.exit()

    # Load offline state
    offline_dict = load_offline_state(offline_state_file)
    host_info_dict = {hostname.upper(): (hostname, store_name, telephone, wan_a, wan_b) for hostname, store_name, telephone, wan_a, wan_b in host_info_list}
    offline_dict = {hostname: details for hostname, details in offline_dict.items() if hostname in host_info_dict}
    
    # Queue and threading setup
    queue = Queue()
    stop_event = threading.Event()
    active_threads = []
    cpu_count = psutil.cpu_count(logical=True)
    memory = psutil.virtual_memory()
    available_memory_gb = memory.available / (1024 ** 2)
    max_pings_based_on_memory = int(available_memory_gb / 0.1)
    MAX_PINGS = min(MAX_PINGS, max_pings_based_on_memory)
    semaphore = threading.Semaphore(MAX_PINGS)
    
    # Assign globals to widgets
    main_window.queue = queue
    main_window.offline_dict = offline_dict
    main_window.stop_event = stop_event
    main_window.semaphore = semaphore
    settings_widget.queue = queue
    settings_widget.offline_dict = offline_dict
    settings_widget.stop_event = stop_event
    settings_widget.semaphore = semaphore
    settings_widget.host_info_list = host_info_list
    return_online_signal = return_online_widget.dataUpdated
    
    # Start monitoring threads for each host
    for host_info in host_info_list:
        thread = threading.Thread(
            target=monitor_host,
            args=(host_info, queue, offline_dict, stop_event, semaphore, main_window)
        )
        thread.start()
        active_threads.append(thread)
    
    # Start thread to handle offline list updates
    update_thread = threading.Thread(
        target=update_offline_list,
        args=(queue, offline_dict, stop_event, return_online_signal, settings_widget, main_window),
        daemon=True
    )
    update_thread.start()
    active_threads.append(update_thread)
    
    # Show main widget
    main_widget.show()
    
    # Ensure state is saved on app quit
    app.aboutToQuit.connect(lambda: save_offline_state(offline_state_file, offline_dict))

    sys.exit(app.exec_())

if __name__ == "__main__":
    main()

i got error

Traceback (most recent call last):
  File "C:\Users\Noname\phyper\phyper.v49.7.py", line 1534, in update_labels
    total_hosts = len(host_info_dict)
                      ^^^^^^^^^^^^^^
NameError: cannot access free variable 'host_info_dict' where it is not associated with a value in enclosing scope