import sys, os, time, subprocess, threading, psutil, socket, requests, platform, base64, json, ipaddress, csv, io, winsound, tempfile, ffmpeg, pyexpat
from queue import Queue, Empty
from PyQt5.QtWidgets import (QApplication, QWidget, QVBoxLayout, QLineEdit, QLabel, # type: ignore
                             QTabWidget, QPushButton, QMessageBox, QTableWidget, QTableWidgetItem,
                             QFormLayout, QCheckBox, QTextEdit, QComboBox, QInputDialog, QHBoxLayout,
                             QAbstractItemView, QHeaderView, QDialog, QTableView, QStatusBar,
                             QDateEdit, QFileDialog, QMenu, QAction, QStyledItemDelegate, QStackedWidget )
from PyQt5.QtCore import QTimer, Qt, QByteArray, QThread, pyqtSignal, QObject, QDate, QTime, QRect # type: ignore
from PyQt5 import QtGui # type: ignore
from PyQt5.QtGui import QIcon, QPixmap, QClipboard, QColor, QBrush, QFont, QIntValidator, QPainter # type: ignore
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
import urllib.parse
import urllib.request

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 = 10           # Maximum number of concurrent pings
GROUP_SIZE = 10         # Make groups of hostname
LOG_NORMAL = 60         # Write host retrun online after 60 seconds
FONT_SIZE = 14

class SettingsWidget(QWidget):
    update_exception_hosts_signal = pyqtSignal(set)
    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.font_size = FONT_SIZE
        self.initUI()
        self.update_exception_hosts_signal.connect(self.update_exception_hosts_slot)

    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)        
        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.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 apply_settings(self):
        try:
            self.update_global_settings()
            self.apply_font_size()            
            #self.start_monitoring()
            #self.restart_monitoring()
            self.show_settings_applied()
        except ValueError as e:
            QMessageBox.warning(self, "Invalid Input", str(e))

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

    def update_global_settings(self):
        global ALERT_TIME, ALERT_REPEAT, ALERT_TIMEOUT, OFFLINE_DURATION, MAX_WORKERS, MAX_PINGS, GROUP_SIZE, LOG_NORMAL
        ALERT_TIME = int(self.alert_time_input.text())
        ALERT_REPEAT = int(self.alert_repeat_input.text())
        ALERT_TIMEOUT = int(self.alert_timeout_input.text())
        OFFLINE_DURATION = int(self.offline_duration_input.text())
        MAX_WORKERS = int(self.max_workers_input.text())
        MAX_PINGS = int(self.max_pings_input.text())
        GROUP_SIZE = int(self.group_size_input.text())
        LOG_NORMAL = int(self.log_normal_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.remote_alert = self.remote_alert_input.text()
        self.font_size = int(self.font_size_input.text())
        self.update_exception_hosts_signal.emit(self.exception_hosts)

    def update_exception_hosts(self):
        # Update the exception hosts set based on the text edit widget
        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):
        # Apply font size to table and headers in OfflineHostMonitor
        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)

    def start_monitoring(self):
        group_size = max(self.group_size, 1)
        num_groups = (len(self.host_info_list) + group_size - 1) // group_size
        parts = [self.host_info_list[i * group_size:(i + 1) * group_size] for i in range(num_groups)]
        def start_batch(hosts_batch):
            for host_info in hosts_batch:
                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).start()
        for part in parts:
            start_batch(part)

        if isinstance(self.tab_widget.widget(1), OfflineHostMonitor):
            self.tab_widget.widget(1).remote_alert = self.remote_alert

    def restart_monitoring(self):
        self.stop_event.set()
        time.sleep(0.5)
        self.stop_event.clear()
        self.semaphore = threading.Semaphore(MAX_PINGS)
        self.queue.queue.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.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), 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 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)  # Increase column count by 1
        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)
        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, 0.10, 0.26, 0.10, 0.16, 0.13, 0.10, 0.11]
        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)

        # Create a copy of self.offline_dict
        offline_dict_copy = self.offline_dict.copy()

        # Remove hosts that are back online
        for hostname in list(offline_dict_copy.keys()):
            details = offline_dict_copy[hostname]
            if details.get('inspect_status') == 'Online':
                del self.offline_dict[hostname]

        filtered_offline = {
            hostname: details for hostname, details in offline_dict_copy.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'])
            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:
                            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_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")):
                self.set_row_color(row, QColor('lightyellow'))
            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):
        if hostname.startswith(("PTH11") or ("PTH15")):
            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):
        pygame.init()
        self.sound_queue = Queue()
        self.playing_lock = threading.Lock()
        self.thread = threading.Thread(target=self._play_sounds, daemon=True)
        self.thread.start()

    def _play_sounds(self):
        while True:
            sound_file = self.sound_queue.get()
            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)  # Wait until the sound finishes playing
                except Exception as e:
                    print(f"Error playing sound {sound_file}: {e}")
            self.sound_queue.task_done()

    def play(self, sound_file):
        self.sound_queue.put(sound_file)

    def stop(self):
        self.sound_queue.put(None)
        self.thread.join()
        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)
        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.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.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
        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)
        self.status_bar = QStatusBar(self)
        layout.addWidget(self.status_bar)
        self.table_widget = QTableWidget(self)
        self.table_widget.setEditTriggers(QAbstractItemView.NoEditTriggers)
        layout.addWidget(self.table_widget)
        self.setLayout(layout)
        font = QFont()
        font.setPointSize(12)
        self.table_widget.setFont(font)
        self.dataUpdated.connect(self.load_data)
        self.load_data()

        self.resizeEvent(None)

    def convert_to_seconds(self, duration):
        """ Convert duration from various formats to seconds. """
        try:
            # If the input is purely numeric, assume it's in minutes and convert to seconds
            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):
        file_path = 'history_online.txt'
        lock_path = 'history_online.lock'
        temp_file_path = 'history_online_temp.txt'
        lock = FileLock(lock_path)
        
        def is_older_than_180_days(date_str):
            date_format = "%Y-%m-%d"
            try:
                date = datetime.strptime(date_str, date_format)
                return date < datetime.now() - timedelta(days=180)
            except ValueError:
                return True

        try:
            with lock.acquire(timeout=5):  # Wait up to 5 seconds for the lock
                if not os.path.exists(file_path):
                    return

                # Clean up old data
                lines_before_cleanup = 0
                lines_after_cleanup = 0
                removed_dates = set()

                with open(file_path, 'r', encoding='utf-8') as file:
                    lines_before_cleanup = sum(1 for _ in file)
                
                with open(file_path, 'r', encoding='utf-8') as file, open(temp_file_path, 'w', encoding='utf-8') as temp_file:
                    for line in file:
                        parts = line.strip().split('|')
                        if len(parts) >= 11:
                            end_offline_str = f"{parts[6]} {parts[7]}"
                            end_offline_date = end_offline_str.split()[0]  # Extract just the date part (YYYY-MM-DD)
                            if is_older_than_180_days(end_offline_date):
                                removed_dates.add(end_offline_date)
                            else:
                                temp_file.write(line)
                                lines_after_cleanup += 1

                # Replace old file with cleaned file
                os.replace(temp_file_path, file_path)

                if lines_before_cleanup != lines_after_cleanup:
                    removed_dates = sorted(removed_dates)  # Sort dates for clarity
                    for date in removed_dates:
                        print(f"Removed date {date} : {lines_before_cleanup - lines_after_cleanup} lines of data older than 180 days.")

                start_date = self.start_date_edit.date().toString("yyyy-MM-dd")
                end_date = self.end_date_edit.date().toString("yyyy-MM-dd")
                status_filter = self.status_filter.currentText()
                hostname_filter = self.hostname_edit.text().strip()
                
                # 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)  # Assume user input is in minutes
                else:
                    duration_filter = None  # If invalid, don't filter on duration

                rows = []
                with open(file_path, 'r', encoding='utf-8') as file:
                    for line in file:
                        parts = line.strip().split('|')
                        if len(parts) >= 11:
                            end_offline_str = f"{parts[6]} {parts[7]}"
                            end_offline_date = end_offline_str.split()[0]  # Extract just the date part (YYYY-MM-DD)

                            # 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
                                    if hostname_filter == "" or hostname_filter.lower() in parts[2].lower():
                                        # Convert duration from the file to seconds for comparison
                                        try:
                                            duration = self.convert_to_seconds(parts[8])  # Extract duration from the line
                                        except ValueError:
                                            duration = None
                                        
                                        if duration_filter is None or (duration is not None and duration >= duration_filter):
                                            rows.append([parts[2], parts[3], f"{parts[4]} {parts[5]}", end_offline_str, parts[8], 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")

    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') 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]
                    store_name = parts[1]
                    telephone = parts[2]
                    wan_a = parts[3]
                    wan_b = parts[4]
                    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}")
    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

def tcp_socket(hostname, wan_a=None, wan_b=None, timeout=1):
    n = QTime.currentTime().toString("hh:mm:ss")
    inspect_status = ""
    try:
        with socket.create_connection((hostname, 80), timeout=timeout):
            inspect_status = "Server up"
            if hostname.startswith("PTH15067"): print(f"{n} Ping PTH15067")
            return True, inspect_status
    except (socket.timeout, ConnectionRefusedError, OSError):
        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 tcp_socket(hostname, wan_a=None, wan_b=None, timeout=1):
#     inspect_status = ""
#     try:
#         with socket.create_connection((hostname, 80), timeout=timeout):
#             inspect_status = "Server up"
#             return True, inspect_status
#     except (socket.timeout, ConnectionRefusedError, OSError):
#         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

def update_offline_list(queue, offline_dict, stop_event, update_signal, settings_widget):
    if stop_event is None:
        print("Stop event is None")
        return
    time.sleep(1)
    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:
                    log_online(hostname, store_name, offline_dict, normalized_hostname, inspect_status)
                    time.sleep(1)
                    threading.Thread(target=save_offline_state, args=('offline_state.json', offline_dict), daemon=True).start()
                    del offline_dict[normalized_hostname]
                    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)
                    update_signal.emit()
            elif not is_online and 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
                }
                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)
        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(1)

def log_online(hostname, store_name, offline_dict, normalized_hostname, inspect_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 is over 1 minute
        with open('history_online.txt', 'a', encoding='utf-8') as file:
            file.write(f"{online_date}|{online_time_str}|{hostname}|{store_name}|{start_date}|{start_time_str}|{online_date}|{online_time_str}|{duration_time}|{previous_status_str}|{comment}\n")

# def save_offline_state(file_path, offline_dict):
#     try:
#         normalized_dict = {k.upper(): v for k, v in offline_dict.items()}
#         with open(file_path, 'w', encoding='utf-8') as file:
#             json.dump(normalized_dict, file, ensure_ascii=False, indent=4)
#         #print(f"Offline state saved to '{file_path}'")
#     except Exception as e:
#         print(f"Error saving offline state to '{file_path}': {e}")

def save_offline_state(file_path, offline_dict):
    try:
        print("Saving offline state:")
        #print(offline_dict)  # Inspect the data being saved
        normalized_dict = {k.upper(): v for k, v in offline_dict.items()}
        with open(file_path, 'w', encoding='utf-8') as file:
            try:
                json.dump(normalized_dict, file, ensure_ascii=False, indent=4)
            except TypeError as e:
                print(f"Error serializing data to JSON: {e}")
        print(f"Offline state saved to '{file_path}'")
    except Exception as e:
        print(f"Error saving offline state to '{file_path}': {e}")

def load_offline_state(file_path):
    current_time = time.time()
    if os.path.exists(file_path):
        try:
            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)

def main():
    global MAX_PINGS, MAX_WORKERS
    
    app = QApplication(sys.argv)
    tab_widget = QTabWidget()
    
    # Main widget and layout setup
    main_widget = QWidget()
    main_layout = QVBoxLayout(main_widget)

    # Top-right layout for host label
    top_right_layout = QHBoxLayout()
    host_label = QLabel()
    host_label.setAlignment(Qt.AlignRight | Qt.AlignVCenter)
    host_label.setStyleSheet("font-size: 12pt; color: black; padding-right: 10px;")
    top_right_layout.addStretch()
    top_right_layout.addWidget(host_label)
    
    # Bottom-right layout for clock label
    bottom_right_layout = QHBoxLayout()
    clock_label = QLabel()
    clock_label.setAlignment(Qt.AlignRight | Qt.AlignVCenter)
    clock_label.setStyleSheet("font-size: 12pt;")
    bottom_right_layout.addStretch()
    bottom_right_layout.addWidget(clock_label)
    
    # Layout for the center widget
    center_layout = QVBoxLayout()
    center_layout.addWidget(tab_widget)
    
    # Create a duplicate overlay layout
    overlay_layout = QVBoxLayout()  # or QHBoxLayout() depending on your needs
    overlay_layout.addLayout(top_right_layout)
    overlay_layout.addLayout(center_layout)

    # Add the overlay layout to the main layout
    main_layout.addLayout(overlay_layout)
    main_layout.addLayout(bottom_right_layout)
    
    main_widget.setLayout(main_layout)
    main_widget.setWindowTitle("Server Monitor - Alert")
    main_widget.setGeometry(300, 300, 1100, 600)
    
    # Function to update labels
    def update_labels():
        current_time = QTime.currentTime().toString("hh:mm:ss")
        current_date = QDate.currentDate().toString("dd MMM yyyy")
        
        total_hosts = len(host_info_dict)
        #offline_hosts = len(offline_dict)
        offline_hosts = len([hostname for hostname, details in offline_dict.items() if details['inspect_status'] != 'Server up'])
        online_hosts = total_hosts - offline_hosts
        
        host_label.setText(f"Total: {total_hosts}   Offline: {offline_hosts}   Online: {online_hosts}")
        clock_label.setText(f"{current_date} - {current_time}")
    
    timer = QTimer()
    timer.timeout.connect(update_labels)
    timer.start(1000)  # Update every 1000ms (1 second)

    # Create tabs
    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")
    settings_widget = SettingsWidget(None, None, None, None, None, tab_widget, main_window)
    tab_widget.addTab(settings_widget, "Settings")
    main_window.settings_widget = settings_widget
    
    # Show main widget
    main_widget.show()
    
    # File handling and threading setup
    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()
    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 = Queue()
    stop_event = threading.Event()
    cpu_count = psutil.cpu_count(logical=True)
    memory = psutil.virtual_memory()
    available_memory_gb = memory.available / (1024 ** 3)
    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)
    
    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
    
    for hostname, (host, store_name, telephone, wan_a, wan_b) in host_info_dict.items():
        threading.Thread(
            target=monitor_host,
            args=((host, store_name, telephone, wan_a, wan_b), queue, offline_dict, stop_event, semaphore, settings_widget.main_window),
            daemon=True
        ).start()
    
    threading.Thread(
        target=update_offline_list,
        args=(queue, offline_dict, stop_event, return_online_signal, settings_widget),
        daemon=True
    ).start()
    
    app.aboutToQuit.connect(lambda: save_offline_state(offline_state_file, offline_dict))
    app.aboutToQuit.connect(main_window.stop_all_threads)
    
    sys.exit(app.exec_())

if __name__ == "__main__":
    main()

make check hostname