# -*- coding: utf-8 -*-

"""
***************************************************************************
    AlgorithmDialogBase.py
    ---------------------
    Date                 : August 2012
    Copyright            : (C) 2012 by Victor Olaya
    Email                : volayaf at gmail dot com
***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
***************************************************************************
"""

__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os
import webbrowser

from PyQt4 import uic
from PyQt4.QtCore import QCoreApplication, QSettings, QByteArray, SIGNAL, QUrl
from PyQt4.QtGui import QApplication, QDialogButtonBox, QDesktopWidget

from qgis.utils import iface
from qgis.core import *

from processing.core.ProcessingConfig import ProcessingConfig
from processing.gui import AlgorithmClassification

pluginPath = os.path.split(os.path.dirname(__file__))[0]
WIDGET, BASE = uic.loadUiType(
    os.path.join(pluginPath, 'ui', 'DlgAlgorithmBase.ui'))


class AlgorithmDialogBase(BASE, WIDGET):

    class InvalidParameterValue(Exception):

        def __init__(self, param, widget):
            (self.parameter, self.widget) = (param, widget)

    def __init__(self, alg):
        super(AlgorithmDialogBase, self).__init__(iface.mainWindow())
        self.setupUi(self)

        self.settings = QSettings()
        self.restoreGeometry(self.settings.value("/Processing/dialogBase", QByteArray()))

        self.executed = False
        self.mainWidget = None
        self.alg = alg

        # Rename OK button to Run
        self.btnRun = self.buttonBox.button(QDialogButtonBox.Ok)
        self.btnRun.setText(self.tr('Run'))

        self.btnClose = self.buttonBox.button(QDialogButtonBox.Close)

        self.setWindowTitle(AlgorithmClassification.getDisplayName(self.alg))

        desktop = QDesktopWidget()
        if desktop.physicalDpiX() > 96:
            self.textHelp.setZoomFactor(desktop.physicalDpiX() / 96)

        algHelp = self.alg.shortHelp()
        if algHelp is None:
            self.textShortHelp.setVisible(False)
        else:
            self.textShortHelp.document().setDefaultStyleSheet('''.summary { margin-left: 10px; margin-right: 10px; }
                                                    h2 { color: #555555; padding-bottom: 15px; }
                                                    a { text-decoration: none; color: #3498db; font-weight: bold; }
                                                    p { color: #666666; }
                                                    b { color: #333333; }
                                                    dl dd { margin-bottom: 5px; }''')
            self.textShortHelp.setHtml(algHelp)

        self.textShortHelp.setOpenLinks(False)

        def linkClicked(url):
            webbrowser.open(url.toString())
        self.textShortHelp.connect(self.textShortHelp, SIGNAL("anchorClicked(const QUrl&)"), linkClicked)

        self.textHelp.page().setNetworkAccessManager(QgsNetworkAccessManager.instance())

        isText, algHelp = self.alg.help()
        if algHelp is not None:
            algHelp = algHelp if isText else QUrl(algHelp)
            try:
                if isText:
                    self.textHelp.setHtml(algHelp)
                else:
                    self.textHelp.settings().clearMemoryCaches()
                    self.textHelp.load(algHelp)
            except:
                self.tabWidget.removeTab(2)
        else:
            self.tabWidget.removeTab(2)

        self.showDebug = ProcessingConfig.getSetting(
            ProcessingConfig.SHOW_DEBUG_IN_DIALOG)

    def closeEvent(self, evt):
        self.settings.setValue("/Processing/dialogBase", self.saveGeometry())
        super(AlgorithmDialogBase, self).closeEvent(evt)

    def setMainWidget(self):
        self.tabWidget.widget(0).layout().addWidget(self.mainWidget)

    def error(self, msg):
        QApplication.restoreOverrideCursor()
        self.setInfo(msg, True)
        self.resetGUI()
        self.tabWidget.setCurrentIndex(1)

    def resetGUI(self):
        QApplication.restoreOverrideCursor()
        self.lblProgress.setText('')
        self.progressBar.setMaximum(100)
        self.progressBar.setValue(0)
        self.btnRun.setEnabled(True)
        self.btnClose.setEnabled(True)

    def setInfo(self, msg, error=False):
        if error:
            self.txtLog.append('<span style="color:red"><br>%s<br></span>' % msg)
        else:
            self.txtLog.append(msg)
        QCoreApplication.processEvents()

    def setCommand(self, cmd):
        if self.showDebug:
            self.setInfo('<code>%s<code>' % cmd)
        QCoreApplication.processEvents()

    def setDebugInfo(self, msg):
        if self.showDebug:
            self.setInfo('<span style="color:blue">%s</span>' % msg)
        QCoreApplication.processEvents()

    def setConsoleInfo(self, msg):
        if self.showDebug:
            self.setCommand('<span style="color:darkgray">%s</span>' % msg)
        QCoreApplication.processEvents()

    def setPercentage(self, value):
        if self.progressBar.maximum() == 0:
            self.progressBar.setMaximum(100)
        self.progressBar.setValue(value)
        QCoreApplication.processEvents()

    def setText(self, text):
        self.lblProgress.setText(text)
        self.setInfo(text, False)
        QCoreApplication.processEvents()

    def setParamValues(self):
        pass

    def setParamValue(self, param, widget, alg=None):
        pass

    def accept(self):
        pass

    def finish(self):
        pass
