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

"""
***************************************************************************
    GdalAlgorithmDialog.py
    ---------------------
    Date                 : May 2015
    Copyright            : (C) 2015 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__ = 'May 2015'
__copyright__ = '(C) 2015, Victor Olaya'

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

__revision__ = '$Format:%H$'

from qgis.core import *
from PyQt4.QtGui import *
from processing.gui.AlgorithmDialog import AlgorithmDialog
from processing.gui.AlgorithmDialogBase import AlgorithmDialogBase
from processing.gui.ParametersPanel import ParametersPanel
from processing.gui.MultipleInputPanel import MultipleInputPanel
from processing.gui.NumberInputPanel import NumberInputPanel


class GdalAlgorithmDialog(AlgorithmDialog):

    def __init__(self, alg):
        AlgorithmDialogBase.__init__(self, alg)

        self.alg = alg

        self.mainWidget = GdalParametersPanel(self, alg)
        self.setMainWidget()

        cornerWidget = QWidget()
        layout = QVBoxLayout()
        layout.setContentsMargins(0, 0, 0, 5)
        self.tabWidget.setStyleSheet("QTabBar::tab { height: 30px; }")
        runAsBatchButton = QPushButton(self.tr("Run as batch process..."))
        runAsBatchButton.clicked.connect(self.runAsBatch)
        layout.addWidget(runAsBatchButton)
        cornerWidget.setLayout(layout)
        self.tabWidget.setCornerWidget(cornerWidget)

        self.mainWidget.parametersHaveChanged()

        QgsMapLayerRegistry.instance().layerWasAdded.connect(self.mainWidget.layerAdded)
        QgsMapLayerRegistry.instance().layersWillBeRemoved.connect(self.mainWidget.layersWillBeRemoved)


class GdalParametersPanel(ParametersPanel):

    def __init__(self, parent, alg):
        ParametersPanel.__init__(self, parent, alg)

        w = QWidget()
        layout = QVBoxLayout()
        layout.setMargin(0)
        layout.setSpacing(6)
        label = QLabel()
        label.setText(self.tr("GDAL/OGR console call"))
        layout.addWidget(label)
        self.text = QPlainTextEdit()
        self.text.setReadOnly(True)
        layout.addWidget(self.text)
        w.setLayout(layout)
        self.layoutMain.addWidget(w)

        self.connectParameterSignals()
        self.parametersHaveChanged()

    def connectParameterSignals(self):
        for w in self.widgets.values():
            if isinstance(w, QLineEdit):
                w.textChanged.connect(self.parametersHaveChanged)
            elif isinstance(w, QComboBox):
                w.currentIndexChanged.connect(self.parametersHaveChanged)
            elif isinstance(w, QCheckBox):
                w.stateChanged.connect(self.parametersHaveChanged)
            elif isinstance(w, MultipleInputPanel):
                w.selectionChanged.connect(self.parametersHaveChanged)
            elif isinstance(w, NumberInputPanel):
                w.hasChanged.connect(self.parametersHaveChanged)

    def parametersHaveChanged(self):
        try:
            self.parent.setParamValues()
            for output in self.alg.outputs:
                if output.value is None:
                    output.value = self.tr("[temporary file]")
            commands = self.alg.getConsoleCommands()
            commands = [c for c in commands if c not in ['cmd.exe', '/C ']]
            self.text.setPlainText(" ".join(commands))
        except AlgorithmDialogBase.InvalidParameterValue as e:
            self.text.setPlainText(self.tr("Invalid value for parameter '%s'") % e.parameter.description)
        except:
            self.text.setPlainText("")
