# -*- coding: utf-8 -*-
"""
/***************************************************************************
 DsgTools
                                 A QGIS plugin
 Brazilian Army Cartographic Production Tools
                              -------------------
        begin                : 2016-07-16
        git sha              : $Format:%H$
        copyright            : (C) 2016 by Philipe Borba - Cartographic Engineer @ Brazilian Army
        email                : borba.philipe@eb.mil.br
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
"""
from builtins import range
import os

from processing.modeler.ModelerUtils import ModelerUtils
from qgis.PyQt import uic
from qgis.PyQt.QtCore import pyqtSlot, Qt, QSettings
from qgis.PyQt.QtWidgets import QMessageBox, QDialog, QFileDialog


FORM_CLASS, _ = uic.loadUiType(os.path.join(os.path.dirname(__file__), "options.ui"))


class Options(QDialog, FORM_CLASS):
    __dsgToolsModelPath__ = os.path.abspath(
        os.path.join(
            os.path.dirname(__file__), "..", "..", "..", "core", "Misc", "QGIS_Models"
        )
    )
    __qgisModelPath__ = ModelerUtils.modelsFolders()[0]

    # # some options signals
    # modelPathChanged = pyqtSignal()

    def __init__(self, parent=None):
        """Constructor."""
        super(Options, self).__init__(parent)
        self.setupUi(self)
        self.setInterfaceWithParametersFromConfig()
        self.setupValidationToolbarConfig()
        # project option still not implemented
        self.removeModelsProjectCheckBox.hide()

    @pyqtSlot(bool)
    def on_addPushButton_clicked(self):
        newValue = self.addParameterLineEdit.text()
        valueList = [
            self.blackListWidget.item(i).text()
            for i in range(self.blackListWidget.count())
        ]
        if newValue == "":
            QMessageBox.warning(
                self, self.tr("Warning!"), self.tr("Fill in a value before adding!")
            )
            return
        if newValue in valueList:
            QMessageBox.warning(
                self, self.tr("Warning!"), self.tr("Value already in black list!")
            )
            return
        self.blackListWidget.addItem(newValue)
        self.blackListWidget.sortItems(order=Qt.AscendingOrder)
        self.addParameterLineEdit.setText("")

    @pyqtSlot(bool)
    def on_addCentroidFlagPushButton_clicked(self):
        """
        Adds a new value to the centroid flag black list.
        """
        newValue = self.addCentroidFlagParameterLineEdit.text()
        valueList = [
            self.centroidFlagBlackListWidget.item(i).text()
            for i in range(self.centroidFlagBlackListWidget.count())
        ]
        if newValue == "":
            QMessageBox.warning(
                self, self.tr("Warning!"), self.tr("Fill in a value before adding!")
            )
            return
        if newValue in valueList:
            QMessageBox.warning(
                self, self.tr("Warning!"), self.tr("Value already in black list!")
            )
            return
        self.centroidFlagBlackListWidget.addItem(newValue)
        self.centroidFlagBlackListWidget.sortItems(order=Qt.AscendingOrder)
        self.addCentroidFlagParameterLineEdit.setText("")

    def getParameters(self):
        freeHandTolerance = self.toleranceQgsDoubleSpinBox.value()
        freeHandSmoothIterations = self.smoothIterationsQgsSpinBox.value()
        freeHandSmoothOffset = self.smoothOffsetQgsDoubleSpinBox.value()
        algIterations = self.algIterationsQgsSpinBox.value()
        minSegmentDistance = self.minSegmentDistanceQgsSpinBox.value()
        rightAngleDecimals = self.rightAngleDecimalsQgsSpinBox.value()
        valueList = [
            self.blackListWidget.item(i).text()
            for i in range(self.blackListWidget.count())
        ]
        undoPoints = self.undoQgsSpinBox.value()
        decimals = self.decimalQgsSpinBox.value()
        freeHandFinalSimplifyTolerance = self.finalToleranceQgsDoubleSpinBox.value()
        centroidFlagValueList = [
            self.centroidFlagBlackListWidget.item(i).text()
            for i in range(self.centroidFlagBlackListWidget.count())
        ]
        return (
            freeHandTolerance,
            freeHandSmoothIterations,
            freeHandSmoothOffset,
            algIterations,
            minSegmentDistance,
            rightAngleDecimals,
            valueList,
            undoPoints,
            decimals,
            freeHandFinalSimplifyTolerance,
            centroidFlagValueList,
        )

    def loadParametersFromConfig(self):
        settings = QSettings()
        settings.beginGroup("PythonPlugins/DsgTools/Options")
        freeHandTolerance = settings.value("freeHandTolerance")
        freeHandSmoothIterations = settings.value("freeHandSmoothIterations")
        freeHandSmoothOffset = settings.value("freeHandSmoothOffset")
        algIterations = settings.value("algIterations")
        minSegmentDistance = settings.value("minSegmentDistance")
        rightAngleDecimals = settings.value("rightAngleDecimals")
        valueList = settings.value("valueList")
        undoPoints = settings.value("undoPoints")
        decimals = settings.value("decimals")
        freeHandFinalSimplifyTolerance = settings.value(
            "freeHandFinalSimplifyTolerance"
        )
        centroidFlagValueList = settings.value("centroidFlagValueList")
        if valueList:
            valueList = valueList.split(";")
        if centroidFlagValueList:
            centroidFlagValueList = centroidFlagValueList.split(";")
        settings.endGroup()
        return (
            freeHandTolerance,
            freeHandSmoothIterations,
            freeHandSmoothOffset,
            algIterations,
            minSegmentDistance,
            rightAngleDecimals,
            valueList,
            undoPoints,
            decimals,
            freeHandFinalSimplifyTolerance,
            centroidFlagValueList,
        )

    def setInterfaceWithParametersFromConfig(self):
        (
            freeHandTolerance,
            freeHandSmoothIterations,
            freeHandSmoothOffset,
            algIterations,
            minSegmentDistance,
            rightAngleDecimals,
            valueList,
            undoPoints,
            decimals,
            freeHandFinalSimplifyTolerance,
            centroidFlagValueList,
        ) = self.loadParametersFromConfig()
        if freeHandTolerance:
            self.toleranceQgsDoubleSpinBox.setValue(float(freeHandTolerance))
        if freeHandSmoothIterations:
            self.smoothIterationsQgsSpinBox.setValue(int(freeHandSmoothIterations))
        if freeHandSmoothOffset:
            self.smoothOffsetQgsDoubleSpinBox.setValue(float(freeHandSmoothOffset))
        if algIterations:
            self.algIterationsQgsSpinBox.setValue(int(algIterations))
        if minSegmentDistance:
            self.minSegmentDistanceQgsSpinBox.setValue(float(minSegmentDistance))
        if rightAngleDecimals:
            self.rightAngleDecimalsQgsSpinBox.setValue(int(rightAngleDecimals))
        if valueList:
            self.blackListWidget.clear()
            self.blackListWidget.addItems(valueList)
            self.blackListWidget.sortItems(order=Qt.AscendingOrder)
        if undoPoints:
            self.undoQgsSpinBox.setValue(int(undoPoints))
        if decimals:
            self.decimalQgsSpinBox.setValue(int(decimals))
        if freeHandFinalSimplifyTolerance:
            self.finalToleranceQgsDoubleSpinBox.setValue(
                float(freeHandFinalSimplifyTolerance)
            )
        if centroidFlagValueList:
            self.centroidFlagBlackListWidget.clear()
            self.centroidFlagBlackListWidget.addItems(centroidFlagValueList)
            self.centroidFlagBlackListWidget.sortItems(order=Qt.AscendingOrder)

    def storeParametersInConfig(self):
        (
            freeHandTolerance,
            freeHandSmoothIterations,
            freeHandSmoothOffset,
            algIterations,
            minSegmentDistance,
            rightAngleDecimals,
            valueList,
            undoPoints,
            decimals,
            freeHandFinalSimplifyTolerance,
            centroidFlagValueList,
        ) = self.getParameters()
        settings = QSettings()
        settings.beginGroup("PythonPlugins/DsgTools/Options")
        settings.setValue("freeHandTolerance", freeHandTolerance)
        settings.setValue("freeHandSmoothIterations", freeHandSmoothIterations)
        settings.setValue("freeHandSmoothOffset", freeHandSmoothOffset)
        settings.setValue("algIterations", algIterations)
        settings.setValue("minSegmentDistance", minSegmentDistance)
        settings.setValue("rightAngleDecimals", rightAngleDecimals)
        settings.setValue("valueList", ";".join(valueList))
        settings.setValue("undoPoints", undoPoints)
        settings.setValue("decimals", decimals)
        settings.setValue(
            "freeHandFinalSimplifyTolerance", freeHandFinalSimplifyTolerance
        )
        settings.setValue("centroidFlagValueList", ";".join(centroidFlagValueList))
        settings.endGroup()

    @pyqtSlot()
    def on_buttonBox_accepted(self):
        self.storeParametersInConfig()
        self.updateValidationToolbarConfig()
        self.close()

    @pyqtSlot(bool)
    def on_removePushButton_clicked(self):
        selectedItems = self.blackListWidget.selectedItems()
        idxList = []
        for i in range(self.blackListWidget.count()):
            if self.blackListWidget.item(i) in selectedItems:
                idxList.append(i)
        idxList.sort(reverse=True)
        for i in idxList:
            self.blackListWidget.takeItem(i)

    @pyqtSlot(bool)
    def on_removeCentroidFlagPushButton_clicked(self):
        """
        Removes selected values from the centroid flag black list.
        """
        selectedItems = self.centroidFlagBlackListWidget.selectedItems()
        idxList = []
        for i in range(self.centroidFlagBlackListWidget.count()):
            if self.centroidFlagBlackListWidget.item(i) in selectedItems:
                idxList.append(i)
        idxList.sort(reverse=True)
        for i in idxList:
            self.centroidFlagBlackListWidget.takeItem(i)

    def firstTimeConfig(self):
        (
            freeHandTolerance,
            freeHandSmoothIterations,
            freeHandSmoothOffset,
            algIterations,
            minSegmentDistance,
            rightAngleDecimals,
            valueList,
            undoPoints,
            decimals,
            freeHandFinalSimplifyTolerance,
            centroidFlagValueList,
        ) = self.loadParametersFromConfig()
        if not (
            freeHandTolerance
            and freeHandSmoothIterations
            and freeHandSmoothOffset
            and algIterations
            and valueList
            and undoPoints
            and decimals is not None
            and freeHandFinalSimplifyTolerance is not None
            and centroidFlagValueList
        ):
            self.storeParametersInConfig()

    def setupModelPath(self):
        """
        Clears all model paths and leaves the default options.
        """
        self.modelPathComboBox.clear()
        self.modelPathComboBox.addItems(
            [self.__dsgToolsModelPath__, self.__qgisModelPath__]
        )

    def setupValidationToolbarConfig(self):
        """
        Sets up Validation Toolbar parameters to DSGTools default values.
        """
        # reset combo box to default as well
        self.setupModelPath()
        settings = QSettings()
        settings.beginGroup("PythonPlugins/DsgTools/Options")
        if settings.value("loadModelOutput") is None:
            settings.setValue("loadModelOutput", True)
        self.loadModelOutputCheckBox.setChecked(
            settings.value("loadModelOutput") in (True, "true")
        )
        if settings.value("checkBeforeRunModel") is None:
            settings.setValue("checkBeforeRunModel", True)
        self.checkBeforeRunModelCheckBox.setChecked(
            settings.value("checkBeforeRunModel") in (True, "true")
        )
        if settings.value("removeModelsOnExit") is None:
            settings.setValue("", False)
        self.resetModelsCheckBox.setChecked(
            settings.value("removeModelsOnExit") in (True, "true")
        )
        if settings.value("removeModelsOnNewProject") is None:
            settings.setValue("removeModelsOnNewProject", False)
        self.removeModelsProjectCheckBox.setChecked(
            settings.value("removeModelsOnNewProject") in (True, "true")
        )
        if settings.value("defaultModelPath") is None:
            settings.setValue("defaultModelPath", self.modelPathComboBox.currentText())
        idx = self.modelPathComboBox.findText(settings.value("defaultModelPath"))
        if idx < 0:
            self.modelPathComboBox.addItem(settings.value("defaultModelPath"))
        self.modelPathComboBox.setCurrentText(settings.value("defaultModelPath"))
        settings.endGroup()

    def validationToolbarConfig(self):
        """
        Reads all parameters for Validation Toolbar.
        :return: (dict) set of parameters for Validation Toolbar.
        """
        settings = QSettings()
        settings.beginGroup("PythonPlugins/DsgTools/Options")
        loadModelOutput = settings.value("loadModelOutput")
        checkBeforeRunModel = settings.value("checkBeforeRunModel")
        removeModelsOnExit = settings.value("removeModelsOnExit")
        removeModelsOnNewProject = settings.value("removeModelsOnNewProject")
        defaultModelPath = settings.value("defaultModelPath")
        settings.endGroup()
        return {
            "loadModelOutput": loadModelOutput in (True, "true"),
            "checkBeforeRunModel": checkBeforeRunModel in (True, "true"),
            "removeModelsOnExit": removeModelsOnExit in (True, "true"),
            "removeModelsOnNewProject": removeModelsOnNewProject in (True, "true"),
            "defaultModelPath": defaultModelPath,
        }

    def updateValidationToolbarConfig(self):
        """
        Updates current Validation Toolbar parameter values from GUI.
        """
        settings = QSettings()
        settings.beginGroup("PythonPlugins/DsgTools/Options")
        settings.setValue("loadModelOutput", self.loadModelOutputCheckBox.isChecked())
        settings.setValue(
            "checkBeforeRunModel", self.checkBeforeRunModelCheckBox.isChecked()
        )
        settings.setValue("removeModelsOnExit", self.resetModelsCheckBox.isChecked())
        settings.setValue(
            "removeModelsOnNewProject", self.removeModelsProjectCheckBox.isChecked()
        )
        # oldModelPath = settings.value('defaultModelPath')
        # newModelPath = self.modelPathComboBox.currentText()
        settings.setValue("defaultModelPath", self.modelPathComboBox.currentText())
        settings.endGroup()
        # if oldModelPath != newModelPath:
        #     self.modelPathChanged.emit()

    def addNewModelPath(self, modelPath, setAsDefault=True):
        """
        Adds a custom model path as an option.
        :param modelPath: (str) path to look for QGIS Processing models.
        :param setAsDefault: (bool) whether current selection should be updated to new model path.
        :return: (int) index for new model path on its selection combo box.
        """
        if (
            not os.path.exists(modelPath)
            or self.modelPathComboBox.findText(modelPath) >= 0
        ):
            return -1
        self.modelPathComboBox.addItem(modelPath)
        idx = self.modelPathComboBox.findText(modelPath)
        if setAsDefault:
            self.modelPathComboBox.setCurrentIndex(idx)
        return idx

    @pyqtSlot(bool, name="on_addModelPathPushButton_clicked")
    def setCustomModelPath(self):
        """
        Adds a custom model path and sets it as default.
        """
        fd = QFileDialog()
        newModelPath = fd.getExistingDirectory(
            caption=self.tr(
                "Select a directory for DSGTools Validation"
                " Toolbar to look for QGIS Processing models"
            )
        )
        newModelPath = (
            newModelPath[0] if isinstance(newModelPath, tuple) else newModelPath
        )
        if not newModelPath:
            return
        self.addNewModelPath(newModelPath)
