"""
***************************************************************************
    MultipleExternalInputDialog.py
    ---------------------
    Date                 : August 2012
    Copyright            : (C) 2012 by Victor Olaya
                           (C) 2013 by CS Systemes d'information (CS SI)
    Email                : volayaf at gmail dot com
                           otb at c-s dot fr (CS SI)
    Contributors         : Victor Olaya  - basis from MultipleInputDialog
                           Alexia Mondot (CS SI) - new parameter
***************************************************************************
*                                                                         *
*   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'

import os
import warnings

from qgis.core import QgsSettings
from qgis.PyQt import uic
from qgis.PyQt.QtCore import QByteArray
from qgis.PyQt.QtWidgets import QDialog, QAbstractItemView, QPushButton, QDialogButtonBox, QFileDialog
from qgis.PyQt.QtGui import QStandardItemModel, QStandardItem

pluginPath = os.path.split(os.path.dirname(__file__))[0]

with warnings.catch_warnings():
    warnings.filterwarnings("ignore", category=DeprecationWarning)
    WIDGET, BASE = uic.loadUiType(
        os.path.join(pluginPath, 'ui', 'DlgMultipleSelection.ui'))


class MultipleFileInputDialog(BASE, WIDGET):

    def __init__(self, options):
        super().__init__(None)
        self.setupUi(self)

        self.lstLayers.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)

        self.selectedoptions = options

        # Additional buttons
        self.btnAdd = QPushButton(self.tr('Add file'))
        self.buttonBox.addButton(self.btnAdd,
                                 QDialogButtonBox.ButtonRole.ActionRole)
        self.btnRemove = QPushButton(self.tr('Remove file(s)'))
        self.buttonBox.addButton(self.btnRemove,
                                 QDialogButtonBox.ButtonRole.ActionRole)
        self.btnRemoveAll = QPushButton(self.tr('Remove all'))
        self.buttonBox.addButton(self.btnRemoveAll,
                                 QDialogButtonBox.ButtonRole.ActionRole)

        self.btnAdd.clicked.connect(self.addFile)
        self.btnRemove.clicked.connect(lambda: self.removeRows())
        self.btnRemoveAll.clicked.connect(lambda: self.removeRows(True))

        self.settings = QgsSettings()
        self.restoreGeometry(self.settings.value("/Processing/multipleFileInputDialogGeometry", QByteArray()))

        self.populateList()
        self.finished.connect(self.saveWindowGeometry)

    def saveWindowGeometry(self):
        self.settings.setValue("/Processing/multipleInputDialogGeometry", self.saveGeometry())

    def populateList(self):
        model = QStandardItemModel()
        for option in self.selectedoptions:
            item = QStandardItem(option)
            model.appendRow(item)

        self.lstLayers.setModel(model)

    def accept(self):
        self.selectedoptions = []
        model = self.lstLayers.model()
        for i in range(model.rowCount()):
            item = model.item(i)
            self.selectedoptions.append(item.text())
        QDialog.accept(self)

    def reject(self):
        QDialog.reject(self)

    def addFile(self):
        settings = QgsSettings()
        if settings.contains('/Processing/LastInputPath'):
            path = settings.value('/Processing/LastInputPath')
        else:
            path = ''

        files, selected_filter = QFileDialog.getOpenFileNames(self,
                                                              self.tr('Select File(s)'), path, self.tr('All files (*.*)'))

        if len(files) == 0:
            return

        model = self.lstLayers.model()
        for filePath in files:
            item = QStandardItem(filePath)
            model.appendRow(item)

        settings.setValue('/Processing/LastInputPath',
                          os.path.dirname(files[0]))

    def removeRows(self, removeAll=False):
        if removeAll:
            self.lstLayers.model().clear()
        else:
            self.lstLayers.setUpdatesEnabled(False)
            indexes = sorted(self.lstLayers.selectionModel().selectedIndexes())
            for i in reversed(indexes):
                self.lstLayers.model().removeRow(i.row())
            self.lstLayers.setUpdatesEnabled(True)
