# -*- coding: utf-8 -*-
"""
/***************************************************************************
 LandCoverReclassifier
                                 A QGIS plugin
 Reclassifies a raster to a UMEP land cover grid
                              -------------------
        begin                : 2015-07-13
        git sha              : $Format:%H$
        copyright            : (C) 2015 by Fredrik Lindberg
        email                : fredrikl@gvc.gu.se
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 __future__ import absolute_import
from builtins import str
from builtins import range
from builtins import object
from qgis.PyQt.QtCore import QSettings, QTranslator, qVersion, QCoreApplication
from qgis.PyQt.QtWidgets import QFileDialog, QAction, QMessageBox
from qgis.PyQt.QtGui import QIcon
from qgis.core import *
from qgis.gui import *
# Initialize Qt resources from file resources.py
# from . import resources_rc
# Import the code for the dialog
from .land_cover_reclassifier_dialog import LandCoverReclassifierDialog
import os.path
from ..Utilities.misc import *
import webbrowser

class LandCoverReclassifier(object):
    """QGIS Plugin Implementation."""

    def __init__(self, iface):
        """Constructor.

        :param iface: An interface instance that will be passed to this class
            which provides the hook by which you can manipulate the QGIS
            application at run time.
        :type iface: QgsInterface
        """
        # Save reference to the QGIS interface
        self.iface = iface
        # initialize plugin directory
        self.plugin_dir = os.path.dirname(__file__)
        # initialize locale
        locale = QSettings().value('locale/userLocale')[0:2]
        locale_path = os.path.join(
            self.plugin_dir,
            'i18n',
            'LandCoverReclassifier_{}.qm'.format(locale))

        if os.path.exists(locale_path):
            self.translator = QTranslator()
            self.translator.load(locale_path)

            if qVersion() > '4.3.3':
                QCoreApplication.installTranslator(self.translator)

        # Create the dialog (after translation) and keep reference
        self.dlg = LandCoverReclassifierDialog()
        self.dlg.runButton.clicked.connect(self.start_progress)
        self.dlg.pushButtonSave.clicked.connect(self.save_file_place)
        self.dlg.helpButton.clicked.connect(self.help)

        self.fileDialog = QFileDialog()
        # self.fileDialog.setFileMode(0)
        # self.fileDialog.setAcceptMode(1)  # Save
        self.fileDialog.setNameFilter("(*.tif *.tiff)")

        # Declare instance attributes
        self.actions = []
        self.menu = self.tr(u'&Land Cover Reclassifier')
        # TODO: We are going to let the user set this up in a future iteration
        # self.toolbar = self.iface.addToolBar(u'LandCoverReclassifier')
        # self.toolbar.setObjectName(u'LandCoverReclassifier')

        # self.layerComboManagerLCgrid = RasterLayerCombo(self.dlg.comboBox_lcgrid)
        # RasterLayerCombo(self.dlg.comboBox_lcgrid, initLayer="")
        self.layerComboManagerLCgrid = QgsMapLayerComboBox(self.dlg.widgetLCgrid)
        self.layerComboManagerLCgrid.setFilters(QgsMapLayerProxyModel.RasterLayer)
        self.layerComboManagerLCgrid.setFixedWidth(175)
        self.layerComboManagerLCgrid.setCurrentIndex(-1)

    # noinspection PyMethodMayBeStatic
    def tr(self, message):
        """Get the translation for a string using Qt translation API.

        We implement this ourselves since we do not inherit QObject.

        :param message: String for translation.
        :type message: str, QString

        :returns: Translated version of message.
        :rtype: QString
        """
        # noinspection PyTypeChecker,PyArgumentList,PyCallByClass
        return QCoreApplication.translate('LandCoverReclassifier', message)


    def add_action(
        self,
        icon_path,
        text,
        callback,
        enabled_flag=True,
        add_to_menu=True,
        add_to_toolbar=True,
        status_tip=None,
        whats_this=None,
        parent=None):

        icon = QIcon(icon_path)
        action = QAction(icon, text, parent)
        action.triggered.connect(callback)
        action.setEnabled(enabled_flag)

        if status_tip is not None:
            action.setStatusTip(status_tip)

        if whats_this is not None:
            action.setWhatsThis(whats_this)

        if add_to_toolbar:
            self.toolbar.addAction(action)

        if add_to_menu:
            self.iface.addPluginToMenu(
                self.menu,
                action)

        self.actions.append(action)

        return action

    def initGui(self):
        """Create the menu entries and toolbar icons inside the QGIS GUI."""

        icon_path = ':/plugins/LandCoverReclassifier/icon.png'
        self.add_action(
            icon_path,
            text=self.tr(u'Reclassifies a raster to a UMEP land cover grid'),
            callback=self.run,
            parent=self.iface.mainWindow())

    def unload(self):
        """Removes the plugin menu item and icon from QGIS GUI."""
        for action in self.actions:
            self.iface.removePluginMenu(
                self.tr(u'&Land Cover Reclassifier'),
                action)
            self.iface.removeToolBarIcon(action)
        # remove the toolbar
        del self.toolbar

    def save_file_place(self):
        self.fileDialog.open()
        result = self.fileDialog.exec_()
        # filename = QFileDialog.getSaveFileName(self.dlg, "Save as geotiff ", '*.tif')
        if result == 1:
            self.filePath = self.fileDialog.selectedFiles()
            self.filePath[0] = self.filePath[0] + '.tif'
            self.dlg.textOutput.setText(self.filePath[0])

    def start_progress(self):

        lc_grid = self.layerComboManagerLCgrid.currentLayer()
        if lc_grid is None:
            QMessageBox.critical(None, "Error", "No valid raster layer is selected")
            return

        if self.filePath == 'None':
            QMessageBox.critical(None, "Error", "Select a valid output folder")
            return

        # Reclass
        # self.dlg.pai_1_g.setInputMask("0.00")
        lc_type = np.zeros((14, 3))
        lc_type[0, 0] = float(self.dlg.Box_1.currentIndex())
        if lc_type[0, 0] > 0:
            lc_type[0, 1] = self.dlg.pai_1_g.text()
            lc_type[0, 2] = self.dlg.pai_1_s.text()
        lc_type[1, 0] = float(self.dlg.Box_2.currentIndex())
        if lc_type[1, 0] > 0:
            lc_type[1, 1] = self.dlg.pai_2_g.text()
            lc_type[1, 2] = self.dlg.pai_2_s.text()
        lc_type[2, 0] = float(self.dlg.Box_3.currentIndex())
        if lc_type[2, 0] > 0:
            lc_type[2, 1] = self.dlg.pai_3_g.text()
            lc_type[2, 2] = self.dlg.pai_3_s.text()
        lc_type[3, 0] = float(self.dlg.Box_4.currentIndex())
        if lc_type[3, 0] > 0:
            lc_type[3, 1] = self.dlg.pai_4_g.text()
            lc_type[3, 2] = self.dlg.pai_4_s.text()
        lc_type[4, 0] = float(self.dlg.Box_5.currentIndex())
        if lc_type[4, 0] > 0:
            lc_type[4, 1] = self.dlg.pai_5_g.text()
            lc_type[4, 2] = self.dlg.pai_5_s.text()
        lc_type[5, 0] = float(self.dlg.Box_6.currentIndex())
        if lc_type[5, 0] > 0:
            lc_type[5, 1] = self.dlg.pai_6_g.text()
            lc_type[5, 2] = self.dlg.pai_6_s.text()
        lc_type[6, 0] = float(self.dlg.Box_7.currentIndex())
        if lc_type[6, 0] > 0:
            lc_type[6, 1] = self.dlg.pai_7_g.text()
            lc_type[6, 2] = self.dlg.pai_7_s.text()

        lc_type[7, 0] = float(self.dlg.Box_8.currentIndex())
        if lc_type[7, 0] > 0:
            lc_type[7, 1] = self.dlg.pai_8_g.text()
            lc_type[7, 2] = self.dlg.pai_8_s.text()
        lc_type[8, 0] = float(self.dlg.Box_9.currentIndex())
        if lc_type[8, 0] > 0:
            lc_type[8, 1] = self.dlg.pai_9_g.text()
            lc_type[8, 2] = self.dlg.pai_9_s.text()
        lc_type[9, 0] = float(self.dlg.Box_10.currentIndex())
        if lc_type[9, 0] > 0:
            lc_type[9, 1] = self.dlg.pai_10_g.text()
            lc_type[9, 2] = self.dlg.pai_10_s.text()
        lc_type[10, 0] = float(self.dlg.Box_11.currentIndex())
        if lc_type[10, 0] > 0:
            lc_type[10, 1] = self.dlg.pai_11_g.text()
            lc_type[10, 2] = self.dlg.pai_11_s.text()
        lc_type[11, 0] = float(self.dlg.Box_12.currentIndex())
        if lc_type[11, 0] > 0:
            lc_type[11, 1] = self.dlg.pai_12_g.text()
            lc_type[11, 2] = self.dlg.pai_12_s.text()
        lc_type[12, 0] = float(self.dlg.Box_13.currentIndex())
        if lc_type[12, 0] > 0:
            lc_type[12, 1] = self.dlg.pai_13_g.text()
            lc_type[12, 2] = self.dlg.pai_13_s.text()
        lc_type[13, 0] = float(self.dlg.Box_14.currentIndex())
        if lc_type[13, 0] > 0:
            lc_type[13, 1] = self.dlg.pai_14_g.text()
            lc_type[13, 2] = self.dlg.pai_14_s.text()

        provider = lc_grid.dataProvider()
        filepath_lc_grid= str(provider.dataSourceUri())
        gdal_lc_grid = gdal.Open(filepath_lc_grid)

        lc_grid = gdal_lc_grid.ReadAsArray().astype(np.float)
        sizex = lc_grid.shape[0]
        sizey = lc_grid.shape[1]
        lc_grid_rc = np.zeros((sizex, sizey))

        # populating new grid with values
        for i in range(lc_type.shape[0]):
            lc_grid_rc[np.where((lc_grid > lc_type[i, 1]) & (lc_grid <= lc_type[i, 2]))] = lc_type[i, 0]

        filename = self.filePath[0]
        saveraster(gdal_lc_grid, filename, lc_grid_rc)

        # load result into canvas
        rlayer = self.iface.addRasterLayer(filename)

        # This is not working, yet... almost now. only now showing names in layer window
        rlayer.loadNamedStyle(self.plugin_dir + '/landcoverstyle.qml')
        # self.QgsMapLayerRegistry.instance().addMapLayer(rlayer)

        # Trigger a repaint
        if hasattr(rlayer, "setCacheImage"):
            rlayer.setCacheImage(None)
        rlayer.triggerRepaint()

    def run(self):
        self.dlg.show()
        self.dlg.exec_()

    def help(self):
        url = 'https://umep-docs.readthedocs.io/en/latest/pre-processor/Urban%20Land%20Cover%20Land%20Cover%20Reclassifier.html'
        webbrowser.open_new_tab(url)

