# -*- coding: utf-8 -*-
"""
/***************************************************************************
 Batch_Hillshader
                                 A QGIS plugin  to generate a three light
                                 exposure hillshade (shaded relief by
                                 combining three light exposures)

    For more information, see the program documentation.

    If you uses as input LiDAR data, note that plugin uses LASTools library.
        See LASTools License at  <https://rapidlasso.com/lastools/>

    Plugin also use in LiDAR data mode FUSION LDV.
        See FUSION LDV License at <http://forsys.cfr.washington.edu/fusion.html>
                              -------------------
        begin                : 2016-07-13
        git sha              : $Format:%H$
        copyright            : (C) 2017 by PANOimagen S.L.
        email                : info@panoimagen.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 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program.  If not, see <https://www.gnu.org/licenses/> *
 ***************************************************************************/
"""
from __future__ import unicode_literals

from PyQt4.QtCore import QSettings, QTranslator, qVersion, QCoreApplication
from PyQt4.QtGui import QAction, QIcon

import os.path
# Initialize Qt resources from file resources.py
import resources
# Import the code for the dialog
from batch_hillshader_dialog import batchHillshaderDialog
from dlgabout import DlgAbout

class batchHillshader:
    """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',
            'batch_hillshader_{}.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 = batchHillshaderDialog(iface)

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

    # 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('Batch Hillshader', 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):
        """Add a toolbar icon to the toolbar.

        :param icon_path: Path to the icon for this action. Can be a resource
            path (e.g. ':/plugins/foo/bar.png') or a normal file system path.
        :type icon_path: str

        :param text: Text that should be shown in menu items for this action.
        :type text: str

        :param callback: Function to be called when the action is triggered.
        :type callback: function

        :param enabled_flag: A flag indicating if the action should be enabled
            by default. Defaults to True.
        :type enabled_flag: bool

        :param add_to_menu: Flag indicating whether the action should also
            be added to the menu. Defaults to True.
        :type add_to_menu: bool

        :param add_to_toolbar: Flag indicating whether the action should also
            be added to the toolbar. Defaults to True.
        :type add_to_toolbar: bool

        :param status_tip: Optional text to show in a popup when mouse pointer
            hovers over the action.
        :type status_tip: str

        :param parent: Parent widget for the new action. Defaults None.
        :type parent: QWidget

        :param whats_this: Optional text to show in the status bar when the
            mouse pointer hovers over the action.

        :returns: The action that was created. Note that the action is also
            added to self.actions list.
        :rtype: QAction
        """

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

        aboutIcon = QIcon(':/plugins/batch_hillshader/icons/aboutIcon.png')
        self.actionAbout = QAction(aboutIcon, 'About', self.iface.mainWindow())
        self.actionAbout.triggered.connect(self.about)
        self.actionAbout.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.iface.addPluginToMenu(self.menu, self.actionAbout)

        self.actions.append(action)
        self.actions.append(self.actionAbout)

        return action

    def initGui(self):
        """Create the menu entries and toolbar icons inside the QGIS GUI."""
        icon_path = ':/plugins/batch_hillshader/icons/icon.png'
        self.add_action(
            icon_path,
            text=self.tr(u'Batch Hillshader'),
            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'&Batch Hillshader'),
                action)
            self.iface.removeToolBarIcon(action)
        # remove the toolbar
        del self.toolbar

    def run(self):
        """Run method that performs all the real work"""
        # show the dialog
        print("Run called")
        self.dlg.initLastoolsPathsUi()
        self.dlg.show()
        # Run the dialog event loop
        result = self.dlg.exec_()
        # See if OK was pressed
        if result:
            # Do something useful here - delete the line containing pass and
            # substitute with your code.
            pass

    def about(self):
        DlgAbout(self.iface.mainWindow()).exec_()
