# -*- coding: utf-8 -*-
"""
/***************************************************************************
                              EO Time Series Viewer
                              -------------------
        begin                : 2015-08-20
        git sha              : $Format:%H$
        copyright            : (C) 2017 by HU-Berlin
        email                : benjamin.jakimow@geo.hu-berlin.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
"""
# noinspection PyPep8Naming

import os
import sys
import re
import io
import shutil
import importlib
import uuid
import warnings
import pathlib
import sip
from qgis.core import QgsApplication, QgsProcessingAlgorithm, \
    QgsProcessingParameterRasterDestination, QgsProcessingParameterNumber, \
    QgsProcessingContext, QgsProcessingFeedback, QgsProcessingParameterRasterLayer, \
    QgsPythonRunner, QgsProcessingAlgorithm
from qgis.gui import QgsPluginManagerInterface
from qgis.PyQt.QtCore import *
from qgis.PyQt.QtGui import *
from qgis.PyQt.QtWidgets import *
from .externals.qps.testing import TestObjects, WFS_Berlin, WMS_GMAPS, WMS_OSM, TestCase, QgisMockup, StartOptions
import qgis.utils
import numpy as np
from osgeo import gdal, ogr, osr

from enmapbox.gui.utils import file_search
from enmapbox import DIR_TESTDATA

SHOW_GUI = True


def start_app(*args, loadProcessingFramework: bool = True, **kwds) -> QgsApplication:
    """
    Initializes a QGIS Environment
    :return: QgsApplication instance of local QGIS installation
    """
    if isinstance(QgsApplication.instance(), QgsApplication):
        return QgsApplication.instance()
    else:
        from .externals.qps.testing import start_app, StartOptions
        app = start_app(*args, options=StartOptions.All, **kwds)

        import enmapbox
        enmapbox.initEnMAPBoxResources()
        if loadProcessingFramework:
            enmapbox.registerEnMAPBoxProcessingProvider()
        enmapbox.registerEditorWidgets()
        enmapbox.registerExpressionFunctions()
        enmapbox.registerMapLayerConfigWidgetFactories()
        return app


initQgisApplication = start_app


class EnMAPBoxTestCase(TestCase):
    @classmethod
    def setUpClass(cls, resources=[]):
        tmpDir = cls.tempDir(cls, subdir=cls.__name__)
        os.chdir(tmpDir)
        super().setUpClass(resources=resources)

        import enmapbox
        enmapbox.initAll()

        s = ""

    def tempDir(self, subdir: str = None, cleanup: bool = False) -> pathlib.Path:
        """
        Returns the <enmapbox-repository/test-outputs> directory
        :param subdir:
        :param cleanup:
        :return: pathlib.Path
        """
        from enmapbox import DIR_REPO
        p = pathlib.Path(DIR_REPO) / 'test-outputs'
        if isinstance(subdir, str):
            p = p / subdir
        if p.exists() and p.is_dir():
            shutil.rmtree(p)
        os.makedirs(p, exist_ok=True)
        return p


class TestObjects(TestObjects):
    """
    Creates objects to be used for testing. It is preferred to generate objects in-memory.
    """

    @staticmethod
    def uriWMS() -> str:
        return r'crs=EPSG:3857&format&type=xyz&url=https://mt1.google.com/vt/lyrs%3Ds%26x%3D%7Bx%7D%26y%3D%7By%7D%26z%3D%7Bz%7D&zmax=19&zmin=0'

    @staticmethod
    def uriWFS() -> str:
        return r'restrictToRequestBBOX=''1'' srsname=''EPSG:25833'' typename=''fis:re_postleit'' url=''http://fbinter.stadt-berlin.de/fb/wfs/geometry/senstadt/re_postleit'' version=''auto'''

    @staticmethod
    def enmapboxApplication():
        from enmapbox.gui.applications import EnMAPBoxApplication
        from enmapbox import EnMAPBox
        assert isinstance(EnMAPBox.instance(), EnMAPBox), 'Please initialize an EnMAP-Box instance first'

        def testAlgorithm(self, *args):
            v = 'Hello World'
            print(v)
            return v

        class ExampleProcessingAlgorithm(QgsProcessingAlgorithm):
            """
            Exemplary implementation of a QgsProcessingAlgorithm.
            See https://qgis.org/api/classQgsProcessingAlgorithm.html for API documentation
            """

            def __init__(self):
                super(ExampleProcessingAlgorithm, self).__init__()

            def createInstance(self) -> QgsProcessingAlgorithm:
                """
                Creates a new instance of the algorithm class.
                :return: QgsProcessingAlgorithm
                """
                return ExampleProcessingAlgorithm()

            def name(self) -> str:
                return 'examplealgorithm'

            def displayName(self):
                return 'Minimal Example Algorithm'

            def groupId(self) -> str:
                """
                Returns the unique ID of the group this algorithm belongs to.
                :return: str
                """
                return 'testgroup'

            def group(self) -> str:
                """
                Returns the name of the group this algorithm belongs to.
                :return: str
                """
                return 'testgroup'

            def initAlgorithm(self, configuration: dict = None):
                """
                Initializes the algorithm using the specified configuration.
                :param configuration: dict
                """
                self.addParameter(QgsProcessingParameterRasterLayer('pathInput', 'The Input Dataset'))
                self.addParameter(
                    QgsProcessingParameterNumber('value', 'The value', QgsProcessingParameterNumber.Double, 1, False,
                                                 0.00, 999999.99))
                self.addParameter(QgsProcessingParameterRasterDestination('pathOutput', 'The Output Dataset'))

            def processAlgorithm(self, parameters: dict, context: QgsProcessingContext,
                                 feedback: QgsProcessingFeedback):
                """
                Runs the algorithm using the specified parameters.
                :param parameters: dict
                :param context: QgsProcessingContext
                :param feedback: QgsProcessingFeedback
                :return: dict
                """
                assert isinstance(parameters, dict)
                assert isinstance(context, QgsProcessingContext)
                assert isinstance(feedback, QgsProcessingFeedback)

                results = testAlgorithm(parameters)
                outputs = {'results': results}
                return outputs

        class ExampleApp(EnMAPBoxApplication):

            def __init__(self, enmapbox: EnMAPBox, parent):
                super(ExampleApp, self).__init__(enmapbox, parent)

                self.name = 'TestApp'
                self.licence = 'GPL-3'
                self.version = '0.8.15'
                self.description = 'test app'

            def icon(self) -> QIcon:
                return EnMAPBox.icon()

            def menu(self, parentMenu) -> QMenu:
                assert isinstance(parentMenu, QMenu)
                action = parentMenu.addAction('Hello')
                action.triggered.connect(testAlgorithm)
                return parentMenu

            def processingAlgorithms(self) -> list:
                return [ExampleProcessingAlgorithm()]

        emb = EnMAPBox.instance()
        return ExampleApp(emb, emb.ui)

    @staticmethod
    def processingAlgorithm():
        class TestProcessingAlgorithm(QgsProcessingAlgorithm):

            def __init__(self):
                super(TestProcessingAlgorithm, self).__init__()
                s = ""

            def createInstance(self):
                return TestProcessingAlgorithm()

            def name(self):
                return 'exmaplealg'

            def displayName(self):
                return 'Example Algorithm'

            def groupId(self):
                return 'exampleapp'

            def group(self):
                return 'TEST APPS'

            def initAlgorithm(self, configuration=None):
                self.addParameter(QgsProcessingParameterRasterLayer('pathInput', 'The Input Dataset'))
                self.addParameter(
                    QgsProcessingParameterNumber('value', 'The value', QgsProcessingParameterNumber.Double, 1, False,
                                                 0.00, 999999.99))
                self.addParameter(QgsProcessingParameterRasterDestination('pathOutput', 'The Output Dataset'))

            def processAlgorithm(self, parameters, context, feedback):
                assert isinstance(parameters, dict)
                assert isinstance(context, QgsProcessingContext)
                assert isinstance(feedback, QgsProcessingFeedback)

                outputs = {}
                return outputs

        return TestProcessingAlgorithm()


class QgsPluginManagerMockup(QgsPluginManagerInterface):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

    def addPluginMetadata(self, *args, **kwargs):
        super().addPluginMetadata(*args, **kwargs)

    def addToRepositoryList(self, *args, **kwargs):
        super().addToRepositoryList(*args, **kwargs)

    def childEvent(self, *args, **kwargs):
        super().childEvent(*args, **kwargs)

    def clearPythonPluginMetadata(self, *args, **kwargs):
        # super().clearPythonPluginMetadata(*args, **kwargs)
        pass

    def clearRepositoryList(self, *args, **kwargs):
        super().clearRepositoryList(*args, **kwargs)

    def connectNotify(self, *args, **kwargs):
        super().connectNotify(*args, **kwargs)

    def customEvent(self, *args, **kwargs):
        super().customEvent(*args, **kwargs)

    def disconnectNotify(self, *args, **kwargs):
        super().disconnectNotify(*args, **kwargs)

    def isSignalConnected(self, *args, **kwargs):
        return super().isSignalConnected(*args, **kwargs)

    def pluginMetadata(self, *args, **kwargs):
        super().pluginMetadata(*args, **kwargs)

    def pushMessage(self, *args, **kwargs):
        super().pushMessage(*args, **kwargs)

    def receivers(self, *args, **kwargs):
        return super().receivers(*args, **kwargs)

    def reloadModel(self, *args, **kwargs):
        super().reloadModel(*args, **kwargs)

    def sender(self, *args, **kwargs):
        return super().sender(*args, **kwargs)

    def senderSignalIndex(self, *args, **kwargs):
        return super().senderSignalIndex(*args, **kwargs)

    def showPluginManager(self, *args, **kwargs):
        super().showPluginManager(*args, **kwargs)

    def timerEvent(self, *args, **kwargs):
        super().timerEvent(*args, **kwargs)


class PythonRunnerImpl(QgsPythonRunner):
    """
    A Qgs PythonRunner implementation
    """

    def __init__(self):
        super(PythonRunnerImpl, self).__init__()

    def evalCommand(self, cmd: str, result: str):
        try:
            o = compile(cmd)
        except Exception as ex:
            result = str(ex)
            return False
        return True

    def runCommand(self, command, messageOnError=''):
        try:
            o = compile(command, 'fakemodule', 'exec')
            exec(o)
        except Exception as ex:
            messageOnError = str(ex)
            command = ['{}:{}'.format(i + 1, l) for i, l in enumerate(command.splitlines())]
            print('\n'.join(command), file=sys.stderr)
            raise ex
            return False
        return True
