# -*- coding: utf-8 -*-

"""
***************************************************************************
    self.py
    ---------------------
    Date                 : August 2012
    Copyright            : (C) 2012 by Victor Olaya
    Email                : volayaf at gmail dot 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 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
***************************************************************************
"""

__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'

import os

from qgis.PyQt.QtGui import QIcon
from qgis.core import (QgsRasterFileWriter,
                       QgsProcessingException,
                       QgsProcessingParameterDefinition,
                       QgsProcessingParameterRasterLayer,
                       QgsProcessingParameterCrs,
                       QgsProcessingParameterString,
                       QgsProcessingParameterNumber,
                       QgsProcessingParameterEnum,
                       QgsProcessingParameterBoolean,
                       QgsProcessingParameterExtent,
                       QgsProcessingParameterString,
                       QgsProcessingParameterRasterDestination,
                       QgsProcessingUtils)
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.algs.gdal.GdalUtils import GdalUtils

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


class warp(GdalAlgorithm):

    INPUT = 'INPUT'
    SOURCE_CRS = 'SOURCE_CRS'
    TARGET_CRS = 'TARGET_CRS'
    NODATA = 'NODATA'
    TARGET_RESOLUTION = 'TARGET_RESOLUTION'
    OPTIONS = 'OPTIONS'
    RESAMPLING = 'RESAMPLING'
    DATA_TYPE = 'DATA_TYPE'
    TARGET_EXTENT = 'TARGET_EXTENT'
    TARGET_EXTENT_CRS = 'TARGET_EXTENT_CRS'
    MULTITHREADING = 'MULTITHREADING'
    EXTRA = 'EXTRA'
    OUTPUT = 'OUTPUT'

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

    def initAlgorithm(self, config=None):
        self.methods = ((self.tr('Nearest Neighbour'), 'near'),
                        (self.tr('Bilinear'), 'bilinear'),
                        (self.tr('Cubic'), 'cubic'),
                        (self.tr('Cubic Spline'), 'cubicspline'),
                        (self.tr('Lanczos Windowed Sinc'), 'lanczos'),
                        (self.tr('Average'), 'average'),
                        (self.tr('Mode'), 'mode'),
                        (self.tr('Maximum'), 'max'),
                        (self.tr('Minimum'), 'min'),
                        (self.tr('Median'), 'med'),
                        (self.tr('First Quartile'), 'q1'),
                        (self.tr('Third Quartile'), 'q3'))

        self.TYPES = [self.tr('Use Input Layer Data Type'), 'Byte', 'Int16', 'UInt16', 'UInt32', 'Int32', 'Float32', 'Float64', 'CInt16', 'CInt32', 'CFloat32', 'CFloat64']

        self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT, self.tr('Input layer')))
        self.addParameter(QgsProcessingParameterCrs(self.SOURCE_CRS,
                                                    self.tr('Source CRS'),
                                                    optional=True))
        self.addParameter(QgsProcessingParameterCrs(self.TARGET_CRS,
                                                    self.tr('Target CRS'),
                                                    optional=True))
        self.addParameter(QgsProcessingParameterEnum(self.RESAMPLING,
                                                     self.tr('Resampling method to use'),
                                                     options=[i[0] for i in self.methods],
                                                     defaultValue=0))
        self.addParameter(QgsProcessingParameterNumber(self.NODATA,
                                                       self.tr('Nodata value for output bands'),
                                                       type=QgsProcessingParameterNumber.Double,
                                                       defaultValue=None,
                                                       optional=True))
        self.addParameter(QgsProcessingParameterNumber(self.TARGET_RESOLUTION,
                                                       self.tr('Output file resolution in target georeferenced units'),
                                                       type=QgsProcessingParameterNumber.Double,
                                                       minValue=0.0,
                                                       defaultValue=None,
                                                       optional=True))

        options_param = QgsProcessingParameterString(self.OPTIONS,
                                                     self.tr('Additional creation options'),
                                                     defaultValue='',
                                                     optional=True)
        options_param.setFlags(options_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
        options_param.setMetadata({
            'widget_wrapper': {
                'class': 'processing.algs.gdal.ui.RasterOptionsWidget.RasterOptionsWidgetWrapper'}})
        self.addParameter(options_param)

        dataType_param = QgsProcessingParameterEnum(self.DATA_TYPE,
                                                    self.tr('Output data type'),
                                                    self.TYPES,
                                                    allowMultiple=False,
                                                    defaultValue=0)
        dataType_param.setFlags(dataType_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
        self.addParameter(dataType_param)

        target_extent_param = QgsProcessingParameterExtent(self.TARGET_EXTENT,
                                                           self.tr('Georeferenced extents of output file to be created'),
                                                           optional=True)
        target_extent_param.setFlags(target_extent_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
        self.addParameter(target_extent_param)

        target_extent_crs_param = QgsProcessingParameterCrs(self.TARGET_EXTENT_CRS,
                                                            self.tr('CRS of the target raster extent'),
                                                            optional=True)
        target_extent_crs_param.setFlags(target_extent_crs_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
        self.addParameter(target_extent_crs_param)

        multithreading_param = QgsProcessingParameterBoolean(self.MULTITHREADING,
                                                             self.tr('Use multithreaded warping implementation'),
                                                             defaultValue=False)
        multithreading_param.setFlags(multithreading_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
        self.addParameter(multithreading_param)

        extra_param = QgsProcessingParameterString(self.EXTRA,
                                                   self.tr('Additional command-line parameters'),
                                                   defaultValue=None,
                                                   optional=True)
        extra_param.setFlags(extra_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
        self.addParameter(extra_param)

        self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT,
                                                                  self.tr('Reprojected')))

    def name(self):
        return 'warpreproject'

    def displayName(self):
        return self.tr('Warp (reproject)')

    def group(self):
        return self.tr('Raster projections')

    def groupId(self):
        return 'rasterprojections'

    def icon(self):
        return QIcon(os.path.join(pluginPath, 'images', 'gdaltools', 'warp.png'))

    def commandName(self):
        return 'gdalwarp'

    def tags(self):
        tags = self.tr('transform,reproject,crs,srs').split(',')
        tags.extend(super().tags())
        return tags

    def getConsoleCommands(self, parameters, context, feedback, executing=True):
        inLayer = self.parameterAsRasterLayer(parameters, self.INPUT, context)
        if inLayer is None:
            raise QgsProcessingException(self.invalidRasterError(parameters, self.INPUT))

        out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
        self.setOutputValue(self.OUTPUT, out)
        sourceCrs = self.parameterAsCrs(parameters, self.SOURCE_CRS, context)
        targetCrs = self.parameterAsCrs(parameters, self.TARGET_CRS, context)
        if self.NODATA in parameters and parameters[self.NODATA] is not None:
            nodata = self.parameterAsDouble(parameters, self.NODATA, context)
        else:
            nodata = None
        resolution = self.parameterAsDouble(parameters, self.TARGET_RESOLUTION, context)

        arguments = []
        if sourceCrs.isValid():
            arguments.append('-s_srs')
            arguments.append(GdalUtils.gdal_crs_string(sourceCrs))

        if targetCrs.isValid():
            arguments.append('-t_srs')
            arguments.append(GdalUtils.gdal_crs_string(targetCrs))

        if nodata is not None:
            arguments.append('-dstnodata')
            arguments.append(str(nodata))

        if resolution:
            arguments.append('-tr')
            arguments.append(str(resolution))
            arguments.append(str(resolution))

        arguments.append('-r')
        arguments.append(self.methods[self.parameterAsEnum(parameters, self.RESAMPLING, context)][1])

        extent = self.parameterAsExtent(parameters, self.TARGET_EXTENT, context)
        if not extent.isNull():
            arguments.append('-te')
            arguments.append(extent.xMinimum())
            arguments.append(extent.yMinimum())
            arguments.append(extent.xMaximum())
            arguments.append(extent.yMaximum())

            extentCrs = self.parameterAsCrs(parameters, self.TARGET_EXTENT_CRS, context)
            if extentCrs:
                arguments.append('-te_srs')
                arguments.append(extentCrs.authid())

        if self.parameterAsBoolean(parameters, self.MULTITHREADING, context):
            arguments.append('-multi')

        data_type = self.parameterAsEnum(parameters, self.DATA_TYPE, context)
        if data_type:
            arguments.append('-ot ' + self.TYPES[data_type])

        out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
        self.setOutputValue(self.OUTPUT, out)
        arguments.append('-of')
        arguments.append(QgsRasterFileWriter.driverForExtension(os.path.splitext(out)[1]))

        options = self.parameterAsString(parameters, self.OPTIONS, context)
        if options:
            arguments.extend(GdalUtils.parseCreationOptions(options))

        if self.EXTRA in parameters and parameters[self.EXTRA] not in (None, ''):
            extra = self.parameterAsString(parameters, self.EXTRA, context)
            arguments.append(extra)

        arguments.append(inLayer.source())
        arguments.append(out)

        return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]
