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

"""
***************************************************************************
    i_pansharpen.py
    ---------------
    Date                 : March 2016
    Copyright            : (C) 2016 by Médéric Ribreux
    Email                : medspx at medspx dot fr
***************************************************************************
*                                                                         *
*   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__ = 'Médéric Ribreux'
__date__ = 'March 2016'
__copyright__ = '(C) 2016, Médéric Ribreux'

import os
from qgis.core import QgsProcessingParameterString
from processing.tools.system import getTempFilename
from grassprovider.Grass7Utils import Grass7Utils


def processCommand(alg, parameters, context, feedback):
    # Temporary remove outputs and add a virtual output parameter
    outputName = 'output_{}'.format(os.path.basename(getTempFilename()))
    param = QgsProcessingParameterString('output', 'virtual output',
                                         outputName, False, False)
    alg.addParameter(param)
    alg.processCommand(parameters, context, feedback, True)


def processOutputs(alg, parameters, context, feedback):
    outputName = alg.parameterAsString(parameters, 'output', context)
    createOpt = alg.parameterAsString(parameters, alg.GRASS_RASTER_FORMAT_OPT, context)
    metaOpt = alg.parameterAsString(parameters, alg.GRASS_RASTER_FORMAT_META, context)
    for channel in ['red', 'green', 'blue']:
        fileName = alg.parameterAsOutputLayer(parameters, '{}output'.format(channel), context)
        grassName = '{}_{}'.format(outputName, channel)
        outFormat = Grass7Utils.getRasterFormatFromFilename(fileName)
        alg.exportRasterLayer(grassName, fileName, True, outFormat, createOpt, metaOpt)