"""
***************************************************************************
    r_blend_rgb.py
    --------------
    Date                 : February 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__ = "February 2016"
__copyright__ = "(C) 2016, Médéric Ribreux"

import os

from grassprovider.grass_utils import GrassUtils


def processInputs(alg, parameters, context, feedback):
    if "first" and "second" in alg.exportedLayers:
        return

    # Use v.in.ogr
    for name in ["first", "second"]:
        alg.loadRasterLayerFromParameter(name, parameters, context, False, None)
    alg.postInputs(context)


def processCommand(alg, parameters, context, feedback):
    # We need to remove all outputs
    alg.processCommand(parameters, context, feedback, True)


def processOutputs(alg, parameters, context, feedback):
    createOpt = alg.parameterAsString(parameters, alg.GRASS_RASTER_FORMAT_OPT, context)
    metaOpt = alg.parameterAsString(parameters, alg.GRASS_RASTER_FORMAT_META, context)

    # Export each color raster
    colors = ["red", "green", "blue"]
    for color in colors:
        fileName = os.path.normpath(
            alg.parameterAsOutputLayer(parameters, f"output_{color}", context)
        )
        outFormat = GrassUtils.getRasterFormatFromFilename(fileName)
        alg.exportRasterLayer(
            f"blended.{color[0]}", fileName, True, outFormat, createOpt, metaOpt
        )
