#!/usr/bin/env python
# -*- coding: utf-8 -*-
###############################################################################
# $Id$
#
# Project:  GDAL/OGR Test Suite
# Purpose:  gdal_pansharpen testing
# Author:   Even Rouault <even.rouault at spatialys.com>
#
###############################################################################
# Copyright (c) 2015, Even Rouault <even.rouault at spatialys.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
###############################################################################

import sys

sys.path.append( '../pymod' )

from osgeo import gdal
import gdaltest
import test_py_scripts

###############################################################################
# Simple test

def test_gdal_pansharpen_1():

    script_path = test_py_scripts.get_py_script('gdal_pansharpen')
    if script_path is None:
        return 'skip'

    src_ds = gdal.Open('../gdrivers/data/small_world.tif')
    src_data = src_ds.GetRasterBand(1).ReadRaster()
    gt = src_ds.GetGeoTransform()
    wkt = src_ds.GetProjectionRef()
    src_ds = None
    pan_ds = gdal.GetDriverByName('GTiff').Create('tmp/small_world_pan.tif', 800, 400)
    gt = [ gt[i] for i in range(len(gt)) ]
    gt[1] *= 0.5
    gt[5] *= 0.5
    pan_ds.SetGeoTransform(gt)
    pan_ds.SetProjection(wkt)
    pan_ds.GetRasterBand(1).WriteRaster(0,0,800,400,src_data,400,200)
    pan_ds = None

    test_py_scripts.run_py_script(script_path, 'gdal_pansharpen', ' tmp/small_world_pan.tif ../gdrivers/data/small_world.tif tmp/out.tif')

    ds = gdal.Open('tmp/out.tif')
    cs = [ ds.GetRasterBand(i+1).Checksum() for i in range(ds.RasterCount) ]
    ds = None
    gdal.GetDriverByName('GTiff').Delete('tmp/out.tif')

    if cs != [4735, 10000, 9742]:
        gdaltest.post_reason('fail')
        print(cs)
        return 'fail'

    return 'success'

###############################################################################
# Full options

def test_gdal_pansharpen_2():

    script_path = test_py_scripts.get_py_script('gdal_pansharpen')
    if script_path is None:
        return 'skip'

    test_py_scripts.run_py_script(script_path, 'gdal_pansharpen', ' -q -b 3 -b 1 -bitdepth 8 -threads ALL_CPUS -spat_adjust union -w 0.33333333333333333 -w 0.33333333333333333 -w 0.33333333333333333 -of VRT -r cubic tmp/small_world_pan.tif ../gdrivers/data/small_world.tif,band=1 ../gdrivers/data/small_world.tif,band=2 ../gdrivers/data/small_world.tif,band=3 tmp/out.vrt')

    ds = gdal.Open('tmp/out.vrt')
    cs = [ ds.GetRasterBand(i+1).Checksum() for i in range(ds.RasterCount) ]
    ds = None
    gdal.GetDriverByName('VRT').Delete('tmp/out.vrt')

    if cs != [9742, 4735]:
        gdaltest.post_reason('fail')
        print(cs)
        return 'fail'

    return 'success'

###############################################################################
# Cleanup

def test_gdal_pansharpen_cleanup():

    script_path = test_py_scripts.get_py_script('gdal_pansharpen')
    if script_path is None:
        return 'skip'

    gdal.GetDriverByName('GTiff').Delete('tmp/small_world_pan.tif')

    return 'success'

gdaltest_list = [
    test_gdal_pansharpen_1,
    test_gdal_pansharpen_2,
    test_gdal_pansharpen_cleanup
    ]

if __name__ == '__main__':

    gdaltest.setup_run( 'test_gdal_pansharpen' )

    gdaltest.run_tests( gdaltest_list )

    gdaltest.summarize()