#!/usr/bin/env pytest
###############################################################################
# $Id$
#
# Project:  GDAL/OGR Test Suite
# Purpose:  gdal_fillnodata.py testing
# Author:   Even Rouault <even dot rouault @ spatialys.com>
#
###############################################################################
# Copyright (c) 2010, Even Rouault <even dot 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, fillnodata, 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 struct

import pytest
import test_py_scripts

from osgeo import gdal

pytestmark = pytest.mark.skipif(
    test_py_scripts.get_py_script("gdal_fillnodata") is None,
    reason="gdal_fillnodata not available",
)


@pytest.fixture()
def script_path():
    return test_py_scripts.get_py_script("gdal_fillnodata")


###############################################################################
# Dummy test : there is no nodata value in the source dataset !


def test_gdal_fillnodata_1(script_path):

    test_py_scripts.run_py_script(
        script_path,
        "gdal_fillnodata",
        test_py_scripts.get_data_path("gcore")
        + "byte.tif tmp/test_gdal_fillnodata_1.tif",
    )

    try:
        ds = gdal.Open("tmp/test_gdal_fillnodata_1.tif")
        assert ds.GetRasterBand(1).Checksum() == 4672
        ds = None
    finally:
        gdal.GetDriverByName("GTiff").Delete("tmp/test_gdal_fillnodata_1.tif")


###############################################################################
# Make sure we copy the no data value to the dst when created
# No data value for nodata_byte.tif is 0.


def test_gdal_fillnodata_2(script_path):

    test_py_scripts.run_py_script(
        script_path,
        "gdal_fillnodata",
        "-si 0 "
        + test_py_scripts.get_data_path("gcore")
        + "nodata_byte.tif tmp/test_gdal_fillnodata_2.tif",
    )

    try:
        ds = gdal.Open("tmp/test_gdal_fillnodata_2.tif")
        assert (
            ds.GetRasterBand(1).GetNoDataValue() == 0
        ), "Failed to copy No Data Value to dst dataset."
        ds = None
    finally:
        gdal.GetDriverByName("GTiff").Delete("tmp/test_gdal_fillnodata_2.tif")


###############################################################################
# Test -si 1 and -md


def test_gdal_fillnodata_smoothing(script_path):

    ds = gdal.GetDriverByName("GTiff").Create(
        "tmp/test_gdal_fillnodata_smoothing_in.tif", 4, 4
    )
    ds.GetRasterBand(1).SetNoDataValue(0)
    input_data = (20, 30, 40, 50, 30, 0, 0, 60, 40, 0, 0, 70, 50, 60, 70, 80)
    ds.GetRasterBand(1).WriteRaster(
        0, 0, 4, 4, b"".join([struct.pack("B", x) for x in input_data])
    )
    ds = None

    test_py_scripts.run_py_script(
        script_path,
        "gdal_fillnodata",
        "-md 1 -si 1 tmp/test_gdal_fillnodata_smoothing_in.tif tmp/test_gdal_fillnodata_smoothing.tif",
    )

    expected_data = (20, 30, 40, 50, 30, 40, 50, 60, 40, 50, 60, 70, 50, 60, 70, 80)
    try:
        ds = gdal.Open("tmp/test_gdal_fillnodata_smoothing.tif")
        assert (
            struct.unpack("B" * 16, ds.GetRasterBand(1).ReadRaster()) == expected_data
        )
        ds = None
    finally:
        gdal.GetDriverByName("GTiff").Delete(
            "tmp/test_gdal_fillnodata_smoothing_in.tif"
        )
        gdal.GetDriverByName("GTiff").Delete("tmp/test_gdal_fillnodata_smoothing.tif")