#!/usr/bin/env pytest
# -*- coding: utf-8 -*-
###############################################################################
# $Id$
#
# Project:  GDAL/OGR Test Suite
# Purpose:  Test GDALNoDataMaskBand
# Author:   Even Rouault <even.rouault at spatialys.com>
#
###############################################################################
# Copyright (c) 2018, 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 struct

from osgeo import gdal


def test_nodatamaskband_1():

    for (dt, struct_type, v) in [(gdal.GDT_Byte, 'B', 255),
                                 (gdal.GDT_Int16, 'h', 32767),
                                 (gdal.GDT_UInt16, 'H', 65535),
                                 (gdal.GDT_Int32, 'i', 0x7FFFFFFF),
                                 (gdal.GDT_UInt32, 'I', 0xFFFFFFFF),
                                 (gdal.GDT_Float32, 'f', 1.25),
                                 (gdal.GDT_Float32, 'f', float('nan')),
                                 (gdal.GDT_Float64, 'd', 1.2345678),
                                 (gdal.GDT_Float64, 'd', float('nan'))]:

        ds = gdal.GetDriverByName('MEM').Create('', 6, 4, 1, dt)
        ds.GetRasterBand(1).SetNoDataValue(v)
        ds.GetRasterBand(1).WriteRaster(0, 0, 6, 4,
                                        struct.pack(struct_type * 6 * 4,
                                                    v, 1, 1, v, v, 0,
                                                    v, 1, 1, v, v, 0,
                                                    v, 1, 1, v, v, 0,
                                                    0, v, v, 0, 0, 0))

        data = ds.GetRasterBand(1).GetMaskBand().ReadRaster()
        data_ar = struct.unpack('B' * 6 * 4, data)
        expected_ar = (0, 255, 255, 0, 0, 255,
                       0, 255, 255, 0, 0, 255,
                       0, 255, 255, 0, 0, 255,
                       255, 0, 0, 255, 255, 255)
        assert data_ar == expected_ar, dt

        data = ds.GetRasterBand(1).GetMaskBand().ReadBlock(0, 0)
        data_ar = struct.unpack('B' * 6 * 1, data)
        expected_ar = (0, 255, 255, 0, 0, 255)
        assert data_ar == expected_ar, dt

        data = ds.GetRasterBand(1).GetMaskBand().ReadBlock(0, 3)
        data_ar = struct.unpack('B' * 6 * 1, data)
        expected_ar = (255, 0, 0, 255, 255, 255)
        assert data_ar == expected_ar, dt

        data = ds.GetRasterBand(1).GetMaskBand().ReadRaster(
            buf_xsize=3, buf_ysize=2)
        data_ar = struct.unpack('B' * 3 * 2, data)
        expected_ar = (255, 0, 255,
                       0, 255, 255)
        assert data_ar == expected_ar, dt

        data = ds.GetRasterBand(1).GetMaskBand().ReadRaster(
            buf_type=gdal.GDT_UInt16, buf_xsize=3, buf_ysize=2)
        data_ar = struct.unpack('H' * 3 * 2, data)
        expected_ar = (255, 0, 255,
                       0, 255, 255)
        assert data_ar == expected_ar, dt
