#!/usr/bin/env pytest
###############################################################################
#
# Project:  GDAL/OGR Test Suite
# Purpose:  Test read/write functionality for MrSID driver.
# Author:   Frank Warmerdam <warmerdam@pobox.com>
#
###############################################################################
# Copyright (c) 2005, Frank Warmerdam <warmerdam@pobox.com>
# Copyright (c) 2009-2012, Even Rouault <even dot rouault at spatialys.com>
#
# SPDX-License-Identifier: MIT
###############################################################################

import os
import shutil

import gdaltest
import pytest

from osgeo import gdal, osr

pytestmark = pytest.mark.require_driver("MrSID")

###############################################################################
@pytest.fixture(autouse=True, scope="module")
def startup_and_cleanup():

    gdaltest.mrsid_drv = gdal.GetDriverByName("MrSID")
    gdaltest.jp2mrsid_drv = gdal.GetDriverByName("JP2MrSID")
    if gdaltest.jp2mrsid_drv:
        gdaltest.deregister_all_jpeg2000_drivers_but("JP2MrSID")

    yield

    gdaltest.reregister_all_jpeg2000_drivers()

    try:
        os.remove("data/sid/mercator.sid.aux.xml")
        os.remove("data/sid/mercator_new.sid.aux.xml")
    except OSError:
        pass


###############################################################################
# Read a simple byte file, checking projections and geotransform.


def test_mrsid_1():

    tst = gdaltest.GDALTest("MrSID", "sid/mercator.sid", 1, None)

    gt = (-15436.385771224039, 60.0, 0.0, 3321987.8617962394, 0.0, -60.0)
    #
    # Old, internally generated.
    #
    prj = """PROJCS["MER         E000|",
    GEOGCS["NAD27",
        DATUM["North_American_Datum_1927",
            SPHEROID["Clarke 1866",6378206.4,294.9786982138982,
                AUTHORITY["EPSG","7008"]],
            AUTHORITY["EPSG","6267"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4267"]],
    PROJECTION["Mercator_1SP"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",0],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]]]"""
    #
    # MrSID SDK getWKT() method.
    #
    prj = """PROJCS["MER         E000|",
    GEOGCS["NAD27",
        DATUM["North_American_Datum_1927",
            SPHEROID["Clarke 1866",6378206.4,294.9786982139006,
                AUTHORITY["EPSG","7008"]],
            AUTHORITY["EPSG","6267"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4267"]],
    PROJECTION["Mercator_1SP"],
    PARAMETER["latitude_of_origin",1],
    PARAMETER["central_meridian",1],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",1],
    PARAMETER["false_northing",1],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]]]"""

    #
    # MrSID SDK getWKT() method - DSDK 8 and newer?
    #
    prj = """PROJCS["MER         E000|",
    GEOGCS["NAD27",
        DATUM["North_American_Datum_1927",
            SPHEROID["Clarke 1866",6378206.4,294.9786982139006,
                AUTHORITY["EPSG","7008"]],
            AUTHORITY["EPSG","6267"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4267"]],
    PROJECTION["Mercator_1SP"],
    PARAMETER["central_meridian",0],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]]]"""

    tst.testOpen(
        check_gt=gt,
        check_stat=(0.0, 255.0, 103.319, 55.153),
        check_approx_stat=(2.0, 243.0, 103.131, 43.978),
    )

    ds = gdal.Open("data/sid/mercator.sid")
    got_prj = ds.GetProjectionRef()
    ds = None

    if prj.find("North_American_Datum_1927") == -1 or prj.find("Mercator_1SP") == -1:
        print(got_prj)
        pytest.fail("did not get expected projection")

    if got_prj != prj:
        print("Warning: did not get exactly expected projection. Got %s" % got_prj)


###############################################################################
# Do a direct IO to read the image at a resolution for which there is no
# builtin overview.  Checks for the bug Steve L found in the optimized
# RasterIO implementation.


def test_mrsid_2():

    ds = gdal.Open("data/sid/mercator.sid")

    try:
        data = ds.ReadRaster(0, 0, 515, 515, buf_xsize=10, buf_ysize=10)
    except Exception:
        pytest.fail("Small overview read failed: " + gdal.GetLastErrorMsg())

    ds = None

    total = sum(data)
    mean = float(total) / len(data)

    assert mean >= 95 and mean <= 105, "image mean out of range."


###############################################################################
# Test overview reading.


def test_mrsid_3():

    ds = gdal.Open("data/sid/mercator.sid")

    band = ds.GetRasterBand(1)
    assert band.GetOverviewCount() == 4, "did not get expected overview count"

    new_stat = band.GetOverview(3).GetStatistics(0, 1)

    check_stat = (11.0, 230.0, 103.42607897153351, 39.952592422557757)

    stat_epsilon = 0.0001
    for i in range(4):
        if new_stat[i] != pytest.approx(check_stat[i], abs=stat_epsilon):
            print("")
            print("old = ", check_stat)
            print("new = ", new_stat)
            pytest.fail("Statistics differ.")


###############################################################################
# Check a new (V3) file which uses a different form for coordinate sys.


def test_mrsid_4():

    try:
        os.remove("data/sid/mercator_new.sid.aux.xml")
    except OSError:
        pass

    tst = gdaltest.GDALTest("MrSID", "sid/mercator_new.sid", 1, None)

    gt = (-15436.385771224039, 60.0, 0.0, 3321987.8617962394, 0.0, -60.0)
    prj = """PROJCS["MER         E000",
    GEOGCS["NAD27",
        DATUM["North_American_Datum_1927",
            SPHEROID["Clarke 1866",6378206.4,294.9786982138982,
                AUTHORITY["EPSG","7008"]],
            AUTHORITY["EPSG","6267"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4267"]],
    PROJECTION["Mercator_1SP"],
    PARAMETER["latitude_of_origin",33.76446202777777],
    PARAMETER["central_meridian",-117.4745428888889],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]]]"""

    tst.testOpen(
        check_gt=gt,
        check_prj=prj,
        check_stat=(0.0, 255.0, 103.112, 52.477),
        check_approx_stat=(0.0, 255.0, 102.684, 51.614),
    )

    try:
        os.remove("data/sid/mercator_new.sid.aux.xml")
    except OSError:
        pass


###############################################################################
# Open byte.jp2


def test_mrsid_6():

    if gdaltest.jp2mrsid_drv is None:
        pytest.skip()

    srs = """PROJCS["NAD27 / UTM zone 11N",
    GEOGCS["NAD27",
        DATUM["North_American_Datum_1927",
            SPHEROID["Clarke 1866",6378206.4,294.9786982138982,
                AUTHORITY["EPSG","7008"]],
            AUTHORITY["EPSG","6267"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4267"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-117],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","26711"]]
"""
    gt = (440720.0, 60.0, 0.0, 3751320.0, 0.0, -60.0)

    tst = gdaltest.GDALTest("JP2MrSID", "jpeg2000/byte.jp2", 1, 50054)
    tst.testOpen(check_prj=srs, check_gt=gt)


###############################################################################
# Open int16.jp2


def test_mrsid_7():

    if gdaltest.jp2mrsid_drv is None:
        pytest.skip()

    ds = gdal.Open("data/jpeg2000/int16.jp2")
    ds_ref = gdal.Open("data/int16.tif")

    maxdiff = gdaltest.compare_ds(ds, ds_ref)

    if maxdiff > 5:
        print(ds.GetRasterBand(1).Checksum())
        print(ds_ref.GetRasterBand(1).Checksum())

        ds = None
        ds_ref = None
        pytest.fail("Image too different from reference")

    ds = None
    ds_ref = None


###############################################################################
# Test PAM override for nodata, coordsys, and geotransform.


def test_mrsid_8():

    new_gt = (10000, 50, 0, 20000, 0, -50)
    srs = osr.SpatialReference()
    srs.ImportFromEPSG(27700)

    if os.path.exists("tmp/mercator.sid"):
        gdal.Unlink("tmp/mercator.sid")

    shutil.copyfile("data/sid/mercator.sid", "tmp/mercator.sid")

    ds = gdal.Open("tmp/mercator.sid")

    ds.SetGeoTransform(new_gt)
    ds.SetSpatialRef(srs)
    ds.GetRasterBand(1).SetNoDataValue(255)
    ds = None

    ds = gdal.Open("tmp/mercator.sid")

    assert ds.GetSpatialRef().IsSame(srs), "SRS Override failed."

    assert new_gt == ds.GetGeoTransform(), "Geotransform Override failed."

    assert ds.GetRasterBand(1).GetNoDataValue() == 255, "Nodata override failed."

    ds = None

    gdal.GetDriverByName("MrSID").Delete("tmp/mercator.sid")


###############################################################################
# Test VSI*L IO with .sid


def test_mrsid_9():

    f = open("data/sid/mercator.sid", "rb")
    data = f.read()
    f.close()

    f = gdal.VSIFOpenL("/vsimem/mrsid_9.sid", "wb")
    gdal.VSIFWriteL(data, 1, len(data), f)
    gdal.VSIFCloseL(f)

    ds = gdal.Open("/vsimem/mrsid_9.sid")
    assert ds is not None
    ds = None

    gdal.Unlink("/vsimem/mrsid_9.sid")


###############################################################################
# Test VSI*L IO with .jp2


def test_mrsid_10():

    if gdaltest.jp2mrsid_drv is None:
        pytest.skip()

    f = open("data/jpeg2000/int16.jp2", "rb")
    data = f.read()
    f.close()

    f = gdal.VSIFOpenL("/vsimem/mrsid_10.jp2", "wb")
    gdal.VSIFWriteL(data, 1, len(data), f)
    gdal.VSIFCloseL(f)

    ds = gdal.Open("/vsimem/mrsid_10.jp2")
    assert ds is not None
    ds = None

    gdal.Unlink("/vsimem/mrsid_10.jp2")


###############################################################################
# Check that we can use .j2w world files (#4651)


def test_mrsid_11():

    if gdaltest.jp2mrsid_drv is None:
        pytest.skip()

    ds = gdal.Open("data/jpeg2000/byte_without_geotransform.jp2")

    geotransform = ds.GetGeoTransform()
    assert (
        geotransform[0] == pytest.approx(440720, abs=0.1)
        and geotransform[1] == pytest.approx(60, abs=0.001)
        and geotransform[2] == pytest.approx(0, abs=0.001)
        and geotransform[3] == pytest.approx(3751320, abs=0.1)
        and geotransform[4] == pytest.approx(0, abs=0.001)
        and geotransform[5] == pytest.approx(-60, abs=0.001)
    ), "geotransform differs from expected"

    ds = None


###############################################################################


def test_mrsid_online_1():

    if gdaltest.jp2mrsid_drv is None:
        pytest.skip()

    gdaltest.download_or_skip(
        "http://download.osgeo.org/gdal/data/jpeg2000/7sisters200.j2k",
        "7sisters200.j2k",
    )

    # Checksum = 29473 on my PC
    tst = gdaltest.GDALTest(
        "JP2MrSID", "tmp/cache/7sisters200.j2k", 1, None, filename_absolute=1
    )

    tst.testOpen()

    ds = gdal.Open("tmp/cache/7sisters200.j2k")
    ds.GetRasterBand(1).Checksum()
    ds = None


###############################################################################


def test_mrsid_online_2():

    if gdaltest.jp2mrsid_drv is None:
        pytest.skip()

    gdaltest.download_or_skip(
        "http://download.osgeo.org/gdal/data/jpeg2000/gcp.jp2", "gcp.jp2"
    )

    # Checksum = 209 on my PC
    tst = gdaltest.GDALTest(
        "JP2MrSID", "tmp/cache/gcp.jp2", 1, None, filename_absolute=1
    )

    tst.testOpen()

    # The JP2MrSID driver doesn't handle GCPs
    ds = gdal.Open("tmp/cache/gcp.jp2")
    ds.GetRasterBand(1).Checksum()
    # if len(ds.GetGCPs()) != 15:
    #    gdaltest.post_reason('bad number of GCP')
    #    return 'fail'
    #
    # expected_wkt = """GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433],AUTHORITY["EPSG","4326"]]"""
    # if ds.GetGCPProjection() != expected_wkt:
    #    gdaltest.post_reason('bad GCP projection')
    #    return 'fail'

    ds = None


###############################################################################


def test_mrsid_online_3():

    if gdaltest.jp2mrsid_drv is None:
        pytest.skip()

    gdaltest.download_or_skip(
        "http://www.openjpeg.org/samples/Bretagne1.j2k", "Bretagne1.j2k"
    )

    gdaltest.download_or_skip(
        "http://www.openjpeg.org/samples/Bretagne1.bmp", "Bretagne1.bmp"
    )

    # checksum = 14443 on my PC
    tst = gdaltest.GDALTest(
        "JP2MrSID", "tmp/cache/Bretagne1.j2k", 1, None, filename_absolute=1
    )

    tst.testOpen()

    ds = gdal.Open("tmp/cache/Bretagne1.j2k")
    ds_ref = gdal.Open("tmp/cache/Bretagne1.bmp")
    maxdiff = gdaltest.compare_ds(ds, ds_ref, verbose=0)

    ds = None
    ds_ref = None

    # Difference between the image before and after compression
    if maxdiff > 17:
        print(ds.GetRasterBand(1).Checksum())
        print(ds_ref.GetRasterBand(1).Checksum())

        gdaltest.compare_ds(ds, ds_ref, verbose=1)
        pytest.fail("Image too different from reference")


###############################################################################


def test_mrsid_online_4():

    if gdaltest.jp2mrsid_drv is None:
        pytest.skip()

    gdaltest.download_or_skip(
        "http://www.openjpeg.org/samples/Bretagne2.j2k", "Bretagne2.j2k"
    )

    gdaltest.download_or_skip(
        "http://www.openjpeg.org/samples/Bretagne2.bmp", "Bretagne2.bmp"
    )

    # Checksum = 53186 on my PC
    tst = gdaltest.GDALTest(
        "JP2MrSID", "tmp/cache/Bretagne2.j2k", 1, None, filename_absolute=1
    )

    tst.testOpen()

    ds = gdal.Open("tmp/cache/Bretagne2.j2k")
    ds_ref = gdal.Open("tmp/cache/Bretagne2.bmp")
    maxdiff = gdaltest.compare_ds(ds, ds_ref, width=256, height=256)

    ds = None
    ds_ref = None

    # Difference between the image before and after compression
    if maxdiff > 1:
        print(ds.GetRasterBand(1).Checksum())
        print(ds_ref.GetRasterBand(1).Checksum())
        pytest.fail("Image too different from reference")
