from __future__ import annotations

from typing import Union

import pytest

from PIL import Image

from .helper import is_big_endian

X = 255

UnPackParamTypes = list[
    tuple[str, str, Union[bytes, int], list[Union[float, tuple[int, ...]]]]
]


def get_pack_parameters() -> UnPackParamTypes:
    params: UnPackParamTypes = []

    # Mode 1
    params += [
        ("1", "1", b"\x01", [0, 0, 0, 0, 0, 0, 0, X]),
        ("1", "1;I", b"\x01", [X, X, X, X, X, X, X, 0]),
        ("1", "1;R", b"\x01", [X, 0, 0, 0, 0, 0, 0, 0]),
        ("1", "1;IR", b"\x01", [0, X, X, X, X, X, X, X]),
        ("1", "1", b"\xaa", [X, 0, X, 0, X, 0, X, 0]),
        ("1", "1;I", b"\xaa", [0, X, 0, X, 0, X, 0, X]),
        ("1", "1;R", b"\xaa", [0, X, 0, X, 0, X, 0, X]),
        ("1", "1;IR", b"\xaa", [X, 0, X, 0, X, 0, X, 0]),
        ("1", "L", b"\xff\x00\x00\xff\x00\x00", [X, 0, 0, X, 0, 0]),
    ]

    # Mode L
    params += [
        ("L", "L", 1, [1, 2, 3, 4]),
        ("L", "L;16", b"\x00\xc6\x00\xaf", [198, 175]),
        ("L", "L;16B", b"\xc6\x00\xaf\x00", [198, 175]),
    ]

    # Mode LA
    params += [
        ("LA", "LA", 2, [(1, 2), (3, 4), (5, 6)]),
        ("LA", "LA;L", 2, [(1, 4), (2, 5), (3, 6)]),
    ]

    # Mode La
    params += [("La", "La", 2, [(1, 2), (3, 4), (5, 6)])]

    # Mode P
    params += [
        ("P", "P;1", b"\xe4", [1, 1, 1, 0, 0, 255, 0, 0]),
        ("P", "P;2", b"\xe4", [3, 2, 1, 0]),
        ("P", "P;4", b"\x02\xef", [0, 2, 14, 15]),
        ("P", "P", 1, [1, 2, 3, 4]),
    ]

    # Mode PA
    params += [
        ("PA", "PA", 2, [(1, 2), (3, 4), (5, 6)]),
        ("PA", "PA;L", 2, [(1, 4), (2, 5), (3, 6)]),
    ]

    # Mode RGB
    params += [
        ("RGB", "XRGB;1555", b"\x00\x86\x01\x8c", [(8, 131, 0), (24, 0, 8)]),
        ("RGB", "RGB;565", b"\x00\n\x00\x1c", [(8, 64, 0), (24, 129, 0)]),
        ("RGB", "RGB", 3, [(1, 2, 3), (4, 5, 6), (7, 8, 9)]),
        ("RGB", "RGBX", b"\x01\x02\x03\xff\x05\x06\x07\xff", [(1, 2, 3), (5, 6, 7)]),
        ("RGB", "XRGB", b"\x00\x02\x03\x04\x00\x06\x07\x08", [(2, 3, 4), (6, 7, 8)]),
        ("RGB", "XBGR;1555", b"\x00\x86\x01\x8c", [(0, 131, 8), (8, 0, 24)]),
        ("RGB", "BGR;565", b"\x00\n\x00\x1c", [(0, 64, 8), (0, 129, 24)]),
        ("RGB", "BGR", 3, [(3, 2, 1), (6, 5, 4), (9, 8, 7)]),
        ("RGB", "BGRX", b"\x01\x02\x03\x00\x05\x06\x07\x00", [(3, 2, 1), (7, 6, 5)]),
        ("RGB", "XBGR", b"\x00\x02\x03\x04\x00\x06\x07\x08", [(4, 3, 2), (8, 7, 6)]),
        ("RGB", "RGB;L", 3, [(1, 4, 7), (2, 5, 8), (3, 6, 9)]),
        ("RGB", "R", 1, [(1, 9, 9), (2, 9, 9), (3, 9, 9)]),
        ("RGB", "G", 1, [(9, 1, 9), (9, 2, 9), (9, 3, 9)]),
        ("RGB", "B", 1, [(9, 9, 1), (9, 9, 2), (9, 9, 3)]),
    ]

    # Mode RGBA
    params += [
        ("RGBA", "RGBA", 4, [(1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12)]),
        ("RGBA", "RGBA;L", 4, [(1, 4, 7, 10), (2, 5, 8, 11), (3, 6, 9, 12)]),
        ("RGBA", "RGB", 3, [(1, 2, 3, 14), (4, 5, 6, 15), (7, 8, 9, 16)]),
        ("RGBA", "BGR", 3, [(3, 2, 1, 14), (6, 5, 4, 15), (9, 8, 7, 16)]),
        ("RGBA", "BGRA", 4, [(3, 2, 1, 4), (7, 6, 5, 8), (11, 10, 9, 12)]),
        ("RGBA", "ABGR", 4, [(4, 3, 2, 1), (8, 7, 6, 5), (12, 11, 10, 9)]),
        (
            "RGBA",
            "BGRa",
            4,
            [(191, 127, 63, 4), (223, 191, 159, 8), (233, 212, 191, 12)],
        ),
        ("RGBA", "R", 1, [(1, 0, 8, 9), (2, 0, 8, 9), (3, 0, 8, 0)]),
        ("RGBA", "G", 1, [(6, 1, 8, 9), (6, 2, 8, 9), (6, 3, 8, 9)]),
        ("RGBA", "B", 1, [(6, 7, 1, 9), (6, 7, 2, 0), (6, 7, 3, 9)]),
        ("RGBA", "A", 1, [(6, 7, 0, 1), (6, 7, 0, 2), (0, 7, 0, 3)]),
    ]

    # Mode RGBa
    params += [
        ("RGBa", "RGBa", 4, [(1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12)]),
        ("RGBa", "BGRa", 4, [(3, 2, 1, 4), (7, 6, 5, 8), (11, 10, 9, 12)]),
        ("RGBa", "aBGR", 4, [(4, 3, 2, 1), (8, 7, 6, 5), (12, 11, 10, 9)]),
    ]

    # Mode RGBX
    params += [
        ("RGBX", "RGBX", 4, [(1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12)]),
        ("RGBX", "RGBX;L", 4, [(1, 4, 7, 10), (2, 5, 8, 11), (3, 6, 9, 12)]),
        ("RGBX", "RGB", 3, [(1, 2, 3, X), (4, 5, 6, X), (7, 8, 9, X)]),
        ("RGBX", "BGR", 3, [(3, 2, 1, X), (6, 5, 4, X), (9, 8, 7, X)]),
        (
            "RGBX",
            "BGRX",
            b"\x01\x02\x03\x00\x05\x06\x07\x00\t\n\x0b\x00",
            [(3, 2, 1, X), (7, 6, 5, X), (11, 10, 9, X)],
        ),
        (
            "RGBX",
            "XBGR",
            b"\x00\x02\x03\x04\x00\x06\x07\x08\x00\n\x0b\x0c",
            [(4, 3, 2, X), (8, 7, 6, X), (12, 11, 10, X)],
        ),
        ("RGBX", "R", 1, [(1, 0, 8, 9), (2, 0, 8, 9), (3, 0, 8, 0)]),
        ("RGBX", "G", 1, [(6, 1, 8, 9), (6, 2, 8, 9), (6, 3, 8, 9)]),
        ("RGBX", "B", 1, [(6, 7, 1, 9), (6, 7, 2, 0), (6, 7, 3, 9)]),
        ("RGBX", "X", 1, [(6, 7, 0, 1), (6, 7, 0, 2), (0, 7, 0, 3)]),
    ]

    # Mode CMYK
    params += [
        ("CMYK", "CMYK", 4, [(1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12)]),
        (
            "CMYK",
            "CMYK;I",
            4,
            [(254, 253, 252, 251), (250, 249, 248, 247), (246, 245, 244, 243)],
        ),
        ("CMYK", "CMYK;L", 4, [(1, 4, 7, 10), (2, 5, 8, 11), (3, 6, 9, 12)]),
        ("CMYK", "K", 1, [(6, 7, 0, 1), (6, 7, 0, 2), (0, 7, 0, 3)]),
    ]

    # Mode YCbCr
    params += [
        ("YCbCr", "YCbCr", 3, [(1, 2, 3), (4, 5, 6), (7, 8, 9)]),
        ("YCbCr", "YCbCr;L", 3, [(1, 4, 7), (2, 5, 8), (3, 6, 9)]),
        (
            "YCbCr",
            "YCbCrX",
            b"\x01\x02\x03\xff\x05\x06\x07\xff\t\n\x0b\xff",
            [(1, 2, 3), (5, 6, 7), (9, 10, 11)],
        ),
        (
            "YCbCr",
            "YCbCrK",
            b"\x01\x02\x03\xff\x05\x06\x07\xff\t\n\x0b\xff",
            [(1, 2, 3), (5, 6, 7), (9, 10, 11)],
        ),
        ("YCbCr", "Y", 1, [(1, 0, 8, 9), (2, 0, 8, 9), (3, 0, 8, 0)]),
        ("YCbCr", "Cb", 1, [(6, 1, 8, 9), (6, 2, 8, 9), (6, 3, 8, 9)]),
        ("YCbCr", "Cr", 1, [(6, 7, 1, 9), (6, 7, 2, 0), (6, 7, 3, 9)]),
    ]

    # Mode LAB
    params += [
        ("LAB", "LAB", 3, [(1, 130, 131), (4, 133, 134), (7, 136, 137)]),
        ("LAB", "L", 1, [(1, 9, 9), (2, 9, 9), (3, 9, 9)]),
        ("LAB", "A", 1, [(9, 1, 9), (9, 2, 9), (9, 3, 9)]),
        ("LAB", "B", 1, [(9, 9, 1), (9, 9, 2), (9, 9, 3)]),
    ]

    # Mode HSV
    params += [
        ("HSV", "HSV", 3, [(1, 2, 3), (4, 5, 6), (7, 8, 9)]),
        ("HSV", "H", 1, [(1, 9, 9), (2, 9, 9), (3, 9, 9)]),
        ("HSV", "S", 1, [(9, 1, 9), (9, 2, 9), (9, 3, 9)]),
        ("HSV", "V", 1, [(9, 9, 1), (9, 9, 2), (9, 9, 3)]),
    ]

    # Mode I
    params += [
        ("I", "I;16B", 2, [0x0102, 0x0304]),
        ("I", "I;32S", b"\x83\x00\x00\x01\x01\x00\x00\x83", [0x01000083, -2097151999]),
    ]
    if is_big_endian():
        params += [
            ("I", "I", 4, [0x01020304, 0x05060708]),
            (
                "I",
                "I;32NS",
                b"\x83\x00\x00\x01\x01\x00\x00\x83",
                [-2097151999, 0x01000083],
            ),
        ]
    else:
        params += [
            ("I", "I", 4, [0x04030201, 0x08070605]),
            (
                "I",
                "I;32NS",
                b"\x83\x00\x00\x01\x01\x00\x00\x83",
                [0x01000083, -2097151999],
            ),
        ]

    # Mode I;16
    if is_big_endian():
        params += [("I;16N", "I;16N", 2, [0x0102, 0x0304, 0x0506])]
    else:
        params += [("I;16N", "I;16N", 2, [0x0201, 0x0403, 0x0605])]

    # Mode F float
    params += [
        ("F", "F;32F", 4, [1.539989614439558e-36, 4.063216068939723e-34]),
    ]
    if is_big_endian():
        params += [
            ("F", "F", 4, [2.387939260590663e-38, 6.301941157072183e-36]),
            ("F", "F;32NF", 4, [2.387939260590663e-38, 6.301941157072183e-36]),
        ]
    else:
        params += [
            ("F", "F", 4, [1.539989614439558e-36, 4.063216068939723e-34]),
            ("F", "F;32NF", 4, [1.539989614439558e-36, 4.063216068939723e-34]),
        ]

    return params


@pytest.mark.parametrize("mode, rawmode, data, pixels", get_pack_parameters())
def test_pack(
    mode: str, rawmode: str, data: bytes | int, pixels: list[float | tuple[int, ...]]
) -> None:
    """
    Test packing from {mode} to {rawmode}.
    data - Either the number of bytes in a pixel of the rawmode, or a byte string.
           If a number is given, bytes will be generated starting at 1.
           The byte string will be compared against the pack result.
    pixels - The pixels to populate the starting image with.
    """
    im = Image.new(mode, (len(pixels), 1))
    for x, pixel in enumerate(pixels):
        im.putpixel((x, 0), pixel)

    if isinstance(data, int):
        data_len = data * len(pixels)
        data = bytes(range(1, data_len + 1))

    assert data == im.tobytes("raw", rawmode)


def get_unpack_parameters() -> UnPackParamTypes:
    params: UnPackParamTypes = []

    # Mode 1
    params += [
        ("1", "1", b"\x01", [0, 0, 0, 0, 0, 0, 0, X]),
        ("1", "1;I", b"\x01", [X, X, X, X, X, X, X, 0]),
        ("1", "1;R", b"\x01", [X, 0, 0, 0, 0, 0, 0, 0]),
        ("1", "1;IR", b"\x01", [0, X, X, X, X, X, X, X]),
        ("1", "1", b"\xaa", [X, 0, X, 0, X, 0, X, 0]),
        ("1", "1;I", b"\xaa", [0, X, 0, X, 0, X, 0, X]),
        ("1", "1;R", b"\xaa", [0, X, 0, X, 0, X, 0, X]),
        ("1", "1;IR", b"\xaa", [X, 0, X, 0, X, 0, X, 0]),
        ("1", "1;8", b"\x00\x01\x02\xff", [0, X, X, X]),
    ]

    # Mode L
    params += [
        ("L", "L;2", b"\xe4", [255, 170, 85, 0]),
        ("L", "L;2I", b"\xe4", [0, 85, 170, 255]),
        ("L", "L;2R", b"\xe4", [0, 170, 85, 255]),
        ("L", "L;2IR", b"\xe4", [255, 85, 170, 0]),
        ("L", "L;4", b"\x02\xef", [0, 34, 238, 255]),
        ("L", "L;4I", b"\x02\xef", [255, 221, 17, 0]),
        ("L", "L;4R", b"\x02\xef", [68, 0, 255, 119]),
        ("L", "L;4IR", b"\x02\xef", [187, 255, 0, 136]),
        ("L", "L", 1, [1, 2, 3, 4]),
        ("L", "L;I", 1, [254, 253, 252, 251]),
        ("L", "L;R", 1, [128, 64, 192, 32]),
        ("L", "L;16", 2, [2, 4, 6, 8]),
        ("L", "L;16B", 2, [1, 3, 5, 7]),
        ("L", "L;16", b"\x00\xc6\x00\xaf", [198, 175]),
        ("L", "L;16B", b"\xc6\x00\xaf\x00", [198, 175]),
    ]

    # Mode LA
    params += [
        ("LA", "LA", 2, [(1, 2), (3, 4), (5, 6)]),
        ("LA", "LA;L", 2, [(1, 4), (2, 5), (3, 6)]),
    ]

    # Mode La
    params += [
        ("La", "La", 2, [(1, 2), (3, 4), (5, 6)]),
    ]

    # Mode P
    params += [
        ("P", "P;1", b"\xe4", [1, 1, 1, 0, 0, 1, 0, 0]),
        ("P", "P;2", b"\xe4", [3, 2, 1, 0]),
        # erroneous?
        # ("P", "P;2L", b"\xe4", [1, 1, 1, 0]),
        ("P", "P;4", b"\x02\xef", [0, 2, 14, 15]),
        # erroneous?
        # ("P", "P;4L", b"\x02\xef", [2, 10, 10, 0]),
        ("P", "P", 1, [1, 2, 3, 4]),
        ("P", "P;R", 1, [128, 64, 192, 32]),
    ]

    # Mode PA
    params += [
        ("PA", "PA", 2, [(1, 2), (3, 4), (5, 6)]),
        ("PA", "PA;L", 2, [(1, 4), (2, 5), (3, 6)]),
    ]

    # Mode RGB
    params += [
        ("RGB", "RGB", 3, [(1, 2, 3), (4, 5, 6), (7, 8, 9)]),
        ("RGB", "RGB;L", 3, [(1, 4, 7), (2, 5, 8), (3, 6, 9)]),
        ("RGB", "RGB;R", 3, [(128, 64, 192), (32, 160, 96)]),
        ("RGB", "RGB;16L", 6, [(2, 4, 6), (8, 10, 12)]),
        ("RGB", "RGB;16B", 6, [(1, 3, 5), (7, 9, 11)]),
        ("RGB", "BGR", 3, [(3, 2, 1), (6, 5, 4), (9, 8, 7)]),
        ("RGB", "XRGB;1555", 2, [(0, 132, 8), (8, 0, 24)]),
        ("RGB", "ARGB;1555", 2, [(0, 132, 8), (8, 0, 24)]),
        ("RGB", "ARGB;1555Z", 2, [(0, 132, 8), (8, 0, 24)]),
        ("RGB", "XBGR;1555", 2, [(8, 132, 0), (24, 0, 8)]),
        ("RGB", "ABGR;1555", 2, [(8, 132, 0), (24, 0, 8)]),
        ("RGB", "RGB;565", 2, [(0, 65, 8), (0, 130, 24)]),
        ("RGB", "BGR;565", 2, [(8, 65, 0), (24, 130, 0)]),
        ("RGB", "XBGR;4", 2, [(17, 0, 34), (51, 0, 68)]),
        ("RGB", "ABGR;4", 2, [(17, 0, 34), (51, 0, 68)]),
        ("RGB", "RGBX", 4, [(1, 2, 3), (5, 6, 7), (9, 10, 11)]),
        ("RGB", "RGBX;L", 4, [(1, 4, 7), (2, 5, 8), (3, 6, 9)]),
        ("RGB", "BGRX", 4, [(3, 2, 1), (7, 6, 5), (11, 10, 9)]),
        ("RGB", "XRGB", 4, [(2, 3, 4), (6, 7, 8), (10, 11, 12)]),
        ("RGB", "XBGR", 4, [(4, 3, 2), (8, 7, 6), (12, 11, 10)]),
        (
            "RGB",
            "YCC;P",
            b"D]\x9c\x82\x1a\x91\xfaOC\xe7J\x12",  # random data
            [(127, 102, 0), (192, 227, 0), (213, 255, 170), (98, 255, 133)],
        ),
        ("RGB", "R", 1, [(1, 0, 0), (2, 0, 0), (3, 0, 0)]),
        ("RGB", "G", 1, [(0, 1, 0), (0, 2, 0), (0, 3, 0)]),
        ("RGB", "B", 1, [(0, 0, 1), (0, 0, 2), (0, 0, 3)]),
        ("RGB", "R;16B", 2, [(1, 0, 0), (3, 0, 0), (5, 0, 0)]),
        ("RGB", "G;16B", 2, [(0, 1, 0), (0, 3, 0), (0, 5, 0)]),
        ("RGB", "B;16B", 2, [(0, 0, 1), (0, 0, 3), (0, 0, 5)]),
        ("RGB", "R;16L", 2, [(2, 0, 0), (4, 0, 0), (6, 0, 0)]),
        ("RGB", "G;16L", 2, [(0, 2, 0), (0, 4, 0), (0, 6, 0)]),
        ("RGB", "B;16L", 2, [(0, 0, 2), (0, 0, 4), (0, 0, 6)]),
    ]

    if is_big_endian():
        params += [
            ("RGB", "R;16N", 2, [(1, 0, 0), (3, 0, 0), (5, 0, 0)]),
            ("RGB", "G;16N", 2, [(0, 1, 0), (0, 3, 0), (0, 5, 0)]),
            ("RGB", "B;16N", 2, [(0, 0, 1), (0, 0, 3), (0, 0, 5)]),
        ]
    else:
        params += [
            ("RGB", "R;16N", 2, [(2, 0, 0), (4, 0, 0), (6, 0, 0)]),
            ("RGB", "G;16N", 2, [(0, 2, 0), (0, 4, 0), (0, 6, 0)]),
            ("RGB", "B;16N", 2, [(0, 0, 2), (0, 0, 4), (0, 0, 6)]),
        ]

    params += [
        ("RGB", "CMYK", 4, [(250, 249, 248), (242, 241, 240), (234, 233, 233)]),
    ]

    # Mode RGBA
    params += [
        ("RGBA", "LA", 2, [(1, 1, 1, 2), (3, 3, 3, 4), (5, 5, 5, 6)]),
        ("RGBA", "LA;16B", 4, [(1, 1, 1, 3), (5, 5, 5, 7), (9, 9, 9, 11)]),
        ("RGBA", "RGBA", 4, [(1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12)]),
        ("RGBA", "RGBAX", 5, [(1, 2, 3, 4), (6, 7, 8, 9), (11, 12, 13, 14)]),
        ("RGBA", "RGBAXX", 6, [(1, 2, 3, 4), (7, 8, 9, 10), (13, 14, 15, 16)]),
        (
            "RGBA",
            "RGBa",
            4,
            [
                (63, 127, 191, 4),
                (159, 191, 223, 8),
                (191, 212, 233, 12),
            ],
        ),
        (
            "RGBA",
            "RGBa",
            b"\x01\x02\x03\x00\x10\x20\x30\x7f\x10\x20\x30\xff",
            [
                (0, 0, 0, 0),
                (32, 64, 96, 127),
                (16, 32, 48, 255),
            ],
        ),
        (
            "RGBA",
            "RGBaX",
            b"\x01\x02\x03\x00-\x10\x20\x30\x7f-\x10\x20\x30\xff-",
            [
                (0, 0, 0, 0),
                (32, 64, 96, 127),
                (16, 32, 48, 255),
            ],
        ),
        (
            "RGBA",
            "RGBaXX",
            b"\x01\x02\x03\x00==\x10\x20\x30\x7f!!\x10\x20\x30\xff??",
            [
                (0, 0, 0, 0),
                (32, 64, 96, 127),
                (16, 32, 48, 255),
            ],
        ),
        (
            "RGBA",
            "RGBa;16L",
            8,
            [
                (63, 127, 191, 8),
                (159, 191, 223, 16),
                (191, 212, 233, 24),
            ],
        ),
        (
            "RGBA",
            "RGBa;16L",
            b"\x88\x01\x88\x02\x88\x03\x88\x00\x88\x10\x88\x20\x88\x30\x88\xff",
            [
                (0, 0, 0, 0),
                (16, 32, 48, 255),
            ],
        ),
        (
            "RGBA",
            "RGBa;16B",
            8,
            [
                (36, 109, 182, 7),
                (153, 187, 221, 15),
                (188, 210, 232, 23),
            ],
        ),
        (
            "RGBA",
            "RGBa;16B",
            b"\x01\x88\x02\x88\x03\x88\x00\x88\x10\x88\x20\x88\x30\x88\xff\x88",
            [
                (0, 0, 0, 0),
                (16, 32, 48, 255),
            ],
        ),
        (
            "RGBA",
            "BGRa",
            4,
            [
                (191, 127, 63, 4),
                (223, 191, 159, 8),
                (233, 212, 191, 12),
            ],
        ),
        (
            "RGBA",
            "BGRa",
            b"\x01\x02\x03\x00\x10\x20\x30\xff",
            [
                (0, 0, 0, 0),
                (48, 32, 16, 255),
            ],
        ),
        (
            "RGBA",
            "RGBA;I",
            4,
            [
                (254, 253, 252, 4),
                (250, 249, 248, 8),
                (246, 245, 244, 12),
            ],
        ),
        ("RGBA", "RGBA;L", 4, [(1, 4, 7, 10), (2, 5, 8, 11), (3, 6, 9, 12)]),
        ("RGBA", "ARGB;1555", 2, [(0, 132, 8, 0), (8, 0, 24, 0)]),
        ("RGBA", "ARGB;1555Z", 2, [(0, 132, 8, X), (8, 0, 24, X)]),
        ("RGBA", "ABGR;1555", 2, [(8, 132, 0, 0), (24, 0, 8, 0)]),
        ("RGBA", "ABGR;4", 2, [(17, 0, 34, 0), (51, 0, 68, 0)]),
        ("RGBA", "RGBA;16L", 8, [(2, 4, 6, 8), (10, 12, 14, 16)]),
        ("RGBA", "RGBA;16B", 8, [(1, 3, 5, 7), (9, 11, 13, 15)]),
        ("RGBA", "BGRA;16L", 8, [(6, 4, 2, 8), (14, 12, 10, 16)]),
        ("RGBA", "BGRA;16B", 8, [(5, 3, 1, 7), (13, 11, 9, 15)]),
        ("RGBA", "BGRA", 4, [(3, 2, 1, 4), (7, 6, 5, 8), (11, 10, 9, 12)]),
        ("RGBA", "ARGB", 4, [(2, 3, 4, 1), (6, 7, 8, 5), (10, 11, 12, 9)]),
        ("RGBA", "ABGR", 4, [(4, 3, 2, 1), (8, 7, 6, 5), (12, 11, 10, 9)]),
        (
            "RGBA",
            "YCCA;P",
            b"]bE\x04\xdd\xbej\xed57T\xce\xac\xce:\x11",  # random data
            [
                (0, 161, 0, 4),
                (255, 255, 255, 237),
                (27, 158, 0, 206),
                (0, 118, 0, 17),
            ],
        ),
        ("RGBA", "R", 1, [(1, 0, 0, 0), (2, 0, 0, 0), (3, 0, 0, 0)]),
        ("RGBA", "G", 1, [(0, 1, 0, 0), (0, 2, 0, 0), (0, 3, 0, 0)]),
        ("RGBA", "B", 1, [(0, 0, 1, 0), (0, 0, 2, 0), (0, 0, 3, 0)]),
        ("RGBA", "A", 1, [(0, 0, 0, 1), (0, 0, 0, 2), (0, 0, 0, 3)]),
        ("RGBA", "R;16B", 2, [(1, 0, 0, 0), (3, 0, 0, 0), (5, 0, 0, 0)]),
        ("RGBA", "G;16B", 2, [(0, 1, 0, 0), (0, 3, 0, 0), (0, 5, 0, 0)]),
        ("RGBA", "B;16B", 2, [(0, 0, 1, 0), (0, 0, 3, 0), (0, 0, 5, 0)]),
        ("RGBA", "A;16B", 2, [(0, 0, 0, 1), (0, 0, 0, 3), (0, 0, 0, 5)]),
        ("RGBA", "R;16L", 2, [(2, 0, 0, 0), (4, 0, 0, 0), (6, 0, 0, 0)]),
        ("RGBA", "G;16L", 2, [(0, 2, 0, 0), (0, 4, 0, 0), (0, 6, 0, 0)]),
        ("RGBA", "B;16L", 2, [(0, 0, 2, 0), (0, 0, 4, 0), (0, 0, 6, 0)]),
        ("RGBA", "A;16L", 2, [(0, 0, 0, 2), (0, 0, 0, 4), (0, 0, 0, 6)]),
    ]

    if is_big_endian():
        params += [
            ("RGBA", "R;16N", 2, [(1, 0, 0, 0), (3, 0, 0, 0), (5, 0, 0, 0)]),
            ("RGBA", "G;16N", 2, [(0, 1, 0, 0), (0, 3, 0, 0), (0, 5, 0, 0)]),
            ("RGBA", "B;16N", 2, [(0, 0, 1, 0), (0, 0, 3, 0), (0, 0, 5, 0)]),
            ("RGBA", "A;16N", 2, [(0, 0, 0, 1), (0, 0, 0, 3), (0, 0, 0, 5)]),
        ]
    else:
        params += [
            ("RGBA", "R;16N", 2, [(2, 0, 0, 0), (4, 0, 0, 0), (6, 0, 0, 0)]),
            ("RGBA", "G;16N", 2, [(0, 2, 0, 0), (0, 4, 0, 0), (0, 6, 0, 0)]),
            ("RGBA", "B;16N", 2, [(0, 0, 2, 0), (0, 0, 4, 0), (0, 0, 6, 0)]),
            ("RGBA", "A;16N", 2, [(0, 0, 0, 2), (0, 0, 0, 4), (0, 0, 0, 6)]),
        ]

    # Mode RGBa
    params += [
        ("RGBa", "RGBa", 4, [(1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12)]),
        ("RGBa", "BGRa", 4, [(3, 2, 1, 4), (7, 6, 5, 8), (11, 10, 9, 12)]),
        ("RGBa", "aRGB", 4, [(2, 3, 4, 1), (6, 7, 8, 5), (10, 11, 12, 9)]),
        ("RGBa", "aBGR", 4, [(4, 3, 2, 1), (8, 7, 6, 5), (12, 11, 10, 9)]),
    ]

    # Mode RGBX
    params += [
        ("RGBX", "RGB", 3, [(1, 2, 3, X), (4, 5, 6, X), (7, 8, 9, X)]),
        ("RGBX", "RGB;L", 3, [(1, 4, 7, X), (2, 5, 8, X), (3, 6, 9, X)]),
        ("RGBX", "RGB;16B", 6, [(1, 3, 5, X), (7, 9, 11, X)]),
        ("RGBX", "BGR", 3, [(3, 2, 1, X), (6, 5, 4, X), (9, 8, 7, X)]),
        ("RGBX", "XRGB;1555", 2, [(0, 132, 8, X), (8, 0, 24, X)]),
        ("RGBX", "RGB;565", 2, [(0, 65, 8, X), (0, 130, 24, X)]),
        ("RGBX", "XBGR;1555", 2, [(8, 132, 0, X), (24, 0, 8, X)]),
        ("RGBX", "BGR;565", 2, [(8, 65, 0, X), (24, 130, 0, X)]),
        ("RGBX", "XBGR;4", 2, [(17, 0, 34, X), (51, 0, 68, X)]),
        ("RGBX", "RGBX", 4, [(1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12)]),
        ("RGBX", "RGBXX", 5, [(1, 2, 3, 4), (6, 7, 8, 9), (11, 12, 13, 14)]),
        ("RGBX", "RGBXXX", 6, [(1, 2, 3, 4), (7, 8, 9, 10), (13, 14, 15, 16)]),
        ("RGBX", "RGBX;L", 4, [(1, 4, 7, 10), (2, 5, 8, 11), (3, 6, 9, 12)]),
        ("RGBX", "RGBX;16L", 8, [(2, 4, 6, 8), (10, 12, 14, 16)]),
        ("RGBX", "RGBX;16B", 8, [(1, 3, 5, 7), (9, 11, 13, 15)]),
        ("RGBX", "BGRX", 4, [(3, 2, 1, X), (7, 6, 5, X), (11, 10, 9, X)]),
        ("RGBX", "XRGB", 4, [(2, 3, 4, X), (6, 7, 8, X), (10, 11, 12, X)]),
        ("RGBX", "XBGR", 4, [(4, 3, 2, X), (8, 7, 6, X), (12, 11, 10, X)]),
        (
            "RGBX",
            "YCC;P",
            b"D]\x9c\x82\x1a\x91\xfaOC\xe7J\x12",  # random data
            [
                (127, 102, 0, X),
                (192, 227, 0, X),
                (213, 255, 170, X),
                (98, 255, 133, X),
            ],
        ),
        ("RGBX", "R", 1, [(1, 0, 0, 0), (2, 0, 0, 0), (3, 0, 0, 0)]),
        ("RGBX", "G", 1, [(0, 1, 0, 0), (0, 2, 0, 0), (0, 3, 0, 0)]),
        ("RGBX", "B", 1, [(0, 0, 1, 0), (0, 0, 2, 0), (0, 0, 3, 0)]),
        ("RGBX", "X", 1, [(0, 0, 0, 1), (0, 0, 0, 2), (0, 0, 0, 3)]),
    ]

    # Mode CMYK
    params += [
        ("CMYK", "CMYK", 4, [(1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12)]),
        ("CMYK", "CMYKX", 5, [(1, 2, 3, 4), (6, 7, 8, 9), (11, 12, 13, 14)]),
        ("CMYK", "CMYKXX", 6, [(1, 2, 3, 4), (7, 8, 9, 10), (13, 14, 15, 16)]),
        (
            "CMYK",
            "CMYK;I",
            4,
            [
                (254, 253, 252, 251),
                (250, 249, 248, 247),
                (246, 245, 244, 243),
            ],
        ),
        ("CMYK", "CMYK;L", 4, [(1, 4, 7, 10), (2, 5, 8, 11), (3, 6, 9, 12)]),
        ("CMYK", "C", 1, [(1, 0, 0, 0), (2, 0, 0, 0), (3, 0, 0, 0)]),
        ("CMYK", "M", 1, [(0, 1, 0, 0), (0, 2, 0, 0), (0, 3, 0, 0)]),
        ("CMYK", "Y", 1, [(0, 0, 1, 0), (0, 0, 2, 0), (0, 0, 3, 0)]),
        ("CMYK", "K", 1, [(0, 0, 0, 1), (0, 0, 0, 2), (0, 0, 0, 3)]),
        ("CMYK", "C;I", 1, [(254, 0, 0, 0), (253, 0, 0, 0), (252, 0, 0, 0)]),
        ("CMYK", "M;I", 1, [(0, 254, 0, 0), (0, 253, 0, 0), (0, 252, 0, 0)]),
        ("CMYK", "Y;I", 1, [(0, 0, 254, 0), (0, 0, 253, 0), (0, 0, 252, 0)]),
        ("CMYK", "K;I", 1, [(0, 0, 0, 254), (0, 0, 0, 253), (0, 0, 0, 252)]),
    ]

    # Mode YCbCr
    params += [
        ("YCbCr", "YCbCr", 3, [(1, 2, 3), (4, 5, 6), (7, 8, 9)]),
        ("YCbCr", "YCbCr;L", 3, [(1, 4, 7), (2, 5, 8), (3, 6, 9)]),
        ("YCbCr", "YCbCrK", 4, [(1, 2, 3), (5, 6, 7), (9, 10, 11)]),
        ("YCbCr", "YCbCrX", 4, [(1, 2, 3), (5, 6, 7), (9, 10, 11)]),
    ]

    # Mode LAB
    params += [
        ("LAB", "LAB", 3, [(1, 130, 131), (4, 133, 134), (7, 136, 137)]),
        ("LAB", "L", 1, [(1, 0, 0), (2, 0, 0), (3, 0, 0)]),
        ("LAB", "A", 1, [(0, 1, 0), (0, 2, 0), (0, 3, 0)]),
        ("LAB", "B", 1, [(0, 0, 1), (0, 0, 2), (0, 0, 3)]),
    ]

    # Mode HSV
    params += [
        ("HSV", "HSV", 3, [(1, 2, 3), (4, 5, 6), (7, 8, 9)]),
        ("HSV", "H", 1, [(1, 0, 0), (2, 0, 0), (3, 0, 0)]),
        ("HSV", "S", 1, [(0, 1, 0), (0, 2, 0), (0, 3, 0)]),
        ("HSV", "V", 1, [(0, 0, 1), (0, 0, 2), (0, 0, 3)]),
    ]

    # Mode I
    params += [
        ("I", "I;8", 1, [0x01, 0x02, 0x03, 0x04]),
        ("I", "I;8S", b"\x01\x83", [1, -125]),
        ("I", "I;16", 2, [0x0201, 0x0403]),
        ("I", "I;16S", b"\x83\x01\x01\x83", [0x0183, -31999]),
        ("I", "I;16B", 2, [0x0102, 0x0304]),
        ("I", "I;16BS", b"\x83\x01\x01\x83", [-31999, 0x0183]),
        ("I", "I;32", 4, [0x04030201, 0x08070605]),
        ("I", "I;32S", b"\x83\x00\x00\x01\x01\x00\x00\x83", [0x01000083, -2097151999]),
        ("I", "I;32B", 4, [0x01020304, 0x05060708]),
        ("I", "I;32BS", b"\x83\x00\x00\x01\x01\x00\x00\x83", [-2097151999, 0x01000083]),
    ]
    if is_big_endian():
        params += [
            ("I", "I", 4, [0x01020304, 0x05060708]),
            ("I", "I;16N", 2, [0x0102, 0x0304]),
            ("I", "I;16NS", b"\x83\x01\x01\x83", [-31999, 0x0183]),
            ("I", "I;32N", 4, [0x01020304, 0x05060708]),
            (
                "I",
                "I;32NS",
                b"\x83\x00\x00\x01\x01\x00\x00\x83",
                [
                    -2097151999,
                    0x01000083,
                ],
            ),
        ]
    else:
        params += [
            ("I", "I", 4, [0x04030201, 0x08070605]),
            ("I", "I;16N", 2, [0x0201, 0x0403]),
            ("I", "I;16NS", b"\x83\x01\x01\x83", [0x0183, -31999]),
            ("I", "I;32N", 4, [0x04030201, 0x08070605]),
            (
                "I",
                "I;32NS",
                b"\x83\x00\x00\x01\x01\x00\x00\x83",
                [
                    0x01000083,
                    -2097151999,
                ],
            ),
        ]

    # Mode F int
    params += [
        ("F", "F;8", 1, [0x01, 0x02, 0x03, 0x04]),
        ("F", "F;8S", b"\x01\x83", [1, -125]),
        ("F", "F;16", 2, [0x0201, 0x0403]),
        ("F", "F;16S", b"\x83\x01\x01\x83", [0x0183, -31999]),
        ("F", "F;16B", 2, [0x0102, 0x0304]),
        ("F", "F;16BS", b"\x83\x01\x01\x83", [-31999, 0x0183]),
        ("F", "F;32", 4, [67305984, 134678016]),
        ("F", "F;32S", b"\x83\x00\x00\x01\x01\x00\x00\x83", [16777348, -2097152000]),
        ("F", "F;32B", 4, [0x01020304, 0x05060708]),
        ("F", "F;32BS", b"\x83\x00\x00\x01\x01\x00\x00\x83", [-2097152000, 16777348]),
    ]
    if is_big_endian():
        params += [
            ("F", "F;16N", 2, [0x0102, 0x0304]),
            ("F", "F;16NS", b"\x83\x01\x01\x83", [-31999, 0x0183]),
            ("F", "F;32N", 4, [0x01020304, 0x05060708]),
            (
                "F",
                "F;32NS",
                b"\x83\x00\x00\x01\x01\x00\x00\x83",
                [-2097152000, 16777348],
            ),
        ]
    else:
        params += [
            ("F", "F;16N", 2, [0x0201, 0x0403]),
            ("F", "F;16NS", b"\x83\x01\x01\x83", [0x0183, -31999]),
            ("F", "F;32N", 4, [67305984, 134678016]),
            (
                "F",
                "F;32NS",
                b"\x83\x00\x00\x01\x01\x00\x00\x83",
                [16777348, -2097152000],
            ),
        ]

    # Mode F float
    params += [
        ("F", "F;32F", 4, [1.539989614439558e-36, 4.063216068939723e-34]),
        ("F", "F;32BF", 4, [2.387939260590663e-38, 6.301941157072183e-36]),
        (
            "F",
            "F;64F",
            b"333333\xc3?\x00\x00\x00\x00\x00J\x93\xc0",  # by struct.pack
            [0.15000000596046448, -1234.5],
        ),
        (
            "F",
            "F;64BF",
            b"?\xc3333333\xc0\x93J\x00\x00\x00\x00\x00",  # by struct.pack
            [0.15000000596046448, -1234.5],
        ),
    ]
    if is_big_endian():
        params += [
            ("F", "F", 4, [2.387939260590663e-38, 6.301941157072183e-36]),
            ("F", "F;32NF", 4, [2.387939260590663e-38, 6.301941157072183e-36]),
            (
                "F",
                "F;64NF",
                b"?\xc3333333\xc0\x93J\x00\x00\x00\x00\x00",
                [0.15000000596046448, -1234.5],
            ),
        ]
    else:
        params += [
            ("F", "F", 4, [1.539989614439558e-36, 4.063216068939723e-34]),
            ("F", "F;32NF", 4, [1.539989614439558e-36, 4.063216068939723e-34]),
            (
                "F",
                "F;64NF",
                b"333333\xc3?\x00\x00\x00\x00\x00J\x93\xc0",
                [0.15000000596046448, -1234.5],
            ),
        ]

    # Mode I;16
    params += [
        ("I;16", "I;16", 2, [0x0201, 0x0403, 0x0605]),
        ("I;16", "I;16B", 2, [0x0102, 0x0304, 0x0506]),
        ("I;16B", "I;16B", 2, [0x0102, 0x0304, 0x0506]),
        ("I;16L", "I;16L", 2, [0x0201, 0x0403, 0x0605]),
        ("I;16", "I;12", 2, [0x0010, 0x0203, 0x0040]),
    ]
    if is_big_endian():
        params += [
            ("I;16", "I;16N", 2, [0x0102, 0x0304, 0x0506]),
            ("I;16B", "I;16N", 2, [0x0102, 0x0304, 0x0506]),
            ("I;16L", "I;16N", 2, [0x0102, 0x0304, 0x0506]),
            ("I;16N", "I;16N", 2, [0x0102, 0x0304, 0x0506]),
        ]
    else:
        params += [
            ("I;16", "I;16N", 2, [0x0201, 0x0403, 0x0605]),
            ("I;16B", "I;16N", 2, [0x0201, 0x0403, 0x0605]),
            ("I;16L", "I;16N", 2, [0x0201, 0x0403, 0x0605]),
            ("I;16N", "I;16N", 2, [0x0201, 0x0403, 0x0605]),
        ]

    # Mode CMYK
    params += [
        ("CMYK", "CMYK;16L", 8, [(2, 4, 6, 8), (10, 12, 14, 16)]),
        ("CMYK", "CMYK;16B", 8, [(1, 3, 5, 7), (9, 11, 13, 15)]),
    ]
    if is_big_endian():
        params += [
            ("CMYK", "CMYK;16N", 8, [(1, 3, 5, 7), (9, 11, 13, 15)]),
        ]
    else:
        params += [
            ("CMYK", "CMYK;16N", 8, [(2, 4, 6, 8), (10, 12, 14, 16)]),
        ]

    return params


@pytest.mark.parametrize("mode, rawmode, data, pixels", get_unpack_parameters())
def test_unpack(
    mode: str, rawmode: str, data: bytes | int, pixels: list[float | tuple[int, ...]]
) -> None:
    """
    Test unpacking from {rawmode} to {mode}.
    data - Either the number of bytes in a pixel of the rawmode, or a byte string.
           If a number is given, bytes will be generated starting at 1.
           The byte string will be used to populate the starting image.
    pixels - The pixels to be compared against the image pixels after unpacking.
    """
    if isinstance(data, int):
        data_len = data * len(pixels)
        data = bytes(range(1, data_len + 1))

    im = Image.frombytes(mode, (len(pixels), 1), data, "raw", rawmode, 0, 1)

    for x, pixel in enumerate(pixels):
        assert pixel == im.getpixel((x, 0))


@pytest.mark.parametrize(
    "mode, rawmode, data, pixels",
    (
        # Mode BGR
        ("BGR;15", "BGR;15", 3, [(8, 131, 0), (24, 0, 8), (41, 131, 8)]),
        ("BGR;16", "BGR;16", 3, [(8, 64, 0), (24, 129, 0), (41, 194, 0)]),
        ("BGR;24", "BGR;24", 3, [(1, 2, 3), (4, 5, 6), (7, 8, 9)]),
        # Rawmode RGB/BGR/RGBA/BGRA 15/16/4B
        ("RGB", "RGB;15", 2, [(8, 131, 0), (24, 0, 8)]),
        ("RGB", "BGR;15", 2, [(0, 131, 8), (8, 0, 24)]),
        ("RGB", "RGB;16", 2, [(8, 64, 0), (24, 129, 0)]),
        ("RGB", "BGR;16", 2, [(0, 64, 8), (0, 129, 24)]),
        ("RGB", "RGB;4B", 2, [(17, 0, 34), (51, 0, 68)]),
        ("RGBA", "RGBA;15", 2, [(8, 131, 0, 0), (24, 0, 8, 0)]),
        ("RGBA", "BGRA;15", 2, [(0, 131, 8, 0), (8, 0, 24, 0)]),
        ("RGBA", "BGRA;15Z", 2, [(0, 131, 8, X), (8, 0, 24, X)]),
        ("RGBA", "RGBA;4B", 2, [(17, 0, 34, 0), (51, 0, 68, 0)]),
        ("RGBX", "RGB;15", 2, [(8, 131, 0, X), (24, 0, 8, X)]),
        ("RGBX", "BGR;15", 2, [(0, 131, 8, X), (8, 0, 24, X)]),
        ("RGBX", "RGB;4B", 2, [(17, 0, 34, X), (51, 0, 68, X)]),
    ),
)
def test_unpack_deprecated(
    mode: str, rawmode: str, data: int | bytes, pixels: list[float | tuple[int, ...]]
) -> None:
    with pytest.warns(DeprecationWarning):
        test_unpack(mode, rawmode, data, pixels)


@pytest.mark.parametrize(
    "mode, rawmode, data, pixels",
    (
        ("L", "L", 0, [0]),
        ("RGB", "RGB", 2, [0]),
        ("CMYK", "CMYK", 2, [0]),
    ),
)
def test_unpack_valueerror(
    mode: str, rawmode: str, data: int | bytes, pixels: list[float | tuple[int, ...]]
) -> None:
    with pytest.raises(ValueError):
        test_unpack(mode, rawmode, data, pixels)