/*

 * // Copyright (c) Radzivon Bartoshyk 2/2025. All rights reserved.

 * //

 * // Redistribution and use in source and binary forms, with or without modification,

 * // are permitted provided that the following conditions are met:

 * //

 * // 1.  Redistributions of source code must retain the above copyright notice, this

 * // list of conditions and the following disclaimer.

 * //

 * // 2.  Redistributions in binary form must reproduce the above copyright notice,

 * // this list of conditions and the following disclaimer in the documentation

 * // and/or other materials provided with the distribution.

 * //

 * // 3.  Neither the name of the copyright holder nor the names of its

 * // contributors may be used to endorse or promote products derived from

 * // this software without specific prior written permission.

 * //

 * // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

 * // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

 * // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

 * // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

use crate::matrix::{Matrix3f, Vector3f, Xyz};

use crate::{Chromaticity, Matrix3d, Vector3d, XyY};

pub(crate) const BRADFORD_D: Matrix3d = Matrix3d {

    v: [

        [0.8951, 0.2664, -0.1614],

        [-0.7502, 1.7135, 0.0367],

        [0.0389, -0.0685, 1.0296],

    ],

};

pub(crate) const BRADFORD_F: Matrix3f = BRADFORD_D.to_f32();

#[inline]

pub(crate) const fn compute_chromatic_adaption(

    source_white_point: Xyz,

    dest_white_point: Xyz,

    chad: Matrix3f,

) -> Matrix3f {

    let cone_source_xyz = Vector3f {

        v: [

            source_white_point.x,

            source_white_point.y,

            source_white_point.z,

        ],

    };

    let cone_source_rgb = chad.mul_vector(cone_source_xyz);

    let cone_dest_xyz = Vector3f {

        v: [dest_white_point.x, dest_white_point.y, dest_white_point.z],

    };

    let cone_dest_rgb = chad.mul_vector(cone_dest_xyz);

    let cone = Matrix3f {

        v: [

            [cone_dest_rgb.v[0] / cone_source_rgb.v[0], 0., 0.],

            [0., cone_dest_rgb.v[1] / cone_source_rgb.v[1], 0.],

            [0., 0., cone_dest_rgb.v[2] / cone_source_rgb.v[2]],

        ],

    };

    let chad_inv = chad.inverse();

    let p0 = cone.mat_mul_const(chad);

    chad_inv.mat_mul_const(p0)

}

#[inline]

pub(crate) const fn compute_chromatic_adaption_d(

    source_white_point: Xyz,

    dest_white_point: Xyz,

    chad: Matrix3d,

) -> Matrix3d {

    let cone_source_xyz = Vector3d {

        v: [

            source_white_point.x as f64,

            source_white_point.y as f64,

            source_white_point.z as f64,

        ],

    };

    let cone_source_rgb = chad.mul_vector(cone_source_xyz);

    let cone_dest_xyz = Vector3d {

        v: [

            dest_white_point.x as f64,

            dest_white_point.y as f64,

            dest_white_point.z as f64,

        ],

    };

    let cone_dest_rgb = chad.mul_vector(cone_dest_xyz);

    let cone = Matrix3d {

        v: [

            [cone_dest_rgb.v[0] / cone_source_rgb.v[0], 0., 0.],

            [0., cone_dest_rgb.v[1] / cone_source_rgb.v[1], 0.],

            [0., 0., cone_dest_rgb.v[2] / cone_source_rgb.v[2]],

        ],

    };

    let chad_inv = chad.inverse();

    let p0 = cone.mat_mul_const(chad);

    chad_inv.mat_mul_const(p0)

}

pub const fn adaption_matrix(source_illumination: Xyz, target_illumination: Xyz) -> Matrix3f {

    compute_chromatic_adaption(source_illumination, target_illumination, BRADFORD_F)

}

pub const fn adaption_matrix_d(source_illumination: Xyz, target_illumination: Xyz) -> Matrix3d {

    compute_chromatic_adaption_d(source_illumination, target_illumination, BRADFORD_D)

}

pub const fn adapt_to_d50(r: Matrix3f, source_white_pt: XyY) -> Matrix3f {

    adapt_to_illuminant(r, source_white_pt, Chromaticity::D50.to_xyz())

}

pub const fn adapt_to_d50_d(r: Matrix3d, source_white_pt: XyY) -> Matrix3d {

    adapt_to_illuminant_d(r, source_white_pt, Chromaticity::D50.to_xyz())

}

pub const fn adapt_to_illuminant(

    r: Matrix3f,

    source_white_pt: XyY,

    illuminant_xyz: Xyz,

) -> Matrix3f {

    let bradford = adaption_matrix(source_white_pt.to_xyz(), illuminant_xyz);

    bradford.mat_mul_const(r)

}

pub const fn adapt_to_illuminant_d(

    r: Matrix3d,

    source_white_pt: XyY,

    illuminant_xyz: Xyz,

) -> Matrix3d {

    let bradford = adaption_matrix_d(source_white_pt.to_xyz(), illuminant_xyz);

    bradford.mat_mul_const(r)

}

pub const fn adapt_to_illuminant_xyz(

    r: Matrix3f,

    source_white_pt: Xyz,

    illuminant_xyz: Xyz,

) -> Matrix3f {

    if source_white_pt.y == 0.0 {

        return r;

    }

    let bradford = adaption_matrix(source_white_pt, illuminant_xyz);

    bradford.mat_mul_const(r)

}

pub const fn adapt_to_illuminant_xyz_d(

    r: Matrix3d,

    source_white_pt: Xyz,

    illuminant_xyz: Xyz,

) -> Matrix3d {

    if source_white_pt.y == 0.0 {

        return r;

    }

    let bradford = adaption_matrix_d(source_white_pt, illuminant_xyz);

    bradford.mat_mul_const(r)

}