@use 'sass:color';
@use 'sass:math';
@use 'sass:map';
@use 'sass:list';
@use 'sass:meta';

@use 'iro-sass/src/easing';
@use 'apca';

@function palette($base-color, $levels, $ref-color: $base-color) {
    $base-lch: color.to-space($base-color, oklch);
    $ref-lch: color.to-space($ref-color, oklch);

    $ref-l: color.channel($ref-lch, 'lightness');
    $ref-y: apca.sRGB_to_Y($ref-lch);

    $black-y: apca.sRGB_to_Y(#000);
    $white-y: apca.sRGB_to_Y(#fff);

    $palette: ();

    @each $key, $level in $levels {
        $color: list.nth($level, 1);
        $y: 0;
        $c: 1;
        $h: 0deg;

        @if list.length($level) > 1 {
            $c: list.nth($level, 2);
        }
        @if list.length($level) > 2 {
            $h: list.nth($level, 3);
        }

        @if meta.type-of($color) != 'color' {
            $y: apca.reverse($color, $ref-y);
            $l: color.channel($base-lch, 'lightness');

            @if $y != false {
                $l: color.channel(apca.Y_to_sRGB($y), 'lightness', oklch);
            } @else {
                $y: $ref-y;
            }

            $color: oklch($l ($c * color.channel($base-lch, 'chroma')) ($h + color.channel($base-lch, 'hue')));
        } @else {
            $y: apca.sRGB_to_Y($color);
        }

        $contrast-black: apca.contrast($black-y, $y);
        $contrast-white: apca.contrast($white-y, $y);

        $palette: map.set($palette, $key, $color);
        $palette: map.set($palette, #{$key}-text, if(math.abs($contrast-black) > math.abs($contrast-white), #000, #fff));
    }

    @return $palette;
}

@function transparent-palette($color, $text, $alphas) {
    $palette: (
        --text: $text,
    );

    @each $key, $alpha in $alphas {
        $palette: map.set($palette, $key, rgba($color, $alpha));
    }

    @return $palette;
}