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

@use '@oddbird/blend';
@use '@oddbird/blend/sass/convert' as blend-convert;

@use 'iro-sass/src/index' as iro;
@use 'iro-sass/src/easing' as easing;
@use 'functions/colors' as iro-colors;
@use 'config';

@function color($key, $tree: iro.$props-default-tree, $default: null, $global: false) {
    @return iro.props-get(list.join(--colors, $key), $tree, $default, $global);
}

@function global-color($key, $tree: iro.$props-default-tree, $default: null, $global: true) {
    @return color($key, $tree, $default, $global);
}

@function foreign-color($foreign-key, $key, $tree: iro.$props-default-tree, $default: null, $global: true) {
    @return iro.props-get(list.join($foreign-key --colors, $key), $tree, $default, $global);
}

@function dim($key, $tree: iro.$props-default-tree, $default: null, $global: false) {
    @return iro.props-get(list.join(--dims, $key), $tree, $default, $global);
}

@function global-dim($key, $tree: iro.$props-default-tree, $default: null, $global: true) {
    @return dim($key, $tree, $default, $global);
}

@function foreign-dim($foreign-key, $key, $tree: iro.$props-default-tree, $default: null, $global: true) {
    @return iro.props-get(list.join($foreign-key --dims, $key), $tree, $default, $global);
}

@function font-prop($data, $overrides, $key, $prop) {
    @if (map.has-key($overrides, $prop)) {
        @return map.get($overrides, $prop);
    } @else if (map.has-key($data, $prop)) {
        @return global-dim(--font $key $prop);
    }
    @return null;
}

@function set-font($key, $overrides: ()) {
    $font: iro.props-get-static(list.join(--dims --font, $key), $global: true);

    $map: (
        font-family:             font-prop($font, $overrides, $key, --family),
        font-size:               font-prop($font, $overrides, $key, --size),
        font-weight:             font-prop($font, $overrides, $key, --weight),
        font-style:              font-prop($font, $overrides, $key, --style),
        line-height:             font-prop($font, $overrides, $key, --line-height),
        text-transform:          font-prop($font, $overrides, $key, --transform),
        letter-spacing:          font-prop($font, $overrides, $key, --spacing),
        font-variant-alternates: font-prop($font, $overrides, $key, --variant-alternates),
        font-feature-settings:   font-prop($font, $overrides, $key, --feature-settings),
    );

    @return $map;
}

@function lum($color) {
    @return list.nth(blend-convert.lin_sRGB_to_XYZ(blend-convert.lin_sRGB(blend-convert.sassToRgb($color))), 2) + .05;
}

@function palette($base-color, $contrasts, $chroma-range: 1, $reference-color: $base-color) {
    $base-lch: iro-colors.parse-oklch($base-color);
    $ref-lch:  iro-colors.parse-oklch($reference-color);
    $ref-l:    list.nth($ref-lch, 1);
    $ref-y:    iro-colors.apca_sRGB_to_Y($reference-color);

    $cmax: math.max(map.values($contrasts)...);
    $cmax: math.max($cmax, math.abs(math.min(map.values($contrasts)...)));

    $black-y: iro-colors.apca_sRGB_to_Y(#000);
    $white-y: iro-colors.apca_sRGB_to_Y(#fff);

    $chroma-easing: meta.get-function(config.$palette-chroma-easing, $module: easing);

    $palette: ();

    @each $key, $contrast in $contrasts {
        //$i: math.div(list.length($palette), 2 * (list.length($contrasts) - 1));
        $y: iro-colors.apcaReverse($contrast, $ref-y);
        $l: list.nth($base-lch, 1);
        $c: 1;

        @if $y != false {
            $y-lch: blend-convert.Lab_to_LCH(
                iro-colors.lin_sRGB_to_Oklab(
                    blend-convert.lin_sRGB(
                        blend-convert.sassToRgb(
                            iro-colors.apca_Y_to_sRGB($y)
                        )
                    )
                )
            );
            $l: list.nth($y-lch, 1);
        } @else {
            $y: $ref-y;
        }

        @if $chroma-range != 1 {
            $c: if(
                $ref-l > .5,
                math.clamp(0, math.div($contrast, $cmax), 1),
                -1 * math.clamp(-1, math.div($contrast, $cmax), 0)
            );
            $c: meta.call($chroma-easing, $c);
            $c: $chroma-range + (1 - $chroma-range) * $c;
        }

        $color: oklch(($l * 100%) ($c * list.nth($base-lch, 2)) list.nth($base-lch, 3));
        //$color: $l, $c * list.nth($base-lch, 2), list.nth($base-lch, 3);
        //$color: blend-convert.rgbToSass(
        //    blend-convert.gam_sRGB(
        //        iro-colors.Oklab_to_lin_sRGB(
        //            blend-convert.LCH_to_Lab($color)
        //        )
        //    )
        //);

        $contrast-black: iro-colors.apcaContrast($black-y, $y);
        $contrast-white: iro-colors.apcaContrast($white-y, $y);

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

    @return $palette;
}

@function px-to-em($size, $base: iro.$vars-root-size) {
    @return math.div($size, $base) * 1em;
}