@use "sass:math";
@use "sass:list";
@use "sass:map";
@use "sass:color";
@use "sass:string";
@use "helper";

// define color and hues
// see http://www.workwithcolor.com/
//
// name from to dark light
$-color-maps: (
    red 355deg 360deg 0deg 355deg,
    red 0deg 11deg 0deg 11deg,
    red_orange 11deg 21deg 10deg 21deg,
    orange 21deg 40deg 20deg 41deg,
    orange_yellow 41deg 51deg 35deg 51deg,
    yellow 51deg 61deg 40deg 61deg,
    yellow_green 61deg 81deg 55deg 81deg,
    green 81deg 121deg 121deg 80deg,
    green 121deg 141deg 120deg 141deg,
    green_cyan 141deg 170deg 141deg 170deg,
    cyan 170deg 201deg 201deg 170deg,
    cyan_blue 201deg 221deg 221deg 201deg,
    blue 221deg 241deg 241deg 221deg,
    blue_magenta 241deg 281deg 250deg 281deg,
    magenta 281deg 321deg 280deg 321deg,
    magenta_pink 321deg 331deg 315deg 331deg,
    pink 331deg 342deg 328deg 342deg,
    pink_red 342deg 355deg 359deg 342deg
);

$-mix: (
    "50": 95% brightest,
    "100": 85% brightest,
    "200": 60% brightest,
    "300": 35% brightest,
    "400": 20% brightest,
    "600": 20% darkest,
    "700": 40% darkest,
    "800": 75% darkest,
    "900": 90% darkest,
);

@function -between($v, $min, $max) {
    @return $v >= $min and $v <= $max;
}

@function -find($color) {
    $hue: color.hue($color);
    @each $col-map in $-color-maps {
        $from: list.nth($col-map, 2);
        $to: list.nth($col-map, 3);
        @if -between($hue, $from, $to) {
            @return $col-map;
        }
    }
    @return null;
}

@function -darkest($color) {
    $record: -find($color);
    $hue: list.nth($record, 4);
    // get with full color version
    $sat: if(color.saturation($color) > 40%, 100%, 50%);
    $sat: if(color.saturation($color) == 0%, 0%, $sat);
    // get darkest version of color
    $lgh: if(color.lightness($color) >= 50%, 40%, 17%);
    @return hsl($hue, $sat, $lgh);
}

@function -brightest($color) {
    $record: -find($color);
    $hue: list.nth($record, 5);
    @return hsl($hue, color.saturation($color), 95%);
}

@function -validate($var) {
    $valids: "50" "100" "200" "300" "400" "500" "600" "700" "800" "900";
    $var: helper.string-of($var, "palette", "variant");
    @if list.index($valids, $var) == null {
        @error helper.throw($var, "palette", "variant", "variant");
    }
    @return $var;
}

@function palette($color, $variant) {
    $color: helper.color-of($color, "palette", "color");
    $variant: -validate($variant);
    $data: map.get($-mix, $variant);
    @if $data != null {
        $amount: list.nth($data, 1);
        $base: if(list.nth($data, 2) == brightest, -brightest($color), -darkest($color));
        @return color.mix($base, $color, $amount);
    }
    @return $color;
}