'use strict';

function parseColor(color = "") {
  if (typeof color !== "string") {
    throw new TypeError("Color should be string!");
  }
  const hexMatch = /^#?([\da-f]{2})([\da-f]{2})([\da-f]{2})$/i.exec(color);
  if (hexMatch) {
    return hexMatch.splice(1).map((c) => Number.parseInt(c, 16));
  }
  const hexMatchShort = /^#?([\da-f])([\da-f])([\da-f])$/i.exec(color);
  if (hexMatchShort) {
    return hexMatchShort.splice(1).map((c) => Number.parseInt(c + c, 16));
  }
  if (color.includes(",")) {
    return color.split(",").map((p) => Number.parseInt(p));
  }
  throw new Error("Invalid color format! Use #ABC or #AABBCC or r,g,b");
}
function hexValue(components) {
  return "#" + components.map((c) => `0${c.toString(16).toUpperCase()}`.slice(-2)).join("");
}
function tint(components, intensity) {
  return components.map((c) => Math.round(c + (255 - c) * intensity));
}
function shade(components, intensity) {
  return components.map((c) => Math.round(c * intensity));
}
const withTint = (intensity) => (hex) => tint(hex, intensity);
const withShade = (intensity) => (hex) => shade(hex, intensity);

const _variants = {
  50: withTint(0.95),
  100: withTint(0.9),
  200: withTint(0.75),
  300: withTint(0.6),
  400: withTint(0.3),
  500: (c) => c,
  600: withShade(0.9),
  700: withShade(0.6),
  800: withShade(0.45),
  900: withShade(0.3),
  950: withShade(0.2)
};
function getColors(color, variants = _variants) {
  const colors = {};
  const components = parseColor(color);
  for (const [name, fn] of Object.entries(variants)) {
    colors[name] = hexValue(fn(components));
  }
  return colors;
}

exports._variants = _variants;
exports.getColors = getColors;