// TODO make separate npm module

// https://stackoverflow.com/a/4382138/6519037
const allColors = [
  'hsl(42, 100%, 50%)',
  'hsl(310, 34%, 37%)',
  'hsl(24, 100%, 50%)',
  'hsl(211, 38%, 74%)',
  'hsl(350, 100%, 37%)',
  'hsl(35, 52%, 59%)',
  'hsl(22, 11%, 45%)',
  'hsl(145, 100%, 24%)',
  'hsl(348, 87%, 71%)',
  'hsl(203, 100%, 27%)',
  'hsl(11, 100%, 68%)',
  'hsl(265, 37%, 34%)',
  'hsl(33, 100%, 50%)',
  'hsl(342, 63%, 42%)',
  'hsl(49, 100%, 47%)',
  'hsl(5, 81%, 27%)',
  'hsl(68, 100%, 33%)',
  'hsl(26, 61%, 21%)',
  'hsl(10, 88%, 51%)',
  'hsl(84, 33%, 12%)',
];

// https://digitalsynopsis.com/design/beautiful-color-ui-gradients-backgrounds/
const gradientColors = [
  [
    '#ff9aac',
    '#ffa875',
  ],
  [
    '#cc2b5e',
    '#753a88',
  ],
  [
    '#42275a',
    '#734b6d',
  ],
  [
    '#bdc3c7',
    '#2c3e50',
  ],
  [
    '#de6262',
    '#ffb88c',
  ],
  [
    '#eb3349',
    '#f45c43',
  ],
  [
    '#dd5e89',
    '#f7bb97',
  ],
  [
    '#56ab2f',
    '#a8e063',
  ],
  [
    '#614385',
    '#516395',
  ],
  [
    '#eecda3',
    '#ef629f',
  ],
  [
    '#eacda3',
    '#d6ae7b',
  ],
  [
    '#02aab0',
    '#00cdac',
  ],
  [
    '#d66d75',
    '#e29587',
  ],
  [
    '#000428',
    '#004e92',
  ],
  [
    '#ddd6f3',
    '#faaca8',
  ],
  [
    '#7b4397',
    '#dc2430',
  ],
  [
    '#43cea2',
    '#185a9d',
  ],
  [
    '#ba5370',
    '#f4e2d8',
  ],
  [
    '#ff512f',
    '#dd2476',
  ],
  [
    '#4568dc',
    '#b06ab3',
  ],
  [
    '#ec6f66',
    '#f3a183',
  ],
  [
    '#ffd89b',
    '#19547b',
  ],
  [
    '#3a1c71',
    '#d76d77',
  ],
  [
    '#4ca1af',
    '#c4e0e5',
  ],
  [
    '#ff5f6d',
    '#ffc371',
  ],
  [
    '#36d1dc',
    '#5b86e5',
  ],
  [
    '#c33764',
    '#1d2671',
  ],
  [
    '#141e30',
    '#243b55',
  ],
  [
    '#ff7e5f',
    '#feb47b',
  ],
  [
    '#ed4264',
    '#ffedbc',
  ],
  [
    '#2b5876',
    '#4e4376',
  ],
  [
    '#ff9966',
    '#ff5e62',
  ],
  [
    '#aa076b',
    '#61045f',
  ],
];

/* const lightGradients = [
  [
    '#ee9ca7',
    '#ffdde1',
  ],
  [
    '#2193b0',
    '#6dd5ed',
  ],
]; */

function getRandomColor(colors = allColors) {
  const index = Math.floor(Math.random() * colors.length);
  const remainingColors = [...colors];
  remainingColors.splice(index, 1);
  return { remainingColors, color: colors[index] || allColors[0] };
}

function getRandomColors(num) {
  let colors = allColors;
  const out = [];
  for (let i = 0; i < Math.min(num, allColors.length); i += 1) {
    const { remainingColors, color } = getRandomColor(colors);
    out.push(color);
    colors = remainingColors;
  }
  return out;
}

function getRandomGradient() {
  return gradientColors[Math.floor(Math.random() * gradientColors.length)];
}

module.exports = {
  getRandomColors,
  getRandomGradient,
};