// port from https://changaco.oy.lc/unicode-progress-bars/

const bar_styles = [
  '▁▂▃▄▅▆▇█',
  '⣀⣄⣤⣦⣶⣷⣿',
  '⣀⣄⣆⣇⣧⣷⣿',
  '○◔◐◕⬤',
  '□◱◧▣■',
  '□◱▨▩■',
  '□◱▥▦■',
  '░▒▓█',
  '░█',
  '⬜⬛',
  '⬛⬜',
  '▱▰',
  '▭◼',
  '▯▮',
  '◯⬤',
  '⚪⚫',
]

export function unicodeProgressBar(p: number, style = 7, min_size = 8, max_size = 8) {
  let d; let full; let m; let middle; let r; let rest; let x
  let min_delta = Number.POSITIVE_INFINITY
  const bar_style = bar_styles[style]
  const full_symbol = bar_style[bar_style.length - 1]
  const n = bar_style.length - 1
  if (p === 100)
    return full_symbol.repeat(max_size)

  p = p / 100
  for (let i = max_size; i >= min_size; i--) {
    x = p * i
    full = Math.floor(x)
    rest = x - full
    middle = Math.floor(rest * n)
    if (p !== 0 && full === 0 && middle === 0) middle = 1
    d = Math.abs(p - (full + middle / n) / i) * 100
    if (d < min_delta) {
      min_delta = d
      m = bar_style[middle]
      if (full === i) m = ''
      r = full_symbol.repeat(full) + m + bar_style[0].repeat(i - full - 1)
    }
  }
  return r
}