// Copyright 2018 the Deno authors. All rights reserved. MIT license.
const matchOperatorsRe = /[|\\{}()[\]^$+*?.]/g;
function escapeStringRegexp(str: string): string {
  return str.replace(matchOperatorsRe, "\\$&");
}

const codes = {
  reset: [0, 0],
  bold: [1, 22],
  dim: [2, 22],
  italic: [3, 23],
  underline: [4, 24],
  inverse: [7, 27],
  hidden: [8, 28],
  strikethrough: [9, 29],

  black: [30, 39],
  red: [31, 39],
  green: [32, 39],
  yellow: [33, 39],
  blue: [34, 39],
  magenta: [35, 39],
  cyan: [36, 39],
  white: [37, 39],

  blackBright: [90, 39],
  redBright: [91, 39],
  greenBright: [92, 39],
  yellowBright: [93, 39],
  blueBright: [94, 39],
  magentaBright: [95, 39],
  cyanBright: [96, 39],
  whiteBright: [97, 39],

  bgBlack: [40, 49],
  bgRed: [41, 49],
  bgGreen: [42, 49],
  bgYellow: [43, 49],
  bgBlue: [44, 49],
  bgMagenta: [45, 49],
  bgCyan: [46, 49],
  bgWhite: [47, 49],

  bgBlackBright: [100, 49],
  bgRedBright: [101, 49],
  bgGreenBright: [102, 49],
  bgYellowBright: [103, 49],
  bgBlueBright: [104, 49],
  bgMagentaBright: [105, 49],
  bgCyanBright: [106, 49],
  bgWhiteBright: [107, 49]
};

type Styles<T> = {
  [S in keyof T]: { open: string; close: string; closeRe: RegExp }
};

export const styles: Styles<typeof codes> = {} as any;

for (const [style, [open, close]] of Object.entries(codes)) {
  styles[style] = {
    open: `\u001b[${open}m`,
    close: `\u001b[${close}m`,
    closeRe: new RegExp(escapeStringRegexp(`\u001b[${close}m`), "g")
  };
}