import { emojiMap } from './emoji'

export interface Match {
  type: 'link' | 'emoji' | 'text' | 'Ait'
  value: string
}

const emojiRegExp = new RegExp(
  '(' +
    Object.keys(emojiMap)
      .map((item) => {
        const left = `\\${item.slice(0, 1)}`
        const right = `\\${item.slice(-1)}`
        const mid = item.slice(1, -1)
        return `${left}${mid}${right}`
      })
      .join('|') +
    ')',
  'g'
)

/* eslint-disable vars-on-top, no-var, prefer-template */
// @ts-nocheck
var isRegExp = function (re: any) {
  return re instanceof RegExp
}
var escapeRegExp = function escapeRegExp(string: string) {
  var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
    reHasRegExpChar = RegExp(reRegExpChar.source)

  return string && reHasRegExpChar.test(string)
    ? string.replace(reRegExpChar, '\\$&')
    : string
}
var isString = function (value: string | any[]) {
  return typeof value === 'string'
}
var flatten = function (array: any[]) {
  var newArray: any[] = []

  array.forEach(function (item) {
    if (Array.isArray(item)) {
      newArray = newArray.concat(item)
    } else {
      newArray.push(item)
    }
  })

  return newArray
}

/**
 * Given a string, replace every substring that is matched by the `match` regex
 * with the result of calling `fn` on matched substring. The result will be an
 * array with all odd indexed elements containing the replacements. The primary
 * use case is similar to using String.prototype.replace except for React.
 *
 * React will happily render an array as children of a react element, which
 * makes this approach very useful for tasks like surrounding certain text
 * within a string with react elements.
 *
 * Example:
 * matchReplace(
 *   'Emphasize all phone numbers like 884-555-4443.',
 *   /([\d|-]+)/g,
 *   (number, i) => <strong key={i}>{number}</strong>
 * );
 * // => ['Emphasize all phone numbers like ', <strong>884-555-4443</strong>, '.'
 *
 * @param {string} str
 * @param {RegExp|str} match Must contain a matching group
 * @param {function} fn
 * @return {array}
 */

function replaceString(str: string | any[], match: RegExp, fn: Function) {
  var curCharStart = 0
  var curCharLen = 0

  if (str === '') {
    return str
  } else if (!str || !isString(str)) {
    throw new TypeError(
      'First argument to react-string-replace#replaceString must be a string'
    )
  }

  var re = match

  if (!isRegExp(re)) {
    // @ts-ignore
    re = new RegExp('(' + escapeRegExp(re) + ')', 'gi')
  }
  // @ts-ignore
  var result = str.split(re)

  // Apply fn to all odd elements
  for (var i = 1, length = result.length; i < length; i += 2) {
    /** @see {@link https://github.com/iansinnott/react-string-replace/issues/74} */
    if (result[i] === undefined || result[i - 1] === undefined) {
      console.warn(
        'reactStringReplace: Encountered undefined value during string replacement. Your RegExp may not be working the way you expect.'
      )
      continue
    }

    curCharLen = result[i].length
    curCharStart += result[i - 1].length
    result[i] = fn(result[i], i, curCharStart)
    curCharStart += curCharLen
  }

  return result
}

// 字符串替换
function stringReplace(source: string | any[], match: RegExp, fn: Function) {
  if (!Array.isArray(source)) source = [source]

  return flatten(
    source.map(function (x) {
      return isString(x) ? replaceString(x, match, fn) : x
    })
  )
}

export function parseText(text: string, ext?: string): Match[] {
  if (!text) return []
  const regexLink = /(https?:\/\/\S+)/gi
  const yxAitMsg = ext ? JSON.parse(ext).yxAitMsg : null
  const emojiArr = stringReplace(text, emojiRegExp, (item: any) => {
    return {
      type: 'emoji',
      value: item,
    }
  })

  const emojiAndLinkArr = stringReplace(emojiArr, regexLink, (item: any) => {
    return {
      type: 'link',
      value: item,
    }
  })

  let emojiAndLinkAndAitArr = emojiAndLinkArr
  if (yxAitMsg) {
    Object.keys(yxAitMsg)?.forEach((key) => {
      const item = yxAitMsg[key]
      emojiAndLinkAndAitArr = stringReplace(
        emojiAndLinkAndAitArr,
        item.text,
        (item: any) => {
          return {
            type: 'Ait',
            value: item,
          }
        }
      )
    })
  }

  const result = emojiAndLinkAndAitArr.map((item) => {
    if (typeof item == 'string') {
      return {
        type: 'text',
        value: item,
      }
    } else {
      return item
    }
  })
  return result
}