export function md5(string) {
  function RotateLeft(lValue, iShiftBits) {
    return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits))
  }

  function AddUnsigned(lX, lY) {
    let lX4, lY4, lX8, lY8, lResult
    lX8 = lX & 0x80000000
    lY8 = lY & 0x80000000
    lX4 = lX & 0x40000000
    lY4 = lY & 0x40000000
    lResult = (lX & 0x3fffffff) + (lY & 0x3fffffff)
    if (lX4 & lY4) {
      return lResult ^ 0x80000000 ^ lX8 ^ lY8
    }
    if (lX4 | lY4) {
      if (lResult & 0x40000000) {
        return lResult ^ 0xc0000000 ^ lX8 ^ lY8
      } else {
        return lResult ^ 0x40000000 ^ lX8 ^ lY8
      }
    } else {
      return lResult ^ lX8 ^ lY8
    }
  }

  function F(x, y, z) {
    return (x & y) | (~x & z)
  }
  function G(x, y, z) {
    return (x & z) | (y & ~z)
  }
  function H(x, y, z) {
    return x ^ y ^ z
  }
  function I(x, y, z) {
    return y ^ (x | ~z)
  }

  function FF(a, b, c, d, x, s, ac) {
    a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac))
    return AddUnsigned(RotateLeft(a, s), b)
  }

  function GG(a, b, c, d, x, s, ac) {
    a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac))
    return AddUnsigned(RotateLeft(a, s), b)
  }

  function HH(a, b, c, d, x, s, ac) {
    a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac))
    return AddUnsigned(RotateLeft(a, s), b)
  }

  function II(a, b, c, d, x, s, ac) {
    a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac))
    return AddUnsigned(RotateLeft(a, s), b)
  }

  function ConvertToWordArray(string) {
    let lWordCount
    let lMessageLength = string.length
    let lNumberOfWords_temp1 = lMessageLength + 8
    let lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64
    let lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16
    let lWordArray = Array(lNumberOfWords - 1)
    let lBytePosition = 0
    let lByteCount = 0
    while (lByteCount < lMessageLength) {
      lWordCount = (lByteCount - (lByteCount % 4)) / 4
      lBytePosition = (lByteCount % 4) * 8
      lWordArray[lWordCount] = lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition)
      lByteCount++
    }
    lWordCount = (lByteCount - (lByteCount % 4)) / 4
    lBytePosition = (lByteCount % 4) * 8
    lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition)
    lWordArray[lNumberOfWords - 2] = lMessageLength << 3
    lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29
    return lWordArray
  }

  function WordToHex(lValue) {
    let WordToHexValue = '',
      WordToHexValue_temp = '',
      lByte,
      lCount
    for (lCount = 0; lCount <= 3; lCount++) {
      lByte = (lValue >>> (lCount * 8)) & 255
      WordToHexValue_temp = '0' + lByte.toString(16)
      WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length - 2, 2)
    }
    return WordToHexValue
  }

  function Utf8Encode(string) {
    string = string.replace(/\r\n/g, '\n')
    let utftext = ''

    for (let n = 0; n < string.length; n++) {
      let c = string.charCodeAt(n)

      if (c < 128) {
        utftext += String.fromCharCode(c)
      } else if (c > 127 && c < 2048) {
        utftext += String.fromCharCode((c >> 6) | 192)
        utftext += String.fromCharCode((c & 63) | 128)
      } else {
        utftext += String.fromCharCode((c >> 12) | 224)
        utftext += String.fromCharCode(((c >> 6) & 63) | 128)
        utftext += String.fromCharCode((c & 63) | 128)
      }
    }

    return utftext
  }

  let k, AA, BB, CC, DD, a, b, c, d
  let S11 = 7,
    S12 = 12,
    S13 = 17,
    S14 = 22
  let S21 = 5,
    S22 = 9,
    S23 = 14,
    S24 = 20
  let S31 = 4,
    S32 = 11,
    S33 = 16,
    S34 = 23
  let S41 = 6,
    S42 = 10,
    S43 = 15,
    S44 = 21

  string = Utf8Encode(string)

  let x = ConvertToWordArray(string)

  a = 0x67452301
  b = 0xefcdab89
  c = 0x98badcfe
  d = 0x10325476

  for (k = 0; k < x.length; k += 16) {
    AA = a
    BB = b
    CC = c
    DD = d
    a = FF(a, b, c, d, x[k + 0], S11, 0xd76aa478)
    d = FF(d, a, b, c, x[k + 1], S12, 0xe8c7b756)
    c = FF(c, d, a, b, x[k + 2], S13, 0x242070db)
    b = FF(b, c, d, a, x[k + 3], S14, 0xc1bdceee)
    a = FF(a, b, c, d, x[k + 4], S11, 0xf57c0faf)
    d = FF(d, a, b, c, x[k + 5], S12, 0x4787c62a)
    c = FF(c, d, a, b, x[k + 6], S13, 0xa8304613)
    b = FF(b, c, d, a, x[k + 7], S14, 0xfd469501)
    a = FF(a, b, c, d, x[k + 8], S11, 0x698098d8)
    d = FF(d, a, b, c, x[k + 9], S12, 0x8b44f7af)
    c = FF(c, d, a, b, x[k + 10], S13, 0xffff5bb1)
    b = FF(b, c, d, a, x[k + 11], S14, 0x895cd7be)
    a = FF(a, b, c, d, x[k + 12], S11, 0x6b901122)
    d = FF(d, a, b, c, x[k + 13], S12, 0xfd987193)
    c = FF(c, d, a, b, x[k + 14], S13, 0xa679438e)
    b = FF(b, c, d, a, x[k + 15], S14, 0x49b40821)
    a = GG(a, b, c, d, x[k + 1], S21, 0xf61e2562)
    d = GG(d, a, b, c, x[k + 6], S22, 0xc040b340)
    c = GG(c, d, a, b, x[k + 11], S23, 0x265e5a51)
    b = GG(b, c, d, a, x[k + 0], S24, 0xe9b6c7aa)
    a = GG(a, b, c, d, x[k + 5], S21, 0xd62f105d)
    d = GG(d, a, b, c, x[k + 10], S22, 0x2441453)
    c = GG(c, d, a, b, x[k + 15], S23, 0xd8a1e681)
    b = GG(b, c, d, a, x[k + 4], S24, 0xe7d3fbc8)
    a = GG(a, b, c, d, x[k + 9], S21, 0x21e1cde6)
    d = GG(d, a, b, c, x[k + 14], S22, 0xc33707d6)
    c = GG(c, d, a, b, x[k + 3], S23, 0xf4d50d87)
    b = GG(b, c, d, a, x[k + 8], S24, 0x455a14ed)
    a = GG(a, b, c, d, x[k + 13], S21, 0xa9e3e905)
    d = GG(d, a, b, c, x[k + 2], S22, 0xfcefa3f8)
    c = GG(c, d, a, b, x[k + 7], S23, 0x676f02d9)
    b = GG(b, c, d, a, x[k + 12], S24, 0x8d2a4c8a)
    a = HH(a, b, c, d, x[k + 5], S31, 0xfffa3942)
    d = HH(d, a, b, c, x[k + 8], S32, 0x8771f681)
    c = HH(c, d, a, b, x[k + 11], S33, 0x6d9d6122)
    b = HH(b, c, d, a, x[k + 14], S34, 0xfde5380c)
    a = HH(a, b, c, d, x[k + 1], S31, 0xa4beea44)
    d = HH(d, a, b, c, x[k + 4], S32, 0x4bdecfa9)
    c = HH(c, d, a, b, x[k + 7], S33, 0xf6bb4b60)
    b = HH(b, c, d, a, x[k + 10], S34, 0xbebfbc70)
    a = HH(a, b, c, d, x[k + 13], S31, 0x289b7ec6)
    d = HH(d, a, b, c, x[k + 0], S32, 0xeaa127fa)
    c = HH(c, d, a, b, x[k + 3], S33, 0xd4ef3085)
    b = HH(b, c, d, a, x[k + 6], S34, 0x4881d05)
    a = HH(a, b, c, d, x[k + 9], S31, 0xd9d4d039)
    d = HH(d, a, b, c, x[k + 12], S32, 0xe6db99e5)
    c = HH(c, d, a, b, x[k + 15], S33, 0x1fa27cf8)
    b = HH(b, c, d, a, x[k + 2], S34, 0xc4ac5665)
    a = II(a, b, c, d, x[k + 0], S41, 0xf4292244)
    d = II(d, a, b, c, x[k + 7], S42, 0x432aff97)
    c = II(c, d, a, b, x[k + 14], S43, 0xab9423a7)
    b = II(b, c, d, a, x[k + 5], S44, 0xfc93a039)
    a = II(a, b, c, d, x[k + 12], S41, 0x655b59c3)
    d = II(d, a, b, c, x[k + 3], S42, 0x8f0ccc92)
    c = II(c, d, a, b, x[k + 10], S43, 0xffeff47d)
    b = II(b, c, d, a, x[k + 1], S44, 0x85845dd1)
    a = II(a, b, c, d, x[k + 8], S41, 0x6fa87e4f)
    d = II(d, a, b, c, x[k + 15], S42, 0xfe2ce6e0)
    c = II(c, d, a, b, x[k + 6], S43, 0xa3014314)
    b = II(b, c, d, a, x[k + 13], S44, 0x4e0811a1)
    a = II(a, b, c, d, x[k + 4], S41, 0xf7537e82)
    d = II(d, a, b, c, x[k + 11], S42, 0xbd3af235)
    c = II(c, d, a, b, x[k + 2], S43, 0x2ad7d2bb)
    b = II(b, c, d, a, x[k + 9], S44, 0xeb86d391)
    a = AddUnsigned(a, AA)
    b = AddUnsigned(b, BB)
    c = AddUnsigned(c, CC)
    d = AddUnsigned(d, DD)
  }

  let temp = WordToHex(a) + WordToHex(b) + WordToHex(c) + WordToHex(d)

  return temp.toLowerCase()
}