class Bytearray extends Array {
  constructor () {
    super()
    this.offset = 0
    this.INSPECT_MAX_BYTES = 8
  }

  writeUIntLE (value, byteLength) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0
    byteLength = byteLength >>> 0

    var mul = 1
    var i = 0
    this[offset] = value
    while (++i < byteLength && (mul *= 0x100)) { this[offset + i] = (value / mul) >>> 0 }
    return this.offset += byteLength
  }

  writeUIntBE (value, byteLength) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0
    byteLength = byteLength >>> 0

    var i = byteLength - 1
    var mul = 1
    this[offset + i] = value
    while (--i >= 0 && (mul *= 0x100)) { this[offset + i] = (value / mul) >>> 0 }

    return this.offset += byteLength
  }

  writeUInt8 (value) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0
    this[offset] = value
    return this.offset += 1
  }

  writeUInt16LE (value) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0

    this[offset] = value
    this[offset + 1] = (value >>> 8)
    return this.offset += 2
  }

  writeUInt16BE (value) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0

    this[offset] = (value >>> 8)
    this[offset + 1] = value
    return this.offset += 2
  }

  writeUInt32LE (value) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0

    this[offset + 3] = (value >>> 24)
    this[offset + 2] = (value >>> 16)
    this[offset + 1] = (value >>> 8)
    this[offset] = value
    return this.offset += 4
  }

  writeUInt32BE (value) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0
    this[offset] = (value >>> 24)
    this[offset + 1] = (value >>> 16)
    this[offset + 2] = (value >>> 8)
    this[offset + 3] = value
    return this.offset += 4
  }

  writeIntLE (value, byteLength) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0

    var i = 0
    var mul = 1
    var sub = 0
    this[offset] = value
    while (++i < byteLength && (mul *= 0x100)) {
      if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) { sub = 1 }
      this[offset + i] = ((value / mul) >> 0) - sub
    }

    return this.offset += byteLength
  }

  writeIntBE (value, byteLength) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0

    var i = byteLength - 1
    var mul = 1
    var sub = 0
    this[offset + i] = value
    while (--i >= 0 && (mul *= 0x100)) {
      if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) { sub = 1 }
      this[offset + i] = ((value / mul) >> 0) - sub
    }

    return this.offset += byteLength
  }

  writeInt8 (value) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0

    this[offset] = value
    return this.offset += 1
  }

  writeInt16LE (value) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0

    this[offset] = value
    this[offset + 1] = (value >>> 8)
    return this.offset += 2
  }

  writeInt16BE (value) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0

    this[offset] = (value >>> 8)
    this[offset + 1] = value
    return this.offset += 2
  }

  writeInt32LE (value) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0
    this[offset] = value
    this[offset + 1] = (value >>> 8)
    this[offset + 2] = (value >>> 16)
    this[offset + 3] = (value >>> 24)
    return this.offset += 4
  }

  writeInt32BE (value, noAssert) {
    value = +value
    let offset = this.offset
    offset = offset >>> 0
    this[offset] = (value >>> 24)
    this[offset + 1] = (value >>> 16)
    this[offset + 2] = (value >>> 8)
    this[offset + 3] = value
    return this.offset += 4
  }

  append (Buf) {
    for (let i of Buf) {
      this.push(i)
      this.offset++
    }
    return this.offset
  }

  write (...args) {
    // cheating again xd
    let encoded = Buffer.alloc(args[0].length)
    encoded.write.apply(encoded, args)
    this.append(encoded)
  }

  toString (...args) {
    // cheating a bit xd
    return Buffer.prototype.toString.apply(Buffer.from(this), args)
  }

  inspect () {
    var str = ''
    var max = this.INSPECT_MAX_BYTES
    str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
    if (this.length > max) { str += ' ... ' }
    return `<${this.constructor.name} ${str}>`
  }
}

module.exports = Bytearray