const PersistentData = require('./persistent_data')
const nbt = require('prismarine-nbt')

class PlayerData extends PersistentData {
  _bots = new Set()

  parse (data) {
    const parsed = {}
    data = data.value // * Convenient since I don't need to write data.value a bunch of times

    if (data.username) parsed.username = data.username?.value

    if (data.seen?.value) {
      parsed.seen = {}
      if (data.seen.value.first?.value) parsed.seen.first = new Date(Number(data.seen.value.first?.value))
      if (data.seen.value.last?.value) parsed.seen.last = new Date(Number(data.seen.value.last?.value))
    }

    if (data.mail?.value?.value && Array.isArray(data.mail.value.value)) {
      parsed.mail = data.mail.value.value.map(this.#parseMail)
    }

    return parsed
  }

  #parseMail (mail) {
    const signedPort = Number(mail?.port?.value ?? 25565)
    const uint16Array = new Uint16Array(1)
    uint16Array[0] = signedPort
    const unsignedPort = uint16Array[0]

    return {
      sender: String(mail?.sender?.value),
      message: String(mail?.message?.value),
      host: String(mail?.host?.value),
      port: unsignedPort
    }
  }

  unparse (parsed) {
    const data = {}

    if (parsed.username) data.username = nbt.string(parsed.username)

    if (parsed.seen) {
      data.seen = nbt.comp({ first: nbt.long(BigInt(parsed.seen.first.getTime())), last: nbt.long(BigInt(parsed.seen.last.getTime())) })
    }

    if (parsed.mail) {
      data.mail = nbt.list(nbt.comp(parsed.mail.map(this.#unparseMail)))
    }

    return nbt.comp(data)
  }

  #unparseMail (mail) {
    const unsignedPort = mail.port ?? 25565
    const int16Array = new Int16Array(1)
    int16Array[0] = unsignedPort
    const signedPort = int16Array[0]

    const result = {
      sender: nbt.string(mail.sender),
      message: nbt.string(mail.message),
      host: nbt.string(mail.host)
    }
    if (unsignedPort !== 25565) result.port = nbt.short(signedPort)
    return result
  }
}

module.exports = PlayerData