import { toFullUuid } from '../utils/uuid'

// ED713 / ED719 当前协议共用的服务与特征 UUID。
const COMMON_UUIDS = Object.freeze({
  SERVICE: '00F4',
  WIFI: 'F401',
  KEY: 'F402',
  CMD: 'F403',
  MSG: 'F501',
  STATE: 'F301',
  RADAR: 'F302'
})

// UUID_STATE 常用状态码语义映射。
const COMMON_STATE_MAP = Object.freeze({
  1: 'WIFI_PARAM_INVALID',
  2: 'WIFI_CONNECT_FAILED',
  3: 'WIFI_CONNECT_SUCCESS',
  4: 'WIFI_CONNECTING',
  5: 'BIND_SUCCESS',
  6: 'BIND_FAILED',
  7: 'KEY_MATCH_SUCCESS',
  8: 'KEY_MATCH_FAILED'
})

export const DEVICE_PROFILE = Object.freeze({
  UNKNOWN: 'UNKNOWN',
  ED713: 'ED713',
  ED719: 'ED719'
})

/**
 * 生成设备 profile 模板：
 * 包含 UUID、分包规则、鉴权策略、WiFi 校验、雷达命令能力。
 */
function buildCommonProfile(id) {
  return {
    id,
    uuids: {
      service: toFullUuid(COMMON_UUIDS.SERVICE),
      wifi: toFullUuid(COMMON_UUIDS.WIFI),
      key: toFullUuid(COMMON_UUIDS.KEY),
      cmd: toFullUuid(COMMON_UUIDS.CMD),
      msg: toFullUuid(COMMON_UUIDS.MSG),
      state: toFullUuid(COMMON_UUIDS.STATE),
      radar: toFullUuid(COMMON_UUIDS.RADAR)
    },
    stateMap: { ...COMMON_STATE_MAP },
    packet: {
      head: 0xA7,
      chunkSize: 18,
      maxChunk: 15
    },
    auth: {
      keyLength: 16,
      supportsUnboundState: false,
      unboundStateCode: null
    },
    wifi: {
      maxSsidLength: 32,
      minPasswordLength: 8,
      maxPasswordLength: 63,
      invalidChars: ['+', '#', '&', '=', '|', '<', '>', '^', '"', '\\']
    },
    radar: {
      notifySignature: null,
      startCommand: 0xA1,
      stopCommand: 0xA2,
      parseMode: 'GENERIC'
    },
    cmd: {
      supportsNarrowMode: false,
      supportsFallParam67: false
    }
  }
}

const unknownProfile = buildCommonProfile(DEVICE_PROFILE.UNKNOWN)

const ed713Profile = {
  ...buildCommonProfile(DEVICE_PROFILE.ED713),
  auth: {
    keyLength: 16,
    supportsUnboundState: true,
    unboundStateCode: -1
  },
  radar: {
    notifySignature: 0x7C,
    startCommand: 0xA1,
    stopCommand: 0xA2,
    parseMode: 'ED713'
  },
  cmd: {
    supportsNarrowMode: true,
    supportsFallParam67: false
  }
}

const ed719Profile = {
  ...buildCommonProfile(DEVICE_PROFILE.ED719),
  radar: {
    notifySignature: 0x67,
    startCommand: 0xA1,
    stopCommand: 0xA2,
    parseMode: 'ED719'
  },
  cmd: {
    supportsNarrowMode: false,
    supportsFallParam67: true
  }
}

export const BLE_PROFILE_MAP = Object.freeze({
  [DEVICE_PROFILE.UNKNOWN]: unknownProfile,
  [DEVICE_PROFILE.ED713]: ed713Profile,
  [DEVICE_PROFILE.ED719]: ed719Profile
})

export function getBleProfile(profileId = DEVICE_PROFILE.UNKNOWN) {
  return BLE_PROFILE_MAP[profileId] || BLE_PROFILE_MAP[DEVICE_PROFILE.UNKNOWN]
}

/**
 * 根据雷达帧签名字节粗略推断设备类型。
 */
export function guessProfileByRadarFrame(frame = new Uint8Array()) {
  const signature = frame[3]

  if (signature === 0x7C) {
    return DEVICE_PROFILE.ED713
  }

  if (signature === 0x67) {
    return DEVICE_PROFILE.ED719
  }

  return DEVICE_PROFILE.UNKNOWN
}