let bleName: string | null = null
let bleMac: string | null = null

// 读取本地存储字符串；vue3 的 getStorageSync 无 key 时返回 ""，统一转成 null
function getStorageStr(key: string): string | null {
  const t = uni.getStorageSync(key) as string
  return (t != null && t.length > 0) ? t : null
}

// 保存蓝牙名字
export function setName(name: string) {
  bleName = name
  uni.setStorageSync('bleName', name)
}

// 读取蓝牙名字
export function getName(): string | null {
  if (bleName != null) {
    return bleName
  }
  bleName = getStorageStr('bleName')
  return bleName
}

// 保存蓝牙mac
export function setMac(mac: string) {
  bleMac = mac
  uni.setStorageSync('bleMac', mac)
}

// 读取蓝牙mac
export function getMac(): string | null {
  if (bleMac != null) {
    return bleMac
  }
  bleMac = getStorageStr('bleMac')
  return bleMac
}

export function clearAllData() {
  bleName = null
  bleMac = null
  uni.removeStorageSync('bleName')
  uni.removeStorageSync('bleMac')
}