import md5 from './md5.js'

/** 生成 uuid */
export function guid() {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
    const r = (Math.random() * 16) | 0
    const v = c === 'x' ? r : (r & 0x3) | 0x8
    return v.toString(16)
  })
}

/**
 * 生成接口签名用的 nonce（沿用旧版约定）
 * @returns {{ timeStr: number, nonce: string }}
 */
export function getNonce() {
  const timeStr = Date.now()
  const str = md5(timeStr.toString())
  const nonce = str.substring(4, 14)
  return { timeStr, nonce }
}

/** 获取版本信息（沿用旧项目：默认 0.0.0 兜底，避免后端“version必填”报错） */
export function getVersion() {
  let version = '0.0.0'
  let version_code = 0
  // #ifdef APP-PLUS
  version = plus.runtime.version
  version_code = plus.runtime.versionCode
  // #endif
  // #ifdef MP-WEIXIN
  version = uni.getAccountInfoSync().miniProgram.version || '0.0.0'
  // #endif
  return { version, version_code }
}

/** 判断当前栈顶是否为登录页，避免重复跳转登录 */
export function isLoginTop() {
  const pages = getCurrentPages()
  if (!pages.length) return false
  const top = pages[pages.length - 1]
  return (top.route || '').includes('pages/login/login')
}

/** 获取 UserAgent（登录上报用，沿用旧项目逻辑） */
export function getUA() {
  // #ifdef APP-PLUS
  const info = uni.getSystemInfoSync()
  const ua = plus.navigator.getUserAgent()
  return `${ua} ${info.osName}/${info.osVersion} ${info.deviceBrand}/${info.deviceModel} ${info.appVersion}/${info.appVersionCode}`
  // #endif
  // #ifdef H5
  return navigator.userAgent
  // #endif
  // #ifndef APP-PLUS || H5
  const sys = uni.getSystemInfoSync()
  return `miniprogram ${sys.osName}/${sys.osVersion} ${sys.deviceBrand || ''}/${sys.deviceModel || ''}`
  // #endif
}

/** H5 是否在微信内置浏览器中 */
export function isInWechat() {
  // #ifdef H5
  return /MicroMessenger/i.test(navigator.userAgent)
  // #endif
  // eslint-disable-next-line no-unreachable
  return false
}

/** 客户端类型：1.pc 2.h5 3.ios 4.android 5.微信小程序 */
export function getClient() {
  let client = 2
  // #ifdef APP-PLUS
  client = uni.getSystemInfoSync().platform === 'ios' ? 3 : 4
  // #endif
  // #ifdef MP-WEIXIN
  client = 5
  // #endif
  return client
}