import { API_BASE, TOKEN_KEY, REFRESH_TOKEN_KEY, USER_INFO_KEY } from '@/config/api'

let clearingAuth = false

function createUnauthorizedError(rawUrl = '') {
  const loginApiPattern = /\/mini\/auth\/login(?:$|\?)/
  const message = loginApiPattern.test(String(rawUrl))
    ? '用户名或密码错误，请重新输入'
    : '登录状态已失效，请重新登录'
  const error = new Error(message)
  error.name = 'UnauthorizedError'
  return error
}

async function onHttpUnauthorized() {
  if (clearingAuth) return
  clearingAuth = true
  // 先同步清理本地登录态，避免 store 动态导入失败时仍被识别为已登录
  uni.removeStorageSync(TOKEN_KEY)
  uni.removeStorageSync(REFRESH_TOKEN_KEY)
  uni.removeStorageSync(USER_INFO_KEY)
  try {
    const { useUserStore } = await import('@/stores/user')
    useUserStore().clearLoginInfo()
  } catch (error) {
    // ignore
  }
  const pages = typeof getCurrentPages === 'function' ? getCurrentPages() : []
  const currentRoute = pages.length ? pages[pages.length - 1].route : ''
  if (currentRoute === 'pages/login/login') {
    clearingAuth = false
    return
  }
  uni.showToast({ title: '登录已失效，请重新登录', icon: 'none' })
  uni.reLaunch({
    url: '/pages/login/login',
    fail: () => {
      // 某些端在请求回调中 reLaunch 可能失败，使用 redirectTo 兜底
      uni.redirectTo({ url: '/pages/login/login' })
    },
    complete: () => {
      setTimeout(() => {
        clearingAuth = false
      }, 800)
    }
  })
}

function isBizUnauthorized(data) {
  if (!data || typeof data !== 'object') return false
  return data.code === 401
}

export function request(options) {
  if (clearingAuth) {
    return Promise.reject(createUnauthorizedError(options?.url))
  }
  const rawToken = uni.getStorageSync(TOKEN_KEY)
  const token = typeof rawToken === 'string' ? rawToken.trim() : ''
  const rawUrl = options.url || ''
  const url = rawUrl.startsWith('http')
    ? rawUrl
    : `${API_BASE}${rawUrl.startsWith('/') ? rawUrl : `/${rawUrl}`}`

  return new Promise((resolve, reject) => {
    uni.request({
      ...options,
      url,
      header: {
        'Content-Type': 'application/json',
        ...(token ? { Authorization: `Bearer ${token}` } : {}),
        ...(options.header || {})
      },
      success: (res) => {
        if (res.statusCode === 401 || isBizUnauthorized(res.data)) {
          onHttpUnauthorized()
          reject(createUnauthorizedError(rawUrl))
          return
        }
        resolve(res)
      },
      fail: (err) => reject(err)
    })
  })
}

export function parseResponseJson(res) {
  const d = res.data
  if (d == null) return d
  if (typeof d === 'string') {
    try {
      return JSON.parse(d)
    } catch (error) {
      return d
    }
  }
  return d
}