const KEY_TOKEN = 'COMPREHENSIVE_VENUE_TOKEN'

const API_BASE_URL = import.meta.env.VITE_COMPREHENSIVE_API_BASE_URL || 'http://127.0.0.1:8001'

let pendingToken = null

const normalizeError = (res, fallbackMessage = '请求服务失败') => {
  const body = res?.data || res || {}
  return {
    code: body.code || res?.statusCode || 50000,
    message: body.message || fallbackMessage,
    errors: body.errors || null,
    statusCode: res?.statusCode
  }
}

export const authStorage = {
  setToken(token) {
    uni.setStorageSync(KEY_TOKEN, token)
  },
  getToken() {
    return uni.getStorageSync(KEY_TOKEN)
  },
  setPendingToken(token) {
    pendingToken = token
  },
  getPendingToken() {
    return pendingToken
  },
  clearPendingToken() {
    pendingToken = null
  },
  clear() {
    uni.removeStorageSync(KEY_TOKEN)
    pendingToken = null
  },
  isLoggedIn() {
    return !!uni.getStorageSync(KEY_TOKEN)
  }
}

let isRedirecting = false

function redirectToLogin() {
  if (isRedirecting) return
  const pages = getCurrentPages()
  const current = pages[pages.length - 1]
  const currentRoute = current?.route || ''
  if (currentRoute === 'pages/comprehensive/profile/login' || currentRoute === 'pages/comprehensive/profile/setup') {
    return
  }
  isRedirecting = true
  authStorage.clear()
  uni.reLaunch({ url: '/pages/comprehensive/profile/login', complete: () => { isRedirecting = false } })
}

export function request(options = {}) {
  const token = authStorage.getToken() || authStorage.getPendingToken()
  const header = {
    'Content-Type': 'application/json',
    ...(options.header || {})
  }

  if (token) {
    header.Authorization = `Bearer ${token}`
  }

  return new Promise((resolve, reject) => {
    uni.request({
      url: options.url.startsWith('http') ? options.url : `${API_BASE_URL}${options.url}`,
      method: options.method || 'GET',
      data: options.data,
      header,
      success: (res) => {
        const body = res.data

        if (res.statusCode === 401 || body?.code === 40001) {
          redirectToLogin()
          reject(normalizeError(res, ''))
          return
        }

        if (res.statusCode >= 200 && res.statusCode < 300 && body?.code === 0) {
          resolve(body.data)
          return
        }

        const error = normalizeError(res, `请求错误 ${res.statusCode}`)
        uni.showToast({
          title: error.message,
          icon: 'none'
        })
        reject(error)
      },
      fail: (err) => {
        const error = normalizeError(err, '网络连接失败，请检查服务')
        uni.showToast({
          title: error.message,
          icon: 'none'
        })
        reject(error)
      }
    })
  })
}

export function uploadFile(options = {}) {
  const token = authStorage.getToken() || authStorage.getPendingToken()
  const header = {
    ...(options.header || {})
  }

  if (token) {
    header.Authorization = `Bearer ${token}`
  }

  return new Promise((resolve, reject) => {
    uni.uploadFile({
      url: options.url.startsWith('http') ? options.url : `${API_BASE_URL}${options.url}`,
      filePath: options.filePath,
      name: options.name || 'file',
      formData: options.formData || {},
      header,
      success: (res) => {
        let body = {}
        try {
          body = JSON.parse(res.data || '{}')
        } catch (error) {
          body = {}
        }

        if (res.statusCode === 401 || body?.code === 40001) {
          redirectToLogin()
          reject(normalizeError({ ...res, data: body }, ''))
          return
        }

        if (res.statusCode >= 200 && res.statusCode < 300 && body?.code === 0) {
          resolve(body.data)
          return
        }

        const uploadError = normalizeError({ ...res, data: body }, `上传错误 ${res.statusCode}`)
        uni.showToast({
          title: uploadError.message,
          icon: 'none'
        })
        reject(uploadError)
      },
      fail: (err) => {
        const uploadError = normalizeError(err, '文件上传失败，请检查服务')
        uni.showToast({
          title: uploadError.message,
          icon: 'none'
        })
        reject(uploadError)
      }
    })
  })
}