import axios from 'axios'

/** 与后台管理分开存储，专用于移动端核销页 */
export const H5_TOKEN_KEY = 'szkp_h5_verify_token'

/** 短入口码（URL 参数 v=） */
export const VERIFY_PORTAL_CODE_KEY = 'szkp_verify_portal_code'

/** 旧版长 UUID（URL 参数 portal=），仅兼容历史链接 */
export const VERIFY_PORTAL_LEGACY_TOKEN_KEY = 'szkp_verify_portal_legacy_token'

/** admin：后台超级管理员核销；portal：活动专用账号 */
export const VERIFY_AUTH_MODE_KEY = 'szkp_verify_auth_mode'

const baseURL = (import.meta.env.VITE_API_BASE_URL as string | undefined) ?? 'http://127.0.0.1:8000/api'

/** 生产环境后台 SPA 挂在 /admin/，须带 BASE_URL，否则会跳到 /h5/ 的 uni-app 与核销页冲突 */
export function verifyLoginAbsoluteUrl(): string {
  return buildUnifiedActivityVerifyLoginUrl()
}

/** 活动核销：全平台统一入口链接（不在 URL 上区分活动），活动由 6 位数字口令区分 */
export function buildUnifiedActivityVerifyLoginUrl(): string {
  const pathname = window.location.pathname || ''
  const subPath = pathname.includes('/m/verify') ? 'm/verify/login' : 'h5/verify/login'
  const base = import.meta.env.BASE_URL || '/'
  const normalized = base.endsWith('/') ? base : `${base}/`
  return `${window.location.origin}${normalized}${subPath}`
}
export function buildVerifyLoginUrlWithPortal(): string {
  const code = localStorage.getItem(VERIFY_PORTAL_CODE_KEY)
  const legacy = localStorage.getItem(VERIFY_PORTAL_LEGACY_TOKEN_KEY)
  const pathname = window.location.pathname || ''
  const subPath = pathname.includes('/m/verify') ? 'm/verify/login' : 'h5/verify/login'
  const base = import.meta.env.BASE_URL || '/'
  const normalized = base.endsWith('/') ? base : `${base}/`
  const u = new URL(`${window.location.origin}${normalized}${subPath}`)
  if (code) {
    u.searchParams.set('v', code)
  } else if (legacy) {
    u.searchParams.set('portal', legacy)
  }
  return u.toString()
}

/** 管理端展示的独立核销链接（短码 v=） */
export function buildVerifyPortalPublicUrl(portalCode: string): string {
  const base = import.meta.env.BASE_URL || '/'
  const normalized = base.endsWith('/') ? base : `${base}/`
  const u = new URL(`${window.location.origin}${normalized}h5/verify/login`)
  u.searchParams.set('v', String(portalCode).toLowerCase().trim())
  return u.toString()
}

export const h5Http = axios.create({
  baseURL,
  timeout: 20000,
})

h5Http.interceptors.request.use((config) => {
  const token = localStorage.getItem(H5_TOKEN_KEY)
  if (token) {
    config.headers.Authorization = `Bearer ${token}`
  }
  return config
})

h5Http.interceptors.response.use(
  (res) => res,
  (error) => {
    const status = error?.response?.status
    if (status === 401 || status === 403) {
      localStorage.removeItem(H5_TOKEN_KEY)
      const path = window.location.pathname || ''
      if (path.includes('/h5/verify') || path.includes('/m/verify')) {
        window.location.replace(buildUnifiedActivityVerifyLoginUrl())
      }
    }
    return Promise.reject(error)
  },
)