/** axios 实例：自动携带 token、统一处理 401/付费墙 */
import axios from 'axios'
import { ElMessage } from 'element-plus'
import router from '../router'

export const http = axios.create({ baseURL: '/', timeout: 30000 })

http.interceptors.request.use(cfg => {
  const token = localStorage.getItem('hmc_token')
  if (token) cfg.headers.Authorization = `Bearer ${token}`
  return cfg
})

http.interceptors.response.use(
  res => {
    const d = res.data
    if (d && typeof d === 'object' && 'code' in d) {
      if (d.code === 1) return res
      if (String(d.code) === '10086') {
        ElMessage.warning(d.message ?? '该功能需要购买解锁')
        return Promise.reject(new Error(d.message))
      }
      if (Number(d.code) === 401) {
        localStorage.removeItem('hmc_token')
        router.push('/login')
        return Promise.reject(new Error(d.message))
      }
      ElMessage.error(d.message ?? '操作失败')
      return Promise.reject(new Error(d.message))
    }
    return res
  },
  err => {
    ElMessage.error(err.message ?? '网络错误')
    return Promise.reject(err)
  },
)

/** 提取 envelope 的 data */
export async function api<T = any>(method: string, url: string, body?: object): Promise<T> {
  const res = await http.request({ method, url, data: body })
  return res.data.data as T
}

/** 下载二进制文件（自动带 token），filename 为保存文件名 */
export async function apiDownload(url: string, filename: string): Promise<void> {
  const res = await http.get(url, { responseType: 'blob' })
  const link = document.createElement('a')
  link.href = URL.createObjectURL(res.data)
  link.download = filename
  link.click()
  URL.revokeObjectURL(link.href)
}

/** 上传文件（multipart，自动带 token），返回 envelope data */
export async function apiUpload<T = any>(url: string, file: File): Promise<T> {
  const fd = new FormData()
  fd.append('file', file)
  const res = await http.post(url, fd, { headers: { 'Content-Type': 'multipart/form-data' } })
  return res.data.data as T
}