import axios from 'axios';
import { CACHE_KEY } from '@/constants';
import { Local, Session } from '@/utils/storage';

const api = axios.create({
  baseURL: import.meta.env.VITE_SCIENTIFIC_API_URL || import.meta.env.VITE_API_URL, 
  timeout: 1000 * 60,
  responseType: 'json',
  paramsSerializer: {
    serialize: (params) => {
      // 简单的参数序列化，替代 qs
      return Object.keys(params)
        .map(key => {
          const val = params[key];
          if (val === undefined || val === null) return '';
          if (Array.isArray(val)) {
            return val.map(v => `${encodeURIComponent(key)}=${encodeURIComponent(v)}`).join('&');
          }
          return `${encodeURIComponent(key)}=${encodeURIComponent(val)}`;
        })
        .filter(p => p !== '')
        .join('&');
    },
  },
});

api.interceptors.request.use((request) => {
  // 设置请求头
  if (request.headers) {
    const token = uni.getStorageSync('SCITOKEN');
    if (token) {
      request.headers.Authorization = 'Bearer ' + token;
    }
  }
  return request;
});

api.interceptors.response.use(
  (response) => {
    // 如果是 blob 响应，直接返回
    if (response.config.responseType === 'blob') {
      return response;
    }

    if (response.data.code === 200) {
      return Promise.resolve(response.data);
    } else if (response.data.code === 401) {
      uni.showModal({
        title: '系统提示',
        content: '登录状态已过期，您可以继续留在该页面，或者重新登录',
        confirmText: '重新登录',
        cancelText: '取消',
        success: function (modalRes) {
          if (modalRes.confirm) {
            Session.clear();
            Local.remove(CACHE_KEY.TOKEN);
            uni.reLaunch({
              url: '/pages/login/index'
            });
          }
        }
      });
      return Promise.reject(response.data);
    } else {
      const msg = response.data.msg || '系统错误';
      uni.showToast({ title: msg, icon: 'none' });
      return Promise.reject(response.data);
    }

    return Promise.resolve(response.data);
  },
  async (error) => {
    let message = error.message;
    if (message === 'Network Error') {
      message = '后端网络故障';
    } else if (message.includes('timeout')) {
      message = '接口请求超时';
    }
    uni.showToast({ title: message, icon: 'none' });
    return Promise.reject(error);
  }
);

export default api;