import axios, {type AxiosInstance,AxiosError} from 'axios';
import {type WeatherData} from "@/store/weatherStore";

//配置常量
const API_KEY = '5097cc3212ea9c460b01e2be936c94d5';
const BASE_URL = 'http://api.weatherstack.com';
//创建axios实例 统一设置请求头
const apiClient: AxiosInstance = axios.create({
  baseURL: BASE_URL,
  timeout: 10000,
  headers: {
    'Content-Type': 'application/json',
  },
});
//请求拦截器
apiClient.interceptors.request.use( 
  //添加api——key到每个请求
  (config) => {
    config.params = {
      ...config.params,
      access_key: API_KEY,
    };
    //打印请求信息
    if (process.env.NODE_ENV === 'development'){
      console.log('API Request:', config.method ?.toUpperCase(), config.url);
    }
    return config;
  },
  (error) => {
    console.error('Request Error:' ,error);
    return Promise.reject(error);
  }
);
//响应拦截器
apiClient.interceptors.response.use(
  (response) => { 
    if (response.data && response.data.error){
      const error = response.data.error;
      console.error('API Error:', error);
      throw new Error(error.info || '请求失效');
    }
    //打印响应
    if (process.env.NODE_ENV === 'development'){
      console.log('API Response:', response.config.url,response.data);
    }
    return response;
  },
  (error :AxiosError) =>{
    //统一错误处理
    console.error('Response Error:',error.message);
    if (error.response) {
        const status = error.response.status;
        switch (status) {
            case 404:
                return Promise.reject(new Error('未找到该城市，请检查城市名称'));
            case 401:
                return Promise.reject(new Error('API认证失败，请检查API'));
            case 403:
                return Promise.reject(new Error('访问被拒绝，请检查API订阅计划'));
            case 429:
                return Promise.reject(new Error('请求过于频繁，请稍后再试'));
            default:
                return Promise.reject(new Error('服务器错误，请稍后再试'));
        }
    }else if (error.request ){
        return Promise.reject(new Error('网络连接失败，请检查网络'));
    }else{
         return Promise.reject(new Error('请求配置错误'));
    }
    }
);
//weather API
    export class WeatherAPI{
        static async getCurrentWeather(city: string): Promise<WeatherData> {
            try {
                const response = await apiClient.get<WeatherData>('/current',{
                    params:{query :city} ,
                });
                return response.data;
        }catch (error){
            throw error;
        }
    }
    }
    export default apiClient;