import axios from "axios";
import {
    ElNotification,
    ElMessageBox,
    ElMessage,
} from "element-plus";
import { tansParams } from "@/utils/ruoyi";
import cache from "@/plugins/cache";
import { getToken, removeToken } from "@/utils/auth";
import router from '@/router';
import { useMeterStore } from '@/stores/modules/meter'

axios.defaults.headers["Content-Type"] = "application/json;charset=utf-8";
const meterStore = useMeterStore()
meterStore.initUdid()
// 创建axios实例
const service = axios.create({
    // axios中请求配置有baseURL选项，表示请求URL公共部分
    baseURL: import.meta.env.VITE_APP_BASE_API,
    // 超时
    timeout: 10000,
});

// request拦截器
service.interceptors.request.use(
    (config) => {

        // 是否需要设置 token
        const isToken = (config.headers || {}).isToken === false;
        if (getToken() && !isToken) {
            config.headers["Authorization"] = "Bearer " + getToken(); // 让每个请求携带自定义token 请根据实际情况自行修改
        }

        // 是否需要防止数据重复提交
        const isRepeatSubmit = (config.headers || {}).repeatSubmit === false;
        if (meterStore.getSudid()) { 
            config.headers["X-User-Agent"] = `gxtech/web 1.0.0: c=GxTech, udid=${meterStore.getSudid()}, sv=15.4.1, app=stt`;
        }
        // get请求映射params参数
        if (config.method === "get" && config.params) {

            let url = config.url + "?" + tansParams(config.params);
            url = url.slice(0, -1);
            config.params = {};
            config.url = url;
        }
        if (
            !isRepeatSubmit &&
            (config.method === "post" || config.method === "put")
        ) {
            const requestObj = {
                url: config.url,
                data:
                    typeof config.data === "object"
                        ? JSON.stringify(config.data)
                        : config.data,
                time: new Date().getTime(),
            };
            const requestSize = Object.keys(JSON.stringify(requestObj)).length; // 请求数据大小
            const limitSize = 5 * 1024 * 1024; // 限制存放数据5M
            if (requestSize >= limitSize) {
                console.warn(
                    `[${config.url}]: ` +
                    "请求数据大小超出允许的5M限制，无法进行防重复提交验证。"
                );
                return config;
            }
            const sessionObj = cache.session.getJSON("sessionObj");
            if (
                sessionObj === undefined ||
                sessionObj === null ||
                sessionObj === ""
            ) {
                cache.session.setJSON("sessionObj", requestObj);
            } else {
                const s_url = sessionObj.url; // 请求地址
                const s_data = sessionObj.data; // 请求数据
                const s_time = sessionObj.time; // 请求时间
                const interval = 1000; // 间隔时间(ms)，小于此时间视为重复提交
                if (
                    s_data === requestObj.data &&
                    requestObj.time - s_time < interval &&
                    s_url === requestObj.url
                ) {
                    const message = "数据正在处理，请勿重复提交";
                    console.warn(`[${s_url}]: ` + message);
                    return Promise.reject(new Error(message));
                } else {
                    cache.session.setJSON("sessionObj", requestObj);
                }
            }
        }
        return config;
    },
    (error) => { 
        Promise.reject(error);
    }
);

service.interceptors.response.use(
    (response) => {  
        // 1. 检查响应是否存在
        if (!response) {
            ElMessage.error('无响应数据');
            return Promise.reject(new Error('无响应数据'));
        }  
        // 2. 安全获取响应数据和状态码
        const responseData = response.data || {};
        const statusCode = response.status;
        const businessCode = responseData.meta?.code || statusCode;

        // 3. 二进制数据直接返回
        if (
            response.request.responseType === 'blob' ||
            response.request.responseType === 'arraybuffer'
        ) {
            return responseData;
        }

        // 4. 根据业务码处理不同情况
        switch (businessCode) {
            case 200:
            case 201:
                return Promise.resolve(responseData); 
            case 401: 
                return Promise.resolve(responseData);
                // return handleUnauthorized().then(() => {
                //     return Promise.reject({ code: 401, message: '未授权' });
                // });

            case 500:
                const serverErrorMsg = responseData.meta?.message || '服务器内部错误';
                ElMessage({ message: serverErrorMsg, type: 'error' });
                return Promise.reject({ code: 500, message: serverErrorMsg });

            default:
                const errorMsg = responseData.meta?.message || `业务错误 (${businessCode})`;
                ElNotification.error({ title: errorMsg });
                return Promise.reject({ code: businessCode, message: errorMsg });
        }
    },
    (error) => { 
        let { message } = error;
        let code = error?.response?.status || -1; 
        if (message == 'Network Error') {
            message = '后端接口连接异常';
            ElMessage({ message, type: 'error', duration: 5 * 1000 });
        } else if (message.includes('timeout')) {
            message = '系统接口请求超时';
            ElMessage({ message, type: 'error', duration: 5 * 1000 });
        } else if (message.includes('Request failed with status code')) {
            // message = '系统接口' + message.substr(message.length - 3) + '异常';
        } 

        // 返回结构化错误
        return Promise.reject({
            code,
            message,
            raw: error // 保留原始 error
        });
    }
);

// 单独处理401未授权
function handleUnauthorized() {
    return ElMessageBox.confirm(
        '认证信息已失效，您可以继续留在该页面，或者重新登录',
        '系统提示',
        {
            confirmButtonText: '重新登录',
            cancelButtonText: '取消',
            type: 'warning',
        }
    )
        .then(() => {
            removeToken()
            if (router.currentRoute.path !== '/login') {
                router.push({
                    path: '/login',
                    query: { redirect: router.currentRoute.fullPath }
                });
            } else {
                // 如果在登录页，强制刷新以清除残留状态
                window.location.reload();
            }
        })
        .catch(() => {
            return Promise.reject('用户取消操作');
        });
}

export default service;