import {InitServerOption} from "./types";
import * as express from "express";
import {dirname,resolve} from "path";

const WEB_ROOT = dirname(dirname(__dirname))
export function createServer(options: Partial<InitServerOption>, callback?: () => void) {
    // 创建express服务器
    const app = express();
    // 将请求体转换为JSON格式
    app.use(express.json())
    app.use(express.urlencoded({extended: true}))
    // 指定静态资源目录
    app.use('/',express.static(resolve(WEB_ROOT, "static")));
    // 监听端口
    app.listen(options.port, callback);
    // 添加允许跨域中间件
    app.use(function (req, res, next) {
        const method = req.method.toLowerCase();
        res.header("Access-Control-Allow-Origin", "*");
        res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
        // res.header("Access-Control-Allow-Credentials", "true");
        res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization");
        if (method === 'options') {
            res.status(200).end('OK');
            return;
        }
        next();
    });

    app.get('/ping', (_req, res) => {
        res.appendHeader('app-ping', 'pong')
        res.send('pong')
    })
    return app;
}