const express = require("express");
const router = express.Router();
const db = require("../db/mysql");

const jwt = require("../utils/jwt");

router.post("/login", (req, res) => {
    const { username, password } = req.body;
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
    const sql = `
    SELECT * FROM chat_mysql.users
    WHERE username = ? AND password = ?;
  `;
    db.query(sql, [username, password], (error, results) => {
        if (error) {
            console.error("数据库查询失败：", error);

            return res.status(500).json({
                code: 500,
                message: "登录失败",
            });
        }
        if (results.length > 0) {
            // 生成 JWT token
            const token = jwt.createToken({
                userId: results[0].user_id,
                username: results[0].username,
            });
            res.json({
                code: 200,
                message: "登录成功",
                data: {
                    token: token,
                    username: results[0].username,
                },
            });
        } else {
            res.json({
                code: 401,
                message: "用户名或密码错误",
                data: null,
            });
        }
    });
});

router.post("/register", (req, res) => {
    const { username, password } = req.body;

    const sql = `
    INSERT INTO users (username, password)
    VALUES (?, ?)
  `;

    db.query(sql, [username, password], (error, result) => {
        if (error) {
            console.error(error);

            return res.status(500).json({
                code: 500,
                message: "注册失败",
            });
        }

        res.json({
            code: 200,
            message: "注册成功",
            data: {
                id: result.insertId,
            },
        });
    });
});

module.exports = router;