import {RouteHandleFunction} from "../core/types.ts";
import {login} from "../service/app.ts";
import {UserModel} from "../../model";

export function encodeUserToken(user: UserModel) {
    if (user == null) throw new Error('user is null')
    const token = JSON.stringify(user)
    return btoa(encodeURIComponent(token));
}

export function decodeUserToken(token: string) {
    // 将token转回UserModel对象数据
    const user = decodeURIComponent(atob(token));
    return JSON.parse(user) as UserModel
}


export const loginHandler: RouteHandleFunction
    = async ({
                 body, res
             }) => {
    if (!body.username || !body.password) {
        // 没有用户名或者密码
        res.send({code: 2, message: '用户名和密码不能为空'})
        return;
    }
    const userinfo = await login(body.username, body.password);
    if (!userinfo) {
        res.send({code: 1, message: '用户名或密码错误'})
        return;
    }
    res.send({
        code: 0, data: {
            ...userinfo,
            token: encodeUserToken(userinfo)
        }
    })
}

export const getUserInfo: RouteHandleFunction =
    ({headers, res}) => {
        const token = headers.Authorization
        const user = decodeUserToken(token)
        res.send({code: 0, message: '登录成功', data: user})
    }