/**
 * 登录页面控制器
 *
 * @author CaiAoLin
 * @date 2017/6/1
 * @version
 */
import BaseController from "../../common/base/base_controller";
import ManagerModel from "../models/manager_model";
import crypto from "crypto";

class LoginController extends BaseController {

    /**
     * 登录页面
     *
     * @param {object} request
     * @param {object} response
     * @return {void}
     */
    index(request, response) {
        let renderData = {
            layout: false,
        };
        response.render('users/views/login/index', renderData);
    }

    /**
     * 登录操作
     *
     * @param {object} request
     * @param {object} response
     * @return {string}
     */
    async login(request, response) {
        let username = request.body.username;
        let password = request.body.password;
        let managerModel = new ManagerModel();

        let responseData = {
            error: 0,
            msg: ''
        };
        try {
            let managerData = await managerModel.findDataByCondition({username: username});

            // 没有找到对应数据
            if (managerData === null || managerData._id === undefined) {
                throw {code: 44001, err: '用户名或密码错误'};
            }

            // 加密密码
            let encryptPassword = managerModel.encryptPassword(managerData.token, password);
            if (encryptPassword !== managerData.password) {
                throw {code: 44001, err: '用户名或密码错误'};
            }

            // 成功后写入session
            let currentTime = new Date().getTime();
            let sessionToken = crypto.createHmac('sha1', currentTime + '').update(managerData.username)
                .digest().toString('base64');

            let managerSession = {
                username: managerData.username,
                loginTime: currentTime,
                sessionToken: sessionToken,
            };
            request.session.managerData = managerSession;
        } catch (error) {
            responseData.error = error.code;
            responseData.msg = error.err;
        }

        response.json(responseData);
    }

    /**
     * 退出操作
     *
     * @param {object} request
     * @param {object} response
     * @return {void}
     */
    logout(request, response) {
        // 清空session
        request.session.destroy();
        response.redirect('/login');
    }

}

export default LoginController;