<?php

// +----------------------------------------------------------------------
// | ThinkAdmin
// +----------------------------------------------------------------------
// | 版权所有 2014~2019 广州楚才信息科技有限公司 [ http://www.cuci.cc ]
// +----------------------------------------------------------------------
// | 官方网站: http://demo.thinkadmin.top
// +----------------------------------------------------------------------
// | 开源协议 ( https://mit-license.org )
// +----------------------------------------------------------------------
// | gitee 代码仓库：https://gitee.com/zoujingli/ThinkAdmin
// | github 代码仓库：https://github.com/zoujingli/ThinkAdmin
// +----------------------------------------------------------------------

namespace app\admin\controller;

use think\admin\Controller;
use think\admin\service\AdminService;
use think\admin\service\CaptchaService;
use think\admin\service\SystemService;

/**
 * 用户登录管理
 * Class Login
 * @package app\admin\controller
 */
class Login extends Controller
{

    /**
     * 后台登录入口
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public function index()
    {
        if ($this->app->request->isGet()) {
            if (AdminService::instance()->isLogin()) {
                $this->redirect(url('@admin')->build());
            } else {
                $this->title = '系统登录';
                $this->captcha = CaptchaService::instance()->getAttrs();
                $this->devmode = SystemService::instance()->checkRunMode('dev');
                $this->fetch();
            }
        }
        $data = $this->_vali([
            'username.require' => '登录账号不能为空!',
            'username.min:4'   => '登录账号长度不能少于4位有效字符！',
            'password.require' => '登录密码不能为空！',
            'password.min:4'   => '登录密码长度不能少于4位有效字符！',
            'verify.require'   => '图形验证码不能为空！',
            'uniqid.require'   => '图形验证标识不能为空！'
        ]);
        if (!CaptchaService::instance()->check($data['verify'], $data['uniqid'])) {
            $this->error('图形验证码验证失败，请重新输入!');
        }
        // 用户信息验证
        $map = ['username' => $data['username'], 'is_deleted' => '0'];
        $user = $this->app->db->name('SystemUser')->where($map)->order('id desc')->find();
        if (empty($user)) {
            $this->error('登录账号或密码错误，请重新输入!');
        }
        if (md5("{$user['password']}{$data['uniqid']}") !== $data['password']) {
            $this->error('登录账号或密码错误，请重新输入!');
        }
        if (empty($user['status'])) {
            $this->error('账号已经被禁用，请联系管理员!');
        }
        $this->app->db->name('SystemUser')->where(['id' => $user['id']])->update([
            'login_ip'  => $this->app->request->ip(),
            'login_at'  => $this->app->db->raw('now()'),
            'login_num' => $this->app->db->raw('login_num+1'),
        ]);
        $this->app->session->set('user', $user);
        sysoplog('用户登录', "用户登录系统后台成功");
        $this->success('登录成功', url('@admin')->build());
    }

    /**
     * 生成验证码
     */
    public function captcha()
    {
        $image = CaptchaService::instance();
        $this->success('生成验证码成功', [
            'image'  => $image->getData(),
            'uniqid' => $image->getUniqid(),
        ]);
    }

    /**
     * 退出登录
     */
    public function out()
    {
        $this->app->session->clear();
        $this->app->session->destroy();
        $this->success('退出登录成功!', url('@admin/login')->build());
    }

}