<?php

namespace app\admin\controller;

use extcore\traits\Verify;
use think\Db;
use think\Exception;

/**
 * 后台登录
 * Class LoginController
 * @package app\admin\controller
 */
class LoginController extends BaseController
{

    public function initialize()
    {
        parent::initialize();

        $action = strtolower($this->request->action());
        if ($this->mid && $action != 'logout') {
            $this->success(lang('You\'r already logged in!'), url('admin/index/index'));
        }
    }

    /**
     * 登陆主页
     * @return mixed
     * @throws \Throwable
     */
    public function index()
    {
        $this->autoLogin();
        if ($this->mid) {
            $this->success('已自动登录', url('admin/index/index'));
        }

        $this->assign('config', getSettings());
        return $this->fetch();
    }

    /**
     * 登陆验证
     */
    public function login()
    {
        if (!$this->request->isPost()) $this->error(lang('Bad Request!'));

        $username = $this->request->post('username', '', 'trim');
        $password = $this->request->post('password');

        if (empty($username) || empty($password)) {
            $this->error(lang('Please fill in the login field!'));
        }

        //验证验证码是否正确
        if (!($this->check_verify($this->request->post()))) {
            $this->error(lang('Verify code error!'));
        }

        $sess_key = 'back_login_error';
        $error_count = session($sess_key);
        if (is_null($error_count)) {
            $error_count = 0;
        } elseif ($error_count > 5) {
            $this->error(lang('Login error of too many times!'));
        }

        $ip = $this->request->ip();
        $cache_key = 'back_login_error_' . str_replace(['.', ':'], ['_', '-'], $ip);
        $iperror_count = cache($cache_key);
        if (is_null($iperror_count)) {
            $iperror_count = 0;
        } elseif ($iperror_count > 10) {
            $this->error(lang('Login error of too many times!'));
        }

        //验证账号密码是否正确
        $user = Db::name('Manager')->where('username', $username)->find();

        if (empty($user) || $user['password'] !== encode_password($password, $user['salt'])) {

            $error_count++;
            $iperror_count++;
            session($sess_key, $error_count);
            cache($cache_key, $iperror_count, ['expire' => 3600]);

            if (!empty($user)) {
                //登录日志
                user_log($user['id'], 'login', 0, ['Incorrect password: %s', $password], 'manager');
            }
            $this->error(lang('Account or password incorrect!'));
        }

        //登录成功清除限制
        session($sess_key, null);
        cache($cache_key, null);

        //验证账户是否被禁用
        if ($user['status'] == 0) {
            user_log($user['id'], 'login', 0, lang('Account is disabled!'), 'manager');
            $this->error(lang('Account is disabled, pls contact the super master!'));
        }

        //密码复杂度检查
        check_password($password);

        setLogin($user);
        $remember = $this->request->post('remember');
        if ($remember) {
            $this->setAutoLogin($user);
        }

        $this->success(lang('Login success!'), url('admin/index/index'));
    }

    use Verify;

    /**
     * 验证码
     * @return \think\Response
     */
    public function verify()
    {
        return $this->verify_auto('backend', getSettings());
    }

    protected function check_verify($data)
    {
        return $this->check_verify_auto('backend', $data, getSettings());
    }

    /**
     * 退出登录
     */
    public function logout()
    {
        clearLogin();
        $this->success('退出成功', url('admin/login/index'));
    }
}
