<?php

namespace App\Http\Controllers;

use Mail;
use View;
use Utils;
use Option;
use Session;
use App\Models\User;
use App\Models\UserModel;
use Illuminate\Http\Request;
use App\Exceptions\PrettyPageException;

class AuthController extends Controller
{
    public function login()
    {
        return view('auth.login');
    }

    public function handleLogin(Request $request)
    {
        $this->validate($request, [
            'email'    => 'sometimes|required|email',
            'username' => 'sometimes|required|username',
            'password' => 'required|min:8|max:16'
        ]);

        if ($request->has('email')) {
            $auth_type = "email";
        } elseif ($request->has('username')) {
            $auth_type = "username";
        } else {
            View::json('邮箱或角色名格式错误', 3);
        }

        // instantiate user
        $user = ($auth_type == 'email') ?
                    new User(null, ['email'    => $request->input('email')]) :
                    new User(null, ['username' => $request->input('username')]);

        if (session('login_fails', 0) > 3) {
            if (strtolower($request->input('captcha')) != strtolower(session('phrase')))
                View::json('验证码填写错误', 1);
        }

        if (!$user->is_registered) {
            View::json('用户不存在哦', 2);
        } else {
            if ($user->checkPasswd($request->input('password'))) {
                Session::forget('login_fails');

                Session::put('uid'  , $user->uid);
                Session::put('token', $user->getToken());

                $time = $request->input('keep') == true ? 86400 : 3600;

                setcookie('uid',   $user->uid, time()+$time, '/');
                setcookie('token', $user->getToken(), time()+$time, '/');

                View::json([
                    'errno' => 0,
                    'msg' => '登录成功，欢迎回来~',
                    'token' => $user->getToken()
                ]);
            } else {
                $fails = session('login_fails', 0);
                Session::put('login_fails', $fails + 1);

                View::json([
                    'errno' => 1,
                    'msg' => '邮箱或密码不对哦~',
                    'login_fails' => session('login_fails')
                ]);
            }
        }
    }

    public function logout()
    {
        if (Session::has('token')) {
            setcookie('uid',   '', time() - 3600, '/');
            setcookie('token', '', time() - 3600, '/');

            Session::flush();

            View::json('登出成功~', 0);
        } else {
            View::json('并没有有效的 session', 1);
        }
    }

    public function register()
    {
        if (Option::get('user_can_register') == 1) {
            return view('auth.register');
        } else {
            throw new PrettyPageException('残念。。本皮肤站已经关闭注册咯 QAQ', 7);
        }
    }

    public function handleRegister(Request $request)
    {
        if (strtolower($request->input('captcha')) != strtolower(session('phrase')))
            View::json('验证码填写错误', 1);

        $this->validate($request, [
            'email'    => 'required|email',
            'password' => 'required|min:8|max:16',
            'nickname' => 'required|nickname|max:255'
        ]);

        $user = new User(null, ['email' => $request->input('email')]);

        if (!$user->is_registered) {
            if (Option::get('user_can_register') == 1) {
                $ip = get_real_ip();

                // If amount of registered accounts of IP is more than allowed amounts,
                // then reject the register.
                if (UserModel::where('ip', $ip)->count() < Option::get('regs_per_ip'))
                {
                    // register new user
                    $user = $user->register($request->input('password'), $ip);
                    $user->setNickName($request->input('nickname'));

                    // set cookies
                    setcookie('uid',   $user->uid, time() + 3600, '/');
                    setcookie('token', $user->getToken(), time() + 3600, '/');

                    View::json([
                        'errno' => 0,
                        'msg' => '注册成功，正在跳转~',
                        'token' => $user->getToken()
                    ]);

                } else {
                    View::json('你最多只能注册 '.Option::get('regs_per_ip').' 个账户哦', 7);
                }
            } else {
                View::json('残念。。本皮肤站已经关闭注册咯 QAQ', 7);
            }
        } else {
            View::json('这个邮箱已经注册过啦，换一个吧', 5);
        }
    }

    public function forgot()
    {
        if (config('mail.host') != "") {
            return view('auth.forgot');
        } else {
            throw new PrettyPageException('本站已关闭重置密码功能', 8);
        }
    }

    public function handleForgot(Request $request)
    {
        if (strtolower($request->input('captcha')) != strtolower(session('phrase')))
            View::json('验证码填写错误', 1);

        if (config('mail.host') == "")
            View::json('本站已关闭重置密码功能', 1);

        if (session()->has('last_mail_time') && (time() - session('last_mail_time')) < 60)
            View::json('你邮件发送得太频繁啦，过 60 秒后再点发送吧', 1);

        $user = new User(null, ['email' => $request->input('email')]);

        if (!$user->is_registered)
            View::json('该邮箱尚未注册', 1);

        $mail = new Mail();

        $mail->from(Option::get('site_name'))
             ->to($request->input('email'))
             ->subject('重置您在 '.Option::get('site_name').' 上的账户密码');

        $uid   = $user->uid;
        $token = base64_encode($user->getToken().substr(time(), 4, 6).Utils::generateRndString(16));

        $url = Option::get('site_url')."/auth/reset?uid=$uid&token=$token";

        $mail->content(View::make('auth.mail')->with('reset_url', $url)->render());

        if (!$mail->send()) {
            View::json('邮件发送失败，详细信息：'.$mail->getLastError(), 2);
        } else {
            Session::put('last_mail_time', time());
            View::json('邮件已发送，一小时内有效，请注意查收.', 0);
        }

    }

    public function reset()
    {
        if (isset($_GET['uid']) && isset($_GET['token'])) {
            $user = new User($_GET['uid']);
            if (!$user->is_registered)
                return redirect('auth/forgot')->with('msg', '无效的链接');

            $token = substr(base64_decode($_GET['token']), 0, -22);

            if ($user->getToken() != $token) {
                return redirect('auth/forgot')->with('msg', '无效的链接');
            }

            $timestamp = substr(base64_decode($_GET['token']), strlen($token), 6);

            // more than 1 hour
            if ((substr(time(), 4, 6) - $timestamp) > 3600) {
                return redirect('auth/forgot')->with('msg', '链接已过期');
            }

            return View::make('auth.reset')->with('user', $user);
        } else {
            return redirect('auth/login')->with('msg', '非法访问');
        }
    }

    public function handleReset(Request $request)
    {
        $this->validate($request, [
            'uid'      => 'required|integer',
            'password' => 'required|min:8|max:16',
        ]);

        $user = new User($request->input('uid'));

        $user->changePasswd($request->input('password'));

        View::json('密码重置成功', 0);

    }

    public function captcha()
    {
        $builder = new \Gregwar\Captcha\CaptchaBuilder;
        $builder->build($width = 100, $height = 34);
        Session::put('phrase', $builder->getPhrase());
        $builder->output();

        return \Response::png();
    }

}