<?php

namespace App\Http\Controllers\Passport;

use App\Http\Controllers\Controller;
use App\Http\Requests\Passport\AuthRegister;
use App\Http\Requests\Passport\AuthForget;
use App\Http\Requests\Passport\AuthLogin;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Mail;
use Illuminate\Support\Facades\Cache;
use App\Models\User;
use App\Models\InviteCode;
use App\Utils\Helper;

class AuthController extends Controller
{
    public function register(AuthRegister $request)
    {
        if ((int)config('v2board.stop_register', 0)) {
            abort(500, '本站已关闭注册');
        }
        if ((int)config('v2board.invite_force', 0)) {
            if (empty($request->input('invite_code'))) {
                abort(500, '必须使用邀请码才可以注册');
            }
        }
        if ((int)config('v2board.email_verify', 0)) {
            $redisKey = 'sendEmailVerify:' . $request->input('email');
            if (empty($request->input('email_code'))) {
                abort(500, '邮箱验证码不能为空');
            }
            if (Cache::get($redisKey) !== $request->input('email_code')) {
                abort(500, '邮箱验证码有误');
            }
        }
        $email = $request->input('email');
        $password = $request->input('password');
        $exist = User::where('email', $email)->first();
        if ($exist) {
            abort(500, '邮箱已存在系统中');
        }
        $user = new User();
        $user->email = $email;
        $user->password = password_hash($password, PASSWORD_DEFAULT);
        $user->v2ray_uuid = Helper::guid(true);
        $user->token = Helper::guid();
        if ($request->input('invite_code')) {
            $inviteCode = InviteCode::where('code', $request->input('invite_code'))
                ->where('status', 0)
                ->first();
            if (!$inviteCode) {
                if ((int)config('v2board.invite_force', 0)) {
                    abort(500, '邀请码无效');
                }
            } else {
                $user->invite_user_id = $inviteCode->user_id ? $inviteCode->user_id : null;
                if (!(int)config('v2board.invite_never_expire', env('V2BOARD_INVITE_NEVER_EXPIRE'))) {
                    $inviteCode->status = 1;
                    $inviteCode->save();
                }
            }
        }

        // try out
        if ((int)config('v2board.try_out_enable', 0)) {
            $plan = Plan::find(config('v2board.try_out_plan_id'));
            if ($plan) {
                $user->transfer_enable = $plan->transfer_enable * 1073741824;
                $user->plan_id = $plan->id;
                $user->group_id = $plan->group_id;
                $user->expired_at = time() + (config('v2board.try_out_hour', 1) * 3600);
            }
        }

        if (!$user->save()) {
            abort(500, '注册失败');
        }
        if ((int)config('v2board.email_verify', 0)) {
            Cache::forget($redisKey);
        }
        return response()->json([
            'data' => true
        ]);
    }

    public function login(AuthLogin $request)
    {
        $email = $request->input('email');
        $password = $request->input('password');

        $user = User::where('email', $email)->first();
        if (!$user) {
            abort(500, '用户名或密码错误');
        }
        if (!$this->multiPasswordVerify(
            $user->password_algo,
            $password,
            $user->password)
        ) {
            abort(500, '用户名或密码错误');
        }

        if ($user->banned) {
            abort(500, '该账户已被停止使用');
        }

        $request->session()->put('email', $user->email);
        $request->session()->put('id', $user->id);
        if ($user->is_admin) {
            $request->session()->put('is_admin', true);
        }
        return response([
            'data' => [
                'is_admin' => $user->is_admin ? 2 : 1,
                'token' => $user->token
            ]
        ]);
    }

    public function token2Login(Request $request)
    {
        if ($request->input('token')) {
            $user = User::where('token', $request->input('token'))->first();
            if (!$user) {
                return header('Location:' . config('v2board.app_url'));
            }
            $code = Helper::guid();
            $key = 'token2Login_' . $code;
            Cache::put($key, $user->id, 600);
            $redirect = '/#/login?verify=' . $code . '&redirect=' . ($request->input('redirect') ? $request->input('redirect') : 'dashboard');
            if (config('v2board.app_url')) {
                $location = config('v2board.app_url') . $redirect;
            } else {
                $location = url($redirect);
            }
            return header('Location:' . $location);
        }

        if ($request->input('verify')) {
            $key = 'token2Login_' . $request->input('verify');
            $userId = Cache::get($key);
            if (!$userId) {
                abort(500, '令牌有误');
            }
            $user = User::find($userId);
            if (!$user) {
                abort(500, '用户不存在');
            }
            if ($user->banned) {
                abort(500, '该账户已被停止使用');
            }
            $request->session()->put('email', $user->email);
            $request->session()->put('id', $user->id);
            if ($user->is_admin) {
                $request->session()->put('is_admin', true);
            }
            Cache::forget($key);
            return response([
                'data' => true
            ]);
        }
    }

    public function check(Request $request)
    {
        return response([
            'data' => $request->session()->get('id') ? true : false
        ]);
    }

    public function forget(AuthForget $request)
    {
        $redisKey = 'sendEmailVerify:' . $request->input('email');
        if (Cache::get($redisKey) !== $request->input('email_code')) {
            abort(500, '邮箱验证码有误');
        }
        $user = User::where('email', $request->input('email'))->first();
        $user->password = password_hash($request->input('password'), PASSWORD_DEFAULT);
        $user->password_algo = NULL;
        if (!$user->save()) {
            abort(500, '重置失败');
        }
        Cache::forget($redisKey);
        return response([
            'data' => true
        ]);
    }

    private function multiPasswordVerify($algo, $password, $hash)
    {
        switch($algo) {
            case 'md5': return md5($password) === $hash;
            case 'sha256': return hash('sha256', $password) === $hash;
            default: return password_hash($password, PASSWORD_DEFAULT) === $hash;
        }
    }
}