<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\User;
use App\UserVerification;
use JWTAuth;
use Aloha\Twilio\Twilio;
use Tymon\JWTAuth\Exceptions\JWTException;
use Validator, DB, Hash, Mail, Illuminate\Support\Facades\Password;

class AuthController extends Controller
{
    /**
     * API Send verification code 
     *
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function sendVerification(Request $request){
        $credentials = $request->only('phone');
        $rules = [
            'phone' => 'required|digits:10|unique:users'
        ];
        $validator = Validator::make($credentials, $rules);

        // create user if not exist 
        $user = User::firstOrNew([
                        'phone' => $request->phone
        ]);
        $user->save();

        // create token if not exist, update if exist 
        $token = mt_rand(0000,9999); 
        $user_verification = $user->phoneVerification()->firstOrNew([
            'user_id' => $user->id,
        ]);
        $user_verification->token = $token;
        $user_verification->save();

        // send token to phone 
        // ** switching to nexmo ** 
        //$message = "IZYIM verification code : ". $token;
        //$twilio = new Twilio(env('TWILIO_ACC'), env('TWILIO_TOKEN'), env('TWILIO_NUMBER'));
        //$twilio->message($request->phone, $message);
        return response()->json(['success'=> true, 'message'=> 'A verification code has been send to your mobile number.' ]);

    }
    
    /**
     * API Verify User
     *
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function verifyUser(Request $request)
    {
        $credentials = $request->only('phone', 'token');

        // check if user already verified 
        $check_user = User::where('phone', $request->phone)->first();
        if(!is_null($check_user)){
            if($check_user->is_verified == 1){
                return response()->json([
                    'success'=> true,
                    'message'=> 'Account already verified.'
                ]);
            }
        }
        else{
            return response()->json([
                'success'=> false,
                'message'=> 'Please contact support.'
            ]);
        }

        // check and verify valid token 
        $check_token = $check_user->phoneVerification()->where('token', $request->token)->first();
        if(!is_null($check_token)){
            $check_user->is_verified = 1;
            $check_user->save();
            $check_token->delete();
            return response()->json([
                'success'=> true,
                'message'=> 'Completed'
            ]);
        }
        return response()->json(['success'=> false, 'error'=> "Verification code is invalid."]);
    }

    /**
     * API Register
     *
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function register(Request $request)
    {
        $credentials = $request->only('name', 'phone', 'password', 'confirm_password');
        
        $rules = [
            'name' => 'required|max:255',
            'phone' => 'required|digits:10|unique:users',
            'password' => 'required|confirmed|min:6'
        ];
        $validator = Validator::make($credentials, $rules);
        if($validator->fails()) {
            return response()->json(['success'=> false, 'error'=> $validator->messages()]);
        }
        $name = $request->name;
        $phone = "+6" . $request->phone;
        $password = $request->password;
        
        $user = User::create(['name' => $name, 'phone' => $phone, 'password' => Hash::make($password)]);
        $verification_code = rand (0000,9999); //Generate verification code
        DB::table('user_verifications')->insert(['user_id'=>$user->id,'token'=>$verification_code]);
        
        // send SMS
        $message = "IZYIM verification code : 12332";
        $twilio = new Twilio(env('TWILIO_ACC'), env('TWILIO_TOKEN'), env('TWILIO_NUMBER'));
        $twilio->message($phone, $message);

        return response()->json(['success'=> true, 'message'=> 'A verification code has been send to your mobile number.']);
    }

    /**
     * API Login, on success return JWT Auth token
     *
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function login(Request $request)
    {
        $credentials = $request->only('phone', 'password');
        
        $rules = [
            'phone' => 'required|digits:10|unique:users',
            'password' => 'required',
        ];
        $validator = Validator::make($credentials, $rules);
        if($validator->fails()) {
            return response()->json(['success'=> false, 'error'=> $validator->messages()]);
        }
        
        $credentials['is_verified'] = 1;
        
        try {
            // attempt to verify the credentials and create a token for the user
            if (! $token = JWTAuth::attempt($credentials)) {
                return response()->json(['success' => false, 'error' => 'We cant find an account with this credentials. Please make sure you entered the right information and you have verified your email address.'], 401);
            }
        } catch (JWTException $e) {
            // something went wrong whilst attempting to encode the token
            return response()->json(['success' => false, 'error' => 'Failed to login, please try again.'], 500);
        }
        // all good so return the token
        return response()->json(['success' => true, 'data'=> [ 'token' => $token ]]);
    }

    /**
     * Log out
     * Invalidate the token, so user cannot use it anymore
     * They have to relogin to get a new token
     *
     * @param Request $request
     */
    public function logout(Request $request) {
        $this->validate($request, ['token' => 'required']);
        
        try {
            JWTAuth::invalidate($request->input('token'));
            return response()->json(['success' => true, 'message'=> "You have successfully logged out."]);
        } catch (JWTException $e) {
            // something went wrong whilst attempting to encode the token
            return response()->json(['success' => false, 'error' => 'Failed to logout, please try again.'], 500);
        }
    }

     /**
     * API Recover Password
     *
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function recover(Request $request)
    {
        $user = User::where('email', $request->email)->first();
        if (!$user) {
            $error_message = "Your email address was not found.";
            return response()->json(['success' => false, 'error' => ['email'=> $error_message]], 401);
        }
        try {
            Password::sendResetLink($request->only('email'), function (Message $message) {
                $message->subject('Your Password Reset Link');
            });
        } catch (\Exception $e) {
            //Return with error
            $error_message = $e->getMessage();
            return response()->json(['success' => false, 'error' => $error_message], 401);
        }
        return response()->json([
            'success' => true, 'data'=> ['message'=> 'A reset email has been sent! Please check your email.']
        ]);
    }
}