<?php

namespace AuthBundle\Security\Firewall;

use AuthBundle\Services\AccessTokenService;
use Base\OAuthClientBundle\Security\Core\User\CustomOAuthUser;
use HWI\Bundle\OAuthBundle\Security\Core\Authentication\Token\OAuthToken;
use Monolog\Logger;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\Security\Core\Authentication\AuthenticationManagerInterface;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Core\Exception\AuthenticationException;
use Symfony\Component\Security\Core\Exception\BadCredentialsException;
use Symfony\Component\Security\Http\Firewall\ListenerInterface;
use Symfony\Component\HttpFoundation\Request;


class OAuthProxyListener implements ListenerInterface
{

    /**
     * @var TokenStorageInterface
     */
    protected $tokenStorage;

    /**
     * @var AuthenticationManagerInterface
     */
    protected $authenticationManager;

    /**
     * @var AccessTokenService
     */
    protected $accessTokenService;
    /**
     * @var Logger
     */
    private $logger;

    /**
     * @param TokenStorageInterface $tokenStorage
     * @param AuthenticationManagerInterface $authenticationManager
     * @param AccessTokenService $accessTokenService
     */
    public function __construct(TokenStorageInterface $tokenStorage, AuthenticationManagerInterface $authenticationManager, AccessTokenService $accessTokenService)
    {
        $this->tokenStorage = $tokenStorage;
        $this->authenticationManager = $authenticationManager;
        $this->accessTokenService = $accessTokenService;
    }

    /**
     * @param Logger $logger
     */
    public function setLogger(Logger $logger)
    {
        $this->logger = $logger;
    }


    /**
     * Se crea el User y Token mediante alguno de los métodos
     *
     * 1. Http Basic
     * 2. Authorization
     * 3. Client Ip
     * 4. Firewalls
     *
     * @param GetResponseEvent $event
     * @return type
     *
     */
    public function handle(GetResponseEvent $event)
    {
        $request = $event->getRequest();
        $messageLog = "";
        // verifico si la ip esta bloqueada. Se utiliza la variable API_CIDR_DENY para almacenar las ip o rangos de ip
        if (\AuthBundle\Utils\IpUtils::checkIpDeny($request->getClientIp())) {
            $messageLog = "Deny IP: " . $request->getClientIp();
            $error = true;
        } else if (($this->tokenStorage != null &&
            $this->tokenStorage->getToken() != null &&
            $this->tokenStorage->getToken() instanceof OAuthToken)) {
            // como los firewalls comparten info a traves del context no tengo que hacer nada, ya esta logueado.
            $messageLog = "Firewalls (IP: " . $request->getClientIp() . ")";
            $error = false;
        } else if ($request->headers->has("php-auth-user") && $request->headers->has("php-auth-pw")) {
            $messageLog = "PHP-AUTH (IP: " . $request->getClientIp() . ")";
            // el header contiene php-auth-user && php-auth-pw
            $error = !$this->PHPAuth($request);
        } else if($request->headers->has("microservice") && $request->headers->has("authorization")){
            $messageLog = "AUTHORIZATION A (IP: " . $request->getClientIp() . ")";
            $error = !$this->PHPMicroservice($request);
        } elseif ($request->headers->has("authorization") && !$request->headers->has("microservice")) {
            $messageLog = "AUTHORIZATION A (IP: " . $request->getClientIp() . ")";
            // el header contiene authorization
            $error = !$this->PHPAuthorization($request);
        } elseif ($request->getClientIp()) {
            $messageLog = "AUTHORIZATION B (IP: " . $request->getClientIp() . ")";
            $error = !$this->clientIp($request);
        } else {
            $messageLog = "NO REFERENCE. DENY ALL.";
            $error = true;
        }

        if ($error) {
            $this->logger->info("ERROR - " . $messageLog);
            $this->deny($event);
        } else {
            $this->logger->info("OK - " . $messageLog);
        }
    }

    /**
     * @param GetResponseEvent $event
     */
    private function deny(GetResponseEvent $event)
    {
        $this->tokenStorage->setToken(null);

        $response = new Response();
        $response->setStatusCode(Response::HTTP_FORBIDDEN);
        $event->setResponse($response);

        echo 'The OAuth authentication failed.' . PHP_EOL;

        return;
    }

    /**
     * @param Request $request
     * @return bool Retorna TRUE si pudo crear y setear el CustomOAuthUser
     */
    private function PHPAuth(Request $request)
    {
        $username = $request->headers->get("php-auth-user");
        $password = $request->headers->get("php-auth-pw");
        $token = $this->accessTokenService->getToken($username, $password);
        unset($token['user_info']);
        $accessToken = $token;
        $auth_info = $this->accessTokenService->getUserInfo($username, $password);
        return $this->createCustomOAuthUser($username, $accessToken, $auth_info);
    }

    /**
     * @param Request $request
     * @return bool Retorna TRUE si pudo crear y setear el CustomOAuthUser
     */
    private function PHPMicroservice($request)
    {
        $authorization = $request->headers->get("authorization");
        $clientId = $request->headers->get('clientid');
        $clientSecret = $request->headers->get('clientsecret');

        $pieces = explode(' ', $authorization);
        $accessToken = array(
            'access_token' => $pieces[1],
        );
        if(getenv('OAUTH_CLIENT_ID') != $clientId || getenv('OAUTH_CLIENT_SECRET') != $clientSecret){
            return false;
        }

        $auth_info = [
            'username' => 'Microservice',
            'roles' => [
                'ROLE_USER'
            ],
            'hasIntercom' => false,
            'tenancyCurrent' => null,
            'tenancies' => []
        ];

        if (isset($auth_info['username'])) {
            $username = $auth_info['username'];
            return $this->createCustomOAuthUser($username, $accessToken, $auth_info);
        } else {
            return false;
        }
    }

    /**
     * Crea el custom user.
     * @param string $username
     * @param array $accessToken
     * @param array $auth_info
     * @return bool Retorna TRUE si pudo crear el CustomOAuthUser
     */
    private function createCustomOAuthUser(string $username, array $accessToken, array $auth_info)
    {
        try {
            $user = new CustomOAuthUser($username);
            if (count($auth_info)) {
                $user->setRoles($auth_info['roles']);
                $user->setTenancies($auth_info['tenancies']);
                $user->setTenancyCurrent($auth_info['tenancyCurrent']);
                $user->setHasIntercom($auth_info['hasIntercom']);
            }

            $token = new OAuthToken($accessToken, $user->getRoles());
            $token->setUser($user);

            $authToken = $this->authenticationManager->authenticate($token);
            $this->tokenStorage->setToken($authToken);

            return true;
        } catch (\Exception $failed) {
            //var_dump($failed->getMessage());
            return false;
        }
    }

    /**
     * @param Request $request
     * @return bool Retorna TRUE si pudo crear y setear el CustomOAuthUser
     */
    private function PHPAuthorization($request)
    {
        $authorization = $request->headers->get("authorization");
        $pieces = explode(' ', $authorization);
        $accessToken = array(
            'access_token' => $pieces[1],
        );
        $auth_info = $this->accessTokenService->requestUserInfo($authorization);
        if (isset($auth_info['username'])) {
            $username = $auth_info['username'];
            return $this->createCustomOAuthUser($username, $accessToken, $auth_info);
        } else {
            return false;
        }
    }

    /**
     * @param Request $request
     * @return bool Retorna TRUE si pudo crear y setear el CustomOAuthUser
     */
    private function clientIp($request)
    {
        $username = $clientIp = $request->getClientIp();

        if (\AuthBundle\Utils\IpUtils::checkIp($clientIp) === false) {
            return false;
        }
        // @TODO: Generar access token para el caso de IP valida
        $accessToken = array(
            'access_token' => '',
        );
        $auth_info['roles'] = array('ROLE_USER');
        // @TODO: Traer la tenencia Base de la app Base

        $filter = $request->query->get('filters');

        if(isset($filter['tenancyId']) && $filter['tenancyId'] != 1) {
            $tenancy = array(
                array('id' => 1,'name' => 'Tenencia Base',),
                array('id' => (int) $filter['tenancyId'], 'name' => 'Tenancy Fix'));
        } else {
            $tenancy = array(array(
                'id' => 1,
                'name' => 'Tenencia Base',
            ));
        }

        $auth_info['tenancies'] = $tenancy;
        $auth_info['tenancyCurrent'] = end($tenancy);

        return $this->createCustomOAuthUser($username, $accessToken, $auth_info);
    }
}