<?php

namespace App\Service;

use DateTime;
use DateInterval;
use App\Entity\User;
use App\Exception\DiscordApiException;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Contracts\HttpClient\HttpClientInterface;
use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
use Symfony\Contracts\HttpClient\Exception\ClientExceptionInterface;
use Symfony\Contracts\HttpClient\Exception\ServerExceptionInterface;
use Symfony\Contracts\HttpClient\Exception\RedirectionExceptionInterface;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\Session\SessionInterface;

class DiscordApiService
{
    private $client;
    private $clientId;
    private $clientSecret;
    private $clientToken;
    private $redirectUri;
    private $baseUrl;

    public function __construct(HttpClientInterface $client)
    {
        $this->client = $client;
        $this->clientId = $_ENV['DISCORD_CLIENT_ID'];
        $this->clientSecret = $_ENV['DISCORD_CLIENT_SECRET'];
        $this->clientToken = $_ENV['DISCORD_CLIENT_TOKEN'];
        $this->redirectUri = $_ENV['DISCORD_BACKEND_REDIRECT_URI'];
        $this->baseUrl = $_ENV['DISCORD_API_BASE_URL'];
    }

    public function exchangeCodeForToken(string $code): array
    {
        try {
            $response = $this->client->request('POST', $this->baseUrl . '/oauth2/token', [
                'body' => [
                    'client_id' => $this->clientId,
                    'client_secret' => $this->clientSecret,
                    'grant_type' => 'authorization_code',
                    'code' => $code,
                    'redirect_uri' => $this->redirectUri,
                ],
            ]);
            return $response->toArray();
        } catch (ClientExceptionInterface | ServerExceptionInterface | RedirectionExceptionInterface | TransportExceptionInterface $e) {
            throw new DiscordApiException($e->getCode(), 'Erreur lors de la requête à l\'API Discord: ' . $e->getMessage(), $e);
        }
    }

    public function refreshToken(string $refreshToken): array
    {
        try {
            $response = $this->client->request('POST', $this->baseUrl . '/oauth2/token', [
                'body' => [
                    'client_id' => $this->clientId,
                    'client_secret' => $this->clientSecret,
                    'grant_type' => 'refresh_token',
                    'refresh_token' => $refreshToken,
                    'redirect_uri' => $this->redirectUri,
                ],
            ]);
            return $response->toArray();
        } catch (ClientExceptionInterface | ServerExceptionInterface | RedirectionExceptionInterface | TransportExceptionInterface $e) {
            throw new DiscordApiException($e->getCode(), 'Erreur lors de la requête à l\'API Discord: ' . $e->getMessage(), $e);
        }
    }

    public function getUserToken(SessionInterface $session, EntityManagerInterface $entityManager): ?User
    {
        // Vérifier si une session est en cours
        if (!$session->has('user_id')) throw new DiscordApiException(Response::HTTP_UNAUTHORIZED, 'Non authentifié');
    
        $user = $entityManager->getRepository(User::class)->find($session->get('user_id'));
        if (!$user) throw new DiscordApiException(Response::HTTP_NOT_FOUND, 'Utilisateur non trouvé');
    
        // Vérifier si l'utilisateur a un token d'accès et qu'il n'est pas expiré
        if (!$user->getAccessToken() || $user->getTokenExpiresAt() < new DateTime()) {
            if ($user->getRefreshToken()) {
                // Rafraîchir le token d'accès
                $tokenData = $this->refreshToken($user->getRefreshToken());
    
                $user->setAccessToken($tokenData['access_token']);
                $user->setRefreshToken($tokenData['refresh_token']);
                $user->setTokenExpiresAt((new DateTime())->add(new DateInterval('PT' . $tokenData['expires_in'] . 'S')));
            } throw new DiscordApiException(Response::HTTP_UNAUTHORIZED, "Token d'accès expiré et/ou token de refresh invalide");
        }
        return $user;
    }

    public function getBotsData(): array
    {
        $output = array();
        $botsId = [$_ENV['DISCORD_BOT_TAMISEUR_ID'], $_ENV['DISCORD_BOT_GROOVE_ID'], $_ENV['DISCORD_BOT_FUNKY_ID'], $_ENV['DISCORD_BOT_JUJUL_ID'], $_ENV['DISCORD_BOT_CHANTIER_ID']];

        foreach($botsId as $botId)
        {
            try {
                $response = $this->client->request('GET', $this->baseUrl . '/users/' . $botId, [
                    'headers' => [
                        'Authorization' => 'Bot ' . $this->clientToken,
                    ],
                ]);
                array_push($output, $response->toArray());
            } catch (ClientExceptionInterface | ServerExceptionInterface | RedirectionExceptionInterface | TransportExceptionInterface $e) {
                throw new DiscordApiException($e->getCode(), 'Erreur lors de la requête à l\'API Discord: ' . $e->getMessage(), $e);
            }
        }
        return $output;
        /*
        try {
            $response = $this->client->request('GET', $this->baseUrl . '/users/' . '223831938346123275', [
                'headers' => [
                    //'Authorization' => 'Bearer ' . $accessToken,
                    'Authorization' => 'Bot ' . $this->clientToken,
                ],
            ]);
            return $response->toArray();
        } catch (ClientExceptionInterface | ServerExceptionInterface | RedirectionExceptionInterface | TransportExceptionInterface $e) {
            throw new DiscordApiException($e->getCode(), 'Erreur lors de la requête à l\'API Discord: ' . $e->getMessage(), $e);
        }
        */
    }

    public function getCurrentUserData(string $accessToken): array
    {
        try {
            $response = $this->client->request('GET', $this->baseUrl . '/users/@me', [
                'headers' => [
                    'Authorization' => 'Bearer ' . $accessToken,
                ],
            ]);
            return $response->toArray();
        } catch (ClientExceptionInterface | ServerExceptionInterface | RedirectionExceptionInterface | TransportExceptionInterface $e) {
            throw new DiscordApiException($e->getCode(), 'Erreur lors de la requête à l\'API Discord: ' . $e->getMessage(), $e);
        }
    }

    public function getCurrentUserGuildsData(string $accessToken): array
    {
        try {
            $response = $this->client->request('GET', $this->baseUrl . '/users/@me/guilds', [
                'headers' => [
                    'Authorization' => 'Bearer ' . $accessToken,
                ],
            ]);
            return $response->toArray();
        } catch (ClientExceptionInterface | ServerExceptionInterface | RedirectionExceptionInterface | TransportExceptionInterface $e) {
            throw new DiscordApiException($e->getCode(), 'Erreur lors de la requête à l\'API Discord: ' . $e->getMessage(), $e);
        }
    }
    
    public function getUserData(string $userId): array
    {
        try {
            $response = $this->client->request('GET', $this->baseUrl . '/users/' . $userId, [
                'headers' => [
                    'Authorization' => 'Bot ' . $this->clientToken,
                ],
            ]);
            return $response->toArray();
        } catch (ClientExceptionInterface | ServerExceptionInterface | RedirectionExceptionInterface | TransportExceptionInterface $e) {
            throw new DiscordApiException($e->getCode(), 'Erreur lors de la requête à l\'API Discord: ' . $e->getMessage(), $e);
        }
    }

    public function getGuildData(string $guildId, string $accessToken): array
    {
        try {
            $response = $this->client->request('GET', $this->baseUrl . '/guilds/' . $guildId, [
                'headers' => [
                    'Authorization' => 'Bearer ' . $accessToken,
                ],
            ]);
            return $response->toArray();
        } catch (ClientExceptionInterface | ServerExceptionInterface | RedirectionExceptionInterface | TransportExceptionInterface $e) {
            throw new DiscordApiException($e->getCode(), 'Erreur lors de la requête à l\'API Discord: ' . $e->getMessage(), $e);
        }
    }
}