<?php

namespace Controllers;

use Libs\ResponseLib;
use Models\CprModel;
use Models\PaymentModel;
use Psr\Http\Message\ServerRequestInterface;
use Services\B3CprService;

class PaymentConfirmController
{
    private PaymentModel $paymentModel;
    private CprModel $cprModel;
    private B3CprService $b3Service;

    public function __construct()
    {
        $this->paymentModel = new PaymentModel();
        $this->cprModel = new CprModel();
        $this->b3Service = new B3CprService();
    }

    public function __invoke(ServerRequestInterface $request)
    {
        $body = json_decode((string)$request->getBody(), true) ?? [];
        $paymentId = isset($body['payment_id']) ? (int)$body['payment_id'] : 0;

        if ($paymentId <= 0) {
            return ResponseLib::sendFail('payment_id inválido', [], 'E_VALIDATE')->withStatus(400);
        }

        $payment = $this->paymentModel->findById($paymentId);
        if (!$payment) {
            return ResponseLib::sendFail('Pagamento não encontrado', [], 'E_NOT_FOUND')->withStatus(404);
        }

        $statusId = (int)($payment['status_id'] ?? 0);
        if ($statusId === 0) {
            return ResponseLib::sendFail('Pagamento ainda não confirmado', ['payment_id' => $paymentId], 'E_PAYMENT_PENDING')->withStatus(409);
        }

        if ($statusId !== 1) {
            return ResponseLib::sendFail('Pagamento em status inválido', ['status_id' => $statusId], 'E_PAYMENT_STATUS')->withStatus(409);
        }

        $cpr = $this->cprModel->findByPaymentId($paymentId);
        if (!$cpr) {
            return ResponseLib::sendFail('Nenhuma CPR vinculada ao pagamento', [], 'E_CPR_NOT_FOUND')->withStatus(404);
        }

        try {
            $payload = $this->b3Service->mapToB3($cpr);
            $token = $this->resolveB3Token($request, $body);
            $result = $this->b3Service->postCpr($token, $payload);
        } catch (\Throwable $e) {
            return ResponseLib::sendFail('Falha ao enviar CPR à B3: ' . $e->getMessage(), [], 'E_EXTERNAL')->withStatus(502);
        }

        if (isset($result['error'])) {
            return ResponseLib::sendFail('cURL error during B3 CPR request', ['error' => $result['error']], 'E_EXTERNAL')->withStatus(502);
        }

        return ResponseLib::sendOk([
            'message' => 'CPR gerada com sucesso',
            'payment_id' => $paymentId,
            'b3_response' => $result['json'] ?? ($result['raw'] ?? null),
        ], 'S_CPR_SENT');
    }

    private function resolveB3Token(ServerRequestInterface $request, array $body): string
    {
        $token = $body['b3_access_token'] ?? ($body['access_token'] ?? null);
        if (!$token) {
            $b3Auth = $request->getHeaderLine('X-B3-Authorization') ?: '';
            if (stripos($b3Auth, 'Bearer ') === 0) {
                $token = trim(substr($b3Auth, 7));
            }
        }

        if (!$token) {
            $token = $request->getHeaderLine('X-B3-Access-Token') ?: null;
        }

        if (!$token) {
            $token = $this->b3Service->getAccessToken();
        }

        return $token;
    }
}