<?php

declare(strict_types=1);

header('Content-Type: application/json; charset=utf-8');

require_once __DIR__ . '/../../../../src/Core/Db.php';
require_once __DIR__ . '/../../../../src/Modules/License/Audit.php';
require_once __DIR__ . '/../../../../src/Modules/License/KeyGen.php';
require_once __DIR__ . '/../../../../src/Modules/License/RateLimiter.php';
require_once __DIR__ . '/../../../../src/Modules/License/LicenseService.php';

use Deploymentcenter\Core\Db;
use Deploymentcenter\Modules\License\LicenseService;
use Deploymentcenter\Modules\License\RateLimiter;

function sendResponse(array $data, int $statusCode = 200): void {
    http_response_code($statusCode);
    echo json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
    exit;
}

try {
    $config = require __DIR__ . '/../../../../config/config.php';
    $pdo = Db::init($config);

    $limiter = new RateLimiter($pdo, 120, 60);
    $ip = $_SERVER['REMOTE_ADDR'] ?? '127.0.0.1';
    if (!$limiter->check($ip)) {
        sendResponse(['error' => 'Too Many Requests', 'message' => 'Rate limit exceeded.'], 429);
    }

    $uri = parse_url($_SERVER['REQUEST_URI'] ?? '/', PHP_URL_PATH);
    $method = strtoupper($_SERVER['REQUEST_METHOD'] ?? 'GET');

    $rawInput = file_get_contents('php://input');
    $inputData = !empty($rawInput) ? (json_decode($rawInput, true) ?? []) : $_POST;

    $licenseService = new LicenseService($pdo);

    if (str_ends_with($uri, '/validate') && $method === 'POST') {
        $res = $licenseService->validate($inputData, $ip);
        sendResponse($res);
    }

    if (str_ends_with($uri, '/deactivate') && $method === 'POST') {
        $res = $licenseService->deactivate($inputData, $ip);
        sendResponse($res);
    }

    if (str_ends_with($uri, '/status') && $method === 'GET') {
        sendResponse(['status' => 'ok', 'module' => 'LicenseLabrador', 'version' => '1.0']);
    }

    sendResponse(['error' => 'Not Found', 'message' => 'Endpoint not found'], 404);

} catch (Throwable $t) {
    sendResponse(['error' => 'Server Error', 'message' => $t->getMessage()], 500);
}