<?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/UpdateService/UpdateManager.php';

use Deploymentcenter\Core\Db;
use Deploymentcenter\Modules\UpdateService\UpdateManager;

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);

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

    $updateMgr = new UpdateManager($pdo);

    // Read JSON body for POST requests if available
    $inputData = [];
    if ($method === 'POST') {
        $raw = file_get_contents('php://input');
        if (!empty($raw)) {
            $inputData = json_decode($raw, true) ?? [];
        }
    }

    $action = $_REQUEST['action'] ?? $inputData['action'] ?? '';

    // Action: Publish Release (from Packager CLI)
    if ($action === 'publish_release' && $method === 'POST') {
        $product   = $inputData['product_slug'] ?? $_POST['product_slug'] ?? '';
        $version   = $inputData['version'] ?? $_POST['version'] ?? '';
        $channel   = $inputData['channel'] ?? $_POST['channel'] ?? 'prod';
        $url       = $inputData['download_url'] ?? $_POST['download_url'] ?? '';
        $hash      = $inputData['sha256_hash'] ?? $_POST['sha256_hash'] ?? null;
        $gitCommit = $inputData['git_commit'] ?? $_POST['git_commit'] ?? null;
        $sizeBytes = (int)($inputData['size_bytes'] ?? $_POST['size_bytes'] ?? 0);
        $notes     = $inputData['release_notes'] ?? $_POST['release_notes'] ?? null;
        $isCritical= !empty($inputData['is_critical']) || !empty($_POST['is_critical']);

        if (empty($product) || empty($version) || empty($url)) {
            sendResponse(['error' => 'Bad Request', 'message' => 'Missing required fields: product_slug, version, download_url'], 400);
        }

        $ok = $updateMgr->addRelease($product, $version, $channel, $notes, $url, $hash, $gitCommit, $sizeBytes, null, $isCritical);
        if ($ok) {
            sendResponse(['status' => 'success', 'message' => "Release v{$version} published for {$product} ({$channel})."]);
        } else {
            sendResponse(['error' => 'Database Error', 'message' => 'Failed to store release.'], 500);
        }
    }

    if (str_ends_with($uri, '/check') && ($method === 'GET' || $method === 'POST')) {
        $product = $_REQUEST['product'] ?? $_REQUEST['product_slug'] ?? '';
        $version = $_REQUEST['version'] ?? $_REQUEST['current_version'] ?? '0.0.0';
        $channel = $_REQUEST['channel'] ?? 'prod';

        if (empty($product)) {
            sendResponse(['error' => 'Bad Request', 'message' => 'Parameter "product" is required.'], 400);
        }

        $latest = $updateMgr->checkUpdate($product, $version, $channel);
        if ($latest) {
            sendResponse([
                'update_available' => true,
                'latest_release'   => $latest
            ]);
        } else {
            sendResponse([
                'update_available' => false,
                'message'          => 'Application is up to date.'
            ]);
        }
    }

    if (str_ends_with($uri, '/releases') && $method === 'GET') {
        $product = $_GET['product'] ?? null;
        $channel = $_GET['channel'] ?? null;
        $releases = $updateMgr->getReleases($product, $channel);
        sendResponse(['count' => count($releases), 'releases' => $releases]);
    }

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

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