<?php
session_start();

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    header('Location: process_dashboard.php');
    exit;
}

require_once 'WorkflowEngine.php';

if (!isset($_POST['instanceId']) || !isset($_POST['transitionId'])) {
    $_SESSION['flash_message'] = ['type' => 'danger', 'message' => 'Błąd: Brak wymaganych parametrów.'];
    header('Location: process_dashboard.php');
    exit;
}

$instanceId = (int)$_POST['instanceId'];
$transitionId = $_POST['transitionId'];
$userId = $_SESSION['user_id'] ?? null;
$payload = $_POST['payload'] ?? null;

if (!$userId) {
    $_SESSION['flash_message'] = ['type' => 'danger', 'message' => 'Błąd: Sesja wygasła.'];
    header('Location: login.php');
    exit;
}

try {
    $engine = new WorkflowEngine();
    $success = $engine->applyTransition($instanceId, $transitionId, $payload, $userId);

    if ($success) {
        $_SESSION['flash_message'] = ['type' => 'success', 'message' => 'Akcja została wykonana pomyślnie.'];
    } else {
        $_SESSION['flash_message'] = ['type' => 'danger', 'message' => 'Błąd: Nie udało się wykonać akcji.'];
    }
} catch (Exception $e) {
    error_log("Error applying transition: " . $e->getMessage());
    $_SESSION['flash_message'] = ['type' => 'danger', 'message' => 'Wystąpił krytyczny błąd: ' . $e->getMessage()];
}

header('Location: process_dashboard.php');
exit;