<?php

// Use absolute paths for model includes
require_once dirname(__DIR__) . '/models/TicketModel.php';
require_once dirname(__DIR__) . '/models/CommentModel.php';
require_once dirname(__DIR__) . '/models/AuditLogModel.php';
require_once dirname(__DIR__) . '/models/UserModel.php';
require_once dirname(__DIR__) . '/models/WorkflowModel.php';
require_once dirname(__DIR__) . '/models/TemplateModel.php';
require_once dirname(__DIR__) . '/models/CustomFieldModel.php';
require_once dirname(__DIR__) . '/helpers/UrlHelper.php';
require_once dirname(__DIR__) . '/helpers/NotificationHelper.php';

class TicketController
{
    private $ticketModel;
    private $commentModel;
    private $auditLogModel;
    private $userModel;
    private $workflowModel;
    private $templateModel;
    private $customFieldModel;
    private $conn;

    public function __construct($conn)
    {
        $this->conn = $conn;
        $this->ticketModel = new TicketModel($conn);
        $this->commentModel = new CommentModel($conn);
        $this->auditLogModel = new AuditLogModel($conn);
        $this->userModel = new UserModel($conn);
        $this->workflowModel = new WorkflowModel($conn);
        $this->templateModel = new TemplateModel($conn);
        $this->customFieldModel = new CustomFieldModel($conn);
    }

    public function view($id)
    {
        // Get current user
        $currentUser = $GLOBALS['currentUser'] ?? null;
        $userId = $currentUser['user_id'] ?? null;

        // Get ticket data
        $ticket = $this->ticketModel->getTicketById($id);

        if (!$ticket || !$this->ticketModel->canUserAccessTicket($ticket, $currentUser)) {
            http_response_code(404);
            include dirname(__DIR__) . '/views/error_404.php';
            return;
        }

        // Load first page of comments; show "load more" if ticket has many
        $commentPageSize  = 50;
        $totalComments    = $this->commentModel->getCommentCount((int)$id);
        $comments         = $this->commentModel->getCommentsByTicketId($id, true, $commentPageSize, 0);

        // Get timeline for this ticket
        $timeline = $this->auditLogModel->getTicketTimeline($id);

        // Get all users for assignment dropdown
        $allUsers = $this->userModel->getAllUsers();

        // Get allowed status transitions for this ticket
        $allowedTransitions = $this->workflowModel->getAllowedTransitions($ticket['status']);

        // Custom fields applicable to this ticket's category, with any
        // already-saved values for it
        $customFieldDefs = $this->customFieldModel->getAllDefinitions($ticket['category'], true);
        $customFieldValues = $this->customFieldModel->getValuesForTicket($id);

        // Make $conn available to view for visibility groups
        $conn = $this->conn;

        // Load the view
        include dirname(__DIR__) . '/views/TicketView.php';
    }

    public function create()
    {
        // Get current user
        $currentUser = $GLOBALS['currentUser'] ?? null;
        $userId = $currentUser['user_id'] ?? null;

        // All active custom field definitions (every category, plus
        // category-less ones) — the create form renders them all and toggles
        // visibility client-side as the Category select changes, since the
        // ticket doesn't exist yet to scope the query to one category.
        $allCustomFieldDefs = $this->customFieldModel->getAllDefinitions(null, true);

        // Check if form was submitted
        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
            // Validate CSRF token
            require_once dirname(__DIR__) . '/middleware/CsrfMiddleware.php';
            $csrfToken = $_POST['csrf_token'] ?? '';
            if (!CsrfMiddleware::validateToken($csrfToken)) {
                $error = "Invalid or expired security token. Please try again.";
                $templates = $this->templateModel->getAllTemplates();
                $allUsers = $this->userModel->getAllUsers();
                $conn = $this->conn;
                include dirname(__DIR__) . '/views/CreateTicketView.php';
                return;
            }

            // Validation (incl. required custom fields), creation, audit log,
            // stats cache, custom field values, duplicate link and notification
            // live in TicketCreationService so the MCP create_ticket tool runs
            // the same code path.
            require_once dirname(__DIR__) . '/services/TicketCreationService.php';
            $result = TicketCreationService::create($this->conn, $currentUser ?? [], [
                'title' => $_POST['title'] ?? '',
                'description' => $_POST['description'] ?? '',
                'priority' => $_POST['priority'] ?? '4',
                'category' => $_POST['category'] ?? 'General',
                'type' => $_POST['type'] ?? 'Issue',
                'status' => $_POST['status'] ?? 'Open',
                'visibility' => $_POST['visibility'] ?? 'public',
                'visibility_groups' => (isset($_POST['visibility_groups']) && is_array($_POST['visibility_groups']))
                    ? $_POST['visibility_groups'] : null,
                'assigned_to' => $_POST['assigned_to'] ?? null,
                'custom_fields' => $_POST['custom_fields'] ?? [],
                'link_duplicate_of' => $_POST['link_duplicate_of'] ?? '',
            ]);

            if ($result['success']) {
                // Redirect to the new ticket
                header("Location: " . $GLOBALS['config']['BASE_URL'] . "/ticket/" . $result['ticket_id']);
                exit;
            } else {
                $error = $result['error'];
                $templates = $this->templateModel->getAllTemplates();
                $allUsers = $this->userModel->getAllUsers();
                $conn = $this->conn; // Make $conn available to view
                include dirname(__DIR__) . '/views/CreateTicketView.php';
                return;
            }
        } else {
            // Get all templates for the template selector
            $templates = $this->templateModel->getAllTemplates();
            // Get all users for assignment dropdown
            $allUsers = $this->userModel->getAllUsers();
            $conn = $this->conn; // Make $conn available to view

            // Display the create ticket form
            include dirname(__DIR__) . '/views/CreateTicketView.php';
        }
    }
}