<?php
require_once 'models/TicketModel.php';
require_once 'models/UserPreferencesModel.php';
require_once 'models/StatsModel.php';

class DashboardController {
    private $ticketModel;
    private $prefsModel;
    private $statsModel;
    private $conn;

    public function __construct($conn) {
        $this->conn = $conn;
        $this->ticketModel = new TicketModel($conn);
        $this->prefsModel = new UserPreferencesModel($conn);
        $this->statsModel = new StatsModel($conn);
    }
    
    public function index() {
        // Get user ID for preferences
        $userId = isset($_SESSION['user']['user_id']) ? $_SESSION['user']['user_id'] : null;

        // Get query parameters
        $page = isset($_GET['page']) ? (int)$_GET['page'] : 1;

        // Get rows per page from user preferences, fallback to cookie, then default
        $limit = 15;
        if ($userId) {
            $limit = (int)$this->prefsModel->getPreference($userId, 'rows_per_page', 15);
        } else if (isset($_COOKIE['ticketsPerPage'])) {
            $limit = (int)$_COOKIE['ticketsPerPage'];
        }

        $sortColumn = isset($_GET['sort']) ? $_GET['sort'] : 'ticket_id';
        $sortDirection = isset($_GET['dir']) ? $_GET['dir'] : 'desc';
        $category = isset($_GET['category']) ? $_GET['category'] : null;
        $type = isset($_GET['type']) ? $_GET['type'] : null;
        $search = isset($_GET['search']) ? trim($_GET['search']) : null;

        // Handle status filtering with user preferences
        $status = null;
        if (isset($_GET['status']) && !empty($_GET['status'])) {
            $status = $_GET['status'];
        } else if (!isset($_GET['show_all'])) {
            // Get default status filters from user preferences
            if ($userId) {
                $status = $this->prefsModel->getPreference($userId, 'default_status_filters', 'Open,Pending,In Progress');
            } else {
                // Default: show Open, Pending, and In Progress (exclude Closed)
                $status = 'Open,Pending,In Progress';
            }
        }
        // If $_GET['show_all'] exists or no status param with show_all, show all tickets (status = null)

        // Build advanced search filters array
        $filters = [];
        if (isset($_GET['created_from'])) $filters['created_from'] = $_GET['created_from'];
        if (isset($_GET['created_to'])) $filters['created_to'] = $_GET['created_to'];
        if (isset($_GET['updated_from'])) $filters['updated_from'] = $_GET['updated_from'];
        if (isset($_GET['updated_to'])) $filters['updated_to'] = $_GET['updated_to'];
        if (isset($_GET['priority_min'])) $filters['priority_min'] = $_GET['priority_min'];
        if (isset($_GET['priority_max'])) $filters['priority_max'] = $_GET['priority_max'];
        if (isset($_GET['created_by'])) $filters['created_by'] = $_GET['created_by'];
        if (isset($_GET['assigned_to'])) $filters['assigned_to'] = $_GET['assigned_to'];

        // Get tickets with pagination, sorting, search, and advanced filters
        $result = $this->ticketModel->getAllTickets($page, $limit, $status, $sortColumn, $sortDirection, $category, $type, $search, $filters);
        
        // Get categories and types for filters
        $categories = $this->getCategories();
        $types = $this->getTypes();
        
        // Extract data for the view
        $tickets = $result['tickets'];
        $totalTickets = $result['total'];
        $totalPages = $result['pages'];

        // Load dashboard statistics
        $stats = $this->statsModel->getAllStats();

        // Load the dashboard view
        include 'views/DashboardView.php';
    }

    private function getCategories() {
        $sql = "SELECT DISTINCT category FROM tickets WHERE category IS NOT NULL ORDER BY category";
        $stmt = $this->conn->prepare($sql);
        $stmt->execute();
        $result = $stmt->get_result();
        $categories = [];
        while ($row = $result->fetch_assoc()) {
            $categories[] = $row['category'];
        }
        $stmt->close();
        return $categories;
    }

    private function getTypes() {
        $sql = "SELECT DISTINCT type FROM tickets WHERE type IS NOT NULL ORDER BY type";
        $stmt = $this->conn->prepare($sql);
        $stmt->execute();
        $result = $stmt->get_result();
        $types = [];
        while ($row = $result->fetch_assoc()) {
            $types[] = $row['type'];
        }
        $stmt->close();
        return $types;
    }
}
?>