<?php

class Chat
{
    public function index()
    {

        if (!isset($_SESSION['user_id'])) {
            header("Location: /projekte/htdocs/login.php");
            exit;
        }

        $currentUserId = $_SESSION['user_id'];

        $chatModel = Factory::createChatModel();
        $userModel = Factory::createBenutzerModel();

        $allUsers = $userModel->getAllUsersExcept($currentUserId);
        $currentUser = $userModel->getUserById( $currentUserId);
        $unreadCounts = $chatModel->getUnreadCounts($currentUserId);


        // Unread in Kontakte einfügen
        foreach ($allUsers as &$user) {
            $user['unread'] = $unreadCounts[$user['id']] ?? 0;
        }

        // View laden
        require __DIR__ . "/../view/chat/index.php";
    }

    // Nachrichten zwischen zwei Usern per AJAX laden
    public function loadMessages()
    {
        
        if (!isset($_SESSION['user_id'])) exit;

        $current = $_SESSION['user_id'];
        $other = (int)$_POST['user_id'];

        $chatModel = new ChatModel();
        $messages = $chatModel->getMessagesBetweenUsers($current, $other);

        // Direkt lesen markieren
        $chatModel->markAsRead($other, $current);

        header('Content-Type: application/json');
        echo json_encode($messages);
    }
}