<?php

class Chat {

    public function index() {
        if (!isset($_SESSION['user_id'])) {
            header("Location: " . PROJEKT_URL . "/Login");
            exit;
        }

        $userModel = Factory::createBenutzerModel();
        $currentUser = $userModel->getUserById($_SESSION['user_id']);
        $allUsers = $userModel->getAllUsers();

        $selectedUser = null;
        $messages = [];

        // Prüfen, ob ein Kontakt ausgewählt wurde
        if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['contact_id'])) {
            $contactId = (int)$_POST['contact_id'];
            $selectedUser = $userModel->getUserById($contactId);

            $chatModel = Factory::createChatModel();
            $messages = $chatModel->getMessagesBetweenUsers($currentUser['id'], $selectedUser['id']);
        }

        // Prüfen, ob eine Nachricht gesendet wird
        if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['message']) && isset($_POST['receiver_id'])) {
            $chatModel = Factory::createChatModel();
            $chatModel->senderID = $currentUser['id'];
            $chatModel->empfaengerID = (int)$_POST['receiver_id'];
            $chatModel->nachricht = trim($_POST['message']);
            $chatModel->insert();

            // Nachricht nach dem Senden erneut laden
            $selectedUser = $userModel->getUserById($_POST['receiver_id']);
            $messages = $chatModel->getMessagesBetweenUsers($currentUser['id'], $selectedUser['id']);
        }

        require_once(PROJEKT_VIEW_DIR . "/chat/index.php");
    }

}