// /public/js/auth.js (для приложения bc.js)
export function initAuth(dependencies) {
    console.log('[Auth.js] initAuth called for BattleClub.');

    const { socket, clientState, ui } = dependencies;
    const { loginForm, registerForm, logoutButton } = ui.elements;

    const APP_BASE_PATH = '/battleclub'; // Определяем базовый путь для этого приложения
    const JWT_TOKEN_KEY = 'jwtToken';

    // Функция для формирования полного URL API с учетом базового пути
    const getApiUrl = (apiPath) => `${window.location.origin}${APP_BASE_PATH}${apiPath}`;

    async function handleAuthResponse(response, formType) {
        console.log(`[Auth.js handleAuthResponse] Form: ${formType}, Status: ${response.status}`);
        const regButton = registerForm ? registerForm.querySelector('button') : null;
        const loginButton = loginForm ? loginForm.querySelector('button') : null;

        try {
            const data = await response.json();
            console.log(`[Auth.js handleAuthResponse] Parsed data:`, data);

            if (response.ok && data.success && data.token) {
                localStorage.setItem(JWT_TOKEN_KEY, data.token);
                clientState.isLoggedIn = true;
                clientState.loggedInUsername = data.username;
                clientState.myUserId = data.userId;
                console.log('[Auth.js handleAuthResponse] Auth successful. Client state updated:', JSON.parse(JSON.stringify(clientState)));
                
                ui.setAuthMessage('');
                ui.showGameSelectionScreen(data.username);

                console.log('[Auth.js handleAuthResponse] Reconnecting socket with new token.');
                if (socket.connected) {
                    socket.disconnect();
                }
                // Socket.IO клиент (в main.js) уже должен быть настроен с правильным path: '/battleclub/socket.io'
                socket.auth = { token: data.token };
                socket.connect();

            } else {
                console.warn(`[Auth.js handleAuthResponse] Auth failed or token missing. Message: ${data.message}`);
                clientState.isLoggedIn = false; clientState.loggedInUsername = ''; clientState.myUserId = null;
                localStorage.removeItem(JWT_TOKEN_KEY);
                ui.setAuthMessage(data.message || 'Ошибка сервера.', true);
            }
        } catch (error) {
            console.error(`[Auth.js handleAuthResponse] Error processing response:`, error);
            clientState.isLoggedIn = false; clientState.loggedInUsername = ''; clientState.myUserId = null;
            localStorage.removeItem(JWT_TOKEN_KEY);
            ui.setAuthMessage('Произошла ошибка сети или ответа сервера.', true);
        } finally {
            if (regButton) regButton.disabled = false;
            if (loginButton) loginButton.disabled = false;
        }
    }

    if (registerForm) {
        registerForm.addEventListener('submit', async (e) => {
            e.preventDefault();
            const username = document.getElementById('register-username').value;
            const password = document.getElementById('register-password').value;
            console.log(`[Auth.js] Registering: "${username}"`);
            if (registerForm.querySelector('button')) registerForm.querySelector('button').disabled = true;
            if (loginForm && loginForm.querySelector('button')) loginForm.querySelector('button').disabled = true;
            ui.setAuthMessage('Регистрация...');
            try {
                const response = await fetch(getApiUrl('/auth/register'), { // Используем getApiUrl
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json' },
                    body: JSON.stringify({ username, password }),
                });
                await handleAuthResponse(response, 'register');
                if (response.ok && clientState.isLoggedIn) registerForm.reset();
            } catch (error) {
                console.error('[Auth.js] Network error during registration:', error);
                ui.setAuthMessage('Ошибка сети при регистрации.', true);
                if (registerForm.querySelector('button')) registerForm.querySelector('button').disabled = false;
                if (loginForm && loginForm.querySelector('button')) loginForm.querySelector('button').disabled = false;
            }
        });
    }

    if (loginForm) {
        loginForm.addEventListener('submit', async (e) => {
            e.preventDefault();
            const username = document.getElementById('login-username').value;
            const password = document.getElementById('login-password').value;
            console.log(`[Auth.js] Logging in: "${username}"`);
            if (loginForm.querySelector('button')) loginForm.querySelector('button').disabled = true;
            if (registerForm && registerForm.querySelector('button')) registerForm.querySelector('button').disabled = true;
            ui.setAuthMessage('Вход...');
            try {
                const response = await fetch(getApiUrl('/auth/login'), { // Используем getApiUrl
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json' },
                    body: JSON.stringify({ username, password }),
                });
                await handleAuthResponse(response, 'login');
            } catch (error) {
                console.error('[Auth.js] Network error during login:', error);
                ui.setAuthMessage('Ошибка сети при входе.', true);
                if (loginForm.querySelector('button')) loginForm.querySelector('button').disabled = false;
                if (registerForm && registerForm.querySelector('button')) registerForm.querySelector('button').disabled = false;
            }
        });
    }

    if (logoutButton) {
        logoutButton.addEventListener('click', () => {
            // ... (ваш существующий код для logout, он не зависит от API URL) ...
            console.log('[Auth.js] Logout button clicked.');
            logoutButton.disabled = true;
            if (clientState.isLoggedIn && clientState.isInGame && clientState.currentGameId /* ... доп. проверки ... */) {
                // ... логика playerSurrender / leaveAiGame ...
            }
            localStorage.removeItem(JWT_TOKEN_KEY);
            clientState.isLoggedIn = false; clientState.loggedInUsername = ''; clientState.myUserId = null;
            ui.showAuthScreen();
            ui.setAuthMessage("Вы успешно вышли из системы.");
            if (socket.connected) socket.disconnect();
            socket.auth = { token: null };
            socket.connect();
        });
    }
    console.log('[Auth.js] initAuth for BattleClub finished.');
}