// Game State
let wasmReady = false;
let gameStarted = false;
let audioMuted = false;

// Initialize WASM
async function initWASM() {
    const go = new Go();

    try {
        const result = await WebAssembly.instantiateStreaming(fetch("main.wasm"), go.importObject);
        go.run(result.instance);
        wasmReady = true;

        // Hide loading screen
        document.getElementById('loading').style.display = 'none';

        console.log('✅ WASM loaded successfully');

        // Load initial leaderboard
        setTimeout(() => {
            if (window.requestLeaderboard) {
                window.requestLeaderboard();
            }
        }, 500);
    } catch (err) {
        console.error('❌ Failed to load WASM:', err);
        document.getElementById('loading').innerHTML = '<div class="spinner"></div><p>Fehler beim Laden: ' + err.message + '</p>';
    }
}

// Menu Navigation
function showMainMenu() {
    hideAllScreens();
    document.getElementById('menu').classList.remove('hidden');
}

function showCoopMenu() {
    hideAllScreens();
    document.getElementById('coopMenu').classList.remove('hidden');
}

function showSettings() {
    hideAllScreens();
    document.getElementById('settingsMenu').classList.remove('hidden');
}

function showLeaderboard() {
    hideAllScreens();
    document.getElementById('leaderboardMenu').classList.remove('hidden');
    loadLeaderboard();
}

function hideAllScreens() {
    document.querySelectorAll('.overlay-screen').forEach(screen => {
        screen.classList.add('hidden');
    });
}

function hideMenu() {
    document.getElementById('menu').style.display = 'none';
    // Canvas sichtbar machen für Gameplay
    const canvas = document.querySelector('canvas');
    if (canvas) {
        canvas.classList.add('game-active');
    }
}

function showMenu() {
    document.getElementById('menu').style.display = 'flex';
    document.getElementById('menu').classList.remove('hidden');
    showMainMenu();
    // Canvas verstecken im Menü
    const canvas = document.querySelector('canvas');
    if (canvas) {
        canvas.classList.remove('game-active');
    }
}

// Game Functions
function startSoloGame() {
    if (!wasmReady) {
        alert('Spiel wird noch geladen...');
        return;
    }

    const playerName = document.getElementById('playerName').value || 'ANON';

    // Store in localStorage for WASM to read
    localStorage.setItem('escape_player_name', playerName);
    localStorage.setItem('escape_game_mode', 'solo');
    localStorage.setItem('escape_room_id', '');

    // Hide ALL screens including main menu
    hideAllScreens();
    document.getElementById('menu').style.display = 'none';
    gameStarted = true;

    // Canvas sichtbar machen
    const canvas = document.querySelector('canvas');
    if (canvas) {
        canvas.classList.add('game-active');
    }

    // Trigger WASM game start
    if (window.startGame) {
        window.startGame('solo', playerName, '');
    }

    console.log('🎮 Solo game started:', playerName);
}

function createRoom() {
    if (!wasmReady) {
        alert('Spiel wird noch geladen...');
        return;
    }

    const playerName = document.getElementById('playerName').value || 'ANON';
    const roomID = 'R' + Math.random().toString(36).substr(2, 5).toUpperCase();
    const teamName = 'TEAM';

    // Store in localStorage
    localStorage.setItem('escape_player_name', playerName);
    localStorage.setItem('escape_game_mode', 'coop');
    localStorage.setItem('escape_room_id', roomID);
    localStorage.setItem('escape_team_name', teamName);
    localStorage.setItem('escape_is_host', 'true');

    // Verstecke ALLE Screens inkl. Hauptmenü
    hideAllScreens();
    document.getElementById('menu').style.display = 'none';

    // Zeige HTML Lobby Screen
    document.getElementById('lobbyScreen').classList.remove('hidden');
    document.getElementById('lobbyRoomCode').textContent = roomID;
    document.getElementById('lobbyHostControls').classList.remove('hidden');
    document.getElementById('lobbyStatus').textContent = 'Du bist Host - starte wenn bereit!';

    // Trigger WASM game start (im Hintergrund)
    if (window.startGame) {
        window.startGame('coop', playerName, roomID, teamName, true);
    }

    console.log('🎮 Room created:', roomID);
}

function joinRoom() {
    if (!wasmReady) {
        alert('Spiel wird noch geladen...');
        return;
    }

    const playerName = document.getElementById('playerName').value || 'ANON';
    const roomID = document.getElementById('joinRoomCode').value.toUpperCase();
    const teamName = document.getElementById('teamNameJoin').value || 'TEAM';

    if (!roomID || roomID.length < 4) {
        alert('Bitte gib einen gültigen Raum-Code ein!');
        return;
    }

    // Store in localStorage
    localStorage.setItem('escape_player_name', playerName);
    localStorage.setItem('escape_game_mode', 'coop');
    localStorage.setItem('escape_room_id', roomID);
    localStorage.setItem('escape_team_name', teamName);
    localStorage.setItem('escape_is_host', 'false');

    // Verstecke ALLE Screens inkl. Hauptmenü
    hideAllScreens();
    document.getElementById('menu').style.display = 'none';

    // Zeige HTML Lobby Screen
    document.getElementById('lobbyScreen').classList.remove('hidden');
    document.getElementById('lobbyRoomCode').textContent = roomID;
    document.getElementById('lobbyHostControls').classList.add('hidden');
    document.getElementById('lobbyStatus').textContent = 'Warte auf Host...';

    // Trigger WASM game start (im Hintergrund)
    if (window.startGame) {
        window.startGame('coop', playerName, roomID, teamName, false);
    }

    console.log('🎮 Joining room:', roomID);
}

// Lobby Functions
function startGameFromLobby() {
    // Host startet das Spiel
    hideAllScreens();
    document.getElementById('menu').style.display = 'none';
    gameStarted = true;

    // Canvas sichtbar machen
    const canvas = document.querySelector('canvas');
    if (canvas) {
        canvas.classList.add('game-active');
    }

    // Signal an WASM senden dass Spiel starten soll
    if (window.startGameFromLobby_WASM) {
        window.startGameFromLobby_WASM();
    }

    console.log('🎮 Host started game from lobby');
}

function leaveLobby() {
    location.reload();
}

// Update Lobby Player List (called by WASM)
function updateLobbyPlayers(players) {
    const list = document.getElementById('lobbyPlayerList');
    if (!players || players.length === 0) {
        list.innerHTML = '<div style="color: #888;">Warte auf Spieler...</div>';
        return;
    }

    list.innerHTML = players.map((player, index) => {
        const hostBadge = player.is_host ? ' <span style="color:#ffcc00;">[HOST]</span>' : '';
        return `<div style="padding:5px 0; color:#fff;">• ${player.name}${hostBadge}</div>`;
    }).join('');

    console.log('👥 Lobby players updated:', players.length);
}

function loadLeaderboard() {
    const list = document.getElementById('leaderboardList');
    list.innerHTML = '<div style="text-align:center; padding:20px;">Lädt Leaderboard...</div>';

    // Request leaderboard from WASM
    if (window.requestLeaderboard) {
        window.requestLeaderboard();
    }

    // Fallback timeout
    setTimeout(() => {
        if (list.innerHTML.includes('Lädt')) {
            list.innerHTML = '<div style="text-align:center; padding:20px; color:#888;">Keine Daten verfügbar</div>';
        }
    }, 3000);
}

// Called by WASM to update leaderboard
function updateLeaderboard(entries) {
    // Update ALL leaderboard displays
    const list = document.getElementById('leaderboardList');
    const startList = document.getElementById('startLeaderboardList');
    const gameOverList = document.getElementById('gameOverLeaderboardList');

    if (!entries || entries.length === 0) {
        const emptyMsg = '<div style="text-align:center; padding:20px; color:#888;">Noch keine Einträge</div>';
        if (list) list.innerHTML = emptyMsg;
        if (startList) startList.innerHTML = emptyMsg;
        if (gameOverList) gameOverList.innerHTML = emptyMsg;
        return;
    }

    const html = entries.slice(0, 10).map((entry, index) => {
        const medal = index === 0 ? '🥇' : index === 1 ? '🥈' : index === 2 ? '🥉' : `${index + 1}.`;
        return `
            <div class="leaderboard-item">
                <div class="leaderboard-rank">${medal}</div>
                <div class="leaderboard-name">${entry.player_name}</div>
                <div class="leaderboard-score">${entry.score}</div>
            </div>
        `;
    }).join('');

    if (list) list.innerHTML = html;
    if (startList) startList.innerHTML = html;
    if (gameOverList) gameOverList.innerHTML = html;

    console.log('📊 Leaderboard updated with', entries.length, 'entries');
}

// Audio Toggle
function toggleAudio() {
    audioMuted = !audioMuted;
    const btn = document.getElementById('mute-btn');

    if (audioMuted) {
        btn.textContent = '🔇';
        if (window.setMusicVolume) window.setMusicVolume(0);
        if (window.setSFXVolume) window.setSFXVolume(0);
    } else {
        btn.textContent = '🔊';
        const musicVol = parseInt(localStorage.getItem('escape_music_volume') || 70) / 100;
        const sfxVol = parseInt(localStorage.getItem('escape_sfx_volume') || 70) / 100;
        if (window.setMusicVolume) window.setMusicVolume(musicVol);
        if (window.setSFXVolume) window.setSFXVolume(sfxVol);
    }
}

// Settings Volume Sliders
document.addEventListener('DOMContentLoaded', () => {
    const musicSlider = document.getElementById('musicVolume');
    const sfxSlider = document.getElementById('sfxVolume');
    const musicValue = document.getElementById('musicValue');
    const sfxValue = document.getElementById('sfxValue');

    if (musicSlider) {
        musicSlider.addEventListener('input', (e) => {
            const value = e.target.value;
            musicValue.textContent = value + '%';
            localStorage.setItem('escape_music_volume', value);

            if (window.setMusicVolume && !audioMuted) {
                window.setMusicVolume(value / 100);
            }
        });

        // Load saved value
        const savedMusic = localStorage.getItem('escape_music_volume') || 70;
        musicSlider.value = savedMusic;
        musicValue.textContent = savedMusic + '%';
    }

    if (sfxSlider) {
        sfxSlider.addEventListener('input', (e) => {
            const value = e.target.value;
            sfxValue.textContent = value + '%';
            localStorage.setItem('escape_sfx_volume', value);

            if (window.setSFXVolume && !audioMuted) {
                window.setSFXVolume(value / 100);
            }
        });

        // Load saved value
        const savedSFX = localStorage.getItem('escape_sfx_volume') || 70;
        sfxSlider.value = savedSFX;
        sfxValue.textContent = savedSFX + '%';
    }

    // Load saved player name
    const savedName = localStorage.getItem('escape_player_name');
    if (savedName) {
        document.getElementById('playerName').value = savedName;
    }

    // Load local highscore
    const highscore = localStorage.getItem('escape_local_highscore') || 0;
    const hsElement = document.getElementById('localHighscore');
    if (hsElement) {
        hsElement.textContent = highscore;
    }
});

// Keyboard shortcuts
document.addEventListener('keydown', (e) => {
    // ESC to show menu (only if game is started)
    if (e.key === 'Escape' && gameStarted) {
        showMenu();
        gameStarted = false;
    }
});

// Show Game Over Screen (called by WASM)
function showGameOver(score) {
    hideAllScreens();
    document.getElementById('gameOverScreen').classList.remove('hidden');
    document.getElementById('finalScore').textContent = score;

    // Update local highscore
    const currentHS = parseInt(localStorage.getItem('escape_local_highscore') || 0);
    if (score > currentHS) {
        localStorage.setItem('escape_local_highscore', score);
    }

    // Request leaderboard
    if (window.requestLeaderboard) {
        window.requestLeaderboard();
    }

    console.log('💀 Game Over! Score:', score);
}

// Export functions for WASM to call
window.showMenu = showMenu;
window.hideMenu = hideMenu;
window.updateLeaderboard = updateLeaderboard;
window.showGameOver = showGameOver;

// Initialize on load
initWASM();

console.log('🎮 Game.js loaded - Retro Edition');