// ============================================================
// DASHBOARD - Variables & State
// ============================================================
var ws = null;
var gsGrid = null;
var isLocked = false;
var state = {
    connected: false,
    cameras: null, currentCamera: null,
    items: null, currentItem: null,
    events: null, currentEvent: null,
    avatars: null, currentAvatar: null,
    system: null
};
var statusInterval = null;
var STORAGE_KEY = 'streamingle-dashboard-layout';
var currentTab = 'dashboard';

// ============================================================
// RETARGETING - Variables & State
// ============================================================
var rtWs = null;
var rtCharactersData = {};
var rtPresets = [];
var rtConnected = false;
var rtInitialized = false;

// ============================================================
// PREVIEW - Variables & State
// ============================================================
var previewImages = {};
var previewSubscribed = false;
var previewFullscreenIndex = -1;
var previewLastFrameTime = 0;
var previewStaleCheckInterval = null;
var previewDecodeStartTime = {};  // 카메라별 디코드 시작 시간 (0이면 idle, >0이면 디코딩 중)
var lastWsMessageTime = 0;        // 마지막 WS 메시지 수신 시각 (하트비트 감지용)
var heartbeatCheckInterval = null;
var clientPingInterval = null;    // 클라이언트→서버 keepalive ping (iOS WiFi 절전 방지)
var reconnectDelay = 300;         // 재연결 딜레이 (지수 백오프)
var reconnectCount = 0;           // 연속 재연결 횟수

// iOS/iPadOS 감지 (Chrome on iPad도 WebKit 엔진 사용)
var isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent)
         || (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1);

// ============================================================
// TAB SWITCHING
// ============================================================
function switchTab(tab) {
    currentTab = tab;

    // Toggle all 3 tabs
    ['dashboard', 'retargeting', 'preview'].forEach(function(t) {
        var btnId = 'tabBtn' + t.charAt(0).toUpperCase() + t.slice(1);
        var contentId = 'tab' + t.charAt(0).toUpperCase() + t.slice(1);
        var btn = document.getElementById(btnId);
        var content = document.getElementById(contentId);
        if (btn) btn.className = 'tab-btn' + (tab === t ? ' active' : '');
        if (content) content.className = 'tab-content' + (tab === t ? ' active' : '');
    });

    // Toggle header controls
    document.getElementById('dashboardControls').style.display = (tab === 'dashboard') ? '' : 'none';
    document.getElementById('retargetingControls').style.display = (tab === 'retargeting') ? '' : 'none';
    document.getElementById('previewControls').style.display = (tab === 'preview') ? '' : 'none';

    // Preview subscribe/unsubscribe
    if (tab === 'preview') {
        previewSubscribe();
        initPreviewGrid();
    } else {
        previewUnsubscribe();
    }

    // Lazy connect retargeting WS
    if (tab === 'retargeting' && !rtInitialized) {
        rtInitialized = true;
        rtConnectWebSocket();
    }
}

// ============================================================
// DASHBOARD - Widget Definitions
// ============================================================
var WIDGET_DEFS = {
    cameras: {
        title: 'Cameras',
        badgeId: 'camera-badge',
        defaultPos: { x: 0, y: 0, w: 6, h: 4, minW: 3, minH: 2 },
        content: function() {
            return '<div class="button-grid" id="cameraGrid"></div>';
        }
    },
    items: {
        title: 'Items',
        badgeId: 'item-badge',
        defaultPos: { x: 6, y: 0, w: 6, h: 4, minW: 3, minH: 2 },
        content: function() {
            return '<div class="button-grid" id="itemGrid"></div>' +
                '<div class="action-row">' +
                '<button class="btn btn-secondary btn-sm" onclick="sendCommand(\'activate_all_items\')">All On</button>' +
                '<button class="btn btn-secondary btn-sm" onclick="sendCommand(\'deactivate_all_items\')">All Off</button>' +
                '</div>';
        }
    },
    events: {
        title: 'Events',
        badgeId: 'event-badge',
        defaultPos: { x: 0, y: 4, w: 6, h: 3, minW: 3, minH: 2 },
        content: function() {
            return '<div class="button-grid" id="eventGrid"></div>';
        }
    },
    avatars: {
        title: 'Avatars',
        badgeId: 'avatar-badge',
        defaultPos: { x: 6, y: 4, w: 6, h: 4, minW: 3, minH: 2 },
        content: function() {
            return '<div id="avatarContainer"></div>';
        }
    },
    system: {
        title: 'System',
        badgeId: null,
        defaultPos: { x: 0, y: 8, w: 12, h: 5, minW: 4, minH: 3 },
        content: function() {
            return '<div class="system-group">' +
                '<div class="system-group-title">Screenshot</div>' +
                '<div class="action-row">' +
                '<button class="btn btn-primary btn-sm" onclick="sendCommand(\'capture_screenshot\')">Screenshot</button>' +
                '<button class="btn btn-primary btn-sm" onclick="sendCommand(\'capture_alpha_screenshot\')">Alpha</button>' +
                '<button class="btn btn-secondary btn-sm" onclick="sendCommand(\'open_screenshot_folder\')">Open Folder</button>' +
                '</div></div>' +
                '<div class="system-group">' +
                '<div class="system-group-title">Motion Recording</div>' +
                '<div class="action-row">' +
                '<button class="btn btn-danger btn-sm" id="btnStartRec" onclick="sendCommand(\'start_motion_recording\')">Start Rec</button>' +
                '<button class="btn btn-secondary btn-sm" onclick="sendCommand(\'stop_motion_recording\')">Stop Rec</button>' +
                '</div></div>' +
                '<div class="system-group">' +
                '<div class="system-group-title">Reconnect</div>' +
                '<div class="action-row">' +
                '<button class="btn btn-secondary btn-sm" onclick="sendCommand(\'reconnect_optitrack\')">OptiTrack</button>' +
                '<button class="btn btn-secondary btn-sm" onclick="sendCommand(\'reconnect_facial_motion\')">Facial</button>' +
                '</div></div>' +
                '<div class="system-group">' +
                '<div class="system-group-title">Cloth / Markers</div>' +
                '<div class="action-row">' +
                '<button class="btn btn-secondary btn-sm" onclick="sendCommand(\'reset_magica_cloth\')">Reset Cloth</button>' +
                '<button class="btn btn-secondary btn-sm" onclick="sendCommand(\'toggle_optitrack_markers\')">Toggle Markers</button>' +
                '</div></div>' +
                '<div class="system-group">' +
                '<div class="system-group-title">Retargeting Remote</div>' +
                '<div class="action-row">' +
                '<button class="btn btn-secondary btn-sm" onclick="sendCommand(\'toggle_retargeting_remote\')">Toggle Remote</button>' +
                '<button class="btn btn-secondary btn-sm" onclick="sendCommand(\'refresh_retargeting_characters\')">Refresh Characters</button>' +
                '</div></div>';
        }
    }
};

var PANEL_ORDER = ['cameras', 'items', 'events', 'avatars', 'system'];

// ============================================================
// DASHBOARD - GridStack Init
// ============================================================
function initGrid() {
    gsGrid = GridStack.init({
        column: 12,
        cellHeight: 70,
        margin: 6,
        animate: true,
        float: false,
        handle: '.widget-header',
        disableResize: false,
        disableDrag: false
    }, '#dashboardGrid');

    var saved = loadLayout();
    if (saved && saved.items && saved.items.length > 0) {
        for (var i = 0; i < saved.items.length; i++) {
            var item = saved.items[i];
            if (WIDGET_DEFS[item.id]) {
                addWidget(item.id, item);
            }
        }
        if (saved.locked) { toggleLock(); }
    } else {
        for (var j = 0; j < PANEL_ORDER.length; j++) {
            var id = PANEL_ORDER[j];
            addWidget(id, WIDGET_DEFS[id].defaultPos);
        }
    }

    gsGrid.on('change', function() { saveLayout(); });

    var updateColumns = function() {
        if (!gsGrid) return;
        gsGrid.column(window.innerWidth <= 768 ? 1 : 12);
    };
    updateColumns();
    window.addEventListener('resize', updateColumns);
    window.addEventListener('orientationchange', function() { setTimeout(updateColumns, 150); });
}

function addWidget(id, pos) {
    var def = WIDGET_DEFS[id];
    if (!def) return;

    var badgeHtml = def.badgeId
        ? ' <span class="section-badge" id="' + def.badgeId + '">0</span>'
        : '';

    var contentHtml =
        '<div class="widget">' +
            '<div class="widget-header">' +
                '<span class="widget-title">' + def.title + badgeHtml + '</span>' +
                '<button class="widget-close" onclick="hidePanel(\'' + id + '\')">&times;</button>' +
            '</div>' +
            '<div class="widget-body">' + def.content() + '</div>' +
        '</div>';

    gsGrid.addWidget({
        id: id,
        x: pos.x, y: pos.y,
        w: pos.w, h: pos.h,
        minW: def.defaultPos.minW,
        minH: def.defaultPos.minH,
        content: contentHtml
    });
}

// ============================================================
// DASHBOARD - Layout Persistence
// ============================================================
function saveLayout() {
    if (!gsGrid) return;
    var items = gsGrid.save(false);
    var data = { items: items, locked: isLocked };
    try { localStorage.setItem(STORAGE_KEY, JSON.stringify(data)); } catch(e) {}
}

function loadLayout() {
    try {
        var raw = localStorage.getItem(STORAGE_KEY);
        return raw ? JSON.parse(raw) : null;
    } catch(e) { return null; }
}

function resetLayout() {
    localStorage.removeItem(STORAGE_KEY);
    if (isLocked) toggleLock();
    gsGrid.removeAll();
    for (var i = 0; i < PANEL_ORDER.length; i++) {
        addWidget(PANEL_ORDER[i], WIDGET_DEFS[PANEL_ORDER[i]].defaultPos);
    }
    saveLayout();
    renderAll();
    hideSettings();
    showToast('레이아웃 초기화됨', 'success');
}

// ============================================================
// DASHBOARD - Panel Show/Hide
// ============================================================
function hidePanel(id) {
    var el = document.querySelector('.grid-stack-item[gs-id="' + id + '"]');
    if (el) gsGrid.removeWidget(el);
    saveLayout();
    updateSettingsToggles();
}

function showPanel(id) {
    if (document.querySelector('.grid-stack-item[gs-id="' + id + '"]')) return;
    addWidget(id, WIDGET_DEFS[id].defaultPos);
    rerenderWidget(id);
    saveLayout();
    updateSettingsToggles();
}

function getVisiblePanels() {
    if (!gsGrid) return [];
    var items = gsGrid.save(false);
    return items.map(function(item) { return item.id; });
}

function rerenderWidget(id) {
    switch(id) {
        case 'cameras': renderCameras(); break;
        case 'items': renderItems(); break;
        case 'events': renderEvents(); break;
        case 'avatars': renderAvatars(); break;
        case 'system': renderHealth(); break;
    }
}

// ============================================================
// DASHBOARD - Lock/Unlock
// ============================================================
function toggleLock() {
    isLocked = !isLocked;
    if (isLocked) {
        gsGrid.disable();
    } else {
        gsGrid.enable();
    }
    var btn = document.getElementById('btnLock');
    btn.innerHTML = isLocked ? '&#x1F512;' : '&#x1F513;';
    btn.className = 'btn-icon' + (isLocked ? ' locked' : '');
    saveLayout();
}

// ============================================================
// DASHBOARD - Settings Panel
// ============================================================
function showSettings() {
    var body = document.getElementById('settingsBody');
    body.innerHTML = '';
    var visible = getVisiblePanels();

    for (var i = 0; i < PANEL_ORDER.length; i++) {
        var id = PANEL_ORDER[i];
        var def = WIDGET_DEFS[id];
        var label = document.createElement('label');
        var cb = document.createElement('input');
        cb.type = 'checkbox';
        cb.checked = visible.indexOf(id) !== -1;
        cb.setAttribute('data-panel', id);
        cb.onchange = function() {
            var panelId = this.getAttribute('data-panel');
            if (this.checked) { showPanel(panelId); }
            else { hidePanel(panelId); }
        };
        label.appendChild(cb);
        label.appendChild(document.createTextNode(def.title));
        body.appendChild(label);
    }

    document.getElementById('settingsOverlay').classList.add('show');
}

function hideSettings() {
    document.getElementById('settingsOverlay').classList.remove('show');
}

function onSettingsOverlayClick(e) {
    if (e.target === document.getElementById('settingsOverlay')) {
        hideSettings();
    }
}

function updateSettingsToggles() {
    var overlay = document.getElementById('settingsOverlay');
    if (!overlay.classList.contains('show')) return;
    var visible = getVisiblePanels();
    var checkboxes = overlay.querySelectorAll('input[data-panel]');
    for (var i = 0; i < checkboxes.length; i++) {
        checkboxes[i].checked = visible.indexOf(checkboxes[i].getAttribute('data-panel')) !== -1;
    }
}

// ============================================================
// DASHBOARD - WebSocket
// ============================================================
function connectWebSocket() {
    var wsUrl = 'ws://' + window.location.hostname + ':{{WS_PORT}}/';
    ws = new WebSocket(wsUrl);
    ws.binaryType = 'arraybuffer';

    ws.onopen = function() {
        state.connected = true;
        lastWsMessageTime = Date.now();
        reconnectDelay = 300;
        reconnectCount = 0;
        updateConnectionStatus(true);
        startPolling();
        startClientPing();
        startHeartbeatCheck();
        if (currentTab === 'preview') {
            // 재연결 직후 프리뷰 구독 지연 — 연결 안정화 대기
            setTimeout(function() {
                if (state.connected && currentTab === 'preview') previewSubscribe();
            }, isIOS ? 1500 : 300);
        }
    };

    ws.onclose = function() {
        state.connected = false;
        previewUnsubscribe();
        stopHeartbeatCheck();
        stopClientPing();
        updateConnectionStatus(false);
        stopPolling();
        reconnectCount++;
        reconnectDelay = Math.min(reconnectDelay * 1.5, 5000);
        setTimeout(connectWebSocket, reconnectDelay);
    };

    ws.onerror = function(e) {
        console.error('WS Error:', e);
    };

    ws.onmessage = function(e) {
        lastWsMessageTime = Date.now();
        if (e.data instanceof ArrayBuffer) {
            handlePreviewBinary(e.data);
        } else {
            try {
                handleMessage(JSON.parse(e.data));
            } catch(err) {
                console.error('Parse error:', err);
            }
        }
    };
}

function send(data) {
    if (ws && ws.readyState === WebSocket.OPEN) {
        ws.send(JSON.stringify(data));
    }
}

function startPolling() {
    stopPolling();
    statusInterval = setInterval(function() { send({ type: 'get_system_status' }); }, 5000);
    send({ type: 'get_system_status' });
}

function stopPolling() {
    if (statusInterval) { clearInterval(statusInterval); statusInterval = null; }
}

// 클라이언트→서버 keepalive (iOS WiFi 절전으로 인한 연결 끊김 방지)
// iOS는 클라이언트→서버 방향 트래픽이 없으면 WiFi를 절전 모드로 전환하여 WS 연결을 끊음
function startClientPing() {
    stopClientPing();
    clientPingInterval = setInterval(function() {
        if (ws && ws.readyState === WebSocket.OPEN) {
            ws.send('{"type":"client_ping"}');
        }
    }, 3000);
}

function stopClientPing() {
    if (clientPingInterval) { clearInterval(clientPingInterval); clientPingInterval = null; }
}

// iPad 등에서 WebSocket이 죽어도 onclose가 안 뜨는 경우 감지 → 강제 재연결
function startHeartbeatCheck() {
    stopHeartbeatCheck();
    heartbeatCheckInterval = setInterval(function() {
        if (!state.connected) return;
        // 12초간 어떤 메시지도 수신 못 했으면 → 연결 죽은 것
        // (서버 keepalive 5초 + 클라이언트 ping/pong 3초 — 여유 있게 12초)
        if (Date.now() - lastWsMessageTime > 12000) {
            console.log('[WS] 하트비트 타임아웃 — 강제 재연결');
            forceReconnect();
        }
    }, 3000);
}

function stopHeartbeatCheck() {
    if (heartbeatCheckInterval) { clearInterval(heartbeatCheckInterval); heartbeatCheckInterval = null; }
}

function forceReconnect() {
    stopHeartbeatCheck();
    stopClientPing();
    stopPolling();
    previewUnsubscribe();
    state.connected = false;
    updateConnectionStatus(false);
    try { ws.close(); } catch(e) {}
    ws = null;
    reconnectCount++;
    reconnectDelay = Math.min(reconnectDelay * 1.5, 5000);
    setTimeout(connectWebSocket, reconnectDelay);
}

// ============================================================
// DASHBOARD - Connection Status
// ============================================================
function updateConnectionStatus(c) {
    var s = document.getElementById('connectionStatus');
    s.textContent = c ? '연결됨' : '연결 끊김';
    s.className = 'connection-status ' + (c ? 'connected' : 'disconnected');
}

// ============================================================
// DASHBOARD - Message Handling
// ============================================================
function handleMessage(msg) {
    switch (msg.type) {
        case 'connection_established':
            handleInitialState(msg.data);
            break;
        case 'camera_changed':
            state.cameras = msg.data.camera_data;
            state.currentCamera = msg.data.current_camera;
            renderCameras();
            break;
        case 'item_changed':
            state.items = msg.data.item_data;
            state.currentItem = msg.data.current_item;
            renderItems();
            break;
        case 'event_changed':
            state.events = msg.data.event_data;
            state.currentEvent = msg.data.current_event;
            renderEvents();
            break;
        case 'avatar_outfit_changed':
            state.avatars = msg.data.avatar_outfit_data;
            state.currentAvatar = msg.data.current_avatar_outfit;
            renderAvatars();
            break;
        case 'system_status_response':
            state.system = msg.data;
            renderHealth();
            break;
        case 'pong':
        case 'keepalive':
        case 'client_pong':
            break;
        case 'camera_preview_frame':
            handlePreviewBase64(msg.data);
            break;
        case 'drone_state_response':
            showToast(msg.data.is_drone_mode ? 'Drone Mode ON' : 'Drone Mode OFF', 'success');
            break;
    }
}

function handleInitialState(data) {
    state.cameras = data.camera_data;
    state.currentCamera = data.current_camera;
    state.items = data.item_data;
    state.currentItem = data.current_item;
    state.events = data.event_data;
    state.currentEvent = data.current_event;
    state.avatars = data.avatar_outfit_data;
    state.currentAvatar = data.current_avatar_outfit;

    renderAll();
    showToast('연결됨', 'success');
}

// ============================================================
// DASHBOARD - Render Functions
// ============================================================
function renderAll() {
    renderCameras();
    renderItems();
    renderEvents();
    renderAvatars();
    renderHealth();
}

function renderCameras() {
    var grid = document.getElementById('cameraGrid');
    var badge = document.getElementById('camera-badge');
    if (!grid) return;
    if (!state.cameras || !state.cameras.presets) {
        grid.innerHTML = '<div style="color:var(--text-muted);font-size:0.8em">카메라 없음</div>';
        if (badge) badge.textContent = '0';
        return;
    }

    if (badge) badge.textContent = state.cameras.camera_count;
    grid.innerHTML = '';

    for (var i = 0; i < state.cameras.presets.length; i++) {
        var p = state.cameras.presets[i];
        var btn = document.createElement('button');
        btn.className = 'preset-btn' + (p.isActive ? ' active' : '');
        btn.textContent = p.name;
        btn.setAttribute('data-index', p.index);
        btn.onclick = function() {
            send({ type: 'switch_camera', data: { camera_index: parseInt(this.getAttribute('data-index')) } });
        };
        grid.appendChild(btn);
    }
}

function renderItems() {
    var grid = document.getElementById('itemGrid');
    var badge = document.getElementById('item-badge');
    if (!grid) return;
    if (!state.items || !state.items.items) {
        grid.innerHTML = '<div style="color:var(--text-muted);font-size:0.8em">아이템 없음</div>';
        if (badge) badge.textContent = '0';
        return;
    }

    if (badge) badge.textContent = state.items.item_count;
    grid.innerHTML = '';

    for (var i = 0; i < state.items.items.length; i++) {
        var item = state.items.items[i];
        var btn = document.createElement('button');
        btn.className = 'preset-btn' + (item.isActive ? ' item-active' : '');
        btn.textContent = (item.isActive ? '\u2611 ' : '\u2610 ') + item.name;
        btn.setAttribute('data-index', item.index);
        btn.onclick = function() {
            send({ type: 'toggle_item', data: { item_index: parseInt(this.getAttribute('data-index')) } });
        };
        grid.appendChild(btn);
    }
}

function renderEvents() {
    var grid = document.getElementById('eventGrid');
    var badge = document.getElementById('event-badge');
    if (!grid) return;
    if (!state.events || !state.events.events) {
        grid.innerHTML = '<div style="color:var(--text-muted);font-size:0.8em">이벤트 없음</div>';
        if (badge) badge.textContent = '0';
        return;
    }

    if (badge) badge.textContent = state.events.event_count;
    grid.innerHTML = '';

    for (var i = 0; i < state.events.events.length; i++) {
        var evt = state.events.events[i];
        var btn = document.createElement('button');
        btn.className = 'preset-btn event-btn';
        btn.textContent = '\u25B6 ' + evt.name;
        btn.setAttribute('data-index', evt.index);
        btn.onclick = function() {
            var idx = parseInt(this.getAttribute('data-index'));
            send({ type: 'execute_event', data: { event_index: idx } });
            showToast('Event: ' + this.textContent.substring(2), 'success');
        };
        grid.appendChild(btn);
    }
}

function renderAvatars() {
    var container = document.getElementById('avatarContainer');
    var badge = document.getElementById('avatar-badge');
    if (!container) return;
    if (!state.avatars || !state.avatars.avatars) {
        container.innerHTML = '<div style="color:var(--text-muted);font-size:0.8em">아바타 없음</div>';
        if (badge) badge.textContent = '0';
        return;
    }

    if (badge) badge.textContent = state.avatars.avatar_count;
    container.innerHTML = '';

    for (var a = 0; a < state.avatars.avatars.length; a++) {
        var avatar = state.avatars.avatars[a];
        var group = document.createElement('div');
        group.className = 'avatar-group';

        var nameDiv = document.createElement('div');
        nameDiv.className = 'avatar-name';
        nameDiv.textContent = avatar.name;
        group.appendChild(nameDiv);

        var outfitGrid = document.createElement('div');
        outfitGrid.className = 'outfit-grid';

        if (avatar.outfits) {
            for (var o = 0; o < avatar.outfits.length; o++) {
                var outfit = avatar.outfits[o];
                var btn = document.createElement('button');
                btn.className = 'preset-btn' + (outfit.index === avatar.current_outfit_index ? ' active' : '');
                btn.textContent = outfit.name;
                btn.setAttribute('data-avatar', avatar.index);
                btn.setAttribute('data-outfit', outfit.index);
                btn.onclick = function() {
                    send({
                        type: 'set_avatar_outfit',
                        data: {
                            avatar_index: parseInt(this.getAttribute('data-avatar')),
                            outfit_index: parseInt(this.getAttribute('data-outfit'))
                        }
                    });
                };
                outfitGrid.appendChild(btn);
            }
        }

        group.appendChild(outfitGrid);
        container.appendChild(group);
    }
}

function renderHealth() {
    if (!state.system) return;

    var s = state.system;

    setHealth('health-optitrack', s.optitrack && s.optitrack.connected, 'OptiTrack');

    var facialCount = (s.facial_motion && s.facial_motion.client_count) || 0;
    setHealth('health-facial', facialCount > 0, 'Facial(' + facialCount + ')');

    var isRec = s.recording && s.recording.is_recording;
    var recEl = document.getElementById('health-recording');
    if (recEl) {
        var dot = recEl.querySelector('.health-dot');
        dot.className = 'health-dot ' + (isRec ? 'recording' : 'offline');
        recEl.querySelector('span:last-child').textContent = isRec ? 'REC' : 'IDLE';
    }

    var remoteRunning = s.retargeting_remote && s.retargeting_remote.is_running;
    setHealth('health-remote', remoteRunning, 'Remote');

    var clientCount = (s.websocket && s.websocket.connected_clients) || 0;
    setHealth('health-clients', true, 'WS(' + clientCount + ')');

    var btnRec = document.getElementById('btnStartRec');
    if (btnRec) {
        btnRec.textContent = isRec ? 'Recording...' : 'Start Rec';
        btnRec.className = isRec ? 'btn btn-danger btn-sm' : 'btn btn-primary btn-sm';
    }
}

function setHealth(elementId, online, label) {
    var el = document.getElementById(elementId);
    if (!el) return;
    var dot = el.querySelector('.health-dot');
    dot.className = 'health-dot ' + (online ? 'online' : 'offline');
    el.querySelector('span:last-child').textContent = label;
}

// ============================================================
// DASHBOARD - Commands
// ============================================================
function sendCommand(cmd) {
    send({ type: cmd });
    showToast(cmd.replace(/_/g, ' '), 'success');
}

function requestFullState() {
    send({ type: 'get_full_state' });
    send({ type: 'get_system_status' });
    showToast('Refreshing...', 'success');
}

// ============================================================
// SHARED - Toast
// ============================================================
function showToast(msg, type) {
    var t = document.getElementById('toast');
    t.textContent = msg;
    t.className = 'toast show ' + (type || '');
    setTimeout(function() { t.className = 'toast'; }, 2000);
}

// ============================================================
// RETARGETING - WebSocket
// ============================================================
function rtConnectWebSocket() {
    var rtWsPort = '{{RETARGETING_WS_PORT}}';
    if (!rtWsPort || rtWsPort === '0') {
        rtUpdateConnectionStatus(false, '리타게팅 포트 미설정');
        return;
    }

    var wsUrl = 'ws://' + window.location.hostname + ':' + rtWsPort + '/retargeting';
    rtWs = new WebSocket(wsUrl);

    rtWs.onopen = function() {
        rtConnected = true;
        rtUpdateConnectionStatus(true);
        rtSend({ action: 'refresh' });
    };

    rtWs.onclose = function() {
        rtConnected = false;
        rtUpdateConnectionStatus(false);
        setTimeout(function() {
            if (rtInitialized) rtConnectWebSocket();
        }, 3000);
    };

    rtWs.onerror = function(e) {
        console.error('RT WS Error:', e);
    };

    rtWs.onmessage = function(e) {
        try {
            rtHandleMessage(JSON.parse(e.data));
        } catch(err) {
            console.error('RT Parse error:', err);
        }
    };
}

function rtSend(data) {
    if (rtWs && rtWs.readyState === WebSocket.OPEN) {
        rtWs.send(JSON.stringify(data));
    }
}

function rtUpdateConnectionStatus(c, msg) {
    var s = document.getElementById('rtConnectionStatus');
    if (!s) return;
    s.textContent = msg || (c ? '리타게팅 연결됨' : '리타게팅 연결 끊김');
    s.className = 'rt-connection-status ' + (c ? 'connected' : 'disconnected');
}

// ============================================================
// RETARGETING - Message Handling
// ============================================================
function rtHandleMessage(d) {
    if (d.type === 'characterList') rtUpdateCharacterList(d.characters);
    else if (d.type === 'characterData') rtUpdateCharacterData(d);
    else if (d.type === 'handPosePresets') { rtPresets = d.presets; rtUpdateAllPresetGrids(); }
    else if (d.type === 'status') showToast(d.message, d.success ? 'success' : 'error');
}

function rtUpdateCharacterList(chars) {
    var container = document.getElementById('charactersContainer');
    container.innerHTML = '';

    if (chars.length === 0) {
        container.innerHTML = '<div class="loading-message">등록된 캐릭터가 없습니다</div>';
        return;
    }

    for (var i = 0; i < chars.length; i++) {
        var charId = chars[i];
        container.appendChild(rtCreateCharacterPanel(charId));
        rtSend({ action: 'getCharacterData', characterId: charId });
    }
}

// ============================================================
// RETARGETING - Character Panel Creation
// ============================================================
function rtCreateCharacterPanel(charId) {
    var panel = document.createElement('div');
    panel.className = 'character-panel';
    panel.id = 'panel_' + charId;

    panel.innerHTML =
        '<div class="character-header">' +
            '<h2>' + charId + '</h2>' +
        '</div>' +
        '<div class="character-content" id="content_' + charId + '">' +
            '<div class="character-inner">' +
                rtCreateSectionsHTML(charId) +
            '</div>' +
        '</div>';

    return panel;
}

function rtCreateSectionsHTML(charId) {
    var html = '';

    // 1. Weight Settings
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\u2696\uFE0F 가중치 설정</div>' +
        '<div class="rt-section-content hidden">' +
            '<div class="rt-sub-section-title">손과 프랍과의 범위 (가중치 1\u21920)</div>' +
            rtCreateRangeSlider(charId, 'limbMinDistance', 'limbMaxDistance', '거리 범위', 0, 1, 0.01) +
            '<div class="rt-sub-section-title">의자와 허리 거리 범위 (가중치 1\u21920)</div>' +
            rtCreateRangeSlider(charId, 'hipsMinDistance', 'hipsMaxDistance', '거리 범위', 0, 1, 0.01) +
            '<div class="rt-sub-section-title">바닥과 허리 높이 블렌딩 (가중치 0\u21921)</div>' +
            rtCreateRangeSlider(charId, 'groundHipsMinHeight', 'groundHipsMaxHeight', '높이 범위', 0, 2, 0.01) +
            '<div class="rt-sub-section-title">발 높이 IK 블렌딩 (가중치 1\u21920)</div>' +
            rtCreateRangeSlider(charId, 'footHeightMinThreshold', 'footHeightMaxThreshold', '높이 범위', 0.1, 1, 0.01) +
            '<div class="rt-sub-section-title">가중치 보간</div>' +
            rtCreateSlider(charId, 'weightSmoothSpeed', '변화 속도', 0.1, 20, 0.5) +
        '</div>' +
    '</div>';

    // 2. Hip Position
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\uD83E\uDDB4 힙 위치 보정 (로컬)</div>' +
        '<div class="rt-section-content hidden">' +
            rtCreateSlider(charId, 'hipsHorizontal', '\u2190 좌우 \u2192', -1, 1, 0.001) +
            rtCreateSlider(charId, 'hipsVertical', '\u2193 상하 \u2191', -1, 1, 0.001) +
            rtCreateSlider(charId, 'hipsForward', '\u2190 앞뒤 \u2192', -1, 1, 0.001) +
            '<div class="rt-sub-section-title">의자 앉기 높이</div>' +
            rtCreateSlider(charId, 'chairSeatHeightOffset', '높이 오프셋', -1, 1, 0.01) +
            '<button class="btn btn-secondary" onclick="rtResetHips(\'' + charId + '\')">힙 위치 리셋</button>' +
        '</div>' +
    '</div>';

    // 3. Knee Position
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\uD83E\uDDB5 무릎 위치 조정</div>' +
        '<div class="rt-section-content hidden">' +
            rtCreateSlider(charId, 'kneeFrontBackWeight', '무릎 앞/뒤 가중치', -1, 1, 0.01) +
            rtCreateSlider(charId, 'kneeInOutWeight', '무릎 안/밖 가중치', -1, 1, 0.01) +
        '</div>' +
    '</div>';

    // 4. Foot IK
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\uD83D\uDC5F 발 IK 위치 조정</div>' +
        '<div class="rt-section-content hidden">' +
            rtCreateSlider(charId, 'feetForwardBackward', '발 앞/뒤 오프셋', -1, 1, 0.01) +
            rtCreateSlider(charId, 'feetNarrow', '발 벌리기/모으기', -1, 1, 0.01) +
        '</div>' +
    '</div>';

    // 5. Hand Pose Presets
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\uD83D\uDD90\uFE0F 손가락 제어 설정</div>' +
        '<div class="rt-section-content hidden">' +
            '<div class="rt-toggle-row">' +
                '<label class="rt-toggle-label"><input type="checkbox" id="handPoseEnabled_' + charId + '" onchange="rtUpdateHandPoseEnabled(\'' + charId + '\', this.checked)"> <strong>스크립트 활성화</strong></label>' +
            '</div>' +
            '<div class="rt-toggle-row">' +
                '<label class="rt-toggle-label"><input type="checkbox" id="leftHandEnabled_' + charId + '" onchange="rtUpdateToggle(\'' + charId + '\', \'leftHandEnabled\', this.checked)"> 왼손</label>' +
                '<label class="rt-toggle-label"><input type="checkbox" id="rightHandEnabled_' + charId + '" onchange="rtUpdateToggle(\'' + charId + '\', \'rightHandEnabled\', this.checked)"> 오른손</label>' +
            '</div>' +
            '<div class="rt-preset-hint">클릭: 왼손 | 우클릭: 오른손</div>' +
            '<div class="rt-preset-grid" id="presetGrid_' + charId + '"></div>' +
        '</div>' +
    '</div>';

    // 6. Finger Copy
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\u270B 손가락 복제 설정</div>' +
        '<div class="rt-section-content hidden">' +
            '<div class="rt-control-group">' +
                '<label style="font-size:0.8em;color:var(--text-muted)">복제 방식</label>' +
                '<select id="fingerCopyMode_' + charId + '" onchange="rtUpdateFingerMode(\'' + charId + '\', this.value)">' +
                    '<option value="0">없음 (None)</option>' +
                    '<option value="1">Muscle Data</option>' +
                    '<option value="2">Rotation</option>' +
                    '<option value="3">Mingle</option>' +
                '</select>' +
            '</div>' +
            '<div id="mingleSettings_' + charId + '" class="mingle-settings" style="display:none;">' +
                '<div class="rt-sub-section-title">Mingle 캘리브레이션</div>' +
                '<p class="setting-description">소스 아바타의 손가락 회전 범위를 캘리브레이션하여 타겟에 적용합니다.</p>' +
                '<div class="rt-button-group">' +
                    '<button class="btn btn-secondary" onclick="rtCalibrateMingleOpen(\'' + charId + '\')">펼침 기록 (Open)</button>' +
                    '<button class="btn btn-secondary" onclick="rtCalibrateMingleClose(\'' + charId + '\')">모음 기록 (Close)</button>' +
                '</div>' +
            '</div>' +
        '</div>' +
    '</div>';

    // 7. Motion Settings
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\uD83D\uDCAA 모션 설정</div>' +
        '<div class="rt-section-content hidden">' +
            '<div class="rt-toggle-row">' +
                '<label class="rt-toggle-label"><input type="checkbox" id="useMotionFilter_' + charId + '" onchange="rtUpdateToggle(\'' + charId + '\', \'useMotionFilter\', this.checked)"> 모션 필터 사용</label>' +
            '</div>' +
            '<div id="motionFilterSettings_' + charId + '">' +
                rtCreateSlider(charId, 'filterBufferSize', '필터 버퍼 크기', 1, 20, 1) +
            '</div>' +
            '<div class="rt-toggle-row" style="margin-top:10px;">' +
                '<label class="rt-toggle-label"><input type="checkbox" id="useBodyRoughMotion_' + charId + '" onchange="rtUpdateToggle(\'' + charId + '\', \'useBodyRoughMotion\', this.checked)"> 몸 러프 모션 사용</label>' +
            '</div>' +
            '<div id="bodyRoughSettings_' + charId + '">' +
                rtCreateSlider(charId, 'bodyRoughness', '몸 러프니스', 0, 20, 0.5) +
            '</div>' +
        '</div>' +
    '</div>';

    // 8. Floor Height
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\uD83C\uDFE0 바닥 높이 설정</div>' +
        '<div class="rt-section-content hidden">' +
            rtCreateSlider(charId, 'floorHeight', '바닥 높이 (-1 ~ 1)', -1, 1, 0.01) +
        '</div>' +
    '</div>';

    // 9. Avatar/Head Scale
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\uD83D\uDCCF 아바타 크기 설정</div>' +
        '<div class="rt-section-content hidden">' +
            rtCreateSlider(charId, 'avatarScale', '아바타 크기', 0.1, 3, 0.01) +
            rtCreateSlider(charId, 'headScale', '머리 크기', 0.1, 3, 0.01) +
        '</div>' +
    '</div>';

    // 10. Head Rotation Offset
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\uD83D\uDDE3\uFE0F 머리 회전 오프셋</div>' +
        '<div class="rt-section-content hidden">' +
            rtCreateSlider(charId, 'headRotationOffsetX', 'X (Roll) - 좌우 기울기', -180, 180, 1) +
            rtCreateSlider(charId, 'headRotationOffsetY', 'Y (Yaw) - 좌우 회전', -180, 180, 1) +
            rtCreateSlider(charId, 'headRotationOffsetZ', 'Z (Pitch) - 상하 회전', -180, 180, 1) +
            '<div class="rt-button-group">' +
                '<button class="btn btn-secondary" onclick="rtResetHeadRotation(\'' + charId + '\')">회전 초기화</button>' +
                '<button class="btn btn-primary" onclick="rtCalibrateHeadForward(\'' + charId + '\')">정면 캘리브레이션</button>' +
            '</div>' +
        '</div>' +
    '</div>';

    // 11. Calibration
    html += '<div class="rt-section">' +
        '<div class="rt-section-header collapsed" onclick="rtToggleSection(this)">\uD83D\uDCD0 캘리브레이션</div>' +
        '<div class="rt-section-content hidden">' +
            '<div class="rt-calibration-status" id="calibrationStatus_' + charId + '">데이터 없음</div>' +
            '<div class="rt-button-group">' +
                '<button class="btn btn-primary" onclick="rtCalibrateIPose(\'' + charId + '\')">I-포즈 캘리브레이션</button>' +
                '<button class="btn btn-danger" onclick="rtResetCalibration(\'' + charId + '\')">캘리브레이션 초기화</button>' +
            '</div>' +
        '</div>' +
    '</div>';

    return html;
}

// ============================================================
// RETARGETING - Slider Helpers
// ============================================================
function rtCreateSlider(charId, id, label, min, max, step) {
    var fullId = id + '_' + charId;
    return '<div class="rt-control-group">' +
        '<div class="rt-slider-header">' +
            '<label>' + label + '</label>' +
            '<input type="number" class="rt-value-input" id="' + fullId + 'Input" min="' + min + '" max="' + max + '" step="' + step + '" value="0" ' +
                'onchange="rtInputValueChange(\'' + charId + '\', \'' + id + '\')" ' +
                'onkeydown="rtInputKeyDown(event, \'' + charId + '\', \'' + id + '\')">' +
        '</div>' +
        '<div class="rt-slider-row">' +
            '<button class="rt-btn-fine" onclick="rtFineAdjust(\'' + charId + '\', \'' + id + '\', ' + (-step) + ')">-</button>' +
            '<input type="range" id="' + fullId + '" min="' + min + '" max="' + max + '" step="' + step + '" value="0" ' +
                'oninput="rtSliderRealtime(\'' + charId + '\', \'' + id + '\')" ' +
                'onchange="rtSliderFinish(\'' + charId + '\', \'' + id + '\')">' +
            '<button class="rt-btn-fine" onclick="rtFineAdjust(\'' + charId + '\', \'' + id + '\', ' + step + ')">+</button>' +
        '</div>' +
    '</div>';
}

function rtCreateRangeSlider(charId, minId, maxId, label, min, max, step) {
    var minFullId = minId + '_' + charId;
    var maxFullId = maxId + '_' + charId;
    var fillId = 'rangeFill_' + minId + '_' + charId;
    return '<div class="rt-range-slider-group">' +
        '<div class="rt-range-slider-header">' +
            '<label>' + label + '</label>' +
            '<div class="rt-range-slider-values">' +
                '<input type="number" id="' + minFullId + 'Input" min="' + min + '" max="' + max + '" step="' + step + '" ' +
                    'onchange="rtRangeInputChange(\'' + charId + '\', \'' + minId + '\', \'' + maxId + '\', \'min\')">' +
                '<span>~</span>' +
                '<input type="number" id="' + maxFullId + 'Input" min="' + min + '" max="' + max + '" step="' + step + '" ' +
                    'onchange="rtRangeInputChange(\'' + charId + '\', \'' + minId + '\', \'' + maxId + '\', \'max\')">' +
            '</div>' +
        '</div>' +
        '<div class="rt-range-slider-container">' +
            '<div class="rt-range-slider-track"></div>' +
            '<div class="rt-range-slider-fill" id="' + fillId + '"></div>' +
            '<input type="range" id="' + minFullId + '" min="' + min + '" max="' + max + '" step="' + step + '" value="' + min + '" ' +
                'oninput="rtRangeSliderInput(\'' + charId + '\', \'' + minId + '\', \'' + maxId + '\', \'min\')" ' +
                'onchange="rtRangeSliderChange(\'' + charId + '\', \'' + minId + '\')">' +
            '<input type="range" id="' + maxFullId + '" min="' + min + '" max="' + max + '" step="' + step + '" value="' + max + '" ' +
                'oninput="rtRangeSliderInput(\'' + charId + '\', \'' + minId + '\', \'' + maxId + '\', \'max\')" ' +
                'onchange="rtRangeSliderChange(\'' + charId + '\', \'' + maxId + '\')">' +
        '</div>' +
    '</div>';
}

// ============================================================
// RETARGETING - Range Slider Logic
// ============================================================
function rtRangeSliderInput(charId, minId, maxId, which) {
    var minSlider = document.getElementById(minId + '_' + charId);
    var maxSlider = document.getElementById(maxId + '_' + charId);
    var minInput = document.getElementById(minId + '_' + charId + 'Input');
    var maxInput = document.getElementById(maxId + '_' + charId + 'Input');
    var fill = document.getElementById('rangeFill_' + minId + '_' + charId);

    var minVal = parseFloat(minSlider.value);
    var maxVal = parseFloat(maxSlider.value);

    if (which === 'min' && minVal > maxVal) { minSlider.value = maxVal; minVal = maxVal; }
    if (which === 'max' && maxVal < minVal) { maxSlider.value = minVal; maxVal = minVal; }

    minInput.value = minVal.toFixed(2);
    maxInput.value = maxVal.toFixed(2);

    var rangeMin = parseFloat(minSlider.min);
    var rangeMax = parseFloat(minSlider.max);
    var leftPercent = ((minVal - rangeMin) / (rangeMax - rangeMin)) * 100;
    var rightPercent = ((maxVal - rangeMin) / (rangeMax - rangeMin)) * 100;
    fill.style.left = leftPercent + '%';
    fill.style.width = (rightPercent - leftPercent) + '%';

    if (which === 'min') {
        rtSend({ action: 'updateValueRealtime', characterId: charId, property: minId, value: minVal });
    } else {
        rtSend({ action: 'updateValueRealtime', characterId: charId, property: maxId, value: maxVal });
    }
}

function rtRangeSliderChange(charId, id) {
    var slider = document.getElementById(id + '_' + charId);
    rtSend({ action: 'updateValueRealtime', characterId: charId, property: id, value: parseFloat(slider.value) });
}

function rtRangeInputChange(charId, minId, maxId, which) {
    var minInput = document.getElementById(minId + '_' + charId + 'Input');
    var maxInput = document.getElementById(maxId + '_' + charId + 'Input');
    var minSlider = document.getElementById(minId + '_' + charId);
    var maxSlider = document.getElementById(maxId + '_' + charId);

    var minVal = parseFloat(minInput.value);
    var maxVal = parseFloat(maxInput.value);

    if (which === 'min' && minVal > maxVal) { minVal = maxVal; minInput.value = minVal.toFixed(2); }
    if (which === 'max' && maxVal < minVal) { maxVal = minVal; maxInput.value = maxVal.toFixed(2); }

    minSlider.value = minVal;
    maxSlider.value = maxVal;
    rtRangeSliderInput(charId, minId, maxId, which);
}

function rtUpdateRangeSlider(charId, minId, maxId, minVal, maxVal) {
    var minSlider = document.getElementById(minId + '_' + charId);
    var maxSlider = document.getElementById(maxId + '_' + charId);
    var minInput = document.getElementById(minId + '_' + charId + 'Input');
    var maxInput = document.getElementById(maxId + '_' + charId + 'Input');
    var fill = document.getElementById('rangeFill_' + minId + '_' + charId);

    if (!minSlider || !maxSlider) return;

    minSlider.value = minVal;
    maxSlider.value = maxVal;
    minInput.value = minVal.toFixed(2);
    maxInput.value = maxVal.toFixed(2);

    var rangeMin = parseFloat(minSlider.min);
    var rangeMax = parseFloat(minSlider.max);
    var leftPercent = ((minVal - rangeMin) / (rangeMax - rangeMin)) * 100;
    var rightPercent = ((maxVal - rangeMin) / (rangeMax - rangeMin)) * 100;
    fill.style.left = leftPercent + '%';
    fill.style.width = (rightPercent - leftPercent) + '%';
}

// ============================================================
// RETARGETING - Section Toggle
// ============================================================
function rtToggleSection(header) {
    header.classList.toggle('collapsed');
    header.nextElementSibling.classList.toggle('hidden');
}

function rtExpandAll() {
    var headers = document.querySelectorAll('#tabRetargeting .rt-section-header');
    headers.forEach(function(h) { h.classList.remove('collapsed'); h.nextElementSibling.classList.remove('hidden'); });
}

function rtCollapseAll() {
    var headers = document.querySelectorAll('#tabRetargeting .rt-section-header');
    headers.forEach(function(h) { h.classList.add('collapsed'); h.nextElementSibling.classList.add('hidden'); });
}

// ============================================================
// RETARGETING - Character Data Update
// ============================================================
function rtUpdateCharacterData(r) {
    var charId = r.characterId;
    var data = r.data;
    rtCharactersData[charId] = data;

    var fields = ['hipsVertical','hipsForward','hipsHorizontal','kneeFrontBackWeight','kneeInOutWeight',
        'feetForwardBackward','feetNarrow','floorHeight','avatarScale','headScale',
        'weightSmoothSpeed','chairSeatHeightOffset',
        'filterBufferSize','bodyRoughness',
        'headRotationOffsetX','headRotationOffsetY','headRotationOffsetZ'];

    for (var i = 0; i < fields.length; i++) {
        rtSetSliderValue(charId, fields[i], data[fields[i]]);
    }

    rtUpdateRangeSlider(charId, 'limbMinDistance', 'limbMaxDistance', data.limbMinDistance, data.limbMaxDistance);
    rtUpdateRangeSlider(charId, 'hipsMinDistance', 'hipsMaxDistance', data.hipsMinDistance, data.hipsMaxDistance);
    rtUpdateRangeSlider(charId, 'groundHipsMinHeight', 'groundHipsMaxHeight', data.groundHipsMinHeight, data.groundHipsMaxHeight);
    rtUpdateRangeSlider(charId, 'footHeightMinThreshold', 'footHeightMaxThreshold', data.footHeightMinThreshold, data.footHeightMaxThreshold);

    var fingerMode = document.getElementById('fingerCopyMode_' + charId);
    if (fingerMode) {
        fingerMode.value = data.fingerCopyMode;
        rtUpdateMingleSettingsVisibility(charId);
    }

    rtSetCheckbox(charId, 'handPoseEnabled', data.handPoseEnabled);
    rtSetCheckbox(charId, 'leftHandEnabled', data.leftHandEnabled);
    rtSetCheckbox(charId, 'rightHandEnabled', data.rightHandEnabled);
    rtSetCheckbox(charId, 'useMotionFilter', data.useMotionFilter);
    rtSetCheckbox(charId, 'useBodyRoughMotion', data.useBodyRoughMotion);

    var cs = document.getElementById('calibrationStatus_' + charId);
    if (cs) {
        cs.textContent = data.hasCalibrationData ? '캘리브레이션 데이터가 저장되어 있습니다.' : '저장된 캘리브레이션 데이터가 없습니다.';
        cs.className = 'rt-calibration-status' + (data.hasCalibrationData ? ' has-data' : '');
    }

    rtUpdatePresetGrid(charId);
}

function rtSetSliderValue(charId, id, val) {
    var sl = document.getElementById(id + '_' + charId);
    var inp = document.getElementById(id + '_' + charId + 'Input');
    if (sl && val !== undefined && val !== null) sl.value = val;
    if (inp && val !== undefined && val !== null) inp.value = Number(val).toFixed(3);
}

function rtSetCheckbox(charId, id, checked) {
    var cb = document.getElementById(id + '_' + charId);
    if (cb) cb.checked = checked;
}

// ============================================================
// RETARGETING - Slider Interactions
// ============================================================
function rtSliderRealtime(charId, id) {
    var sl = document.getElementById(id + '_' + charId);
    var inp = document.getElementById(id + '_' + charId + 'Input');
    if (inp) inp.value = Number(sl.value).toFixed(3);
    rtSend({ action: 'updateValueRealtime', characterId: charId, property: id, value: parseFloat(sl.value) });
}

function rtInputValueChange(charId, id) {
    var sl = document.getElementById(id + '_' + charId);
    var inp = document.getElementById(id + '_' + charId + 'Input');
    if (sl && inp) {
        var val = parseFloat(inp.value);
        if (!isNaN(val)) {
            val = Math.max(parseFloat(sl.min), Math.min(parseFloat(sl.max), val));
            sl.value = val;
            inp.value = Number(val).toFixed(3);
            rtSend({ action: 'updateValueRealtime', characterId: charId, property: id, value: val });
        }
    }
}

function rtInputKeyDown(event, charId, id) {
    if (event.key === 'Enter') {
        event.preventDefault();
        rtInputValueChange(charId, id);
        event.target.blur();
    }
}

function rtSliderFinish(charId, id) {
    // drag complete
}

function rtFineAdjust(charId, id, delta) {
    var sl = document.getElementById(id + '_' + charId);
    var inp = document.getElementById(id + '_' + charId + 'Input');
    var nv = Math.max(parseFloat(sl.min), Math.min(parseFloat(sl.max), parseFloat(sl.value) + delta));
    sl.value = nv;
    if (inp) inp.value = Number(nv).toFixed(3);
    rtSend({ action: 'updateValueRealtime', characterId: charId, property: id, value: nv });
}

// ============================================================
// RETARGETING - Toggles & Controls
// ============================================================
function rtUpdateToggle(charId, prop, checked) {
    rtSend({ action: 'updateValueRealtime', characterId: charId, property: prop, value: checked ? 1 : 0 });

    if ((prop === 'leftHandEnabled' || prop === 'rightHandEnabled') && checked) {
        var scriptCheckbox = document.getElementById('handPoseEnabled_' + charId);
        if (scriptCheckbox) scriptCheckbox.checked = true;
    }
}

function rtUpdateHandPoseEnabled(charId, checked) {
    rtSend({ action: 'updateValueRealtime', characterId: charId, property: 'handPoseEnabled', value: checked ? 1 : 0 });
}

function rtUpdateFingerMode(charId, val) {
    rtSend({ action: 'updateValueRealtime', characterId: charId, property: 'fingerCopyMode', value: parseFloat(val) });
    rtUpdateMingleSettingsVisibility(charId);
}

function rtUpdateMingleSettingsVisibility(charId) {
    var mingleDiv = document.getElementById('mingleSettings_' + charId);
    var fingerMode = document.getElementById('fingerCopyMode_' + charId);
    if (mingleDiv && fingerMode) {
        mingleDiv.style.display = fingerMode.value === '3' ? 'block' : 'none';
    }
}

// ============================================================
// RETARGETING - Calibration & Reset
// ============================================================
function rtCalibrateIPose(charId) {
    rtSend({ action: 'calibrateIPose', characterId: charId });
}

function rtResetCalibration(charId) {
    rtSend({ action: 'resetCalibration', characterId: charId });
}

function rtCalibrateMingleOpen(charId) {
    rtSend({ action: 'calibrateMingleOpen', characterId: charId });
    showToast('펼침 상태 기록됨', 'success');
}

function rtCalibrateMingleClose(charId) {
    rtSend({ action: 'calibrateMingleClose', characterId: charId });
    showToast('모음 상태 기록됨', 'success');
}

function rtResetHips(charId) {
    ['hipsVertical','hipsForward','hipsHorizontal'].forEach(function(id) {
        rtSetSliderValue(charId, id, 0);
        rtSend({ action: 'updateValueRealtime', characterId: charId, property: id, value: 0 });
    });
}

function rtResetHeadRotation(charId) {
    ['headRotationOffsetX','headRotationOffsetY','headRotationOffsetZ'].forEach(function(id) {
        rtSetSliderValue(charId, id, 0);
        rtSend({ action: 'updateValueRealtime', characterId: charId, property: id, value: 0 });
    });
}

function rtCalibrateHeadForward(charId) {
    rtSend({ action: 'calibrateHeadForward', characterId: charId });
    showToast('정면 캘리브레이션 실행됨', 'success');
    setTimeout(function() {
        rtSend({ action: 'getCharacterData', characterId: charId });
    }, 100);
}

// ============================================================
// RETARGETING - Preset Grid
// ============================================================
function rtUpdateAllPresetGrids() {
    for (var charId in rtCharactersData) {
        rtUpdatePresetGrid(charId);
    }
}

function rtUpdatePresetGrid(charId) {
    var grid = document.getElementById('presetGrid_' + charId);
    if (!grid) return;

    grid.innerHTML = '';
    for (var i = 0; i < rtPresets.length; i++) {
        var btn = document.createElement('button');
        btn.className = 'rt-preset-btn';
        btn.textContent = rtPresets[i];
        btn.setAttribute('data-name', rtPresets[i]);
        btn.setAttribute('data-char', charId);
        btn.onclick = function() { rtApplyPreset(this.getAttribute('data-char'), this.getAttribute('data-name'), 'leftHandPreset'); };
        btn.oncontextmenu = function(e) { e.preventDefault(); rtApplyPreset(this.getAttribute('data-char'), this.getAttribute('data-name'), 'rightHandPreset'); };
        grid.appendChild(btn);
    }
}

function rtApplyPreset(charId, name, hand) {
    rtSend({ action: 'setHandPosePreset', characterId: charId, property: hand, stringValue: name });

    var scriptCheckbox = document.getElementById('handPoseEnabled_' + charId);
    if (scriptCheckbox) scriptCheckbox.checked = true;

    var handCheckbox = document.getElementById((hand === 'leftHandPreset' ? 'leftHandEnabled' : 'rightHandEnabled') + '_' + charId);
    if (handCheckbox) handCheckbox.checked = true;
}

// ============================================================
// RETARGETING - Refresh
// ============================================================
function rtRefresh() {
    if (!rtConnected) {
        rtConnectWebSocket();
        return;
    }
    rtSend({ action: 'refresh' });
    showToast('새로고침...', 'success');
}

// ============================================================
// CAMERA PREVIEW - Functions
// ============================================================
function initPreviewGrid() {
    var grid = document.getElementById('previewGrid');
    if (!grid || !state.cameras || !state.cameras.presets) return;
    grid.innerHTML = '';
    previewImages = {};

    for (var i = 0; i < state.cameras.presets.length; i++) {
        var p = state.cameras.presets[i];
        previewImages[p.index] = { name: p.name, isActive: p.isActive };
        var card = createPreviewCard(p.index, p.name, p.isActive);
        grid.appendChild(card);
    }

    var info = document.getElementById('previewInfo');
    if (info) info.textContent = '카메라 ' + state.cameras.camera_count + '개';
}

function createPreviewCard(index, name, isActive) {
    var card = document.createElement('div');
    card.className = 'preview-card' + (isActive ? ' active' : '');
    card.id = 'previewCard-' + index;

    var placeholder = document.createElement('div');
    placeholder.className = 'preview-placeholder';
    placeholder.id = 'previewPlaceholder-' + index;
    placeholder.textContent = '프리뷰 대기중...';

    // Canvas 사용 — Blob URL 생성 없이 직접 그리기
    var canvas = document.createElement('canvas');
    canvas.id = 'previewCanvas-' + index;
    canvas.className = 'preview-canvas';
    canvas.width = 320;
    canvas.height = 180;
    canvas.style.display = 'none';

    var label = document.createElement('div');
    label.className = 'preview-card-label';

    var nameSpan = document.createElement('span');
    nameSpan.className = 'preview-card-name';
    nameSpan.textContent = name;
    label.appendChild(nameSpan);

    if (isActive) {
        var badge = document.createElement('span');
        badge.className = 'preview-card-badge';
        badge.textContent = 'LIVE';
        label.appendChild(badge);
    }

    var expandBtn = document.createElement('button');
    expandBtn.className = 'preview-card-expand';
    expandBtn.innerHTML = '&#x26F6;';
    expandBtn.title = '풀스크린';
    expandBtn.onclick = function(e) {
        e.stopPropagation();
        showPreviewFullscreen(index);
    };
    label.appendChild(expandBtn);

    card.appendChild(placeholder);
    if (isIOS) {
        // iOS: <img> 태그 사용 (base64 텍스트 모드)
        var img = document.createElement('img');
        img.id = 'previewImg-' + index;
        img.style.width = '100%';
        img.style.aspectRatio = '16/9';
        img.style.objectFit = 'cover';
        img.style.display = 'none';
        img.style.background = '#111';
        card.appendChild(img);
    } else {
        card.appendChild(canvas);
    }
    card.appendChild(label);

    card.onclick = function() {
        send({ type: 'switch_camera', data: { camera_index: index } });
        showToast(name + ' 전환', 'success');
    };
    return card;
}

// 바이너리 WebSocket 프레임 파싱 + Canvas 렌더링
// 프로토콜: [index(1)][total(1)][flags(1)][nameLen(1)][name(N)][jpeg...]
// Blob URL 대신 createImageBitmap + Canvas로 직접 그리기 → Network 탭 오염 없음
function handlePreviewBinary(arrayBuffer) {
    previewLastFrameTime = Date.now();

    var buf = new Uint8Array(arrayBuffer);
    if (buf.length < 5) return;

    var cameraIndex = buf[0];
    var totalCameras = buf[1];
    var isActive = (buf[2] & 1) === 1;
    var nameLen = buf[3];
    var cameraName = new TextDecoder().decode(buf.subarray(4, 4 + nameLen));
    var jpegData = buf.subarray(4 + nameLen);

    // 디코드 잠금: 이전 디코딩 중이면 스킵, 단 3초 이상 걸리면 타임아웃으로 간주
    var now = Date.now();
    var decodeStart = previewDecodeStartTime[cameraIndex] || 0;
    if (decodeStart > 0 && now - decodeStart < 3000) return;
    previewDecodeStartTime[cameraIndex] = now;

    var blob = new Blob([jpegData], { type: 'image/jpeg' });
    createImageBitmap(blob).then(function(bitmap) {
        previewDecodeStartTime[cameraIndex] = 0;

        var canvas = document.getElementById('previewCanvas-' + cameraIndex);
        if (canvas) {
            canvas.width = bitmap.width;
            canvas.height = bitmap.height;
            var ctx = canvas.getContext('2d');
            ctx.drawImage(bitmap, 0, 0);
            canvas.style.display = 'block';
        }

        var placeholder = document.getElementById('previewPlaceholder-' + cameraIndex);
        if (placeholder) placeholder.style.display = 'none';

        if (previewFullscreenIndex === cameraIndex) {
            var fsCanvas = document.getElementById('previewFullscreenCanvas');
            if (fsCanvas) {
                fsCanvas.width = bitmap.width;
                fsCanvas.height = bitmap.height;
                var fsCtx = fsCanvas.getContext('2d');
                fsCtx.drawImage(bitmap, 0, 0);
            }
        }

        bitmap.close();
    }).catch(function() {
        previewDecodeStartTime[cameraIndex] = 0;
    });

    // 상태 저장 (비동기 디코딩 전에 저장)
    previewImages[cameraIndex] = {
        name: cameraName,
        isActive: isActive
    };

    // active 카드 스타일 + LIVE 배지 업데이트
    var card = document.getElementById('previewCard-' + cameraIndex);
    if (card) {
        card.className = 'preview-card' + (isActive ? ' active' : '');
        var badge = card.querySelector('.preview-card-badge');
        var label = card.querySelector('.preview-card-label');
        if (isActive && !badge && label) {
            var b = document.createElement('span');
            b.className = 'preview-card-badge';
            b.textContent = 'LIVE';
            label.appendChild(b);
        } else if (!isActive && badge) {
            badge.remove();
        }
    }

    // 그리드가 없으면 생성
    if (!document.getElementById('previewCard-' + cameraIndex)) {
        initPreviewGrid();
    }
}

// iOS용 base64 텍스트 프리뷰 프레임 처리 (바이너리 WS 대신 텍스트 JSON으로 수신)
// createImageBitmap + canvas 대신 <img> src에 직접 data URL 설정 → iOS WebKit에서 안정적
function handlePreviewBase64(data) {
    previewLastFrameTime = Date.now();

    var cameraIndex = data.camera_index;
    var cameraName = data.camera_name;
    var isActive = data.is_active;
    var totalCameras = data.total_cameras;

    var img = document.getElementById('previewImg-' + cameraIndex);
    if (img) {
        img.src = 'data:image/jpeg;base64,' + data.image;
        img.style.display = 'block';
    }

    var placeholder = document.getElementById('previewPlaceholder-' + cameraIndex);
    if (placeholder) placeholder.style.display = 'none';

    // 풀스크린 업데이트
    if (previewFullscreenIndex === cameraIndex) {
        var fsImg = document.getElementById('previewFullscreenImg');
        if (fsImg) fsImg.src = 'data:image/jpeg;base64,' + data.image;
    }

    // 상태 저장
    previewImages[cameraIndex] = { name: cameraName, isActive: isActive };

    // active 카드 스타일 + LIVE 배지
    var card = document.getElementById('previewCard-' + cameraIndex);
    if (card) {
        card.className = 'preview-card' + (isActive ? ' active' : '');
        var badge = card.querySelector('.preview-card-badge');
        var label = card.querySelector('.preview-card-label');
        if (isActive && !badge && label) {
            var b = document.createElement('span');
            b.className = 'preview-card-badge';
            b.textContent = 'LIVE';
            label.appendChild(b);
        } else if (!isActive && badge) {
            badge.remove();
        }
    }

    if (!document.getElementById('previewCard-' + cameraIndex)) {
        initPreviewGrid();
    }
}

function updatePreviewSettings() {
    var res = document.getElementById('previewResolution').value.split('x');
    var quality = parseInt(document.getElementById('previewQuality').value);
    var renderInterval = parseInt(document.getElementById('previewRenderInterval').value);

    send({
        type: 'update_preview_settings',
        data: {
            width: parseInt(res[0]),
            height: parseInt(res[1]),
            quality: quality,
            render_interval: renderInterval
        }
    });
    showToast('프리뷰 설정 변경', 'success');
}

function updatePreviewColumns() {
    var cols = parseInt(document.getElementById('previewColumns').value);
    var grid = document.getElementById('previewGrid');
    if (!grid) return;

    // 480px 이하에서는 커스텀 열 무시, 1열 고정
    if (window.innerWidth <= 480) {
        grid.style.gridTemplateColumns = '';
        grid.classList.add('mobile-single-col');
    } else {
        grid.classList.remove('mobile-single-col');
        if (cols === 0) {
            grid.style.gridTemplateColumns = 'repeat(auto-fill, minmax(300px, 1fr))';
        } else {
            grid.style.gridTemplateColumns = 'repeat(' + cols + ', 1fr)';
        }
    }

    try { localStorage.setItem('streamingle-preview-columns', cols); } catch(e) {}
}

// 저장된 열 설정 복원 + 리사이즈 대응
(function() {
    try {
        var saved = localStorage.getItem('streamingle-preview-columns');
        if (saved) {
            var sel = document.getElementById('previewColumns');
            if (sel) { sel.value = saved; updatePreviewColumns(); }
        }
    } catch(e) {}
    var resizeTimer;
    window.addEventListener('resize', function() {
        clearTimeout(resizeTimer);
        resizeTimer = setTimeout(updatePreviewColumns, 150);
    });
})();

function showPreviewFullscreen(index) {
    previewFullscreenIndex = index;
    var data = previewImages[index];
    if (!data) return;

    var overlay = document.createElement('div');
    overlay.className = 'preview-fullscreen';
    overlay.id = 'previewFullscreen';

    var closeBtn = document.createElement('button');
    closeBtn.className = 'preview-fullscreen-close';
    closeBtn.innerHTML = '&#x2715;';
    closeBtn.onclick = closePreviewFullscreen;

    var mediaEl;
    if (isIOS) {
        // iOS: <img> 태그 사용 (base64 모드)
        mediaEl = document.createElement('img');
        mediaEl.id = 'previewFullscreenImg';
        mediaEl.style.maxWidth = '95vw';
        mediaEl.style.maxHeight = '85vh';
        mediaEl.style.objectFit = 'contain';
        var srcImg = document.getElementById('previewImg-' + index);
        if (srcImg) mediaEl.src = srcImg.src;
    } else {
        // PC/Android: Canvas 사용 (바이너리 모드)
        mediaEl = document.createElement('canvas');
        mediaEl.id = 'previewFullscreenCanvas';
        mediaEl.className = 'preview-fullscreen-canvas';
        mediaEl.width = 320;
        mediaEl.height = 180;
        var srcCanvas = document.getElementById('previewCanvas-' + index);
        if (srcCanvas && srcCanvas.width > 0) {
            mediaEl.width = srcCanvas.width;
            mediaEl.height = srcCanvas.height;
            var ctx = mediaEl.getContext('2d');
            ctx.drawImage(srcCanvas, 0, 0);
        }
    }

    var label = document.createElement('div');
    label.className = 'preview-fullscreen-label';
    label.textContent = data.name;

    overlay.appendChild(closeBtn);
    overlay.appendChild(mediaEl);
    overlay.appendChild(label);
    overlay.onclick = function(e) { if (e.target === overlay) closePreviewFullscreen(); };
    document.body.appendChild(overlay);
}

function closePreviewFullscreen() {
    previewFullscreenIndex = -1;
    var el = document.getElementById('previewFullscreen');
    if (el) el.remove();
}

// ---- 프리뷰 구독 관리 (중앙화) ----
function previewSubscribe() {
    if (!state.connected || !ws || ws.readyState !== WebSocket.OPEN) return;
    // iOS: base64 텍스트 모드 요청 (WebKit 바이너리 WS 불안정 회피)
    if (isIOS) {
        send({ type: 'subscribe_preview', data: { format: 'base64' } });
    } else {
        send({ type: 'subscribe_preview' });
    }
    previewSubscribed = true;
    previewLastFrameTime = Date.now();
    startPreviewStaleCheck();
}

function previewUnsubscribe() {
    stopPreviewStaleCheck();
    if (previewSubscribed && state.connected && ws && ws.readyState === WebSocket.OPEN) {
        send({ type: 'unsubscribe_preview' });
    }
    previewSubscribed = false;
}

// 5초간 프레임 수신이 없으면 서버가 구독을 해제한 것으로 판단 → 자동 재구독
function startPreviewStaleCheck() {
    stopPreviewStaleCheck();
    previewStaleCheckInterval = setInterval(function() {
        if (!previewSubscribed || currentTab !== 'preview') {
            stopPreviewStaleCheck();
            return;
        }
        if (!state.connected || !ws || ws.readyState !== WebSocket.OPEN) return;

        if (Date.now() - previewLastFrameTime > 5000) {
            console.log('[Preview] 프레임 수신 정체 감지 — 재구독');
            send({ type: 'subscribe_preview' });
            previewLastFrameTime = Date.now();
        }
    }, 3000);
}

function stopPreviewStaleCheck() {
    if (previewStaleCheckInterval) {
        clearInterval(previewStaleCheckInterval);
        previewStaleCheckInterval = null;
    }
}

// Page Visibility API - 탭 비활성 시 프리뷰 구독 해제, 복귀 시 재구독
document.addEventListener('visibilitychange', function() {
    if (document.hidden) {
        previewUnsubscribe();
    } else if (currentTab === 'preview') {
        // iOS: 탭 복귀 시 약간의 딜레이 후 구독 (WiFi 복구 대기)
        if (isIOS) {
            setTimeout(function() {
                if (!document.hidden && currentTab === 'preview') previewSubscribe();
            }, 1500);
        } else {
            previewSubscribe();
        }
    }
});

// ============================================================
// INIT
// ============================================================
window.onload = function() {
    initGrid();
    connectWebSocket();

    // Prevent pull-to-refresh on mobile when scrolling within the page
    document.body.addEventListener('touchmove', function(e) {
        if (e.target.closest('.widget-body, .characters-container, .character-content, .settings-body, .preview-grid')) return;
    }, { passive: true });
};