// --- static/edit-mode.js ---

import { 
    apiAcquireLock, apiReleaseLock, apiSendHeartbeat, 
    apiGetLeafOptions, apiSyncLeafOptions, apiGenerateCli, apiExecuteConfig,
    apiSyncLeafOptionsStream // 🌟 新增這一個
} from './api.js';
import { getGlobalConnectionInfo } from './utils.js';

// --- 安全跳脫 HTML 特殊字元，防止破版 ---
function escapeHTML(str) {
    if (str === null || str === undefined) return "";
    return String(str)
        .replace(/&/g, "&")
        .replace(/</g, "&lt;")
        .replace(/>/g, "&gt;")
        .replace(/"/g, "&quot;")
        .replace(/'/g, "&#39;");
}

// ==========================================
// 1. 全域狀態與鎖定管理 (Lock Management)
// ==========================================
export const SESSION_USER_ID = crypto.randomUUID ? crypto.randomUUID() : 'user-' + Math.random().toString(36).substr(2, 9);
const ACTIVE_HEARTBEATS = {}; 

// 💡 追蹤當前編輯狀態 
export let currentEditPath = null;
export let currentEditElementId = null;
export let currentEditIsSuccess = false;
export let currentEditType = null; 
export let currentEditDiffs = []; // 🌟 新增：用來記錄這次修改了哪些路徑

export async function releaseAllLocks() {
    const keysToRelease = Object.keys(ACTIVE_HEARTBEATS);
    if (keysToRelease.length === 0) return;

    const releasePromises = keysToRelease.map(key => {
        // 🌟 解析出 host 與 path
        const [host, path] = key.split('@@');
        clearInterval(ACTIVE_HEARTBEATS[key]);
        delete ACTIVE_HEARTBEATS[key];
        return apiReleaseLock(path, SESSION_USER_ID, host)
            .catch(err => console.error(`釋放鎖定 ${path} 失敗:`, err));
    });

    await Promise.all(releasePromises);
    alert("您已閒置超過 5 分鐘，系統已自動釋放編輯鎖定並重新整理頁面。");
    location.reload();
}

// 🌟 加入 host 與 lockKey 參數
async function sendHeartbeat(path, host, intervalId, lockKey) {
    try {
        const response = await apiSendHeartbeat(path, SESSION_USER_ID, host);
        if (!response.ok) {
            console.warn(`心跳發送失敗 (${path}): 伺服器回傳 ${response.status}`);
            if (response.status === 404) {
                clearInterval(intervalId);
                if (ACTIVE_HEARTBEATS[lockKey] === intervalId) {
                    delete ACTIVE_HEARTBEATS[lockKey];
                }
            }
        }
    } catch (error) {
        console.error(`心跳請求發生錯誤 (${path}):`, error);
    }
}

// ==========================================
// 2. 編輯模式啟動與取消 (Folder & Leaf)
// ==========================================

export async function startEditFolder(path, elementId) {
    const connInfo = getGlobalConnectionInfo();
    const username = connInfo ? connInfo.user : 'admin';
    const host = connInfo ? connInfo.host : ''; // 🌟 取得設備 IP
    const lockKey = `${host}@@${path}`; 

    const currentMode = document.getElementById('configTask').value === 'form-full-config' ? 'full' : 'running';

    try {
        const result = await apiAcquireLock(path, SESSION_USER_ID, username, host);
        if (result.status === 409) return alert(`⚠️ ${result.data.detail}`); 
        
        if (result.data.status === 'success') {
            if (ACTIVE_HEARTBEATS[lockKey]) clearInterval(ACTIVE_HEARTBEATS[lockKey]);
            let intervalId;
            intervalId = setInterval(() => sendHeartbeat(path, host, intervalId, lockKey), 15000);
            ACTIVE_HEARTBEATS[lockKey] = intervalId;
            
            // 🌟 修正：加入安全檢查，避免找不到元素時發生 null 錯誤
            const editBtn = document.getElementById(`edit-btn-${elementId}`);
            if (editBtn) editBtn.style.display = 'none';
            
            const actionBtn = document.getElementById(`actions-${elementId}`);
            if (actionBtn) actionBtn.style.display = 'inline-block';
            
            const detailsEl = document.getElementById(`details-${elementId}`);
            if (detailsEl) detailsEl.open = true; 

            const contentDiv = document.getElementById(`content-${elementId}`);
            if (!contentDiv) {
                console.warn(`[防呆警告] 找不到 content-${elementId} 的容器，請略過此資料夾的編輯。`);
                return; // 找不到內容容器就提早結束，避免後續 querySelectorAll 報錯
            }
            const leafContainers = contentDiv.querySelectorAll('.leaf-container');
            
            let optData = {};
            // 🌟 修改 1：傳入 host 給 apiGetLeafOptions
            try { optData = await apiGetLeafOptions(host, currentMode); } catch (e) {}

            const pathsToSync = [];

            // ==========================================
            // 🌟 效能急救：分批渲染 (Chunking) 避免卡死主執行緒
            // ==========================================
            const containersArray = Array.from(leafContainers);
            const CHUNK_SIZE = 50; // 每次處理 50 個，確保畫面不結凍

            for (let i = 0; i < containersArray.length; i += CHUNK_SIZE) {
                const chunk = containersArray.slice(i, i + CHUNK_SIZE);
                
                chunk.forEach(container => {
                    const origVal = container.getAttribute('data-original');
                    const rawPath = container.getAttribute('data-path');
                    const safeOrigVal = escapeHTML(origVal);

                    let cacheKey = rawPath.replace(/::/g, ' ').replace(/\s*\[\d+\]/g, '');
                    if (rawPath.endsWith('::no')) cacheKey = cacheKey.replace(/ no$/, '') + ' ' + origVal;
                    let leafCache = optData[cacheKey];

                    if (!leafCache) pathsToSync.push(cacheKey);

                    let inputHtml = "";
                    let hintAttr = "";
                    let hintIcon = "";

                    if (leafCache && leafCache.hint) {
                        const safeHint = leafCache.hint.replace(/"/g, '&quot;');
                        hintAttr = `title="${safeHint}"`;
                        hintIcon = `<span style="cursor: help; margin-left: 6px; color: #e67e22; font-size: 14px;" title="${safeHint}">❓</span>`;
                    }

                    if (leafCache && leafCache.options && leafCache.options.length > 0) {
                        let options = leafCache.options;
                        if (origVal && !options.includes(origVal)) options = [origVal, ...options];

                        inputHtml = `<select class="edit-input" data-path="${rawPath}" ${hintAttr} style="padding: 2px 6px; border: 1px solid #3498db; border-radius: 3px; font-family: Courier New, monospace; font-size: 13px; width: 200px; height: 26px; outline: none; margin-left: 5px; background-color: white; cursor: pointer;">`;
                        options.forEach(opt => {
                            const safeOpt = escapeHTML(opt);
                            const isSelected = (opt === origVal) ? 'selected' : '';
                            inputHtml += `<option value="${safeOpt}" ${isSelected}>${safeOpt}</option>`;
                        });
                        inputHtml += `</select>${hintIcon}`;
                    } else {
                        inputHtml = `<input type="text" class="edit-input" data-path="${rawPath}" value="${safeOrigVal}" ${hintAttr} style="padding: 2px 6px; border: 1px solid #3498db; border-radius: 3px; font-family: Courier New, monospace; font-size: 13px; width: 200px; outline: none; margin-left: 5px;">${hintIcon}`;
                    }
                    container.innerHTML = inputHtml;
                });
                
                // 🌟 關鍵魔法：每處理完 50 個，就暫停 0 毫秒，讓瀏覽器有空檔去畫畫面或回應滑鼠
                await new Promise(resolve => setTimeout(resolve, 0)); 
            }

            // 🌟 傳入 host 給 apiSyncLeafOptions
            if (pathsToSync.length > 0) apiSyncLeafOptions(host, pathsToSync, currentMode);
        }
    } catch (error) {
        alert("❌ 無法連線到鎖定伺服器：" + error.message);
    }
}

export async function startEditLeaf(path, elementId) {
    const connInfo = getGlobalConnectionInfo();
    const username = connInfo ? connInfo.user : 'admin';
    const host = connInfo ? connInfo.host : '';
    const lockKey = `${host}@@${path}`;

    const currentMode = document.getElementById('configTask').value === 'form-full-config' ? 'full' : 'running';

    try {
        const result = await apiAcquireLock(path, SESSION_USER_ID, username, host);
        if (result.status === 409) return alert(`⚠️ ${result.data.detail}`); 
        
        if (result.data.status === 'success') {
            if (ACTIVE_HEARTBEATS[lockKey]) clearInterval(ACTIVE_HEARTBEATS[lockKey]);
            let intervalId;
            intervalId = setInterval(() => sendHeartbeat(path, host, intervalId, lockKey), 15000);
            ACTIVE_HEARTBEATS[lockKey] = intervalId;
            
            document.getElementById(`edit-btn-${elementId}`).style.display = 'none';
            document.getElementById(`actions-${elementId}`).style.display = 'inline-block';

            const container = document.getElementById(`container-${elementId}`);
            const origVal = container.getAttribute('data-original');
            const safeOrigVal = escapeHTML(origVal);
            
            container.innerHTML = `<span style="font-size: 12px; color: #e67e22; margin-left: 5px;">⏳ 設備連線與載入選項中...</span>`;
            
            try {
                // 🌟 修改 1：傳入 host
                let optData = await apiGetLeafOptions(host, currentMode);
                let cacheKey = path.replace(/::/g, ' ').replace(/\s*\[\d+\]/g, '');
                if (path.endsWith('::no')) cacheKey = cacheKey.replace(/ no$/, '') + ' ' + origVal;
                let leafCache = optData[cacheKey];

                if (!leafCache) {
                    // 🌟 修改 2：傳入 host
                    apiSyncLeafOptions(host, [cacheKey], currentMode);
                    let found = false;
                    for (let i = 0; i < 10; i++) {
                        await new Promise(resolve => setTimeout(resolve, 1000));
                        // 🌟 修改 3：傳入 host
                        optData = await apiGetLeafOptions(host, currentMode);
                        leafCache = optData[cacheKey];
                        if (leafCache && leafCache.options && leafCache.options.length > 0) {
                            found = true; break;
                        }
                    }
                }

                let inputHtml = "";
                let hintAttr = "";
                let hintIcon = "";

                if (leafCache && leafCache.hint) {
                    const safeHint = leafCache.hint.replace(/"/g, '&quot;');
                    hintAttr = `title="${safeHint}"`;
                    hintIcon = `<span style="cursor: help; margin-left: 6px; color: #e67e22; font-size: 14px;" title="${safeHint}">❓</span>`;
                }

                if (leafCache && leafCache.options && leafCache.options.length > 0) {
                    let options = leafCache.options;
                    if (origVal && !options.includes(origVal)) options = [origVal, ...options];

                    inputHtml = `<select class="edit-input" data-path="${path}" ${hintAttr} style="padding: 2px 6px; border: 1px solid #3498db; border-radius: 3px; font-family: Courier New, monospace; font-size: 13px; width: 200px; height: 26px; outline: none; margin-left: 5px; background-color: white; cursor: pointer;">`;
                    options.forEach(opt => {
                        const safeOpt = escapeHTML(opt);
                        const isSelected = (opt === origVal) ? 'selected' : '';
                        inputHtml += `<option value="${safeOpt}" ${isSelected}>${safeOpt}</option>`;
                    });
                    inputHtml += `</select>${hintIcon}`;
                } else {
                    inputHtml = `<input type="text" class="edit-input" data-path="${path}" value="${safeOrigVal}" ${hintAttr} style="padding: 2px 6px; border: 1px solid #3498db; border-radius: 3px; font-family: Courier New, monospace; font-size: 13px; width: 200px; outline: none; margin-left: 5px;">${hintIcon}`;
                }
                container.innerHTML = inputHtml;
            } catch (e) {
                container.innerHTML = `<input type="text" class="edit-input" data-path="${path}" value="${safeOrigVal}" style="padding: 2px 6px; border: 1px solid #3498db; border-radius: 3px; font-family: Courier New, monospace; font-size: 13px; width: 200px; outline: none; margin-left: 5px;">`;
            }
        }
    } catch (error) {
        alert("❌ 無法連線到鎖定伺服器：" + error.message);
    }
}

export async function cancelEditFolder(path, elementId) {
    const connInfo = getGlobalConnectionInfo();
    const host = connInfo ? connInfo.host : '';
    const lockKey = `${host}@@${path}`;

    if (ACTIVE_HEARTBEATS[lockKey]) {
        clearInterval(ACTIVE_HEARTBEATS[lockKey]);
        delete ACTIVE_HEARTBEATS[lockKey];
    }
    try { await apiReleaseLock(path, SESSION_USER_ID, host); } catch (error) {}
    
    document.getElementById(`edit-btn-${elementId}`).style.display = 'inline-block';
    document.getElementById(`actions-${elementId}`).style.display = 'none';

    const contentDiv = document.getElementById(`content-${elementId}`);
    const leafContainers = contentDiv.querySelectorAll('.leaf-container');
    leafContainers.forEach(container => {
        const origVal = container.getAttribute('data-original');
        const safeOrigVal = escapeHTML(origVal);
        container.innerHTML = `<span class="leaf-value" style="color: #16a085; margin-left: 5px; font-family: Courier New, monospace;">${safeOrigVal}</span>`;
    });
}

export async function cancelEditLeaf(path, elementId) {
    const connInfo = getGlobalConnectionInfo();
    const host = connInfo ? connInfo.host : '';
    const lockKey = `${host}@@${path}`;

    if (ACTIVE_HEARTBEATS[lockKey]) {
        clearInterval(ACTIVE_HEARTBEATS[lockKey]);
        delete ACTIVE_HEARTBEATS[lockKey];
    }
    try { await apiReleaseLock(path, SESSION_USER_ID, host); } catch (error) {}
    
    document.getElementById(`edit-btn-${elementId}`).style.display = 'inline-block';
    document.getElementById(`actions-${elementId}`).style.display = 'none';

    const container = document.getElementById(`container-${elementId}`);
    const origVal = container.getAttribute('data-original');
    const safeOrigVal = escapeHTML(origVal);
    container.innerHTML = `<span class="leaf-value" style="color: #16a085; margin-left: 5px; font-family: Courier New, monospace;">${safeOrigVal}</span>`;
}

// ==========================================
// 3. CLI 生成與預覽 (CLI Generation)
// ==========================================
function getInterfacesWithAdminState() {
    // 🌟 限制只從當前顯示的樹狀圖中抓取狀態
    const currentMode = document.getElementById('configTask').value === 'form-full-config' ? 'full' : 'running';
    const activeContainer = document.getElementById(`tree-container-${currentMode}`);
    if (!activeContainer) return [];
    
    const nodes = activeContainer.querySelectorAll('.leaf-container');
    const interfaces = new Set();
    nodes.forEach(node => {
        const path = node.getAttribute('data-path');
        if (path && path.endsWith('::admin-state')) {
            const interfacePath = path.replace('::admin-state', '').replace(/::/g, ' ').replace(/\s*\[\d+\]/g, '');
            interfaces.add(interfacePath);
        }
    });
    return Array.from(interfaces);
}

export async function previewFolderCLI(path, elementId) {
    currentEditPath = path;
    currentEditElementId = elementId;
    currentEditIsSuccess = false;
    currentEditType = 'folder'; 

    const contentDiv = document.getElementById(`content-${elementId}`);
    if (!contentDiv) return;

    const inputs = contentDiv.querySelectorAll('.edit-input');
    const diffs = [];

    inputs.forEach(input => {
        const container = input.closest('.leaf-container');
        if (!container) return;
        const originalVal = container.getAttribute('data-original') || "";
        const newVal = input.value.trim();
        const nodePath = container.getAttribute('data-path');
        
        if (originalVal !== newVal && nodePath) {
            diffs.push({ path: nodePath, old_val: originalVal, new_val: newVal });
        }
    });

    if (diffs.length === 0) return alert("沒有偵測到任何修改，無需生成指令！");
    currentEditDiffs = diffs; // 🌟 新增這行：記錄修改差異

    try {
        const result = await apiGenerateCli(diffs, getInterfacesWithAdminState());
        if (result.status === 'success') {
            showCliPreviewModal(result.data);
        } else {
            alert("CLI 生成失敗: " + result.message);
        }
    } catch (error) {
        console.error("Error generating CLI:", error);
        alert("網路連線錯誤，無法生成 CLI");
    }
}

export async function previewLeafCLI(path, elementId) {
    currentEditPath = path;
    currentEditElementId = elementId;
    currentEditIsSuccess = false;
    currentEditType = 'leaf'; 

    const container = document.getElementById(`container-${elementId}`);
    if (!container) return;

    const input = container.querySelector('.edit-input');
    if (!input) return;

    const originalVal = container.getAttribute('data-original') || "";
    const newVal = input.value.trim();
    if (originalVal === newVal) return alert("沒有偵測到任何修改，無需生成指令！");

    const diffs = [{ path: path, old_val: originalVal, new_val: newVal }];
    currentEditDiffs = diffs; // 🌟 新增這行：記錄修改差異

    try {
        const result = await apiGenerateCli(diffs, getInterfacesWithAdminState());
        if (result.status === 'success') {
            showCliPreviewModal(result.data);
        } else {
            alert("CLI 生成失敗: " + result.message);
        }
    } catch (error) {
        alert("網路連線錯誤，無法生成 CLI");
    }
}

function showCliPreviewModal(cliScript) {
    // 🌟 修改：改用 class 統一控制所有樹狀圖容器
    const leftPanes = document.querySelectorAll('.tree-view-instance');
    const resizer = document.getElementById('drag-resizer');
    const rightPane = document.getElementById('side-cli-preview');
    
    document.getElementById('side-pane-title').innerHTML = '⚠️ 即將寫入的指令';
    document.getElementById('side-pane-title').style.color = '#f1c40f';
    document.getElementById('btn-side-cancel').style.display = 'inline-block';
    document.getElementById('btn-side-confirm').style.display = 'inline-block';
    document.getElementById('btn-side-close').style.display = 'none';
    document.getElementById('btn-side-close').textContent = '關閉';
    document.getElementById('side-cli-textarea').style.display = 'block';
    document.getElementById('side-execution-result').style.display = 'none';
    
    const textarea = document.getElementById('side-cli-textarea');
    textarea.value = cliScript;
    
    // 👇 確保正常模式可以編輯，並明確恢復深色主題
    textarea.readOnly = false; 
    textarea.style.backgroundColor = '#1e1e1e'; // 恢復成標準的深色背景 (您可以依喜好微調顏色碼)
    textarea.style.color = '#ecf0f1';           // 確保字體是清晰的淺灰色 
    
    // 🌟 修改：遍歷所有樹狀圖容器進行縮放
    leftPanes.forEach(pane => pane.style.width = 'calc(50% - 11px)');
    rightPane.style.width = 'calc(50% - 11px)';
    resizer.style.display = 'flex';
    rightPane.style.display = 'block';
    
    if (!window.isResizerInitialized) {
        initResizer();
        window.isResizerInitialized = true;
    }
}

// ==========================================
// 4. 側邊欄與執行邏輯
// ==========================================
export async function hideSideCLI() {
    // 🌟 修改：改用 class 統一控制所有樹狀圖容器
    document.querySelectorAll('.tree-view-instance').forEach(pane => pane.style.width = '100%');
    document.getElementById('drag-resizer').style.display = 'none';
    document.getElementById('side-cli-preview').style.display = 'none';

    if (currentEditIsSuccess && currentEditElementId && currentEditPath) {
        const wrapper = document.getElementById(`display-wrapper-${currentEditElementId}`);
        if (wrapper) {
            const container = document.getElementById(`container-${currentEditElementId}`);
            const input = container ? container.querySelector('.edit-input') : null;
            const newCommand = input ? input.value.trim() : (container ? container.getAttribute('data-original') : '');
            
            if (currentEditType === 'folder') await cancelEditFolder(currentEditPath, currentEditElementId);
            else await cancelEditLeaf(currentEditPath, currentEditElementId);
            
            transformNoToActive(currentEditElementId, newCommand);
        } else {
            if (currentEditType === 'folder') await applyEditFolder(currentEditPath, currentEditElementId);
            else if (currentEditType === 'leaf') await applyEditLeaf(currentEditPath, currentEditElementId);
        }
    }

    currentEditPath = null;
    currentEditElementId = null;
    currentEditIsSuccess = false;
    currentEditType = null;
}

async function applyEditFolder(path, elementId) {
    const contentDiv = document.getElementById(`content-${elementId}`);
    if (contentDiv) {
        const inputs = contentDiv.querySelectorAll('.edit-input');
        inputs.forEach(input => {
            const container = input.closest('.leaf-container');
            if (container) container.setAttribute('data-original', input.value.trim()); 
        });
    }
    await cancelEditFolder(path, elementId);
}

async function applyEditLeaf(path, elementId) {
    const container = document.getElementById(`container-${elementId}`);
    if (container) {
        const input = container.querySelector('.edit-input');
        if (input) container.setAttribute('data-original', input.value.trim()); 
    }
    await cancelEditLeaf(path, elementId);
}

export function executeSideCLI() {
    const finalScript = document.getElementById('side-cli-textarea').value;
    document.getElementById('side-pane-title').innerHTML = '⏳ 正在寫入設備...';
    document.getElementById('side-pane-title').style.color = '#3498db';
    document.getElementById('btn-side-cancel').style.display = 'none';
    document.getElementById('btn-side-confirm').style.display = 'none';
    document.getElementById('btn-side-close').style.display = 'none'; 
    document.getElementById('side-cli-textarea').style.display = 'none';
    
    const resultBox = document.getElementById('side-execution-result');
    resultBox.style.display = 'block';
    resultBox.innerHTML = `<span style="color: #ecf0f1;">${finalScript}</span>`;
    
    executeGeneratedCLI(finalScript);
}

async function executeGeneratedCLI(script) {
    const connInfo = getGlobalConnectionInfo();
    if (!connInfo) return;

    const outputEl = document.getElementById('side-execution-result');

    try {
        const result = await apiExecuteConfig(script, connInfo.host, connInfo.user, connInfo.pass);
        
        if (result.status === 'success') {
            currentEditIsSuccess = true; 
            
            document.getElementById('side-pane-title').innerHTML = '✅ 寫入成功！正在從設備同步最新狀態...';
            document.getElementById('side-pane-title').style.color = '#f39c12'; 
            outputEl.innerHTML = `<span style="color: #ecf0f1;">${result.data}\n\n[系統] 正在背景重新抓取變更欄位的最新選項，請稍候...</span>`;
            
            const pathsToSync = currentEditDiffs.map(d => {
                let cacheKey = d.path.replace(/::/g, ' ').replace(/\s*\[\d+\]/g, '');
                if (d.path.endsWith('::no')) cacheKey = cacheKey.replace(/ no$/, '') + ' ' + d.old_val;
                return cacheKey;
            });
            const uniquePaths = [...new Set(pathsToSync)];

            try {
                // 🌟 修改：取得當前模式，並將 connInfo.host 與 currentMode 傳給 apiSyncLeafOptionsStream
                const currentMode = document.getElementById('configTask').value === 'form-full-config' ? 'full' : 'running';
                
                await apiSyncLeafOptionsStream(connInfo.host, uniquePaths, (data) => {
                    if (data.event === 'done') {
                        document.getElementById('side-pane-title').innerHTML = '✅ 執行與快取同步完美達成';
                        document.getElementById('side-pane-title').style.color = '#2ecc71';
                        document.getElementById('btn-side-close').style.display = 'inline-block'; 
                        outputEl.innerHTML += `<br><br><span style="color: #2ecc71;">[系統] 快取同步完成！您可以關閉此面板。</span>`;
                    } else if (data.event === 'error') {
                        document.getElementById('side-pane-title').innerHTML = '✅ 寫入成功 (但同步快取失敗)';
                        document.getElementById('side-pane-title').style.color = '#e74c3c';
                        document.getElementById('btn-side-close').style.display = 'inline-block'; 
                        outputEl.innerHTML += `<br><br><span style="color: #e74c3c;">[系統] 同步失敗: ${data.message}</span>`;
                    }
                }, currentMode);
            } catch (syncErr) {
                document.getElementById('btn-side-close').style.display = 'inline-block';
            }

        } else {
            currentEditIsSuccess = false; 
            document.getElementById('btn-side-close').style.display = 'inline-block';
            document.getElementById('side-pane-title').innerHTML = '❌ 執行失敗';
            document.getElementById('side-pane-title').style.color = '#ff6b6b'; 
            const rawLog = result.detail || result.message || '';
            outputEl.innerHTML = `<span style="color: #ecf0f1;">${highlightTerminalOutput(rawLog)}</span>`;
        }
    } catch (error) {
        document.getElementById('btn-side-close').style.display = 'inline-block';
        document.getElementById('side-pane-title').innerHTML = '❌ 連線錯誤';
        document.getElementById('side-pane-title').style.color = '#ff6b6b';
        outputEl.innerHTML = `<span style="color: #ff6b6b; font-weight: bold;">連線或伺服器錯誤: ${error}</span>`;
    }
}

// ==========================================
// 5. 輔助 UI 函數
// ==========================================
function initResizer() {
    const resizer = document.getElementById('drag-resizer');
    // 🌟 修改：改用 class 統一控制所有樹狀圖容器
    const leftPanes = document.querySelectorAll('.tree-view-instance');
    const rightPane = document.getElementById('side-cli-preview');
    const container = document.getElementById('split-container');
    let isResizing = false;

    resizer.addEventListener('mousedown', (e) => {
        isResizing = true;
        document.body.style.cursor = 'col-resize';
        document.body.style.userSelect = 'none'; 
    });

    document.addEventListener('mousemove', (e) => {
        if (!isResizing) return;
        const containerRect = container.getBoundingClientRect();
        let newLeftWidth = e.clientX - containerRect.left;
        const minWidth = containerRect.width * 0.2;
        const maxWidth = containerRect.width * 0.8;
        if (newLeftWidth < minWidth) newLeftWidth = minWidth;
        if (newLeftWidth > maxWidth) newLeftWidth = maxWidth;
        
        const leftPercentage = (newLeftWidth / containerRect.width) * 100;
        const rightPercentage = 100 - leftPercentage;
        // 🌟 修改：遍歷所有樹狀圖容器進行縮放
        leftPanes.forEach(pane => pane.style.width = `calc(${leftPercentage}% - 11px)`);
        rightPane.style.width = `calc(${rightPercentage}% - 11px)`;
    });

    document.addEventListener('mouseup', () => {
        if (isResizing) {
            isResizing = false;
            document.body.style.cursor = 'default';
            document.body.style.userSelect = 'auto'; 
        }
    });
}

function highlightTerminalOutput(text) {
    if (!text) return '';
    const lines = text.split('\n');
    const formattedLines = lines.map(line => {
        if (line.match(/(Aborted|Error|Warning|Failed|% Invalid|% Unknown|Bad command)/i)) {
            return `<span style="color: #ff6b6b; font-weight: bold;">${line}</span>`;
        }
        return line; 
    });
    return formattedLines.join('\n');
}

function transformNoToActive(elementId, newCommand) {
    const wrapper = document.getElementById(`display-wrapper-${elementId}`);
    if (!wrapper) return;

    const parts = newCommand.trim().split(' ');
    const firstWord = parts[0]; 
    const restCommand = parts.slice(1).join(' '); 

    const safeRestCommand = escapeHTML(restCommand);

    const svgEnabled = `<svg width="16" height="16" viewBox="0 0 24 24" fill="#27ae60"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8zM8.29 11.59L7 12.88l4 4 8-8-1.29-1.29L11 14.18z"/></svg>`;
    const iconHtml = `<span style="margin-right: 6px; display: inline-flex; align-items: center; justify-content: center; width: 18px; height: 18px;">${svgEnabled}</span>`;

    wrapper.innerHTML = `
        ${iconHtml}
        <b style="color: #2c3e50;">${firstWord}</b> 
        <span class="leaf-container" style="display: inline-flex; align-items: center; min-height: 24px;">
            <span class="leaf-value" style="color: #16a085; margin-left: 5px; font-family: Courier New, monospace; display: inline-block; transform: translateY(1.5px);">${safeRestCommand}</span>
            <span style="font-size: 0.8em; color: #f39c12; margin-left: 10px; border: 1px solid #f39c12; padding: 2px 6px; border-radius: 4px; background-color: #fffdf7;">(已啟用，重整後歸檔)</span>
        </span>
    `;
    
    const actionBtns = document.getElementById(`actions-${elementId}`);
    const editBtn = document.getElementById(`edit-btn-${elementId}`);
    if (actionBtns) actionBtns.style.display = 'none';
    if (editBtn) editBtn.style.display = 'none';
}

// ============================================================================
// 💻 開發者工具：預覽節點完整指令 (唯讀 Debug 模式)
// ============================================================================
export async function previewNodeCLI(btnElement, rootPath) {
    // 1. 定位當前點擊的容器
    let container = btnElement.closest('details');
    if (container) {
        const elementId = container.id.replace('details-', '');
        // 確保延遲渲染的內容已經載入 (Lazy Load)
        if (container.dataset.loaded !== 'true') {
            await window.lazyLoadFolder(elementId, false);
        }
    }
    const targetNode = container || btnElement.closest('.tree-leaf-node');
    if (!targetNode) return;

    // 2. 收集所有子節點資料
    const leafNodes = targetNode.querySelectorAll('.leaf-container');
    const interfaceGroups = {};

    leafNodes.forEach(node => {
        const path = node.getAttribute('data-path') || "";
        const val = node.getAttribute('data-original');
        if (!path) return;
        
        const parts = path.split('::');
        const paramName = parts.pop();
        // 移除虛擬陣列索引 [0], [1] 等，還原真實介面路徑
        let interfacePath = parts.join(' ').replace(/\s*\[\d+\]/g, '');

        if (!interfaceGroups[interfacePath]) {
            interfaceGroups[interfacePath] = [];
        }
        interfaceGroups[interfacePath].push({ param: paramName, val: val });
    });

    // 補強邏輯：處理使用者直接點擊葉節點的情況
    if (Object.keys(interfaceGroups).length === 0 && targetNode.classList.contains('tree-leaf-node')) {
        const singleNode = targetNode.querySelector('.leaf-container');
        if (singleNode) {
            const path = singleNode.getAttribute('data-path');
            const val = singleNode.getAttribute('data-original');
            const parts = path.split('::');
            const paramName = parts.pop();
            let interfacePath = parts.join(' ').replace(/\s*\[\d+\]/g, '');
            interfaceGroups[interfacePath] = [{ param: paramName, val: val }];
        }
    }

    if (Object.keys(interfaceGroups).length === 0) {
        return alert("此節點下沒有任何數值可供預覽！");
    }

    // 3. 在前端組裝平坦化 CLI (模擬真實設備指令)
    let cliLines = [];
    cliLines.push("! --- Read-Only Configuration Preview ---");
    for (const [interfacePath, params] of Object.entries(interfaceGroups)) {
        cliLines.push(`! Node: ${interfacePath || 'Global'}`);
        params.forEach(({param, val}) => {
            if (/^\[\d+\]$/.test(param)) {
                // 陣列元素本身就是值
                if (val) {
                    cliLines.push(interfacePath ? `${interfacePath} ${val}` : val);
                }
            } else if (param === 'no') {
                // 處理 no 指令
                cliLines.push(interfacePath ? `${interfacePath} no ${val}` : `no ${val}`);
            } else {
                // 一般鍵值對 (若 val 為空，代表是單純的 flag 指令)
                let line = interfacePath ? `${interfacePath} ${param}` : param;
                if (val) line += ` ${val}`;
                cliLines.push(line);
            }
        });
        cliLines.push("!");
    }
    const finalScript = cliLines.join('\n');
    
    // 4. 顯示唯讀預覽面板
    showReadOnlyCliPreviewModal(finalScript, rootPath);
}

// 專為 God-Mode 設計的唯讀面板 UI
function showReadOnlyCliPreviewModal(cliScript, rootPath) {
    const leftPanes = document.querySelectorAll('.tree-view-instance');
    const resizer = document.getElementById('drag-resizer');
    const rightPane = document.getElementById('side-cli-preview');

    document.getElementById('side-pane-title').innerHTML = `🔍 [唯讀預覽] ${rootPath}`;
    document.getElementById('side-pane-title').style.color = '#3498db';

    // 隱藏執行按鈕，只保留關閉
    document.getElementById('btn-side-confirm').style.display = 'none';
    document.getElementById('btn-side-cancel').style.display = 'none';
    const closeBtn = document.getElementById('btn-side-close');
    closeBtn.style.display = 'inline-block';
    closeBtn.textContent = '關閉預覽';

    const textarea = document.getElementById('side-cli-textarea');
    textarea.style.display = 'block';
    textarea.value = cliScript;
    textarea.readOnly = true; // 強制唯讀
    textarea.style.backgroundColor = '#2c3e50'; // 改變背景色提示唯讀狀態

    document.getElementById('side-execution-result').style.display = 'none';

    leftPanes.forEach(pane => pane.style.width = 'calc(50% - 11px)');
    rightPane.style.width = 'calc(50% - 11px)';
    if (resizer) resizer.style.display = 'flex';
    if (rightPane) rightPane.style.display = 'block';
    
    if (!window.isResizerInitialized && typeof initResizer === 'function') {
        initResizer();
        window.isResizerInitialized = true;
    }
}

// --- EOF (檔案結束) ---