github.js

const { execSync } = require('child_process');
const fs = require('fs');
const path = require('path');

function isNewer(local, remote) {
    const l = local.replace(/[^0-9.]/g, '').split('.').map(Number);
    const r = remote.replace(/[^0-9.]/g, '').split('.').map(Number);
    for (let i = 0; i < Math.max(l.length, r.length); i++) {
        const lVal = l[i] || 0;
        const rVal = r[i] || 0;
        if (rVal > lVal) return true;
        if (rVal < lVal) return false;
    }
    return false;
}

async function checkAndUpdate() {
    console.log('🔄 正在檢查更新 請稍後...');
    try {
        try {
            execSync('git --version', { stdio: 'ignore' });
        } catch (e) {
            console.log('⚠️ 伺服器未安裝 Git，跳過自動更新。');
            return;
        }

        try {
            execSync('git rev-parse --is-inside-work-tree', { stdio: 'ignore' });
        } catch (e) {
            execSync('git init', { stdio: 'ignore' });
            execSync('git branch -m main', { stdio: 'ignore' });
            execSync('git remote add origin https://github.com/kairo0916/cloudcat-bot.git', { stdio: 'ignore' });
        }

        const versionPath = path.join(__dirname, 'version.txt');
        let localVersion = '0.0.0';
        if (fs.existsSync(versionPath)) {
            localVersion = fs.readFileSync(versionPath, 'utf8').trim();
        }

        const response = await fetch('https://raw.githubusercontent.com/kairo0916/cloudcat-bot/main/version.txt');
        if (!response.ok) throw new Error('無法連接到 GitHub 獲取版本資訊');
        const remoteVersion = (await response.text()).trim();

        if (isNewer(localVersion, remoteVersion)) {
            console.log(`\n✨ 有新的版本更新！(v${remoteVersion})`);
            
            execSync('git fetch origin main', { stdio: 'ignore' });

            let packageChanged = false;
            try {
                execSync('git rev-parse HEAD', { stdio: 'ignore' });
                const diffOutput = execSync('git diff --name-only HEAD origin/main').toString().trim();
                const changedFiles = diffOutput ? diffOutput.split('\n') : [];
                
                if (changedFiles.includes('package.json')) packageChanged = true;

                console.log('📦 正在下載並覆蓋：');
                if (changedFiles.length > 0) {
                    changedFiles.forEach(file => {
                        console.log(`✔ ${file}`);
                    });
                } else {
                    console.log('✔ (僅版本號變更)');
                }
            } catch (e) {
                console.log('📦 正在進行首次全面同步 (強制覆蓋本地檔案)...');
                packageChanged = true; 
            }

            // 💥 終極殺招：放棄本地所有修改，強制與遠端完全一致！
            execSync('git reset --hard origin/main', { stdio: 'ignore' });
            
            if (packageChanged) {
                console.log('\n📦 發現更新中包含核心模組變動，正在自動安裝...');
                execSync('npm install', { stdio: 'inherit' });
            }

            console.log('\n✅ 更新完成！正在自動重啟...\n');
            process.exit(0);
        } else {
            console.log(`✅ 目前已是最新版本 (v${localVersion})，跳過更新。\n`);
        }
    } catch (error) {
        console.error('❌ 檢查更新時發生錯誤：', error.message);
        console.log('⚠️ 放棄更新，繼續啟動機器人...\n');
    }
}

module.exports = checkAndUpdate;