#!/bin/bash
# Node.js 升级脚本（适用于 CentOS/RHEL）

echo "=========================================="
echo "   Node.js 版本升级工具"
echo "=========================================="
echo ""

# 检查当前版本
echo "[1/6] 检查当前 Node.js 版本..."
CURRENT_VERSION=$(node -v 2>/dev/null || echo "未安装")
echo "当前版本: $CURRENT_VERSION"
echo ""

# 备份现有项目
echo "[2/6] 备份当前项目..."
if [ -d "node_modules" ]; then
    echo "⏳ 备份 node_modules..."
    mv node_modules node_modules.backup.$(date +%Y%m%d_%H%M%S)
    echo "✅ 备份完成"
fi

if [ -f "package-lock.json" ]; then
    echo "⏳ 备份 package-lock.json..."
    cp package-lock.json package-lock.json.backup.$(date +%Y%m%d_%H%M%S)
    echo "✅ 备份完成"
fi

echo ""
echo "[3/6] 检测系统..."
if [ -f /etc/centos-release ]; then
    OS="centos"
    echo "✅ 检测到 CentOS/RHEL"
elif [ -f /etc/lsb-release ]; then
    OS="ubuntu"
    echo "✅ 检测到 Ubuntu/Debian"
else
    OS="unknown"
    echo "⚠️  未知系统"
fi

echo ""
echo "[4/6] 安装 Node.js 18..."

if [ "$OS" = "centos" ]; then
    # CentOS/RHEL
    echo "📦 使用 NodeSource 仓库..."
    
    # 清理旧的 NodeSource 仓库
    rm -f /etc/yum.repos.d/nodesource*.repo
    
    # 添加 Node.js 18.x 仓库
    curl -fsSL https://rpm.nodesource.com/setup_18.x | bash -
    
    # 安装 Node.js
    dnf install -y nodejs || yum install -y nodejs
    
elif [ "$OS" = "ubuntu" ]; then
    # Ubuntu/Debian
    echo "📦 使用 NodeSource 仓库..."
    
    # 安装依赖
    apt-get update
    apt-get install -y ca-certificates curl gnupg
    
    # 添加 Node.js 18.x 仓库
    curl -fsSL https://deb.nodesource.com/setup_18.x | bash -
    
    # 安装 Node.js
    apt-get install -y nodejs
    
else
    echo "❌ 无法自动安装，请手动安装 Node.js 18"
    echo ""
    echo "手动安装步骤："
    echo "1. 访问: https://nodejs.org/en/download/"
    echo "2. 下载 Node.js 18.x LTS 版本"
    echo "3. 安装后重新运行此脚本"
    exit 1
fi

echo ""
echo "[5/6] 验证新版本..."
NEW_VERSION=$(node -v)
NPM_VERSION=$(npm -v)
echo "✅ Node.js: $NEW_VERSION"
echo "✅ npm: $NPM_VERSION"

# 检查版本是否满足要求
MAJOR_VERSION=$(echo $NEW_VERSION | cut -d'.' -f1 | sed 's/v//')
if [ "$MAJOR_VERSION" -ge 18 ]; then
    echo "✅ 版本满足要求 (需要 ≥18.x)"
else
    echo "❌ 版本不满足要求 (需要 ≥18.x)"
    exit 1
fi

echo ""
echo "[6/6] 重新安装项目依赖..."
echo "⏳ 这可能需要几分钟..."

# 清理缓存
npm cache clean --force

# 重新安装
npm install

if [ $? -eq 0 ]; then
    echo "✅ 依赖安装成功"
else
    echo "❌ 依赖安装失败"
    echo ""
    echo "请手动执行："
    echo "  npm install"
    exit 1
fi

echo ""
echo "=========================================="
echo "   ✅ 升级完成！"
echo "=========================================="
echo ""
echo "📊 版本信息:"
echo "  Node.js: $(node -v)"
echo "  npm: $(npm -v)"
echo ""
echo "🎯 下一步:"
echo "  npm run dev          # 启动开发服务器"
echo "  npm run build        # 构建生产版本"
echo ""