#!/bin/bash
echo "🐱 欢迎使用 Syncthing 萌化一键安装脚本！"
echo "✨ 开始安装 Syncthing..."

# 检测系统
if [ -f /etc/debian_version ]; then
    echo "🍥 检测到 Debian/Ubuntu 系统"
    # 安装 Syncthing
    curl -s -o /usr/share/keyrings/syncthing-archive-keyring.gpg https://syncthing.net/release-key.gpg
    echo "deb [signed-by=/usr/share/keyrings/syncthing-archive-keyring.gpg] https://apt.syncthing.net/ syncthing stable" | tee /etc/apt/sources.list.d/syncthing.list
    apt update && apt install -y syncthing
    
elif [ -f /etc/redhat-release ]; then
    echo "🎀 检测到 CentOS/RHEL 系统"
    dnf install -y syncthing || yum install -y epel-release && yum install -y syncthing
else
    echo "❌ 不支持的系统"
    exit 1
fi

echo "🎯 配置 Syncthing 服务..."
# 创建服务配置
cat > /etc/systemd/system/syncthing@root.service << 'EOF'
[Unit]
Description=Syncthing - Open Source Continuous File Synchronization for %i
Documentation=man:syncthing(1)
After=network.target

[Service]
User=%i
ExecStart=/usr/bin/syncthing serve --no-browser --no-restart --logflags=0 --gui-address="0.0.0.0:8384"
Restart=on-failure
SuccessExitStatus=3 4
RestartForceExitStatus=3 4

[Install]
WantedBy=multi-user.target
EOF

echo "🔧 设置防火墙..."
# 开放端口（如果防火墙开启的话）
if command -v ufw >/dev/null; then
    ufw allow 8384/tcp comment "Syncthing GUI"
    ufw allow 22000/tcp comment "Syncthing Transfer"
    ufw allow 21027/udp comment "Syncthing Discovery"
elif command -v firewall-cmd >/dev/null; then
    firewall-cmd --permanent --add-port=8384/tcp
    firewall-cmd --permanent --add-port=22000/tcp  
    firewall-cmd --permanent --add-port=21027/udp
    firewall-cmd --reload
fi

echo "📁 创建备份目录..."
mkdir -p /syncthing_backup
echo "💾 备份目录已创建: /syncthing_backup"

echo "🚀 启动服务..."
systemctl daemon-reload
systemctl enable syncthing@root
systemctl start syncthing@root

# 等待服务启动
sleep 5

echo "🎉 安装完成！"
echo ""
echo "========================================"
echo "🐾 Syncthing 管理界面访问信息："
echo "🌐 地址: http://$(curl -s ifconfig.me):8384/"
echo "💻 本地访问: http://localhost:8384/"
echo "📁 备份目录: /syncthing_backup"
echo "🔧 服务管理: systemctl status/start/stop syncthing@root"
echo "========================================"
echo ""
echo "💕 首次访问请通过网页设置设备名称和密码～"
echo "🐱 祝你使用愉快！"