#!/bin/bash

# ========================================
# DHCP & DNS 管理器 - Linux 卸载脚本
# ========================================

set -e

INSTALL_DIR="/opt/dhcp-dns-manager"
SERVICE_NAME="dhcp-dns-manager"

echo "⚠️  警告：这将卸载 DHCP & DNS 管理器"
echo ""
read -p "是否继续？(y/N): " confirm

if [ "$confirm" != "y" ] && [ "$confirm" != "Y" ]; then
    echo "已取消"
    exit 0
fi

# 停止服务
echo "🛑 停止服务..."
systemctl stop $SERVICE_NAME || true
systemctl disable $SERVICE_NAME || true

# 删除 systemd 服务
echo "🗑️  删除 systemd 服务..."
rm -f /etc/systemd/system/$SERVICE_NAME.service
systemctl daemon-reload

# 删除安装目录
echo "🗑️  删除安装目录..."
rm -rf $INSTALL_DIR

# 删除防火墙规则
echo "🔥 清理防火墙规则..."
if command -v ufw &> /dev/null; then
    ufw delete allow 53/udp || true
    ufw delete allow 67/udp || true
    ufw delete allow 8080/tcp || true
elif command -v firewall-cmd &> /dev/null; then
    firewall-cmd --permanent --remove-port=53/udp || true
    firewall-cmd --permanent --remove-port=67/udp || true
    firewall-cmd --permanent --remove-port=8080/tcp || true
    firewall-cmd --reload || true
fi

echo ""
echo "✅ 卸载完成！"
echo ""
echo "注意：数据库文件已删除，如需保留请提前备份："
echo "  $INSTALL_DIR/data/dhcp-dns.db"
echo ""