#!/bin/bash

# ========================================
# DHCP & DNS 管理器 - 诊断脚本
# ========================================

echo "🔍 DHCP & DNS 管理器 - 诊断工具"
echo "=================================="
echo ""

# 1. 查看服务状态
echo "📊 服务状态："
systemctl status dhcp-dns-manager --no-pager
echo ""

# 2. 查看详细日志
echo "📋 最近日志（最后 50 行）："
journalctl -u dhcp-dns-manager -n 50 --no-pager
echo ""

# 3. 检查配置文件
echo "⚙️  配置文件检查："
CONFIG_FILE="/opt/dhcp-dns-manager/configs/config.json"
if [ -f "$CONFIG_FILE" ]; then
    echo "✓ 配置文件存在: $CONFIG_FILE"
    echo "内容："
    cat "$CONFIG_FILE"
else
    echo "❌ 配置文件不存在！"
fi
echo ""

# 4. 检查可执行文件
echo "🔨 可执行文件检查："
EXEC_FILE="/opt/dhcp-dns-manager/dhcp-dns-manager"
if [ -f "$EXEC_FILE" ]; then
    echo "✓ 可执行文件存在: $EXEC_FILE"
    ls -lh "$EXEC_FILE"
    # 测试运行
    echo ""
    echo "测试运行（3 秒后自动退出）..."
    timeout 3 "$EXEC_FILE" -config "$CONFIG_FILE" 2>&1 || true
else
    echo "❌ 可执行文件不存在！"
fi
echo ""

# 5. 检查端口占用
echo "🔌 端口占用检查："
echo "DNS (53/udp):"
sudo netstat -ulpn 2>/dev/null | grep :53 || echo "  未占用"
echo "DHCP (67/udp):"
sudo netstat -ulpn 2>/dev/null | grep :67 || echo "  未占用"
echo "Web (8080/tcp):"
sudo netstat -tlnp 2>/dev/null | grep :8080 || echo "  未占用"
echo ""

# 6. 检查数据库目录
echo "💾 数据目录检查："
DATA_DIR="/opt/dhcp-dns-manager/data"
if [ -d "$DATA_DIR" ]; then
    echo "✓ 数据目录存在: $DATA_DIR"
    ls -la "$DATA_DIR"
else
    echo "❌ 数据目录不存在！"
fi
echo ""

# 7. 检查权限
echo "🔐 权限检查："
echo "安装目录："
ls -la /opt/dhcp-dns-manager/ | head -10
echo ""

# 8. 检查 systemd 服务文件
echo "📄 systemd 服务文件："
cat /etc/systemd/system/dhcp-dns-manager.service
echo ""

echo "=================================="
echo "诊断完成！"
echo ""
echo "💡 常见解决方案："
echo "1. 端口被占用 → 修改 configs/config.json 中的端口"
echo "2. 权限不足 → sudo systemctl restart dhcp-dns-manager"
echo "3. 配置错误 → 检查 configs/config.json 格式"
echo "4. 重新编译 → cd /vol1/@apphome/trim.openclaw/data/workspace/dhcp-dns-manager && sudo ./install.sh"
echo ""