# 创建安装目录和脚本
mkdir -p /root/monitor
cat > /root/monitor/cmd_monitor.sh << 'EOF'
#!/bin/bash

INSTALL_DIR="/root/monitor"
SCRIPT_PATH="$INSTALL_DIR/cmd_monitor.sh"
LOG_DIR="/root/command_logs"
PID_FILE="/tmp/cmd_monitor.pid"

# 获取客户端IP
get_client_ip() {
    local ip="unknown"
    [ -n "$SSH_CLIENT" ] && ip=$(echo "$SSH_CLIENT" | awk '{print $1}')
    [ "$ip" = "unknown" ] && [ -n "$SSH_CONNECTION" ] && ip=$(echo "$SSH_CONNECTION" | awk '{print $1}')
    echo "$ip"
}

# 检查to命令
if [ "$1" = "to" ]; then
    if [ -f "$PID_FILE" ] && ps -p $(cat "$PID_FILE") >/dev/null 2>&1; then
        echo "切换到前台模式..."
        kill $(cat "$PID_FILE") 2>/dev/null
        rm -f "$PID_FILE"
        exec "$SCRIPT_PATH" foreground
    else
        echo "切换到后台模式..."
        exec "$SCRIPT_PATH" background
    fi
    exit 0
fi

case "$1" in
    background|start)
        # 设置实时history
        for user_dir in /home/* /root; do
            [ -d "$user_dir" ] || continue
            bashrc="$user_dir/.bashrc"
            [ -f "$bashrc" ] || continue
            if ! grep -q "PROMPT_COMMAND.*history" "$bashrc" 2>/dev/null; then
                echo 'export PROMPT_COMMAND="history -a; history -c; history -r"' >> "$bashrc"
                echo "已为 $user_dir 设置实时history"
            fi
        done
        
        # 后台启动
        (
            echo "=== 后台监控启动: $(date) ===" >> "$LOG_DIR/monitor.log"
            declare -A last_sizes
            
            # 初始化文件大小
            for user_dir in /home/* /root; do
                [ -d "$user_dir" ] || continue
                user=$(basename "$user_dir")
                history_file="$user_dir/.bash_history"
                [ -f "$history_file" ] && last_sizes["$user"]=$(stat -c%s "$history_file" 2>/dev/null || echo 0)
            done
            
            while true; do
                for user_dir in /home/* /root; do
                    [ -d "$user_dir" ] || continue
                    user=$(basename "$user_dir")
                    history_file="$user_dir/.bash_history"
                    [ -f "$history_file" ] || continue
                    
                    current_size=$(stat -c%s "$history_file" 2>/dev/null || echo 0)
                    last_size=${last_sizes["$user"]:-0}
                    
                    if [ "$current_size" -gt "$last_size" ]; then
                        new_cmd=$(tail -n 1 "$history_file" 2>/dev/null | sed 's/^[ \t]*//;s/[ \t]*$//')
                        if [ -n "$new_cmd" ] && [ ${#new_cmd} -gt 1 ]; then
                            # 过滤简单命令
                            case "$new_cmd" in
                                ls|cd|pwd|ll|history|exit|clear|to|"."|"..")
                                    continue
                                    ;;
                                *)
                                    client_ip=$(get_client_ip)
                                    timestamp=$(date '+%Y-%m-%d %H:%M:%S')
                                    log_entry="[$timestamp] 用户:$user | 命令:$new_cmd | 来源:$client_ip"
                                    echo "$log_entry" >> "$LOG_DIR/monitor.log"
                                    ;;
                            esac
                        fi
                        last_sizes["$user"]=$current_size
                    fi
                done
                sleep 2
            done
        ) &
        
        echo $! > "$PID_FILE"
        echo "✅ 后台监控已启动 (PID: $!)"
        echo "📝 日志文件: $LOG_DIR/monitor.log"
        ;;
        
    foreground)
        echo "🔍 前台监控模式启动..."
        echo "💡 输入 'to' 切换到后台模式"
        echo "⏹️  按 Ctrl+C 停止监控"
        echo "================================"
        
        # 设置信号处理
        trap 'echo -e "\n🛑 停止监控"; exit 0' INT TERM
        
        declare -A last_sizes
        
        # 初始化文件大小
        for user_dir in /home/* /root; do
            [ -d "$user_dir" ] || continue
            user=$(basename "$user_dir")
            history_file="$user_dir/.bash_history"
            [ -f "$history_file" ] && last_sizes["$user"]=$(stat -c%s "$history_file" 2>/dev/null || echo 0)
        done
        
        while true; do
            # 检测to命令输入（非阻塞读取）
            if read -t 0.5 -n 2 input 2>/dev/null; then
                if [ "$input" = "to" ]; then
                    echo "🔄 切换到后台模式..."
                    "$SCRIPT_PATH" background
                    exit 0
                fi
            fi
            
            # 监控命令
            for user_dir in /home/* /root; do
                [ -d "$user_dir" ] || continue
                user=$(basename "$user_dir")
                history_file="$user_dir/.bash_history"
                [ -f "$history_file" ] || continue
                
                current_size=$(stat -c%s "$history_file" 2>/dev/null || echo 0)
                last_size=${last_sizes["$user"]:-0}
                
                if [ "$current_size" -gt "$last_size" ]; then
                    new_cmd=$(tail -n 1 "$history_file" 2>/dev/null | sed 's/^[ \t]*//;s/[ \t]*$//')
                    if [ -n "$new_cmd" ] && [ ${#new_cmd} -gt 1 ]; then
                        # 过滤简单命令
                        case "$new_cmd" in
                            ls|cd|pwd|ll|history|exit|clear|to|"."|"..")
                                continue
                                ;;
                            *)
                                client_ip=$(get_client_ip)
                                timestamp=$(date '+%Y-%m-%d %H:%M:%S')
                                echo "[$timestamp] 用户:$user | 命令:$new_cmd | 来源:$client_ip"
                                ;;
                        esac
                    fi
                    last_sizes["$user"]=$current_size
                fi
            done
            sleep 2
        done
        ;;
        
    stop)
        if [ -f "$PID_FILE" ]; then
            pid=$(cat "$PID_FILE")
            if ps -p "$pid" >/dev/null 2>&1; then
                kill "$pid" 2>/dev/null
                rm -f "$PID_FILE"
                echo "✅ 监控已停止 (PID: $pid)"
            else
                rm -f "$PID_FILE"
                echo "⚠️  监控进程不存在，已清理PID文件"
            fi
        else
            echo "ℹ️  监控未运行"
        fi
        ;;
        
    status)
        if [ -f "$PID_FILE" ]; then
            pid=$(cat "$PID_FILE")
            if ps -p "$pid" >/dev/null 2>&1; then
                echo "✅ 监控运行中 (PID: $pid)"
                echo "📝 日志文件: $LOG_DIR/monitor.log"
            else
                echo "❌ PID文件存在但进程不存在"
                rm -f "$PID_FILE"
            fi
        else
            echo "❌ 监控未运行"
        fi
        ;;
        
    install)
        # 创建日志目录
        mkdir -p "$LOG_DIR"
        
        # 设置开机自启动
        echo "🔧 设置开机自启动..."
        (crontab -l 2>/dev/null | grep -v "$SCRIPT_PATH"; echo "@reboot $SCRIPT_PATH background >/dev/null 2>&1") | crontab -
        
        # 设置to命令别名
        echo "🔧 设置命令别名..."
        for user_dir in /home/* /root; do
            [ -d "$user_dir" ] || continue
            bashrc="$user_dir/.bashrc"
            [ -f "$bashrc" ] || continue
            if ! grep -q "alias to=" "$bashrc" 2>/dev/null; then
                echo "alias to='$SCRIPT_PATH to'" >> "$bashrc"
                echo "✅ 已为 $user_dir 设置别名"
            fi
        done
        
        echo ""
        echo "🎉 安装完成!"
        echo "========================"
        echo "立即使用:"
        echo "  to              - 切换前后台模式"
        echo "  $SCRIPT_PATH foreground  - 前台模式"
        echo "  $SCRIPT_PATH background  - 后台模式"
        echo "  $SCRIPT_PATH stop        - 停止监控"
        echo "  $SCRIPT_PATH status      - 查看状态"
        echo ""
        echo "请运行: source ~/.bashrc"
        ;;
        
    logs)
        if [ -f "$LOG_DIR/monitor.log" ]; then
            tail -f "$LOG_DIR/monitor.log"
        else
            echo "日志文件不存在: $LOG_DIR/monitor.log"
        fi
        ;;
        
    *)
        echo "命令监控系统"
        echo "========================"
        echo "使用方法: $0 {foreground|background|stop|status|install|logs|to}"
        echo ""
        echo "命令说明:"
        echo "  install    - 安装并配置系统"
        echo "  foreground - 前台监控模式"
        echo "  background - 后台监控模式" 
        echo "  to         - 切换前后台模式"
        echo "  stop       - 停止监控"
        echo "  status     - 查看状态"
        echo "  logs       - 查看实时日志"
        echo ""
        echo "安装后直接使用 'to' 命令切换模式"
        ;;
esac
EOF

# 给脚本执行权限
chmod +x /root/monitor/cmd_monitor.sh

# 创建日志目录
mkdir -p /root/command_logs

# 执行安装
echo "开始安装监控系统..."
/root/monitor/cmd_monitor.sh install

# 重新加载bash配置
source ~/.bashrc

echo ""
echo "✅ 安装完成！"
echo "💡 现在可以测试: to"