import psutil
import GPUtil
import platform
from datetime import datetime
from typing import Dict, List, Optional
import logging
from pathlib import Path
import time

class SystemMonitor:
    """系统资源监控类"""
    
    def __init__(self):
        """初始化系统监控器"""
        self.logger = logging.getLogger(__name__)
        self._setup_logging()
        
    def _setup_logging(self):
        """设置日志"""
        log_dir = Path('.log')
        log_dir.mkdir(exist_ok=True)
        
        file_handler = logging.FileHandler(
            log_dir / f'system_monitor_{datetime.now():%Y%m%d_%H%M%S}.log'
        )
        file_handler.setFormatter(
            logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
        )
        self.logger.addHandler(file_handler)
        self.logger.setLevel(logging.INFO)
        
    def _get_gpu_info(self) -> List[Dict]:
        """获取GPU信息"""
        try:
            gpus = GPUtil.getGPUs()
            gpu_info = []
            
            for gpu in gpus:
                # 获取GPU进程信息
                processes = []
                
                # if gpu.processes:
                #     for proc in gpu.processes:
                #         process = psutil.Process(proc.pid)
                #         processes.append({
                #             'pid': proc.pid,
                #             'name': process.name(),
                #             'memory': proc.gpu_memory  # MB
                #         })
               
                
                gpu_info.append({
                    'id': gpu.id,
                    'name': gpu.name,
                    'memory': {
                        'total': gpu.memoryTotal,  # MB
                        'used': gpu.memoryUsed,    # MB
                        'free': gpu.memoryFree     # MB
                    },
                    'utilization': {
                        'gpu': gpu.load * 100,     # %
                        'memory': gpu.memoryUtil * 100  # %
                    },
                    'temperature': gpu.temperature, # °C
                    'power': {
                        'draw': gpu.powerDraw if hasattr(gpu, 'powerDraw') else None,    # W
                        'limit': gpu.powerLimit if hasattr(gpu, 'powerLimit') else None  # W
                    },
                    'processes': processes
                })
            
            return gpu_info
            
        except Exception as e:
            self.logger.error(f"获取GPU信息失败: {str(e)}")
            return []
            
    def _get_cpu_info(self) -> Dict:
        """获取CPU信息"""
        try:
            cpu_freq = psutil.cpu_freq()
            cpu_temp = psutil.sensors_temperatures().get('coretemp', [None])[0]
            
            return {
                'count': {
                    'physical': psutil.cpu_count(logical=False),
                    'logical': psutil.cpu_count(logical=True)
                },
                'utilization': psutil.cpu_percent(interval=1),  # %
                'frequency': {
                    'current': cpu_freq.current / 1000 if cpu_freq else None,  # GHz
                    'min': cpu_freq.min / 1000 if cpu_freq else None,         # GHz
                    'max': cpu_freq.max / 1000 if cpu_freq else None          # GHz
                },
                'temperature': cpu_temp.current if cpu_temp else None,  # °C
                'memory': self._get_memory_info(),
                'swap': self._get_swap_info()
            }
        except Exception as e:
            self.logger.error(f"获取CPU信息失败: {str(e)}")
            return {}
            
    def _get_memory_info(self) -> Dict:
        """获取内存信息"""
        try:
            mem = psutil.virtual_memory()
            return {
                'total': mem.total // (1024 * 1024),  # MB
                'used': mem.used // (1024 * 1024),    # MB
                'free': mem.free // (1024 * 1024),    # MB
                'percent': mem.percent                 # %
            }
        except Exception as e:
            self.logger.error(f"获取内存信息失败: {str(e)}")
            return {}
            
    def _get_swap_info(self) -> Dict:
        """获取交换内存信息"""
        try:
            swap = psutil.swap_memory()
            return {
                'total': swap.total // (1024 * 1024),  # MB
                'used': swap.used // (1024 * 1024),    # MB
                'free': swap.free // (1024 * 1024),    # MB
                'percent': swap.percent                 # %
            }
        except Exception as e:
            self.logger.error(f"获取交换内存信息失败: {str(e)}")
            return {}
            
    def _get_disk_info(self) -> Dict:
        """获取磁盘信息"""
        try:
            disk_info = {}
            for partition in psutil.disk_partitions():
                try:
                    usage = psutil.disk_usage(partition.mountpoint)
                    disk_info[partition.mountpoint] = {
                        'total': usage.total // (1024 * 1024),  # MB
                        'used': usage.used // (1024 * 1024),    # MB
                        'free': usage.free // (1024 * 1024),    # MB
                        'percent': usage.percent                 # %
                    }
                except (PermissionError, OSError):
                    continue
            return disk_info
        except Exception as e:
            self.logger.error(f"获取磁盘信息失败: {str(e)}")
            return {}
            
    def _get_process_info(self) -> Dict:
        """获取进程信息"""
        try:
            processes = {
                'total': len(psutil.pids()),
                'running': 0,
                'sleeping': 0
            }
            
            for proc in psutil.process_iter(['status']):
                try:
                    status = proc.info['status']
                    if status == 'running':
                        processes['running'] += 1
                    elif status == 'sleeping':
                        processes['sleeping'] += 1
                except (psutil.NoSuchProcess, psutil.AccessDenied):
                    continue
                    
            return processes
        except Exception as e:
            self.logger.error(f"获取进程信息失败: {str(e)}")
            return {}
            
    def get_system_resources(self) -> Dict:
        """
        获取系统资源使用情况
        
        Returns:
            系统资源信息
        """
        try:
            resources = {
                'gpu': self._get_gpu_info(),
                'cpu': self._get_cpu_info(),
                'disk': self._get_disk_info(),
                'processes': self._get_process_info()
            }
            
            self.logger.info("成功获取系统资源信息")
            
            return {
                'status': 'success',
                'resources': resources,
                'timestamp': datetime.now().strftime('%Y-%m-%dT%H:%M:%S')
            }
            
        except Exception as e:
            error_msg = f"获取系统资源信息失败: {str(e)}"
            self.logger.error(error_msg)
            return {
                'status': 'error',
                'message': '获取资源信息失败',
                'details': {
                    'error_type': type(e).__name__,
                    'error_message': str(e)
                }
            }