#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
data_cleanup.py
---------------
每日数据清理任务

功能：
1. 删除过期的正常音频（超过keep_normal_days天）
2. 异常音频永久保留（keep_anomaly_days=-1时不删除）
3. 删除过期的日志文件
"""

import sys
import logging
import shutil
from pathlib import Path
from datetime import datetime, timedelta
import yaml

logger = logging.getLogger('DataCleanup')


class DataCleaner:
    """数据清理器"""
    
    def __init__(self, config_file: Path):
        """初始化清理器"""
        self.config_file = config_file
        self.config = self._load_config()
        
        # 路径配置
        self.deploy_root = Path(__file__).parent.parent
        self.audio_root = self.deploy_root / "data" / "audio"
        self.anomaly_root = self.deploy_root / "data" / "anomaly_detected"
        self.backup_dir = self.deploy_root / "models" / "backups"
        self.logs_dir = self.deploy_root / "logs"
    
    def _load_config(self):
        """加载配置"""
        with open(self.config_file, 'r', encoding='utf-8') as f:
            return yaml.safe_load(f)
    
    def cleanup_old_normal_audio(self):
        """清理过期的正常音频"""
        keep_days = self.config['auto_training']['data']['keep_normal_days']
        cutoff_date = (datetime.now() - timedelta(days=keep_days)).strftime('%Y%m%d')
        
        logger.info(f"清理 {cutoff_date} 之前的正常音频（保留{keep_days}天）")
        
        total_deleted = 0
        total_size = 0
        
        if not self.audio_root.exists():
            return
        
        # deploy_pickup使用设备目录结构: audio/{device_code}/{date}/*.wav
        for device_dir in self.audio_root.iterdir():
            if not device_dir.is_dir():
                continue
            
            for date_dir in device_dir.iterdir():
                if not date_dir.is_dir() or date_dir.name == "current":
                    continue
                
                # 检查日期
                if date_dir.name < cutoff_date:
                    if date_dir.exists():
                        for f in date_dir.rglob("*.wav"):
                            total_size += f.stat().st_size
                            total_deleted += 1
                        
                        shutil.rmtree(date_dir)
                        logger.info(f"已删除: {device_dir.name}/{date_dir.name}")
        
        logger.info(f"正常音频清理完成: 删除 {total_deleted} 个文件, 释放 {total_size / 1e6:.2f} MB")
    
    def cleanup_old_anomaly_audio(self):
        """清理过期的异常音频（-1表示永久保留）"""
        keep_days = self.config['auto_training']['data']['keep_anomaly_days']
        
        if keep_days < 0:
            logger.info("异常音频配置为永久保留，跳过清理")
            return
        
        cutoff_date = (datetime.now() - timedelta(days=keep_days)).strftime('%Y%m%d')
        
        logger.info(f"清理 {cutoff_date} 之前的异常音频（保留{keep_days}天）")
        
        total_deleted = 0
        total_size = 0
        
        if not self.anomaly_root.exists():
            return
        
        for date_dir in self.anomaly_root.iterdir():
            if not date_dir.is_dir():
                continue
            
            if date_dir.name < cutoff_date:
                for f in date_dir.glob("*.wav"):
                    total_size += f.stat().st_size
                    total_deleted += 1
                
                shutil.rmtree(date_dir)
                logger.info(f"已删除: anomaly/{date_dir.name}")
        
        logger.info(f"异常音频清理完成: 删除 {total_deleted} 个文件, 释放 {total_size / 1e6:.2f} MB")
    
    def cleanup_old_logs(self):
        """清理过期的日志文件"""
        logs_config = self.config['auto_training'].get('logs', {})
        keep_days = logs_config.get('keep_days', 30)
        
        cutoff_date = datetime.now() - timedelta(days=keep_days)
        
        logger.info(f"清理 {keep_days} 天前的日志文件")
        
        total_deleted = 0
        total_size = 0
        
        if not self.logs_dir.exists():
            return
        
        for log_file in self.logs_dir.glob("*.log"):
            try:
                mtime = datetime.fromtimestamp(log_file.stat().st_mtime)
                
                if mtime < cutoff_date:
                    total_size += log_file.stat().st_size
                    log_file.unlink()
                    total_deleted += 1
                    logger.info(f"已删除日志: {log_file.name}")
            except Exception as e:
                logger.warning(f"删除日志失败: {log_file.name} | {e}")
        
        logger.info(f"日志清理完成: 删除 {total_deleted} 个文件, 释放 {total_size / 1e6:.2f} MB")
    
    def run_cleanup(self):
        """执行清理（主入口）"""
        try:
            logger.info("=" * 70)
            logger.info("开始每日数据清理")
            logger.info("=" * 70)
            
            self.cleanup_old_normal_audio()
            self.cleanup_old_anomaly_audio()
            self.cleanup_old_logs()
            
            logger.info("数据清理完成")
            return True
            
        except Exception as e:
            logger.error(f"数据清理失败: {e}", exc_info=True)
            return False


def main():
    """命令行入口"""
    logging.basicConfig(
        level=logging.INFO,
        format='%(asctime)s | %(levelname)-8s | %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )
    
    config_file = Path(__file__).parent.parent / "config" / "auto_training.yaml"
    cleaner = DataCleaner(config_file)
    success = cleaner.run_cleanup()
    
    sys.exit(0 if success else 1)


if __name__ == "__main__":
    main()