"""
日誌系統設定模組
"""
import logging
import sys
from pathlib import Path
from app.core.config import settings


class SensitiveFilter(logging.Filter):
    """過濾敏感資訊的日誌過濾器"""
    
    def filter(self, record):
        """過濾包含敏感資訊的日誌訊息"""
        sensitive_keywords = ['password', 'secret', 'key', 'token', 'api_key', 'db_password']
        msg = str(record.getMessage()).lower()
        
        for keyword in sensitive_keywords:
            if keyword in msg:
                # 只記錄錯誤類型，不記錄詳細內容
                record.msg = f"[敏感資訊已過濾] {record.name}"
                record.args = ()
                break
        
        return True


def setup_logging():
    """設定日誌系統"""
    # 建立 logs 目錄
    log_dir = Path("logs")
    log_dir.mkdir(exist_ok=True)
    
    # 設定日誌等級
    log_level = logging.DEBUG if settings.debug else logging.INFO
    
    # 設定日誌格式
    log_format = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
    date_format = '%Y-%m-%d %H:%M:%S'
    
    # 設定處理器
    handlers = [
        logging.StreamHandler(sys.stdout),
        logging.FileHandler('logs/app.log', encoding='utf-8')
    ]
    
    # 如果是生產環境，也記錄錯誤到單獨的檔案
    if settings.app_env == "production":
        error_handler = logging.FileHandler('logs/error.log', encoding='utf-8')
        error_handler.setLevel(logging.ERROR)
        handlers.append(error_handler)
    
    # 設定基本配置
    logging.basicConfig(
        level=log_level,
        format=log_format,
        datefmt=date_format,
        handlers=handlers
    )
    
    # 應用敏感資訊過濾器
    sensitive_filter = SensitiveFilter()
    for handler in logging.root.handlers:
        handler.addFilter(sensitive_filter)
    
    # 設定第三方庫的日誌等級
    logging.getLogger("httpx").setLevel(logging.WARNING)
    logging.getLogger("urllib3").setLevel(logging.WARNING)
    
    return logging.getLogger(__name__)


# 初始化日誌系統
logger = setup_logging()