backend/utils/logger.py

"""
Logging configuration
"""
import logging
import os
from logging.handlers import RotatingFileHandler

def setup_logger(app):
    """
    Configure application logging
    
    Args:
        app: Flask application instance
    """
    # Create logs directory
    log_dir = 'logs'
    os.makedirs(log_dir, exist_ok=True)
    
    # Set log level
    log_level = getattr(logging, app.config.get('LOG_LEVEL', 'INFO'))
    
    # Configure root logger
    logging.basicConfig(
        level=log_level,
        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )
    
    # File handler with rotation
    log_file = app.config.get('LOG_FILE', os.path.join(log_dir, 'app.log'))
    file_handler = RotatingFileHandler(
        log_file,
        maxBytes=10 * 1024 * 1024,  # 10MB
        backupCount=5
    )
    file_handler.setLevel(log_level)
    file_handler.setFormatter(logging.Formatter(
        '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
    ))
    
    # Console handler
    console_handler = logging.StreamHandler()
    console_handler.setLevel(log_level)
    console_handler.setFormatter(logging.Formatter(
        '%(asctime)s - %(levelname)s - %(message)s'
    ))
    
    # Add handlers to app logger
    app.logger.addHandler(file_handler)
    app.logger.addHandler(console_handler)
    app.logger.setLevel(log_level)
    
    # Set library log levels
    logging.getLogger('werkzeug').setLevel(logging.WARNING)
    logging.getLogger('urllib3').setLevel(logging.WARNING)
    
    app.logger.info("Logging configured successfully")