"""
Enhanced logging configuration - Independent module
"""
import logging
import os
from pathlib import Path
from logging.handlers import RotatingFileHandler


def setup_logging():
    """
    🔧 ENHANCED LOGGING SETUP
    """
    logger = logging.getLogger('reasoning_system')
    
    log_level_str = os.getenv('LOG_LEVEL', 'INFO').upper()
    log_level = getattr(logging, log_level_str, logging.INFO)
    logger.setLevel(log_level)
    
    if logger.handlers:
        return logger
    
    # Console handler
    console_handler = logging.StreamHandler()
    console_handler.setLevel(logging.INFO)
    console_format = logging.Formatter(
        '%(asctime)s | %(levelname)-8s | %(message)s',
        datefmt='%H:%M:%S'
    )
    console_handler.setFormatter(console_format)
    
    # File handler with rotation
    log_dir = Path('logs')
    log_dir.mkdir(exist_ok=True)
    
    file_handler = RotatingFileHandler(
        log_dir / 'reasoning_system.log',
        maxBytes=10*1024*1024,
        backupCount=5,
        encoding='utf-8'
    )
    file_handler.setLevel(logging.DEBUG)
    file_format = logging.Formatter(
        '%(asctime)s | %(levelname)-8s | %(name)s:%(lineno)d | %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )
    file_handler.setFormatter(file_format)
    
    # Error-only file handler
    error_handler = RotatingFileHandler(
        log_dir / 'errors.log',
        maxBytes=5*1024*1024,
        backupCount=3,
        encoding='utf-8'
    )
    error_handler.setLevel(logging.ERROR)
    error_handler.setFormatter(file_format)
    
    logger.addHandler(console_handler)
    logger.addHandler(file_handler)
    logger.addHandler(error_handler)
    logger.propagate = False
    
    return logger


# Initialize logger at module level
logger = setup_logging()