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import logging
import logging.handlers
import sys
from pathlib import Path
from app.core.config import settings

# Create logs directory if it doesn't exist
logs_dir = Path("logs")
logs_dir.mkdir(exist_ok=True)

# Define formatters
DETAILED_FORMATTER = logging.Formatter(
    "%(asctime)s - %(name)s - %(levelname)s - [%(filename)s:%(lineno)d] - %(message)s",
    datefmt="%Y-%m-%d %H:%M:%S"
)

CONSOLE_FORMATTER = logging.Formatter(
    "%(asctime)s - %(levelname)s - %(message)s",
    datefmt="%H:%M:%S"
)

def setup_logging():
    """Configure logging for the application"""
    # Get root logger
    root_logger = logging.getLogger()
    
    # Clear any existing handlers
    root_logger.handlers.clear()
    
    # Set log level from settings
    log_level = getattr(logging, settings.LOG_LEVEL.upper(), logging.INFO)
    root_logger.setLevel(log_level)
    
    # Console Handler
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setFormatter(CONSOLE_FORMATTER)
    console_handler.setLevel(log_level)
    root_logger.addHandler(console_handler)
    
    # File Handler with rotation
    file_handler = logging.handlers.RotatingFileHandler(
        filename=logs_dir / "talk2sql.log",
        maxBytes=10 * 1024 * 1024,  # 10MB
        backupCount=5,
        encoding="utf-8"
    )
    file_handler.setFormatter(DETAILED_FORMATTER)
    file_handler.setLevel(log_level)
    root_logger.addHandler(file_handler)
    
    # Create separate error log file for ERROR and CRITICAL
    error_handler = logging.handlers.RotatingFileHandler(
        filename=logs_dir / "error.log",
        maxBytes=10 * 1024 * 1024,  # 10MB
        backupCount=5,
        encoding="utf-8"
    )
    error_handler.setFormatter(DETAILED_FORMATTER)
    error_handler.setLevel(logging.ERROR)
    root_logger.addHandler(error_handler)
    
    # Capture unhandled exceptions
    def handle_exception(exc_type, exc_value, exc_traceback):
        if issubclass(exc_type, KeyboardInterrupt):
            # Call the default handler for KeyboardInterrupt
            sys.__excepthook__(exc_type, exc_value, exc_traceback)
            return
        root_logger.error("Uncaught exception", exc_info=(exc_type, exc_value, exc_traceback))
    
    sys.excepthook = handle_exception
    
    # Log initial configuration
    root_logger.info(f"Logging configured with level: {settings.LOG_LEVEL}")
    return root_logger

def get_logger(name: str) -> logging.Logger:
    """Get a logger instance for a specific module"""
    return logging.getLogger(name)