import logging
from logging.handlers import RotatingFileHandler
import os

def setup_logger(
    name: str = "dronebot_logger",
    log_file: str = "logs/app.log",
    level: int = logging.DEBUG,
    max_bytes: int = 5 * 1024 * 1024,  # 5 MB
    backup_count: int = 3
) -> logging.Logger:
    """
    Set up a logger that logs to both console and file.

    Args:
        name (str): Logger name
        log_file (str): Path to log file
        level (int): Logging level (e.g., logging.INFO, logging.DEBUG)
        max_bytes (int): Max size of each log file before rotation
        backup_count (int): Number of rotated logs to keep

    Returns:
        logging.Logger: Configured logger instance
    """

    # Ensure log directory exists
    os.makedirs(os.path.dirname(log_file), exist_ok=True)

    # Create logger
    logger = logging.getLogger(name)
    logger.setLevel(level)
    logger.propagate = False  # Avoid double logging

    if not logger.handlers:
        # Formatter
        formatter = logging.Formatter(
            "[%(asctime)s] %(levelname)s — %(name)s — %(message)s",
            datefmt="%Y-%m-%d %H:%M:%S"
        )

        # Console handler
        console_handler = logging.StreamHandler()
        console_handler.setFormatter(formatter)
        logger.addHandler(console_handler)

        # Rotating file handler
        file_handler = RotatingFileHandler(
            log_file, maxBytes=max_bytes, backupCount=backup_count
        )
        file_handler.setFormatter(formatter)
        logger.addHandler(file_handler)

    return logger

logger = setup_logger()