"""Logging configuration for the application."""

import logging
from logging.handlers import TimedRotatingFileHandler
import config


def setup_logger() -> logging.Logger:
    """Configure and return the application logger."""
    config.ensure_directories()

    logger = logging.getLogger("syllabus")
    logger.setLevel(config.LOG_LEVEL)

    # Remove any default handlers
    logger.handlers = []

    # Set up TimedRotatingFileHandler
    handler = TimedRotatingFileHandler(
        filename=str(config.LOG_FILE),
        when="midnight",
        interval=30,
        backupCount=12,
        encoding="utf-8",
        utc=False
    )

    formatter = logging.Formatter(config.LOG_FORMAT)
    handler.setFormatter(formatter)
    logger.addHandler(handler)

    return logger