"""
logger.py — Structured logging with rotating file handler + console output.

Usage:
    from logger import get_logger
    log = get_logger(__name__)
    log.info("Bot started")
"""

import logging
from logging.handlers import RotatingFileHandler

import config


def get_logger(name: str) -> logging.Logger:
    """Return a configured logger with console + rotating file handlers."""
    logger = logging.getLogger(name)

    # Avoid adding duplicate handlers on repeated calls
    if logger.handlers:
        return logger

    logger.setLevel(logging.DEBUG)
    formatter = logging.Formatter(
        fmt="%(asctime)s | %(levelname)-8s | %(name)s | %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
    )

    # Console handler — INFO and above
    console = logging.StreamHandler()
    console.setLevel(logging.INFO)
    console.setFormatter(formatter)
    logger.addHandler(console)

    # Rotating file handler — DEBUG and above
    file_handler = RotatingFileHandler(
        config.LOG_FILE,
        maxBytes=config.LOG_MAX_BYTES,
        backupCount=config.LOG_BACKUP_COUNT,
        encoding="utf-8",
    )
    file_handler.setLevel(logging.DEBUG)
    file_handler.setFormatter(formatter)
    logger.addHandler(file_handler)

    return logger