"""
Copyright 2024-2026 ReplyPier

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""

import logging
import sys
from logging.handlers import RotatingFileHandler
import os

# Dictionary to store loggers by name
_loggers = {}


def get_logger(name=None):
    """
    Get or create a logger instance.
    Args:
        name: The name for the logger (typically __name__ from the calling module)
    Returns:
        A configured logger instance
    """
    # Use the provided name or default to 'app'
    logger_name = name or 'app'

    # Return existing logger if already created
    if logger_name in _loggers:
        return _loggers[logger_name]

    # Create new logger
    logger = logging.getLogger(logger_name)

    # Only set up handlers if they haven't been set up already
    if not logger.handlers:
        logger.setLevel(logging.DEBUG)

        # Create formatters and handlers
        formatter = logging.Formatter(
            '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
        )

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

        # File handler
        log_dir = 'logs'
        if not os.path.exists(log_dir):
            os.makedirs(log_dir)

        file_handler = RotatingFileHandler(
            f'{log_dir}/app.log',
            maxBytes=10485760,  # 10MB
            backupCount=5
        )
        file_handler.setFormatter(formatter)
        logger.addHandler(file_handler)

    # Store logger in dictionary
    _loggers[logger_name] = logger
    return logger