import os
import logging
from logging.handlers import RotatingFileHandler

LOG_DIR = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'logs')
LOG_FILE = os.path.join(LOG_DIR, 'app.log')

def setup_logger():
    if not os.path.exists(LOG_DIR):
        os.makedirs(LOG_DIR, exist_ok=True)
        
    logger = logging.getLogger('TGAutoReplyPro')
    logger.setLevel(logging.INFO)
    
    # Avoid duplicate handlers if already configured
    if logger.handlers:
        return logger

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

    # Console Handler
    console_handler = logging.StreamHandler()
    console_handler.setFormatter(formatter)
    console_handler.setLevel(logging.INFO)
    logger.addHandler(console_handler)

    # File Handler
    file_handler = RotatingFileHandler(
        LOG_FILE,
        maxBytes=5 * 1024 * 1024,  # 5MB
        backupCount=5,
        encoding='utf-8'
    )
    file_handler.setFormatter(formatter)
    file_handler.setLevel(logging.INFO)
    logger.addHandler(file_handler)

    return logger

logger = setup_logger()