import logging
import os
from logging.handlers import RotatingFileHandler

def setup_logging():
    # 1. Log-Verzeichnis erstellen (falls nicht vorhanden)
    log_dir = "logs"
    if not os.path.exists(log_dir):
        os.makedirs(log_dir)

    log_file = os.path.join(log_dir, "mindnet.log")

    # 2. Formatter definieren (Zeitstempel | Level | Modul | Nachricht)
    formatter = logging.Formatter(
        '%(asctime)s | %(levelname)-8s | %(name)s | %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )

    # 3. File Handler: Schreibt in Datei (max. 5MB pro Datei, behält 5 Backups)
    file_handler = RotatingFileHandler(
        log_file, maxBytes=5*1024*1024, backupCount=5, encoding='utf-8'
    )
    file_handler.setFormatter(formatter)
    file_handler.setLevel(logging.INFO)

    # 4. Stream Handler: Schreibt weiterhin auf die Konsole
    console_handler = logging.StreamHandler()
    console_handler.setFormatter(formatter)
    console_handler.setLevel(logging.INFO)

    # 5. Root Logger konfigurieren
    logging.basicConfig(
        level=logging.INFO,
        handlers=[file_handler, console_handler]
    )

    logging.info(f"📝 Logging initialized. Writing to {log_file}")