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


def create_logger(
    name: str = "factuges-sync",
    *,
    level: int = logging.INFO,
    log_path: str | None = None,
) -> logging.Logger:
    """
    Crea un logger:
      - SIEMPRE stdout (Docker-friendly)
      - SOLO EN PRODUCCIÓN añade RotatingFileHandler si log_path no es None
    """

    logger = logging.getLogger(name)
    logger.setLevel(level)

    # No duplicar handlers si ya existe el logger
    if logger.handlers:
        return logger

    formatter = logging.Formatter("%(asctime)s - %(levelname)s - %(message)s")

    # ------------------------------------------------------------------
    # 1) Consola → SIEMPRE (para docker logs)
    # ------------------------------------------------------------------
    h_console = logging.StreamHandler(sys.stdout)
    h_console.setFormatter(formatter)
    logger.addHandler(h_console)

    # ------------------------------------------------------------------
    # 2) Fichero → SOLO en prod + si se define log_path
    # ------------------------------------------------------------------
    environment = os.getenv("ENV", "development")
    if environment == "production" and log_path:
        Path(log_path).parent.mkdir(parents=True, exist_ok=True)
        h_file = RotatingFileHandler(
            log_path,
            maxBytes=5 * 1024 * 1024,
            backupCount=15,
            encoding="utf8",
        )
        h_file.setFormatter(formatter)
        logger.addHandler(h_file)

    return logger


# logger "global" ya creado
logger = create_logger()