# 3rd party dependencies
import tensorflow as tf

# package dependencies
from deepface.commons import logger as log

logger = log.get_singletonish_logger()


def get_tf_major_version() -> int:
    """
    Find tensorflow's major version
    Returns
        major_version (int)
    """
    return int(tf.__version__.split(".", maxsplit=1)[0])


def get_tf_minor_version() -> int:
    """
    Find tensorflow's minor version
    Returns
        minor_version (int)
    """
    return int(tf.__version__.split(".", maxsplit=-1)[1])


def validate_for_keras3():
    tf_major = get_tf_major_version()
    tf_minor = get_tf_minor_version()

    # tf_keras is a must dependency after tf 2.16
    if tf_major == 1 or (tf_major == 2 and tf_minor < 16):
        return

    try:
        import tf_keras

        logger.debug(f"tf_keras is already available - {tf_keras.__version__}")
    except ImportError as err:
        # you may consider to install that package here
        raise ValueError(
            f"You have tensorflow {tf.__version__} and this requires "
            "tf-keras package. Please run `pip install tf-keras` "
            "or downgrade your tensorflow."
        ) from err