"""Get feature flags on backend."""
from flask import g
from pythonfeatures import pythonfeatures
from pythonfeatures.constants import split as split_constants

from ows_product_physical.api import app

OA_PHYSICAL_SUPPLY_CHAIN_METADATA_CARVED_IN = (
    'oa_physical_supply_chain_carved_in'
)
CCM_PHYSICAL_SUPPLYCHAININFO_OA = 'ccm_physical_supplychaininfo_oa'


def is_oa_physical_supply_chain_carved_in_enabled():
    """Check the OA_PHYSICAL_SUPPLY_CHAIN_METADATA_CARVED_IN flag.

    Returns:
        bool: whether flag is enabled.
    """
    return is_feature_flag_enabled(
        OA_PHYSICAL_SUPPLY_CHAIN_METADATA_CARVED_IN)


def is_ccm_physical_supplychaininfo_oa_enabled():
    """Check the CCM_PHYSICAL_SUPPLYCHAININFO_OA flag.

    Returns:
        bool: whether flag is enabled.
    """
    return is_feature_flag_enabled(
        CCM_PHYSICAL_SUPPLYCHAININFO_OA)


def is_feature_flag_enabled(flag_name):
    """Check if users requested feature flag is enabled.

    Args:
        flag_name (str): name of the flag to be checked.

    Returns:
        bool: whether feature is enabled
    """
    is_enabled = pythonfeatures.get_single_feature(
        flag_name, g.request_context
    ).message == split_constants.FEATURE_ENABLED

    app.logger.info(f'split {flag_name}: called with context_type '
                   f'{g.request_context} is {is_enabled}')
    return is_enabled