"""Definition Key is a chart definition_key created as a string from {platform}_{type}_{frequency}
related to a specific chart. """
from typing import List, Dict, Tuple, Optional

from charts.constants.common import DEFAULT_CHART_DEFINITION_KEY_ORDERED_MAPPINGS, \
    DEFAULT_CHART_DEFINITION_KEY_SEPARATOR


def _create_chart_definition_key(
        data: Dict[str, str],
        keys_to_build_from: Tuple = DEFAULT_CHART_DEFINITION_KEY_ORDERED_MAPPINGS,
        separator: Optional[str] = None):
    """Get a dict object and create a chart definition key

    Args:
        data: Single chart data item

    Returns:
        String

        data example:
            {
            "type": "regional",
            "platform": "spotify",
            "target": "track",
            "frequency": "daily",
        }
        result example:
            "spotify_regional_daily"

    """

    if not separator:
        separator = DEFAULT_CHART_DEFINITION_KEY_SEPARATOR

    return f"{separator}".join([data[key].replace(" ", "").lower() for key in keys_to_build_from])


def split_definition_key(definition_key: str, lower_values: bool = True, separator: str = "_") -> List[str]:
    """Split a chart definition key and return a dict with key values of a definition key is created from

    Args:
        definition_key: a chart definition_key like "spotify_viral_daily", "apple_default_daily" ... e.t.c
        lower_values: to lower the values of a split definition_key array while mapping
        separator: separator used to split the definition_key into values

    Returns:
        List of strings with order of values like [platform, type, frequency]
    """

    return (definition_key.lower() if lower_values else definition_key).split(separator)