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#
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from enum import Enum


class Strategy(Enum):
    """
    An enum that defines the distribution strategy.

    The following strategies are supported:

    - NONE: No distribution strategy, depends on the underlying system's allocation.
    - HASH: Uses the hash value of the expression to distribute data.
    - RANGE: Uses the specified range of the expression to distribute data.
    - EVEN: Distributes data evenly across partitions.
    """

    NONE = "NONE"
    HASH = "HASH"
    RANGE = "RANGE"
    EVEN = "EVEN"

    @staticmethod
    def get_by_name(name: str) -> "Strategy":
        upper_name = name.upper()
        if upper_name == "NONE":
            return Strategy.NONE
        if upper_name == "HASH":
            return Strategy.HASH
        if upper_name == "RANGE":
            return Strategy.RANGE
        if upper_name in {"EVEN", "RANDOM"}:
            return Strategy.EVEN
        raise ValueError(
            f"Invalid distribution strategy: {name}. Valid values are: {[s.value for s in Strategy]}"
        )
