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import csv
from enum import Enum

class Difficulty(Enum):
    Terrible = -2
    Low = -1
    Moderate = 0
    High = 1
    Extreme = 2

    @classmethod
    def from_str(cls, name):
        name = name.strip().lower()
        for member in cls:
            if member.name.lower() == name:
                return member
        raise ValueError(f"{name!r} is not a valid {cls.__name__}")


def load_csv(name, value_parser=None):
    if value_parser is None:
        value_parser = lambda x:x
    res = dict() # Table by level and Difficulty
    with open(f"creature_stats/{name}.csv", newline='', encoding='utf8') as file:
        reader = csv.DictReader(file)
        for row in reader:
            level = int(row.pop("Level"))
            res[level] = {Difficulty.from_str(name):
                value_parser(val) for name,val in row.items()}
    return res

def parse_range(str_data):
    try:
        value = int(str_data)
        return (value, value)
    except ValueError:
        return tuple([int(i) for i in str_data.split("-")[:2]])

class StatsDB:
    def __init__(self) -> None:
        self.ac = load_csv("ac", int)
        self.saves = load_csv("saves", int)
        self.hp = load_csv("hp", parse_range)

stats = StatsDB()

# if __name__ == '__main__':
#     main()