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import csv

from game import Difficulty, RollInfo

def safe_item_level(creature_level: int):
    if creature_level <= 3:
        return 0
    if creature_level == 4:
        return 1
    return creature_level - 4

def load_csv(name, value_parser=None):
    def parse_col_name(name):
        try:
            return Difficulty.from_str(name)
        except ValueError:
            return name.lower()

    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] = {parse_col_name(name):
                value_parser(val) for name,val in row.items()}
    return res

def parse_stat(str_data):
    try:
        return int(str_data)
    except ValueError:
        pass

    separator = "-"
    if separator in str_data:
        # parse range
        values = [int(i) for i in str_data.split(separator)[:2]]
        return tuple((min(*values), max(*values)))
    else:
        return RollInfo.parse(str_data)


class StatsDB:
    stat_names = ["ac","abilities","attack_bonus", "hp",
        "perception", "saves", "resistances", "skills", "strike_damage"]

    def __init__(self) -> None:
        self.stats = dict()
        for stat_name in StatsDB.stat_names:
            self.stats[stat_name] = load_csv(stat_name, parse_stat)
        self.stats["resistances"] = {k:(v["minimum"], v["maximum"])
                for k,v in self.stats["resistances"].items()}

stats = StatsDB()

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