import re


def combine_whitespaces(s: str) -> str:
    return re.compile(r"\s+").sub(" ", s).strip()


class QueryParams:
    def __init__(self, booru: str, tags: list[str], random: bool = True, limit: int = 10):
        self.booru = booru
        self.tags = tags
        self.random = random
        self.limit = limit

    @classmethod
    def from_query_str(cls, query: str):
        query = query.replace("hentai ", "")

        query = combine_whitespaces(query)

        list_ = query.split(" ")

        booru = list_[0]

        list_.remove(booru)

        tags = []
        random = False
        limit = 10

        for e in list_:
            if "random=" in e:  # this is 'random' argument
                random = e.replace("random=", "").lower() == "true"
                continue

            if "limit=" in e:  # this is 'limit' argument
                limit = int(e.replace("limit=", ""))
                continue

            tags.append(e)

        return cls(booru, tags, random, limit)

    def __str__(self):
        return "QueryParams(booru=" + self.booru + ", tags=" + str(self.tags) + ", random=" + str(self.random) + \
               ", limit=" + str(self.limit) + ")"