from common.constants.region import UserRegion


class RegionHandler:
    def __init__(self):
        self._zh_cn_patterns = [".cn", "cn.", "host"]

    def detect_from_host(self, host: str) -> UserRegion:
        # Now we set user preferred region based on host
        for parttern in self._zh_cn_patterns:
            if parttern in host.lower():
                return UserRegion.ZH_CN
        return UserRegion.OTHER