import re
from typing import Any, Dict


class AbstractAlertMatcher:
    def __init__(self, label: str, value: str, op: str) -> None:
        self.label = label
        self.value = value
        self._op = op

    def match(self, labels: Dict[str, str]) -> bool:
        raise NotImplementedError

    def __str__(self) -> str:
        return f"{self.label}{self._op}{self.value}"

    def __eq__(self, matcher: Any) -> bool:
        return self.label == matcher.label and self.value == matcher.value


class AlertMatcher(AbstractAlertMatcher):
    def __init__(self, label: str, value: str) -> None:
        super().__init__(label, value, "=")

    def match(self, labels: Dict[str, str]) -> bool:
        return self.label in labels and self.value == labels[self.label]


class AlertRegexMatcher(AbstractAlertMatcher):
    def __init__(self, label: str, regex: str) -> None:
        super().__init__(label, regex, "=~")
        self.regex = re.compile(regex)

    def match(self, labels: Dict[str, str]) -> bool:
        return self.label in labels and self.regex.match(labels[self.label]) is not None