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from webkitpy.tool.bot.patchanalysistask import PatchAnalysisTask, PatchAnalysisTaskDelegate, UnableToApplyPatch, PatchIsNotValid


class EarlyWarningSystemTaskDelegate(PatchAnalysisTaskDelegate):
    pass


class EarlyWarningSystemTask(PatchAnalysisTask):
    def __init__(self, delegate, patch, should_run_tests=True):
        PatchAnalysisTask.__init__(self, delegate, patch)
        self._should_run_tests = should_run_tests

    def validate(self):
        self._patch = self._delegate.refetch_patch(self._patch)
        if self._patch.is_obsolete():
            return False
        if self._patch.bug().is_closed():
            return False
        if self._patch.review() == "-":
            return False
        return True

    def run(self):
        if not self.validate():
            raise PatchIsNotValid(self._patch)
        if not self._clean():
            return False
        if not self._update():
            return False
        if not self._apply():
            raise UnableToApplyPatch(self._patch)
        if not self._build():
            if not self._build_without_patch():
                return False
            return self.report_failure()
        if not self._should_run_tests:
            return True
        return self._test_patch()