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import logging

from webkitpy.tool.grammar import pluralize
from webkitpy.tool.steps.abstractstep import AbstractStep
from webkitpy.tool.steps.options import Options

_log = logging.getLogger(__name__)


class ObsoletePatches(AbstractStep):
    @classmethod
    def options(cls):
        return AbstractStep.options() + [
            Options.obsolete_patches,
        ]

    def run(self, state):
        if not self._options.obsolete_patches:
            return
        bug_id = state["bug_id"]
        bug = self._tool.bugs.fetch_bug(bug_id)
        if not bug:
            return
        patches = bug.patches()
        if not patches:
            return
        _log.info("Obsoleting %s on bug %s" % (pluralize(len(patches), "old patch"), bug_id))
        for patch in patches:
            self._tool.bugs.obsolete_attachment(patch.id())