#!/usr/bin/env python
"""
Copyright 2014 Tuenti Technologies S.L.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""


class CommitMessage(object):

    def __init__(self, message, values={}):
        self.message = message
        self.values = values

    def __str__(self):
        return self.message % self.values


class DefaultCommitMessageBuilder(object):
    CLOSE_BRANCH = "Closing branch %(branch)s"
    MERGE = "Merging %(other_branch)s@%(other_revision)s into " +\
        "%(local_branch)s@%(local_revision)s"

    def commit_message(self, message, values={}):
        return CommitMessage(message, values)

    def commit(self, message, values={}):
        if isinstance(message, CommitMessage):
            return message
        else:
            return self.commit_message(message)

    def close_branch(self, branch):
        return self.commit_message(self.CLOSE_BRANCH, {
            'branch': branch
        })

    def merge(self, local_branch=None, local_revision=None, other_branch=None,
              other_revision=None):
        return self.commit_message(self.MERGE, {
            'local_branch': local_branch or "",
            'local_revision': local_revision or "",
            'other_branch': other_branch or "",
            'other_revision': other_revision or "",
        })
