# Copyright (c) 2009, Rotem Yaari <vmalloc@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of organization nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY Rotem Yaari ''AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL Rotem Yaari BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import re
from ref import Ref

class Branch(Ref):
    def delete(self):
        raise NotImplementedError()
    def __repr__(self):
        return "<branch %s>" % (self.name,)
class LocalBranch(Branch):
    def delete(self, force = True):
        self.repo._executeGitCommandAssertSuccess("branch -%s %s" % ("D" if force else "d", self.name,))
    def setRemoteBranch(self, branch):
        if branch is None:
            self.repo.config.unsetParameter('branch.%s.remote' % self.name)
            self.repo.config.unsetParameter('branch.%s.merge' % self.name)
            return
        elif not isinstance(branch, RegisteredRemoteBranch):
            raise ValueError("Remote branch must be a remote branch object (got %r)" % (branch,))
        self.repo.config.setParameter('branch.%s.remote' % self.name, branch.remote.name)
        self.repo.config.setParameter('branch.%s.merge' % self.name, 'refs/heads/%s' % branch.name)
    def getRemoteBranch(self):
        remote = self.repo.config.getParameter('branch.%s.remote' % self.name)
        if remote is None:
            return None
        remote = self.repo.getRemoteByName(remote)
        merge = self.repo.config.getParameter('branch.%s.merge' % self.name)
        merge = re.sub('^refs/heads/', '', merge)
        remote_branch = remote.getBranchByName(merge)
        return remote_branch

class LocalBranchAlias(LocalBranch):
    def __init__(self, repository, name, dest):
        super(LocalBranchAlias, self).__init__(repository, name)
        self.dest = dest

class RemoteBranch(Branch):
    pass
class RegisteredRemoteBranch(RemoteBranch):
    def __init__(self, repo, remote, name):
        super(RegisteredRemoteBranch, self).__init__(repo, name)
        self.remote = remote
    def getHead(self):
        return self.repo._getCommitByRefName("%s/%s" % (self.remote.name, self.name))
    def delete(self):
        """
        Deletes the actual branch on the remote repository!
        """
        self.repo.push(self.remote, fromBranch = "", toBranch = self, force = True)
    def getNormalizedName(self):
        return "%s/%s" % (self.remote.name, self.name)
    def __repr__(self):
        return "<branch %s on remote %r>" % (self.name, self.remote.name)