# Copyright (C) 2006, 2007, 2009-2012 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA


import os

from bzrlib.tests import TestCaseWithTransport
from bzrlib.workingtree import WorkingTree


class TestRemerge(TestCaseWithTransport):

    def make_file(self, name, contents):
        with open(name, 'wb') as f:
            f.write(contents)

    def create_conflicts(self):
        """Create a conflicted tree"""
        os.mkdir('base')
        self.make_file('base/hello', "hi world")
        self.make_file('base/answer', "42")
        self.run_bzr('init', working_dir='base')
        self.run_bzr('add', working_dir='base')
        self.run_bzr('commit -m base', working_dir='base')
        self.run_bzr('branch base other')
        self.run_bzr('branch base this')
        self.make_file('other/hello', "Hello.")
        self.make_file('other/answer', "Is anyone there?")
        self.run_bzr('commit -m other', working_dir='other')
        self.make_file('this/hello', "Hello, world")
        self.run_bzr('mv answer question', working_dir='this')
        self.make_file('this/question',
                       "What do you get when you multiply sixtimes nine?")
        self.run_bzr('commit -m this', working_dir='this')

    def test_remerge(self):
        """Remerge command works as expected"""
        self.create_conflicts()
        self.run_bzr('merge ../other --show-base',
                     retcode=1, working_dir='this')
        conflict_text = open('this/hello').read()
        self.assertTrue('|||||||' in conflict_text)
        self.assertTrue('hi world' in conflict_text)

        self.run_bzr_error(['conflicts encountered'], 'remerge',
                           retcode=1, working_dir='this')
        with open('this/hello') as f:
            conflict_text = f.read()
        self.assertFalse('|||||||' in conflict_text)
        self.assertFalse('hi world' in conflict_text)

        os.unlink('this/hello.OTHER')
        os.unlink('this/question.OTHER')

        self.run_bzr_error(['jello is not versioned'],
                     'remerge jello --merge-type weave', working_dir='this')
        self.run_bzr_error(['conflicts encountered'],
                           'remerge hello --merge-type weave',
                           retcode=1, working_dir='this')

        self.assertPathExists('this/hello.OTHER')
        self.assertPathDoesNotExist('this/question.OTHER')

        file_id = self.run_bzr('file-id hello', working_dir='this')[0]
        self.run_bzr_error(['hello.THIS is not versioned'],
                           'file-id hello.THIS', working_dir='this')

        self.run_bzr_error(['conflicts encountered'],
                           'remerge --merge-type weave',
                           retcode=1, working_dir='this')

        self.assertPathExists('this/hello.OTHER')
        self.assertTrue('this/hello.BASE')
        with open('this/hello') as f:
            conflict_text = f.read()
        self.assertFalse('|||||||' in conflict_text)
        self.assertFalse('hi world' in conflict_text)

        self.run_bzr_error(['Showing base is not supported.*Weave'],
                           'remerge . --merge-type weave --show-base',
                           working_dir='this')
        self.run_bzr_error(["Can't reprocess and show base"],
                           'remerge . --show-base --reprocess',
                           working_dir='this')
        self.run_bzr_error(['conflicts encountered'],
                           'remerge . --merge-type weave --reprocess',
                           retcode=1, working_dir='this')
        self.run_bzr_error(['conflicts encountered'],
                           'remerge hello --show-base',
                           retcode=1, working_dir='this')
        self.run_bzr_error(['conflicts encountered'],
                           'remerge hello --reprocess',
                           retcode=1, working_dir='this')

        self.run_bzr('resolve --all', working_dir='this')
        self.run_bzr('commit -m done', working_dir='this')

        self.run_bzr_error(['remerge only works after normal merges',
                            'Not cherrypicking or multi-merges'],
                           'remerge', working_dir='this')

    def test_conflicts(self):
        self.create_conflicts()
        self.run_bzr('merge ../other', retcode=1, working_dir='this')
        wt = WorkingTree.open('this')
        self.assertEqual(2, len(wt.conflicts()))
        self.run_bzr('remerge', retcode=1, working_dir='this')
        wt = WorkingTree.open('this')
        self.assertEqual(2, len(wt.conflicts()))
        self.run_bzr('remerge hello', retcode=1, working_dir='this')
        wt = WorkingTree.open('this')
        self.assertEqual(2, len(wt.conflicts()))
