# Copyright (C) 2008 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import os

from bzrlib import pack, shelf, tests, transform


class TestPrepareShelf(tests.TestCaseWithTransport):

    def test_shelve_rename(self):
        tree = self.make_branch_and_tree('.')
        self.build_tree(['foo'])
        tree.add(['foo'], ['foo-id'])
        tree.commit('foo')
        tree.rename_one('foo', 'bar')
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        self.assertEqual([('rename', 'foo-id', 'foo', 'bar')], list(creator))
        creator.shelve_rename('foo-id')
        work_trans_id = creator.work_transform.trans_id_file_id('foo-id')
        self.assertEqual('foo', creator.work_transform.final_name(
                         work_trans_id))
        shelf_trans_id = creator.shelf_transform.trans_id_file_id('foo-id')
        self.assertEqual('bar', creator.shelf_transform.final_name(
                         shelf_trans_id))

    def test_shelve_move(self):
        tree = self.make_branch_and_tree('.')
        self.build_tree(['foo/', 'bar/', 'foo/baz'])
        tree.add(['foo', 'bar', 'foo/baz'], ['foo-id', 'bar-id', 'baz-id'])
        tree.commit('foo')
        tree.rename_one('foo/baz', 'bar/baz')
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        self.assertEqual([('rename', 'baz-id', 'foo/baz', 'bar/baz')],
                         list(creator))
        creator.shelve_rename('baz-id')
        work_trans_id = creator.work_transform.trans_id_file_id('baz-id')
        work_foo = creator.work_transform.trans_id_file_id('foo-id')
        self.assertEqual(work_foo, creator.work_transform.final_parent(
                         work_trans_id))
        shelf_trans_id = creator.shelf_transform.trans_id_file_id('baz-id')
        shelf_bar = creator.shelf_transform.trans_id_file_id('bar-id')
        self.assertEqual(shelf_bar, creator.shelf_transform.final_parent(
                         shelf_trans_id))
        creator.transform()
        self.assertEqual('foo/baz', tree.id2path('baz-id'))

    def assertShelvedFileEqual(self, expected_content, creator, file_id):
        s_trans_id = creator.shelf_transform.trans_id_file_id(file_id)
        shelf_file = creator.shelf_transform._limbo_name(s_trans_id)
        self.assertFileEqual(expected_content, shelf_file)

    def test_shelve_content_change(self):
        tree = self.make_branch_and_tree('.')
        tree.lock_write()
        self.addCleanup(tree.unlock)
        self.build_tree_contents([('foo', 'a\n')])
        tree.add('foo', 'foo-id')
        tree.commit('Committed foo')
        self.build_tree_contents([('foo', 'b\na\nc\n')])
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        self.assertEqual([('modify text', 'foo-id')], list(creator))
        creator.shelve_lines('foo-id', ['a\n', 'c\n'])
        creator.transform()
        self.assertFileEqual('a\nc\n', 'foo')
        self.assertShelvedFileEqual('b\na\n', creator, 'foo-id')

    def test_shelve_creation(self):
        tree = self.make_branch_and_tree('.')
        tree.lock_write()
        self.addCleanup(tree.unlock)
        tree.commit('Empty tree')
        self.build_tree_contents([('foo', 'a\n'), ('bar/',)])
        tree.add(['foo', 'bar'], ['foo-id', 'bar-id'])
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        self.assertEqual([('add file', 'bar-id', 'directory', 'bar'),
                          ('add file', 'foo-id', 'file', 'foo')],
                          sorted(list(creator)))
        creator.shelve_creation('foo-id')
        creator.shelve_creation('bar-id')
        creator.transform()
        self.assertRaises(StopIteration,
                          tree.iter_entries_by_dir(['foo-id']).next)
        s_trans_id = creator.shelf_transform.trans_id_file_id('foo-id')
        self.assertEqual('foo-id',
                         creator.shelf_transform.final_file_id(s_trans_id))
        self.failIfExists('foo')
        self.failIfExists('bar')
        self.assertShelvedFileEqual('a\n', creator, 'foo-id')
        s_bar_trans_id = creator.shelf_transform.trans_id_file_id('bar-id')
        self.assertEqual('directory',
            creator.shelf_transform.final_kind(s_bar_trans_id))

    def test_shelve_symlink_creation(self):
        self.requireFeature(tests.SymlinkFeature)
        tree = self.make_branch_and_tree('.')
        tree.lock_write()
        self.addCleanup(tree.unlock)
        tree.commit('Empty tree')
        os.symlink('bar', 'foo')
        tree.add('foo', 'foo-id')
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        self.assertEqual([('add file', 'foo-id', 'symlink', 'foo')],
                         list(creator))
        creator.shelve_creation('foo-id')
        creator.transform()
        s_trans_id = creator.shelf_transform.trans_id_file_id('foo-id')
        self.failIfExists('foo')
        limbo_name = creator.shelf_transform._limbo_name(s_trans_id)
        self.assertEqual('bar', os.readlink(limbo_name))

    def test_shelve_creation_no_contents(self):
        tree = self.make_branch_and_tree('.')
        tree.lock_write()
        self.addCleanup(tree.unlock)
        tree.commit('Empty tree')
        self.build_tree(['foo'])
        tree.add('foo', 'foo-id')
        os.unlink('foo')
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        self.assertEqual([('add file', 'foo-id', None, 'foo')],
                         sorted(list(creator)))
        creator.shelve_creation('foo-id')
        creator.transform()
        self.assertRaises(StopIteration,
                          tree.iter_entries_by_dir(['foo-id']).next)
        self.assertShelvedFileEqual('', creator, 'foo-id')
        s_trans_id = creator.shelf_transform.trans_id_file_id('foo-id')
        self.assertEqual('foo-id',
                         creator.shelf_transform.final_file_id(s_trans_id))
        self.failIfExists('foo')

    def test_shelve_deletion(self):
        tree = self.make_branch_and_tree('tree')
        tree.lock_write()
        self.addCleanup(tree.unlock)
        self.build_tree_contents([('tree/foo/',), ('tree/foo/bar', 'baz')])
        tree.add(['foo', 'foo/bar'], ['foo-id', 'bar-id'])
        tree.commit('Added file and directory')
        tree.unversion(['foo-id', 'bar-id'])
        os.unlink('tree/foo/bar')
        os.rmdir('tree/foo')
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        self.assertEqual([('delete file', 'bar-id', 'file', 'foo/bar'),
                          ('delete file', 'foo-id', 'directory', 'foo')],
                          sorted(list(creator)))
        creator.shelve_deletion('foo-id')
        creator.shelve_deletion('bar-id')
        creator.transform()
        self.assertTrue('foo-id' in tree)
        self.assertTrue('bar-id' in tree)
        self.assertFileEqual('baz', 'tree/foo/bar')

    def test_shelve_delete_contents(self):
        tree = self.make_branch_and_tree('tree')
        self.build_tree(['tree/foo',])
        tree.add('foo', 'foo-id')
        tree.commit('Added file and directory')
        os.unlink('tree/foo')
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        self.assertEqual([('delete file', 'foo-id', 'file', 'foo')],
                         sorted(list(creator)))
        creator.shelve_deletion('foo-id')
        creator.transform()
        self.failUnlessExists('tree/foo')

    def test_shelve_change_kind(self):
        tree = self.make_branch_and_tree('tree')
        self.build_tree_contents([('tree/foo', 'bar')])
        tree.add('foo', 'foo-id')
        tree.commit('Added file and directory')
        os.unlink('tree/foo')
        os.mkdir('tree/foo')
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        self.assertEqual([('change kind', 'foo-id', 'file', 'directory',
                           'foo')], sorted(list(creator)))
        creator.shelve_content_change('foo-id')
        creator.transform()
        self.assertFileEqual('bar', 'tree/foo')
        s_trans_id = creator.shelf_transform.trans_id_file_id('foo-id')
        self.assertEqual('directory',
                         creator.shelf_transform._new_contents[s_trans_id])

    def test_shelve_unversion(self):
        tree = self.make_branch_and_tree('tree')
        self.build_tree(['tree/foo',])
        tree.add('foo', 'foo-id')
        tree.commit('Added file and directory')
        tree.unversion(['foo-id'])
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        self.assertEqual([('delete file', 'foo-id', 'file', 'foo')],
                         sorted(list(creator)))
        creator.shelve_deletion('foo-id')
        creator.transform()
        self.failUnlessExists('tree/foo')

    def test_write_shelf(self):
        tree = self.make_branch_and_tree('tree')
        self.build_tree(['tree/foo'])
        tree.add('foo', 'foo-id')
        creator = shelf.ShelfCreator(tree, tree.basis_tree())
        self.addCleanup(creator.finalize)
        list(creator)
        creator.shelve_creation('foo-id')
        filename = creator.write_shelf()
        self.assertContainsRe(filename, 'tree/.shelf2/01$')
        self.failUnlessExists(filename)
        parser = pack.ContainerPushParser()
        shelf_file = open(filename, 'rb')
        try:
            parser.accept_bytes(shelf_file.read())
        finally:
            shelf_file.close()
        tt = transform.TransformPreview(tree)
        self.addCleanup(tt.finalize)
        tt.deserialize(iter(parser.read_pending_records()))