# Copyright (C) 2006, 2007 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

from bzrlib import (
    errors,
    tests,
    conflicts,
    )
from bzrlib.tests import TestSkipped
from bzrlib.tests.tree_implementations import TestCaseWithTree

class TestAnnotate(TestCaseWithTree):

    def test_annotate(self):
        work_tree = self.make_branch_and_tree('wt')
        tree = self.get_tree_no_parents_abc_content(work_tree)
        tree_revision = getattr(tree, 'get_revision_id', lambda: 'current:')()
        tree.lock_read()
        self.addCleanup(tree.unlock)
        for revision, line in tree.annotate_iter('a-id'):
            self.assertEqual('contents of a\n', line)
            self.assertEqual(tree_revision, revision)
        tree_revision = getattr(tree, 'get_revision_id', lambda: 'random:')()
        for revision, line in tree.annotate_iter('a-id', 'random:'):
            self.assertEqual('contents of a\n', line)
            self.assertEqual(tree_revision, revision)


class TestPlanFileMerge(TestCaseWithTree):

    def test_plan_file_merge(self):
        work_a = self.make_branch_and_tree('wta')
        self.build_tree_contents([('wta/file', 'a\nb\nc\nd\n')])
        work_a.add('file', 'file-id')
        work_a.commit('base version')
        work_b = work_a.bzrdir.sprout('wtb').open_workingtree()
        self.build_tree_contents([('wta/file', 'b\nc\nd\ne\n')])
        tree_a = self.workingtree_to_test_tree(work_a)
        tree_a.lock_read()
        self.addCleanup(tree_a.unlock)
        self.build_tree_contents([('wtb/file', 'a\nc\nd\nf\n')])
        tree_b = self.workingtree_to_test_tree(work_b)
        tree_b.lock_read()
        self.addCleanup(tree_b.unlock)
        self.assertEqual([
            ('killed-b', 'b\n'),
            ('killed-a', 'a\n'),
            ('unchanged', 'c\n'),
            ('unchanged', 'd\n'),
            ('new-a', 'e\n'),
            ('new-b', 'f\n'),
        ], list(tree_a.plan_file_merge('file-id', tree_b)))


class TestReference(TestCaseWithTree):

    def skip_if_no_reference(self, tree):
        if not getattr(tree, 'supports_tree_reference', lambda: False)():
            raise tests.TestSkipped('Tree references not supported')

    def create_nested(self):
        work_tree = self.make_branch_and_tree('wt')
        work_tree.lock_write()
        try:
            self.skip_if_no_reference(work_tree)
            subtree = self.make_branch_and_tree('wt/subtree')
            subtree.set_root_id('sub-root')
            subtree.commit('foo', rev_id='sub-1')
            work_tree.add_reference(subtree)
        finally:
            work_tree.unlock()
        tree = self._convert_tree(work_tree)
        self.skip_if_no_reference(tree)
        return tree

    def test_get_reference_revision(self):
        tree = self.create_nested()
        path = tree.id2path('sub-root')
        self.assertEqual('sub-1', tree.get_reference_revision('sub-root', path))

    def test_iter_references(self):
        tree = self.create_nested()
        tree.lock_read()
        self.addCleanup(tree.unlock)
        entry = tree.inventory['sub-root']
        self.assertEqual([(tree.abspath('subtree'), 'sub-root')],
            list(tree.iter_references()))

    def test_get_root_id(self):
        # trees should return some kind of root id; it can be none
        tree = self.make_branch_and_tree('tree')
        root_id = tree.get_root_id()
        if root_id is not None:
            self.assertIsInstance(root_id, str)


class TestFileIds(TestCaseWithTree):

    def test_id2path(self):
        # translate from file-id back to path
        work_tree = self.make_branch_and_tree('wt')
        tree = self.get_tree_no_parents_abc_content(work_tree)
        tree.lock_read()
        try:
            self.assertEqual(u'a', tree.id2path('a-id'))
            # other ids give an error- don't return None for this case
            self.assertRaises(errors.NoSuchId, tree.id2path, 'a')
        finally:
            tree.unlock()


class TestFileContent(TestCaseWithTree):

    def test_get_file(self):
        work_tree = self.make_branch_and_tree('wt')
        tree = self.get_tree_no_parents_abc_content_2(work_tree)
        tree.lock_read()
        try:
            # Test lookup without path works
            lines = tree.get_file('a-id').readlines()
            self.assertEqual(['foobar\n'], lines)
            # Test lookup with path works
            lines = tree.get_file('a-id', path='a').readlines()
            self.assertEqual(['foobar\n'], lines)
        finally:
            tree.unlock()


class TestExtractFilesBytes(TestCaseWithTree):

    def test_iter_files_bytes(self):
        work_tree = self.make_branch_and_tree('wt')
        self.build_tree_contents([('wt/foo', 'foo'),
                                  ('wt/bar', 'bar'),
                                  ('wt/baz', 'baz')])
        work_tree.add(['foo', 'bar', 'baz'], ['foo-id', 'bar-id', 'baz-id'])
        tree = self._convert_tree(work_tree)
        tree.lock_read()
        self.addCleanup(tree.unlock)
        extracted = dict((i, ''.join(b)) for i, b in
                         tree.iter_files_bytes([('foo-id', 'id1'),
                                                ('bar-id', 'id2'),
                                                ('baz-id', 'id3')]))
        self.assertEqual('foo', extracted['id1'])
        self.assertEqual('bar', extracted['id2'])
        self.assertEqual('baz', extracted['id3'])
        self.assertRaises(errors.NoSuchId, lambda: list(
                          tree.iter_files_bytes(
                          [('qux-id', 'file1-notpresent')])))


class TestConflicts(TestCaseWithTree):

    def test_conflicts(self):
        """Tree.conflicts() should return a ConflictList instance."""
        work_tree = self.make_branch_and_tree('wt')
        tree = self._convert_tree(work_tree)
        self.assertIsInstance(tree.conflicts(), conflicts.ConflictList)
