# Copyright (C) 2007-2010 Canonical Ltd
# -*- coding: utf-8 -*-
#
# 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


"""Tests for the switch command of bzr."""

import os

from bzrlib import osutils
from bzrlib.workingtree import WorkingTree
from bzrlib.tests.blackbox import ExternalBase
from bzrlib.directory_service import directories


class TestSwitch(ExternalBase):

    def _create_sample_tree(self):
        tree = self.make_branch_and_tree('branch-1')
        self.build_tree(['branch-1/file-1', 'branch-1/file-2'])
        tree.add('file-1')
        tree.commit('rev1')
        tree.add('file-2')
        tree.commit('rev2')
        return tree

    def test_switch_up_to_date_light_checkout(self):
        self.make_branch_and_tree('branch')
        self.run_bzr('branch branch branch2')
        self.run_bzr('checkout --lightweight branch checkout')
        os.chdir('checkout')
        out, err = self.run_bzr('switch ../branch2')
        self.assertContainsRe(err, 'Tree is up to date at revision 0.\n')
        self.assertContainsRe(err, 'Switched to branch: .*/branch2.\n')
        self.assertEqual('', out)

    def test_switch_out_of_date_light_checkout(self):
        self.make_branch_and_tree('branch')
        self.run_bzr('branch branch branch2')
        self.build_tree(['branch2/file'])
        self.run_bzr('add branch2/file')
        self.run_bzr('commit -m add-file branch2')
        self.run_bzr('checkout --lightweight branch checkout')
        os.chdir('checkout')
        out, err = self.run_bzr('switch ../branch2')
        #self.assertContainsRe(err, '\+N  file')
        self.assertContainsRe(err, 'Updated to revision 1.\n')
        self.assertContainsRe(err, 'Switched to branch: .*/branch2.\n')
        self.assertEqual('', out)

    def _test_switch_nick(self, lightweight):
        """Check that the nick gets switched too."""
        tree1 = self.make_branch_and_tree('branch1')
        tree2 = self.make_branch_and_tree('branch2')
        tree2.pull(tree1.branch)
        checkout =  tree1.branch.create_checkout('checkout',
            lightweight=lightweight)
        self.assertEqual(checkout.branch.nick, tree1.branch.nick)
        self.assertEqual(checkout.branch.get_config().has_explicit_nickname(),
            False)
        self.run_bzr('switch branch2', working_dir='checkout')

        # we need to get the tree again, otherwise we don't get the new branch
        checkout = WorkingTree.open('checkout')
        self.assertEqual(checkout.branch.nick, tree2.branch.nick)
        self.assertEqual(checkout.branch.get_config().has_explicit_nickname(),
            False)

    def test_switch_nick(self):
        self._test_switch_nick(lightweight=False)

    def test_switch_nick_lightweight(self):
        self._test_switch_nick(lightweight=True)

    def _test_switch_explicit_nick(self, lightweight):
        """Check that the nick gets switched too."""
        tree1 = self.make_branch_and_tree('branch1')
        tree2 = self.make_branch_and_tree('branch2')
        tree2.pull(tree1.branch)
        checkout =  tree1.branch.create_checkout('checkout',
            lightweight=lightweight)
        self.assertEqual(checkout.branch.nick, tree1.branch.nick)
        checkout.branch.nick = "explicit_nick"
        self.assertEqual(checkout.branch.nick, "explicit_nick")
        self.assertEqual(checkout.branch.get_config()._get_explicit_nickname(),
            "explicit_nick")
        self.run_bzr('switch branch2', working_dir='checkout')

        # we need to get the tree again, otherwise we don't get the new branch
        checkout = WorkingTree.open('checkout')
        self.assertEqual(checkout.branch.nick, tree2.branch.nick)
        self.assertEqual(checkout.branch.get_config()._get_explicit_nickname(),
            tree2.branch.nick)

    def test_switch_explicit_nick(self):
        self._test_switch_explicit_nick(lightweight=False)

    def test_switch_explicit_nick_lightweight(self):
        self._test_switch_explicit_nick(lightweight=True)

    def test_switch_finds_relative_branch(self):
        """Switch will find 'foo' relative to the branch the checkout is of."""
        self.build_tree(['repo/'])
        tree1 = self.make_branch_and_tree('repo/brancha')
        tree1.commit('foo')
        tree2 = self.make_branch_and_tree('repo/branchb')
        tree2.pull(tree1.branch)
        branchb_id = tree2.commit('bar')
        checkout =  tree1.branch.create_checkout('checkout', lightweight=True)
        self.run_bzr(['switch', 'branchb'], working_dir='checkout')
        self.assertEqual(branchb_id, checkout.last_revision())
        checkout = checkout.bzrdir.open_workingtree()
        self.assertEqual(tree2.branch.base, checkout.branch.base)

    def test_switch_finds_relative_bound_branch(self):
        """Using switch on a heavy checkout should find master sibling

        The behaviour of lighweight and heavy checkouts should be
        consistentwhen using the convenient "switch to sibling" feature
        Both should switch to a sibling of the branch
        they are bound to, and not a sibling of themself"""

        self.build_tree(['repo/',
                         'heavyco/'])
        tree1 = self.make_branch_and_tree('repo/brancha')
        tree1.commit('foo')
        tree2 = self.make_branch_and_tree('repo/branchb')
        tree2.pull(tree1.branch)
        branchb_id = tree2.commit('bar')
        checkout = tree1.branch.create_checkout('heavyco/a', lightweight=False)
        self.run_bzr(['switch', 'branchb'], working_dir='heavyco/a')
        self.assertEqual(branchb_id, checkout.last_revision())
        self.assertEqual(tree2.branch.base, checkout.branch.get_bound_location())

    def test_switch_revision(self):
        tree = self._create_sample_tree()
        checkout = tree.branch.create_checkout('checkout', lightweight=True)
        self.run_bzr(['switch', 'branch-1', '-r1'], working_dir='checkout')
        self.failUnlessExists('checkout/file-1')
        self.failIfExists('checkout/file-2')

    def test_switch_only_revision(self):
        tree = self._create_sample_tree()
        checkout = tree.branch.create_checkout('checkout', lightweight=True)
        self.failUnlessExists('checkout/file-1')
        self.failUnlessExists('checkout/file-2')
        self.run_bzr(['switch', '-r1'], working_dir='checkout')
        self.failUnlessExists('checkout/file-1')
        self.failIfExists('checkout/file-2')
        # Check that we don't accept a range
        self.run_bzr_error(
            ['bzr switch --revision takes exactly one revision identifier'],
            ['switch', '-r0..2'], working_dir='checkout')

    def prepare_lightweight_switch(self):
        branch = self.make_branch('branch')
        branch.create_checkout('tree', lightweight=True)
        osutils.rename('branch', 'branch1')

    def test_switch_lightweight_after_branch_moved(self):
        self.prepare_lightweight_switch()
        self.run_bzr('switch --force ../branch1', working_dir='tree')
        branch_location = WorkingTree.open('tree').branch.base
        self.assertEndsWith(branch_location, 'branch1/')

    def test_switch_lightweight_after_branch_moved_relative(self):
        self.prepare_lightweight_switch()
        self.run_bzr('switch --force branch1', working_dir='tree')
        branch_location = WorkingTree.open('tree').branch.base
        self.assertEndsWith(branch_location, 'branch1/')

    def test_create_branch_no_branch(self):
        self.prepare_lightweight_switch()
        self.run_bzr_error(['cannot create branch without source branch'],
            'switch --create-branch ../branch2', working_dir='tree')

    def test_create_branch(self):
        branch = self.make_branch('branch')
        tree = branch.create_checkout('tree', lightweight=True)
        tree.commit('one', rev_id='rev-1')
        self.run_bzr('switch --create-branch ../branch2', working_dir='tree')
        tree = WorkingTree.open('tree')
        self.assertEndsWith(tree.branch.base, '/branch2/')

    def test_create_branch_local(self):
        branch = self.make_branch('branch')
        tree = branch.create_checkout('tree', lightweight=True)
        tree.commit('one', rev_id='rev-1')
        self.run_bzr('switch --create-branch branch2', working_dir='tree')
        tree = WorkingTree.open('tree')
        # The new branch should have been created at the same level as
        # 'branch', because we did not have a '/' segment
        self.assertEqual(branch.base[:-1] + '2/', tree.branch.base)

    def test_create_branch_short_name(self):
        branch = self.make_branch('branch')
        tree = branch.create_checkout('tree', lightweight=True)
        tree.commit('one', rev_id='rev-1')
        self.run_bzr('switch -b branch2', working_dir='tree')
        tree = WorkingTree.open('tree')
        # The new branch should have been created at the same level as
        # 'branch', because we did not have a '/' segment
        self.assertEqual(branch.base[:-1] + '2/', tree.branch.base)

    def test_create_branch_directory_services(self):
        branch = self.make_branch('branch')
        tree = branch.create_checkout('tree', lightweight=True)
        class FooLookup(object):
            def look_up(self, name, url):
                return 'foo-'+name
        directories.register('foo:', FooLookup, 'Create branches named foo-')
        self.addCleanup(directories.remove, 'foo:')
        self.run_bzr('switch -b foo:branch2', working_dir='tree')
        tree = WorkingTree.open('tree')
        self.assertEndsWith(tree.branch.base, 'foo-branch2/')

    def test_switch_with_post_switch_hook(self):
        from bzrlib import branch as _mod_branch
        calls = []
        _mod_branch.Branch.hooks.install_named_hook('post_switch',
            calls.append, None)
        self.make_branch_and_tree('branch')
        self.run_bzr('branch branch branch2')
        self.run_bzr('checkout branch checkout')
        os.chdir('checkout')
        self.assertLength(0, calls)
        out, err = self.run_bzr('switch ../branch2')
        self.assertLength(1, calls)

    def test_switch_lightweight_co_with_post_switch_hook(self):
        from bzrlib import branch as _mod_branch
        calls = []
        _mod_branch.Branch.hooks.install_named_hook('post_switch',
            calls.append, None)
        self.make_branch_and_tree('branch')
        self.run_bzr('branch branch branch2')
        self.run_bzr('checkout --lightweight branch checkout')
        os.chdir('checkout')
        self.assertLength(0, calls)
        out, err = self.run_bzr('switch ../branch2')
        self.assertLength(1, calls)