# Copyright (C) 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

import os
import smtplib

from bzrlib import (
    gpg,
    merge_directive,
    tests,
    workingtree,
    )


EMAIL1 = """From: "J. Random Hacker" <jrandom@example.com>
Subject: bar
To: pqm@example.com
User-Agent: Bazaar \(.*\)

# Bazaar merge directive format 2 \\(Bazaar 0.90\\)
# revision_id: bar-id
# target_branch: ../tree2
# testament_sha1: .*
# timestamp: .*
# source_branch: .
#"""


class TestMergeDirective(tests.TestCaseWithTransport):

    def prepare_merge_directive(self):
        self.tree1 = self.make_branch_and_tree('tree1')
        self.build_tree_contents([('tree1/file', 'a\nb\nc\nd\n')])
        self.tree1.branch.get_config().set_user_option('email',
            'J. Random Hacker <jrandom@example.com>')
        self.tree1.add('file')
        self.tree1.commit('foo', rev_id='foo-id')
        self.tree2 = self.tree1.bzrdir.sprout('tree2').open_workingtree()
        self.build_tree_contents([('tree1/file', 'a\nb\nc\nd\ne\n')])
        self.tree1.commit('bar', rev_id='bar-id')
        os.chdir('tree1')
        return self.tree1, self.tree2

    def test_merge_directive(self):
        self.prepare_merge_directive()
        md_text = self.run_bzr('merge-directive ../tree2')[0]
        self.assertContainsRe(md_text, "\\+e")
        md_text = self.run_bzr('merge-directive -r -2 ../tree2')[0]
        self.assertNotContainsRe(md_text, "\\+e")
        md_text = self.run_bzr('merge-directive -r -1..-2 ../tree2')[0]
        md2 = merge_directive.MergeDirective.from_lines(
            md_text.splitlines(True))
        self.assertEqual('foo-id', md2.revision_id)
        self.assertEqual('bar-id', md2.base_revision_id)

    def test_submit_branch(self):
        self.prepare_merge_directive()
        self.run_bzr_error(('No submit branch',), 'merge-directive', retcode=3)
        self.run_bzr('merge-directive ../tree2')

    def test_public_branch(self):
        self.prepare_merge_directive()
        self.run_bzr_error(('No public branch',),
                           'merge-directive --diff ../tree2', retcode=3)
        md_text = self.run_bzr('merge-directive ../tree2')[0]
        self.assertNotContainsRe(md_text, 'source_branch:')
        self.run_bzr('merge-directive --diff ../tree2 .')
        self.run_bzr('merge-directive --diff')[0]
        self.assertNotContainsRe(md_text, 'source_branch:')

    def test_patch_types(self):
        self.prepare_merge_directive()
        md_text = self.run_bzr('merge-directive ../tree2')[0]
        self.assertContainsRe(md_text, "# Begin bundle")
        self.assertContainsRe(md_text, "\\+e")
        md_text = self.run_bzr('merge-directive ../tree2 --diff .')[0]
        self.assertNotContainsRe(md_text, "# Begin bundle")
        self.assertContainsRe(md_text, "\\+e")
        md_text = self.run_bzr('merge-directive --plain')[0]
        self.assertNotContainsRe(md_text, "\\+e")

    def test_message(self):
        self.prepare_merge_directive()
        md_text = self.run_bzr('merge-directive ../tree2')[0]
        self.assertNotContainsRe(md_text, 'message: Message for merge')
        md_text = self.run_bzr('merge-directive -m Message_for_merge')[0]
        self.assertContainsRe(md_text, 'message: Message_for_merge')

    def test_signing(self):
        self.prepare_merge_directive()
        old_strategy = gpg.GPGStrategy
        gpg.GPGStrategy = gpg.LoopbackGPGStrategy
        try:
            md_text = self.run_bzr('merge-directive --sign ../tree2')[0]
        finally:
            gpg.GPGStrategy = old_strategy
        self.assertContainsRe(md_text, '^-----BEGIN PSEUDO-SIGNED CONTENT')

    def run_bzr_fakemail(self, *args, **kwargs):
        sendmail_calls = []
        def sendmail(self, from_, to, message):
            sendmail_calls.append((self, from_, to, message))
        connect_calls = []
        def connect(self, host='localhost', port=0):
            connect_calls.append((self, host, port))
        def has_extn(self, extension):
            return False
        def ehlo(self):
            return (200, 'Ok')
        old_sendmail = smtplib.SMTP.sendmail
        smtplib.SMTP.sendmail = sendmail
        old_connect = smtplib.SMTP.connect
        smtplib.SMTP.connect = connect
        old_ehlo = smtplib.SMTP.ehlo
        smtplib.SMTP.ehlo = ehlo
        old_has_extn = smtplib.SMTP.has_extn
        smtplib.SMTP.has_extn = has_extn
        try:
            result = self.run_bzr(*args, **kwargs)
        finally:
            smtplib.SMTP.sendmail = old_sendmail
            smtplib.SMTP.connect = old_connect
            smtplib.SMTP.ehlo = old_ehlo
            smtplib.SMTP.has_extn = old_has_extn
        return result + (connect_calls, sendmail_calls)

    def test_mail_default(self):
        tree1, tree2 = self.prepare_merge_directive()
        md_text, errr, connect_calls, sendmail_calls =\
            self.run_bzr_fakemail(['merge-directive', '--mail-to',
                                   'pqm@example.com', '--plain', '../tree2',
                                   '.'])
        self.assertEqual('', md_text)
        self.assertEqual(1, len(connect_calls))
        call = connect_calls[0]
        self.assertEqual(('localhost', 0), call[1:3])
        self.assertEqual(1, len(sendmail_calls))
        call = sendmail_calls[0]
        self.assertEqual(('jrandom@example.com', ['pqm@example.com']),
                call[1:3])
        self.assertContainsRe(call[3], EMAIL1)

    def test_pull_raw(self):
        self.prepare_merge_directive()
        self.tree1.commit('baz', rev_id='baz-id')
        md_text = self.run_bzr(['merge-directive', self.tree2.basedir,
                                '-r', '2', self.tree1.basedir, '--plain'])[0]
        self.build_tree_contents([('../directive', md_text)])
        os.chdir('../tree2')
        self.run_bzr('pull ../directive')
        wt = workingtree.WorkingTree.open('.')
        self.assertEqual('bar-id', wt.last_revision())

    def test_pull_user_r(self):
        """If the user supplies -r, an error is emitted"""
        self.prepare_merge_directive()
        self.tree1.commit('baz', rev_id='baz-id')
        md_text = self.run_bzr(['merge-directive', self.tree2.basedir,
                                self.tree1.basedir, '--plain'])[0]
        self.build_tree_contents([('../directive', md_text)])
        os.chdir('../tree2')
        self.run_bzr_error(
            ('Cannot use -r with merge directives or bundles',),
            'pull -r 2 ../directive')

    def test_pull_bundle(self):
        self.prepare_merge_directive()
        self.tree1.commit('baz', rev_id='baz-id')
        md_text = self.run_bzr(['merge-directive', self.tree2.basedir,
                                '-r', '2', '/dev/null', '--bundle'])[0]
        self.build_tree_contents([('../directive', md_text)])
        os.chdir('../tree2')
        self.run_bzr('pull ../directive')
        wt = workingtree.WorkingTree.open('.')
        self.assertEqual('bar-id', wt.last_revision())

    def test_merge_raw(self):
        self.prepare_merge_directive()
        self.tree1.commit('baz', rev_id='baz-id')
        md_text = self.run_bzr(['merge-directive', self.tree2.basedir,
                                '-r', '2', self.tree1.basedir, '--plain'])[0]
        self.build_tree_contents([('../directive', md_text)])
        os.chdir('../tree2')
        self.run_bzr('merge ../directive')
        wt = workingtree.WorkingTree.open('.')
        self.assertEqual('bar-id', wt.get_parent_ids()[1])

    def test_merge_user_r(self):
        """If the user supplies -r, an error is emitted"""
        self.prepare_merge_directive()
        self.tree1.commit('baz', rev_id='baz-id')
        md_text = self.run_bzr(['merge-directive', self.tree2.basedir,
                                self.tree1.basedir, '--plain'])[0]
        self.build_tree_contents([('../directive', md_text)])
        os.chdir('../tree2')
        self.run_bzr_error(
            ('Cannot use -r with merge directives or bundles',),
            'merge -r 2 ../directive')

    def test_merge_bundle(self):
        self.prepare_merge_directive()
        self.tree1.commit('baz', rev_id='baz-id')
        md_text = self.run_bzr(['merge-directive', self.tree2.basedir,
                               '-r', '2', '/dev/null', '--bundle'])[0]
        self.build_tree_contents([('../directive', md_text)])
        os.chdir('../tree2')
        self.run_bzr('merge ../directive')
        wt = workingtree.WorkingTree.open('.')
        self.assertEqual('bar-id', wt.get_parent_ids()[1])

    def test_mail_uses_config(self):
        tree1, tree2 = self.prepare_merge_directive()
        tree1.branch.get_config().set_user_option('smtp_server', 'bogushost')
        md_text, errr, connect_calls, sendmail_calls =\
            self.run_bzr_fakemail('merge-directive --mail-to'
                                  ' pqm@example.com --plain ../tree2 .')
        call = connect_calls[0]
        self.assertEqual(('bogushost', 0), call[1:3])

    def test_no_common_ancestor(self):
        foo = self.make_branch_and_tree('foo')
        foo.commit('rev1')
        bar = self.make_branch_and_tree('bar')
        os.chdir('foo')
        self.run_bzr('merge-directive ../bar')

    def test_no_commits(self):
        foo = self.make_branch_and_tree('foo')
        bar = self.make_branch_and_tree('bar')
        os.chdir('foo')
        self.run_bzr_error(('No revisions to bundle.', ),
                            'merge-directive ../bar')

    def test_encoding_exact(self):
        tree1, tree2 = self.prepare_merge_directive()
        tree1.commit(u'messag\xe9')
        self.run_bzr('merge-directive ../tree2') # no exception raised
