# -*- coding: utf-8 -*-

"""
 (c) 2018 - Copyright Red Hat Inc

 Authors:
   Pierre-Yves Chibon <pingou@pingoured.fr>

"""

from __future__ import unicode_literals, absolute_import

import json
import os
import re
import shutil
import sys
import tempfile
import time
import unittest

import pygit2
import wtforms
from mock import patch, MagicMock
from bs4 import BeautifulSoup

sys.path.insert(0, os.path.join(os.path.dirname(
    os.path.abspath(__file__)), '..'))

import pagure.lib.query
import tests
from pagure.lib.repo import PagureRepo
from pagure.lib.git import _make_signature


class PagureRemotePRtests(tests.Modeltests):
    """ Tests for remote PRs in pagure """

    def setUp(self):
        """ Set up the environment. """
        super(PagureRemotePRtests, self).setUp()

        self.newpath = tempfile.mkdtemp(prefix='pagure-fork-test')
        self.old_value = pagure.config.config['REMOTE_GIT_FOLDER']
        pagure.config.config['REMOTE_GIT_FOLDER'] = os.path.join(
            self.path, 'remotes')

    def tearDown(self):
        """ Clear things up. """
        super(PagureRemotePRtests, self).tearDown()

        pagure.config.config['REMOTE_GIT_FOLDER'] = self.old_value
        shutil.rmtree(self.newpath)

    def set_up_git_repo(self, new_project=None, branch_from='feature'):
        """ Set up the git repo and create the corresponding PullRequest
        object.
        """

        # Create a git repo to play with
        gitrepo = os.path.join(self.path, 'repos', 'test.git')
        repo = pygit2.init_repository(gitrepo, bare=True)

        repopath = os.path.join(self.newpath, 'test')
        clone_repo = pygit2.clone_repository(gitrepo, repopath)

        # Create a file in that git repo
        with open(os.path.join(repopath, 'sources'), 'w') as stream:
            stream.write('foo\n bar')
        clone_repo.index.add('sources')
        clone_repo.index.write()

        try:
            com = repo.revparse_single('HEAD')
            prev_commit = [com.oid.hex]
        except:
            prev_commit = []

        # Commits the files added
        tree = clone_repo.index.write_tree()
        author = _make_signature(
            'Alice Author', 'alice@authors.tld')
        committer = _make_signature(
            'Cecil Committer', 'cecil@committers.tld')
        clone_repo.create_commit(
            'refs/heads/master',  # the name of the reference to update
            author,
            committer,
            'Add sources file for testing',
            # binary string representing the tree object ID
            tree,
            # list of binary strings representing parents of the new commit
            prev_commit
        )
        time.sleep(1)
        refname = 'refs/heads/master:refs/heads/master'
        ori_remote = clone_repo.remotes[0]
        PagureRepo.push(ori_remote, refname)

        first_commit = repo.revparse_single('HEAD')

        with open(os.path.join(repopath, '.gitignore'), 'w') as stream:
            stream.write('*~')
        clone_repo.index.add('.gitignore')
        clone_repo.index.write()

        # Commits the files added
        tree = clone_repo.index.write_tree()
        author = _make_signature(
            'Alice Äuthòr', 'alice@äuthòrs.tld')
        committer = _make_signature(
            'Cecil Cõmmîttër', 'cecil@cõmmîttërs.tld')
        clone_repo.create_commit(
            'refs/heads/master',
            author,
            committer,
            'Add .gitignore file for testing',
            # binary string representing the tree object ID
            tree,
            # list of binary strings representing parents of the new commit
            [first_commit.oid.hex]
        )
        refname = 'refs/heads/master:refs/heads/master'
        ori_remote = clone_repo.remotes[0]
        PagureRepo.push(ori_remote, refname)

        # Set the second repo

        new_gitrepo = repopath
        if new_project:
            # Create a new git repo to play with
            new_gitrepo = os.path.join(self.newpath, new_project.fullname)
            if not os.path.exists(new_gitrepo):
                os.makedirs(new_gitrepo)
                new_repo = pygit2.clone_repository(gitrepo, new_gitrepo)

        repo = pygit2.Repository(new_gitrepo)

        # Edit the sources file again
        with open(os.path.join(new_gitrepo, 'sources'), 'w') as stream:
            stream.write('foo\n bar\nbaz\n boose')
        repo.index.add('sources')
        repo.index.write()

        # Commits the files added
        tree = repo.index.write_tree()
        author = _make_signature(
            'Alice Author', 'alice@authors.tld')
        committer = _make_signature(
            'Cecil Committer', 'cecil@committers.tld')
        repo.create_commit(
            'refs/heads/%s' % branch_from,
            author,
            committer,
            'A commit on branch %s' % branch_from,
            tree,
            [first_commit.oid.hex]
        )
        refname = 'refs/heads/%s' % (branch_from)
        ori_remote = repo.remotes[0]
        PagureRepo.push(ori_remote, refname)

    @patch('pagure.lib.notify.send_email',  MagicMock(return_value=True))
    def test_new_remote_pr_unauth(self):
        """ Test creating a new remote PR un-authenticated. """

        tests.create_projects(self.session)
        tests.create_projects_git(
            os.path.join(self.path, 'requests'), bare=True)
        self.set_up_git_repo()

        # Before
        project = pagure.lib.query.get_authorized_project(self.session, 'test')
        self.assertEqual(len(project.requests), 0)

        # Try creating a remote PR
        output = self.app.get('/test/diff/remote')
        self.assertEqual(output.status_code, 302)
        self.assertIn(
            'You should be redirected automatically to target URL: '
            '<a href="/login/?', output.get_data(as_text=True))

    @patch('pagure.lib.notify.send_email',  MagicMock(return_value=True))
    def test_new_remote_pr_auth(self):
        """ Test creating a new remote PR authenticated. """

        tests.create_projects(self.session)
        tests.create_projects_git(
            os.path.join(self.path, 'requests'), bare=True)
        self.set_up_git_repo()

        # Before
        self.session = pagure.lib.query.create_session(self.dbpath)
        project = pagure.lib.query.get_authorized_project(self.session, 'test')
        self.assertEqual(len(project.requests), 0)

        # Try creating a remote PR
        user = tests.FakeUser(username='foo')
        with tests.user_set(self.app.application, user):
            output = self.app.get('/test/diff/remote')
            self.assertEqual(output.status_code, 200)
            self.assertIn(
                '<h2>New remote pull-request</h2>',
                output.get_data(as_text=True))

            csrf_token = self.get_csrf(output=output)
            with patch(
                    'pagure.forms.RemoteRequestPullForm.git_repo.args',
                    MagicMock(return_value=(
                        u'Git Repo address',
                        [wtforms.validators.DataRequired()]))):
                data = {
                    'csrf_token': csrf_token,
                    'title': 'Remote PR title',
                    'branch_from': 'feature',
                    'branch_to': 'master',
                    'git_repo': os.path.join(self.newpath, 'test'),
                }
                output = self.app.post('/test/diff/remote', data=data)
                self.assertEqual(output.status_code, 200)
                output_text = output.get_data(as_text=True)
                self.assertIn('Create Pull Request\n    </div>\n', output_text)
                self.assertIn(
                    '<div class="card mb-3" id="_1">\n', output_text)
                self.assertIn(
                    '<div class="card mb-3" id="_2">\n', output_text)
                self.assertNotIn(
                    '<div class="card mb-3" id="_3">\n', output_text)

                # Not saved yet
                self.session = pagure.lib.query.create_session(self.dbpath)
                project = pagure.lib.query.get_authorized_project(self.session, 'test')
                self.assertEqual(len(project.requests), 0)

                data = {
                    'csrf_token': csrf_token,
                    'title': 'Remote PR title',
                    'branch_from': 'feature',
                    'branch_to': 'master',
                    'git_repo': os.path.join(self.newpath, 'test'),
                    'confirm': 1,
                }
                self.old_value = pagure.config.config['DISABLE_REMOTE_PR']
                pagure.config.config['DISABLE_REMOTE_PR'] = True
                output = self.app.post(
                    '/test/diff/remote', data=data, follow_redirects=True)
                self.assertEqual(output.status_code, 404)
                pagure.config.config['DISABLE_REMOTE_PR'] = self.old_value
                output = self.app.post(
                    '/test/diff/remote', data=data, follow_redirects=True)
                self.assertEqual(output.status_code, 200)
                output_text = output.get_data(as_text=True)
                self.assertIn(
                    '<span class="text-success font-weight-bold">#1',
                    output_text)
                self.assertIn(
                    '<div class="card mb-3" id="_1">\n', output_text)
                self.assertIn(
                    '<div class="card mb-3" id="_2">\n', output_text)
                self.assertNotIn(
                    '<div class="card mb-3" id="_3">\n', output_text)

                # Show the filename in the Changes summary
                self.assertIn(
                    '<a href="#_1" class="list-group-item', output_text)
                self.assertIn(
                    '<div class="ellipsis pr-changes-description">'
                    '\n          <small>.gitignore</small>', output_text)
                self.assertIn(
                    '<a href="#_2" class="list-group-item', output_text)
                self.assertIn(
                    '<div class="ellipsis pr-changes-description">'
                    '\n          <small>sources</small>', output_text)

        # Remote PR Created
        self.session = pagure.lib.query.create_session(self.dbpath)
        project = pagure.lib.query.get_authorized_project(self.session, 'test')
        self.assertEqual(len(project.requests), 1)

    @patch('pagure.lib.notify.send_email',  MagicMock(return_value=True))
    def test_new_remote_no_title(self):
        """ Test creating a new remote PR authenticated when no title is
        specified. """

        tests.create_projects(self.session)
        tests.create_projects_git(
            os.path.join(self.path, 'requests'), bare=True)
        self.set_up_git_repo()

        # Before
        self.session = pagure.lib.query.create_session(self.dbpath)
        project = pagure.lib.query.get_authorized_project(self.session, 'test')
        self.assertEqual(len(project.requests), 0)

        # Try creating a remote PR
        user = tests.FakeUser(username='foo')
        with tests.user_set(self.app.application, user):
            output = self.app.get('/test/diff/remote')
            self.assertEqual(output.status_code, 200)
            self.assertIn(
                '<h2>New remote pull-request</h2>',
                output.get_data(as_text=True))

            csrf_token = self.get_csrf(output=output)
            with patch(
                    'pagure.forms.RemoteRequestPullForm.git_repo.args',
                    MagicMock(return_value=(
                        u'Git Repo address',
                        [wtforms.validators.DataRequired()]))):
                data = {
                    'csrf_token': csrf_token,
                    'branch_from': 'master',
                    'branch_to': 'feature',
                    'git_repo': os.path.join(self.newpath, 'test'),
                }
                output = self.app.post('/test/diff/remote', data=data)
                self.assertEqual(output.status_code, 200)
                output_text = output.get_data(as_text=True)
                self.assertIn(
                    '<h2>New remote pull-request</h2>', output_text)
                self.assertIn(
                    '<option selected>feature</option>', output_text)

    @patch('pagure.lib.notify.send_email',  MagicMock(return_value=True))
    def test_new_remote_pr_empty_target(self):
        """ Test creating a new remote PR authenticated against an empty
        git repo. """

        tests.create_projects(self.session)
        tests.create_projects_git(
            os.path.join(self.path, 'requests'), bare=True)

        # Create empty target git repo
        gitrepo = os.path.join(self.path, 'repos', 'test.git')
        pygit2.init_repository(gitrepo, bare=True)

        # Create git repo we'll pull from
        gitrepo = os.path.join(self.path, 'repos', 'test_origin.git')
        repo = pygit2.init_repository(gitrepo)

        # Create a file in that git repo
        with open(os.path.join(gitrepo, 'sources'), 'w') as stream:
            stream.write('foo\n bar')
        repo.index.add('sources')
        repo.index.write()

        prev_commit = []

        # Commits the files added
        tree = repo.index.write_tree()
        author = _make_signature(
            'Alice Author', 'alice@authors.tld')
        committer = _make_signature(
            'Cecil Committer', 'cecil@committers.tld')
        repo.create_commit(
            'refs/heads/feature',  # the name of the reference to update
            author,
            committer,
            'Add sources file for testing',
            # binary string representing the tree object ID
            tree,
            # list of binary strings representing parents of the new commit
            prev_commit
        )

        # Before
        self.session = pagure.lib.query.create_session(self.dbpath)
        project = pagure.lib.query.get_authorized_project(self.session, 'test')
        self.assertEqual(len(project.requests), 0)

        # Try creating a remote PR
        user = tests.FakeUser(username='foo')
        with tests.user_set(self.app.application, user):
            output = self.app.get('/test/diff/remote')
            self.assertEqual(output.status_code, 200)
            self.assertIn(
                '<h2>New remote pull-request</h2>',
                output.get_data(as_text=True))

            csrf_token = self.get_csrf(output=output)

            with patch(
                    'pagure.forms.RemoteRequestPullForm.git_repo.args',
                    MagicMock(return_value=(
                        u'Git Repo address',
                        [wtforms.validators.DataRequired()]))):
                data = {
                    'csrf_token': csrf_token,
                    'title': 'Remote PR title',
                    'branch_from': 'feature',
                    'branch_to': 'master',
                    'git_repo': gitrepo,
                }
                output = self.app.post('/test/diff/remote', data=data)
                self.assertEqual(output.status_code, 200)
                output_text = output.get_data(as_text=True)
                self.assertIn('Create Pull Request\n    </div>\n', output_text)
                self.assertIn(
                    '<div class="card mb-3" id="_1">\n', output_text)
                self.assertNotIn(
                    '<div class="card mb-3" id="_2">\n', output_text)

                # Not saved yet
                self.session = pagure.lib.query.create_session(self.dbpath)
                project = pagure.lib.query.get_authorized_project(self.session, 'test')
                self.assertEqual(len(project.requests), 0)

                data = {
                    'csrf_token': csrf_token,
                    'title': 'Remote PR title',
                    'branch_from': 'feature',
                    'branch_to': 'master',
                    'git_repo': gitrepo,
                    'confirm': 1,
                }
                output = self.app.post(
                    '/test/diff/remote', data=data, follow_redirects=True)
                self.assertEqual(output.status_code, 200)
                output_text = output.get_data(as_text=True)
                self.assertIn(
                    '<title>PR#1: Remote PR title - test\n - Pagure</title>',
                    output_text)
                self.assertIn(
                    '<div class="card mb-3" id="_1">\n', output_text)
                self.assertNotIn(
                    '<div class="card mb-3" id="_2">\n', output_text)

                # Show the filename in the Changes summary
                self.assertIn(
                    '<a href="#_1" class="list-group-item', output_text)
                self.assertIn(
                    '<div class="ellipsis pr-changes-description">'
                    '\n          <small>sources</small>', output_text)

        # Remote PR Created
        self.session = pagure.lib.query.create_session(self.dbpath)
        project = pagure.lib.query.get_authorized_project(self.session, 'test')
        self.assertEqual(len(project.requests), 1)

        # Check the merge state of the PR
        data = {
            'csrf_token': csrf_token,
            'requestid': project.requests[0].uid,
        }
        output = self.app.post('/pv/pull-request/merge', data=data)
        self.assertEqual(output.status_code, 200)
        output_text = output.get_data(as_text=True)
        data = json.loads(output_text)
        self.assertEqual(
            data,
            {
                "code": "FFORWARD",
                "message": "The pull-request can be merged and fast-forwarded",
                "short_code": "Ok"
            }
        )

        user = tests.FakeUser(username='pingou')
        with tests.user_set(self.app.application, user):
            # Merge the PR
            data = {
                'csrf_token': csrf_token,
            }
            output = self.app.post(
                '/test/pull-request/1/merge', data=data, follow_redirects=True)
            output_text = output.get_data(as_text=True)
            self.assertEqual(output.status_code, 200)
            self.assertIn(
                '<title>Overview - test - Pagure</title>', output_text
            )

    @patch('pagure.lib.notify.send_email',  MagicMock(return_value=True))
    @patch('pagure.lib.tasks_services.trigger_ci_build')
    def test_new_remote_pr_ci_off(self, trigger_ci):
        """ Test creating a new remote PR when CI is not configured. """

        tests.create_projects(self.session)
        tests.create_projects_git(
            os.path.join(self.path, 'requests'), bare=True)
        self.set_up_git_repo()

        # Before
        self.session = pagure.lib.query.create_session(self.dbpath)
        project = pagure.lib.query.get_authorized_project(self.session, 'test')
        self.assertEqual(len(project.requests), 0)

        # Create a remote PR
        user = tests.FakeUser(username='foo')
        with tests.user_set(self.app.application, user):

            csrf_token = self.get_csrf()
            data = {
                'csrf_token': csrf_token,
                'title': 'Remote PR title',
                'branch_from': 'feature',
                'branch_to': 'master',
                'git_repo': os.path.join(self.newpath, 'test'),
            }
            with patch(
                    'pagure.forms.RemoteRequestPullForm.git_repo.args',
                    MagicMock(return_value=(
                        u'Git Repo address',
                        [wtforms.validators.DataRequired()]))):

                output = self.app.post(
                    '/test/diff/remote', data=data, follow_redirects=True)
                self.assertEqual(output.status_code, 200)

                data['confirm'] = 1
                output = self.app.post(
                    '/test/diff/remote', data=data, follow_redirects=True)
                self.assertEqual(output.status_code, 200)
                output_text = output.get_data(as_text=True)
                self.assertIn(
                    '<span class="text-success font-weight-bold">#1',
                    output_text)
                self.assertIn(
                    '<div class="card mb-3" id="_1">\n', output_text)
                self.assertIn(
                    '<div class="card mb-3" id="_2">\n', output_text)
                self.assertNotIn(
                    '<div class="card mb-3" id="_3">\n', output_text)

        # Remote PR Created
        self.session = pagure.lib.query.create_session(self.dbpath)
        project = pagure.lib.query.get_authorized_project(self.session, 'test')
        self.assertEqual(len(project.requests), 1)
        trigger_ci.assert_not_called()

    @patch('pagure.lib.notify.send_email',  MagicMock(return_value=True))
    @patch('pagure.lib.tasks_services.trigger_ci_build')
    def test_new_remote_pr_ci_on(self, trigger_ci):
        """ Test creating a new remote PR when CI is configured. """

        tests.create_projects(self.session)
        tests.create_projects_git(
            os.path.join(self.path, 'requests'), bare=True)
        self.set_up_git_repo()

        # Before
        self.session = pagure.lib.query.create_session(self.dbpath)
        project = pagure.lib.query.get_authorized_project(self.session, 'test')
        self.assertEqual(len(project.requests), 0)

        # Create a remote PR
        user = tests.FakeUser(username='pingou')
        with tests.user_set(self.app.application, user):
            csrf_token = self.get_csrf()

            # Activate CI hook
            data = {
                'active_pr': 'y',
                'ci_url': 'https://jenkins.fedoraproject.org',
                'ci_job': 'test/job',
                'ci_type': 'jenkins',
                'csrf_token': csrf_token,
            }
            output = self.app.post(
                '/test/settings/Pagure CI', data=data, follow_redirects=True)
            self.assertEqual(output.status_code, 200)

        user = tests.FakeUser(username='foo')
        with tests.user_set(self.app.application, user):
            data = {
                'csrf_token': csrf_token,
                'title': 'Remote PR title',
                'branch_from': 'feature',
                'branch_to': 'master',
                'git_repo': os.path.join(self.newpath, 'test'),
            }
            # Disables checking the URL pattern for git_repo
            with patch(
                    'pagure.forms.RemoteRequestPullForm.git_repo.args',
                    MagicMock(return_value=(
                        u'Git Repo address',
                        [wtforms.validators.DataRequired()]))):

                # Do the preview, triggers the cache & all
                output = self.app.post(
                    '/test/diff/remote', data=data, follow_redirects=True)
                self.assertEqual(output.status_code, 200)

                # Confirm the PR creation
                data['confirm'] = 1
                output = self.app.post(
                    '/test/diff/remote', data=data, follow_redirects=True)
                self.assertEqual(output.status_code, 200)
                output_text = output.get_data(as_text=True)
                self.assertIn(
                    '<span class="text-success font-weight-bold">#1',
                    output_text)
                self.assertIn(
                    '<div class="card mb-3" id="_1">\n', output_text)
                self.assertIn(
                    '<div class="card mb-3" id="_2">\n', output_text)
                self.assertNotIn(
                    '<div class="card mb-3" id="_3">\n', output_text)

        # Remote PR Created
        self.session = pagure.lib.query.create_session(self.dbpath)
        project = pagure.lib.query.get_authorized_project(self.session, 'test')
        self.assertEqual(len(project.requests), 1)
        trigger_ci.assert_not_called()


if __name__ == '__main__':
    unittest.main(verbosity=2)