# Copyright (C) 2010-2024 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# 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 Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/

import pytest

from rhodecode.model.db import UserLog, PullRequest
from rhodecode.model.meta import Session
from rhodecode.tests import TEST_USER_ADMIN_LOGIN
from rhodecode.api.tests.utils import build_data, api_call, assert_error, assert_ok


@pytest.mark.usefixtures("testuser_api", "app")
class TestMergePullRequest(object):
    @pytest.mark.backends("git", "hg")
    def test_api_merge_pull_request_merge_failed(self, pr_util, no_notifications):
        pull_request = pr_util.create_pull_request(mergeable=True)
        pull_request_id = pull_request.pull_request_id
        pull_request_repo = pull_request.target_repo.repo_name

        id_, params = build_data(
            self.apikey, "merge_pull_request", repoid=pull_request_repo, pullrequestid=pull_request_id
        )

        response = api_call(self.app, params)

        # The above api call detaches the pull request DB object from the
        # session because of an unconditional transaction rollback in our
        # middleware. Therefore we need to add it back here if we want to use it.
        Session().add(pull_request)

        expected = "merge not possible for following reasons: Pull request reviewer approval is pending."
        assert_error(id_, expected, given=response.body)

    @pytest.mark.backends("git", "hg")
    def test_api_merge_pull_request_merge_failed_disallowed_state(self, pr_util, no_notifications):
        pull_request = pr_util.create_pull_request(mergeable=True, approved=True)
        pull_request_id = pull_request.pull_request_id
        pull_request_repo = pull_request.target_repo.repo_name

        pr = PullRequest.get(pull_request_id)
        pr.pull_request_state = pull_request.STATE_UPDATING
        Session().add(pr)
        Session().commit()

        id_, params = build_data(
            self.apikey, "merge_pull_request", repoid=pull_request_repo, pullrequestid=pull_request_id
        )

        response = api_call(self.app, params)
        expected = "Operation forbidden because pull request is in state {}, only state {} is allowed.".format(
            PullRequest.STATE_UPDATING, PullRequest.STATE_CREATED
        )
        assert_error(id_, expected, given=response.body)

    @pytest.mark.backends("git", "hg")
    def test_api_merge_pull_request(self, pr_util, no_notifications):
        pull_request = pr_util.create_pull_request(mergeable=True, approved=True)
        author = pull_request.user_id
        repo = pull_request.target_repo.repo_id
        pull_request_id = pull_request.pull_request_id
        pull_request_repo = pull_request.target_repo.repo_name

        id_, params = build_data(
            self.apikey,
            "comment_pull_request",
            repoid=pull_request_repo,
            pullrequestid=pull_request_id,
            status="approved",
        )

        response = api_call(self.app, params)
        expected = {
            "comment_id": response.json.get("result", {}).get("comment_id"),
            "pull_request_id": pull_request_id,
            "status": {"given": "approved", "was_changed": True},
        }
        assert_ok(id_, expected, given=response.body)

        id_, params = build_data(
            self.apikey, "merge_pull_request", repoid=pull_request_repo, pullrequestid=pull_request_id
        )

        response = api_call(self.app, params)

        pull_request = PullRequest.get(pull_request_id)

        expected = {
            "executed": True,
            "failure_reason": 0,
            "merge_status_message": "This pull request can be automatically merged.",
            "possible": True,
            "merge_commit_id": pull_request.shadow_merge_ref.commit_id,
            "merge_ref": pull_request.shadow_merge_ref.asdict(),
        }

        assert_ok(id_, expected, response.body)

        journal = (
            UserLog.query()
            .filter(UserLog.user_id == author)
            .filter(UserLog.repository_id == repo)
            .order_by(UserLog.user_log_id.asc())
            .all()
        )
        assert journal[-2].action == "repo.pull_request.merge"
        assert journal[-1].action == "repo.pull_request.close"

        id_, params = build_data(
            self.apikey, "merge_pull_request", repoid=pull_request_repo, pullrequestid=pull_request_id
        )
        response = api_call(self.app, params)

        expected = "merge not possible for following reasons: This pull request is closed."
        assert_error(id_, expected, given=response.body)

    @pytest.mark.backends("git", "hg")
    def test_api_merge_pull_request_as_another_user_no_perms_to_merge(self, pr_util, no_notifications, user_util):
        merge_user = user_util.create_user()
        merge_user_id = merge_user.user_id
        merge_user_username = merge_user.username

        pull_request = pr_util.create_pull_request(mergeable=True, approved=True)

        pull_request_id = pull_request.pull_request_id
        pull_request_repo = pull_request.target_repo.repo_name

        id_, params = build_data(
            self.apikey,
            "comment_pull_request",
            repoid=pull_request_repo,
            pullrequestid=pull_request_id,
            status="approved",
        )

        response = api_call(self.app, params)
        expected = {
            "comment_id": response.json.get("result", {}).get("comment_id"),
            "pull_request_id": pull_request_id,
            "status": {"given": "approved", "was_changed": True},
        }
        assert_ok(id_, expected, given=response.body)
        id_, params = build_data(
            self.apikey,
            "merge_pull_request",
            repoid=pull_request_repo,
            pullrequestid=pull_request_id,
            userid=merge_user_id,
        )

        response = api_call(self.app, params)
        expected = "merge not possible for following reasons: User `{}` not allowed to perform merge.".format(
            merge_user_username
        )
        assert_error(id_, expected, response.body)

    @pytest.mark.backends("git", "hg")
    def test_api_merge_pull_request_as_another_user(self, pr_util, no_notifications, user_util):
        merge_user = user_util.create_user()
        merge_user_id = merge_user.user_id
        pull_request = pr_util.create_pull_request(mergeable=True, approved=True)
        user_util.grant_user_permission_to_repo(pull_request.target_repo, merge_user, "repository.write")
        author = pull_request.user_id
        repo = pull_request.target_repo.repo_id
        pull_request_id = pull_request.pull_request_id
        pull_request_repo = pull_request.target_repo.repo_name

        id_, params = build_data(
            self.apikey,
            "comment_pull_request",
            repoid=pull_request_repo,
            pullrequestid=pull_request_id,
            status="approved",
        )

        response = api_call(self.app, params)
        expected = {
            "comment_id": response.json.get("result", {}).get("comment_id"),
            "pull_request_id": pull_request_id,
            "status": {"given": "approved", "was_changed": True},
        }
        assert_ok(id_, expected, given=response.body)

        id_, params = build_data(
            self.apikey,
            "merge_pull_request",
            repoid=pull_request_repo,
            pullrequestid=pull_request_id,
            userid=merge_user_id,
        )

        response = api_call(self.app, params)

        pull_request = PullRequest.get(pull_request_id)

        expected = {
            "executed": True,
            "failure_reason": 0,
            "merge_status_message": "This pull request can be automatically merged.",
            "possible": True,
            "merge_commit_id": pull_request.shadow_merge_ref.commit_id,
            "merge_ref": pull_request.shadow_merge_ref.asdict(),
        }

        assert_ok(id_, expected, response.body)

        journal = (
            UserLog.query()
            .filter(UserLog.user_id == merge_user_id)
            .filter(UserLog.repository_id == repo)
            .order_by(UserLog.user_log_id.asc())
            .all()
        )
        assert journal[-2].action == "repo.pull_request.merge"
        assert journal[-1].action == "repo.pull_request.close"

        id_, params = build_data(
            self.apikey,
            "merge_pull_request",
            repoid=pull_request_repo,
            pullrequestid=pull_request_id,
            userid=merge_user_id,
        )
        response = api_call(self.app, params)

        expected = "merge not possible for following reasons: This pull request is closed."
        assert_error(id_, expected, given=response.body)

    @pytest.mark.backends("git", "hg")
    def test_api_merge_pull_request_repo_error(self, pr_util):
        pull_request = pr_util.create_pull_request()
        id_, params = build_data(
            self.apikey, "merge_pull_request", repoid=666, pullrequestid=pull_request.pull_request_id
        )
        response = api_call(self.app, params)

        expected = "repository `666` does not exist"
        assert_error(id_, expected, given=response.body)

    @pytest.mark.backends("git", "hg")
    def test_api_merge_pull_request_non_admin_with_userid_error(self, pr_util):
        pull_request = pr_util.create_pull_request(mergeable=True)
        id_, params = build_data(
            self.apikey_regular,
            "merge_pull_request",
            repoid=pull_request.target_repo.repo_name,
            pullrequestid=pull_request.pull_request_id,
            userid=TEST_USER_ADMIN_LOGIN,
        )
        response = api_call(self.app, params)

        expected = "Provided userid is not the same the user calling this function"
        assert_error(id_, expected, given=response.body)