# Copyright (C) 2010-2023 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 datetime
from urllib.error import URLError

import mock
import pytest

from rhodecode.lib.vcs import backends
from rhodecode.lib.vcs.backends.base import (
    Config,
    BaseInMemoryCommit,
    Reference,
    MergeResponse,
    MergeFailureReason,
)
from rhodecode.lib.vcs.exceptions import VCSError, RepositoryError
from rhodecode.lib.vcs.nodes import FileNode
from rhodecode.tests.vcs.conftest import BackendTestMixin
from rhodecode.tests import repo_id_generator


@pytest.mark.usefixtures("vcs_repository_support")
class TestRepositoryBase(BackendTestMixin):
    recreate_repo_per_test = False

    def test_init_accepts_unicode_path(self, tmpdir):
        path = str(tmpdir.join("unicode ä"))
        self.Backend(path, create=True)

    def test_init_accepts_str_path(self, tmpdir):
        path = str(tmpdir.join("str ä"))
        self.Backend(path, create=True)

    def test_init_fails_if_path_does_not_exist(self, tmpdir):
        path = str(tmpdir.join("i-do-not-exist"))
        with pytest.raises(VCSError):
            self.Backend(path)

    def test_init_fails_if_path_is_not_a_valid_repository(self, tmpdir):
        path = str(tmpdir.mkdir("unicode ä"))
        with pytest.raises(VCSError):
            self.Backend(path)

    def test_has_commits_attribute(self):
        assert self.repo.commit_ids

    def test_name(self):
        assert self.repo.name.startswith("vcs-test")

    @pytest.mark.backends("hg", "git")
    def test_has_default_branch_name(self):
        assert self.repo.DEFAULT_BRANCH_NAME is not None

    @pytest.mark.backends("svn")
    def test_has_no_default_branch_name(self):
        assert self.repo.DEFAULT_BRANCH_NAME is None

    def test_has_empty_commit(self):
        assert self.repo.EMPTY_COMMIT_ID is not None
        assert self.repo.EMPTY_COMMIT is not None

    def test_empty_changeset_is_deprecated(self):
        def get_empty_changeset(repo):
            return repo.EMPTY_CHANGESET

        pytest.deprecated_call(get_empty_changeset, self.repo)

    def test_bookmarks(self):
        assert len(self.repo.bookmarks) == 0

    def test_check_url_on_path(self):
        config = Config()
        assert self.Backend.check_url(self.repo.path, config)

    def test_check_url_on_remote_url(self):
        config = Config()
        url = {
            "hg": "https://code.rhodecode.com/rhodecode-vcsserver",
            "svn": "https://default:default@code.rhodecode.com/svn-doc",
            "git": "https://code.rhodecode.com/appenlight",
        }[self.repo.alias]

        assert self.Backend.check_url(url, config)

    def test_check_url_invalid(self):
        config = Config()
        with pytest.raises(URLError):
            self.Backend.check_url(self.repo.path + "invalid", config)

    def test_get_contact(self):
        assert self.repo.contact

    def test_get_description(self):
        assert self.repo.description

    def test_get_hook_location(self):
        assert len(self.repo.get_hook_location()) != 0

    def test_last_change(self, local_dt_to_utc):
        assert self.repo.last_change >= local_dt_to_utc(datetime.datetime(2010, 1, 1, 21, 0))

    def test_last_change_in_empty_repository(self, vcsbackend, local_dt_to_utc):
        delta = datetime.timedelta(seconds=1)

        start = local_dt_to_utc(datetime.datetime.now())
        empty_repo = vcsbackend.create_repo()
        now = local_dt_to_utc(datetime.datetime.now())
        assert empty_repo.last_change >= start - delta
        assert empty_repo.last_change <= now + delta

    def test_repo_equality(self):
        assert self.repo == self.repo

    def test_repo_equality_broken_object(self):
        import copy

        _repo = copy.copy(self.repo)
        delattr(_repo, "path")
        assert self.repo != _repo

    def test_repo_equality_other_object(self):
        class dummy(object):
            path = self.repo.path

        assert self.repo != dummy()

    def test_get_commit_is_implemented(self):
        self.repo.get_commit()

    def test_get_commits_is_implemented(self):
        commit_iter = iter(self.repo.get_commits())
        commit = next(commit_iter)
        assert commit.idx == 0

    def test_supports_iteration(self):
        repo_iter = iter(self.repo)
        commit = next(repo_iter)
        assert commit.idx == 0

    def test_in_memory_commit(self):
        imc = self.repo.in_memory_commit
        assert isinstance(imc, BaseInMemoryCommit)

    @pytest.mark.backends("hg")
    def test__get_url_unicode(self):
        url = "/home/repos/malmö"
        assert self.repo._get_url(url)


@pytest.mark.usefixtures("vcs_repository_support")
class TestDeprecatedRepositoryAPI(BackendTestMixin):
    recreate_repo_per_test = False

    def test_revisions_is_deprecated(self):
        def get_revisions(repo):
            return repo.revisions

        pytest.deprecated_call(get_revisions, self.repo)

    def test_get_changeset_is_deprecated(self):
        pytest.deprecated_call(self.repo.get_changeset)

    def test_get_changesets_is_deprecated(self):
        pytest.deprecated_call(self.repo.get_changesets)

    def test_in_memory_changeset_is_deprecated(self):
        def get_imc(repo):
            return repo.in_memory_changeset

        pytest.deprecated_call(get_imc, self.repo)


# TODO: these tests are incomplete, must check the resulting compare result for
# correcteness
class TestRepositoryCompare:
    @pytest.mark.parametrize("merge", [True, False])
    def test_compare_commits_of_same_repository(self, vcsbackend, merge):
        target_repo = vcsbackend.create_repo(number_of_commits=5)
        target_repo.compare(target_repo[1].raw_id, target_repo[3].raw_id, target_repo, merge=merge)

    @pytest.mark.xfail_backends("svn")
    @pytest.mark.parametrize("merge", [True, False])
    def test_compare_cloned_repositories(self, vcsbackend, merge):
        target_repo = vcsbackend.create_repo(number_of_commits=5)
        source_repo = vcsbackend.clone_repo(target_repo)
        assert target_repo != source_repo

        vcsbackend.add_file(source_repo, b"newfile", b"somecontent")
        source_commit = source_repo.get_commit()

        target_repo.compare(target_repo[1].raw_id, source_repo[3].raw_id, source_repo, merge=merge)

    @pytest.mark.xfail_backends("svn")
    @pytest.mark.parametrize("merge", [True, False])
    def test_compare_unrelated_repositories(self, vcsbackend, merge):
        orig = vcsbackend.create_repo(number_of_commits=5)
        unrelated = vcsbackend.create_repo(number_of_commits=5)
        assert orig != unrelated

        orig.compare(orig[1].raw_id, unrelated[3].raw_id, unrelated, merge=merge)


class TestRepositoryGetCommonAncestor:
    def test_get_common_ancestor_from_same_repo_existing(self, vcsbackend):
        target_repo = vcsbackend.create_repo(number_of_commits=5)

        expected_ancestor = target_repo[2].raw_id

        assert (
            target_repo.get_common_ancestor(
                commit_id1=target_repo[2].raw_id,
                commit_id2=target_repo[4].raw_id,
                repo2=target_repo,
            )
            == expected_ancestor
        )

        assert (
            target_repo.get_common_ancestor(
                commit_id1=target_repo[4].raw_id,
                commit_id2=target_repo[2].raw_id,
                repo2=target_repo,
            )
            == expected_ancestor
        )

    @pytest.mark.xfail_backends("svn")
    def test_get_common_ancestor_from_cloned_repo_existing(self, vcsbackend):
        target_repo = vcsbackend.create_repo(number_of_commits=5)
        source_repo = vcsbackend.clone_repo(target_repo)
        assert target_repo != source_repo

        vcsbackend.add_file(source_repo, b"newfile", b"somecontent")
        source_commit = source_repo.get_commit()

        expected_ancestor = target_repo[4].raw_id

        assert (
            target_repo.get_common_ancestor(
                commit_id1=target_repo[4].raw_id,
                commit_id2=source_commit.raw_id,
                repo2=source_repo,
            )
            == expected_ancestor
        )

        assert (
            target_repo.get_common_ancestor(
                commit_id1=source_commit.raw_id,
                commit_id2=target_repo[4].raw_id,
                repo2=target_repo,
            )
            == expected_ancestor
        )

    @pytest.mark.xfail_backends("svn")
    def test_get_common_ancestor_from_unrelated_repo_missing(self, vcsbackend):
        original = vcsbackend.create_repo(number_of_commits=5)
        unrelated = vcsbackend.create_repo(number_of_commits=5)
        assert original != unrelated

        assert (
            original.get_common_ancestor(
                commit_id1=original[0].raw_id,
                commit_id2=unrelated[0].raw_id,
                repo2=unrelated,
            )
            is None
        )

        assert (
            original.get_common_ancestor(
                commit_id1=original[-1].raw_id,
                commit_id2=unrelated[-1].raw_id,
                repo2=unrelated,
            )
            is None
        )


@pytest.mark.backends("git", "hg")
class TestRepositoryMerge(object):
    def prepare_for_success(self, vcsbackend):
        self.target_repo = vcsbackend.create_repo(number_of_commits=1)
        self.source_repo = vcsbackend.clone_repo(self.target_repo)
        vcsbackend.add_file(self.target_repo, b"README_MERGE1", b"Version 1")
        vcsbackend.add_file(self.source_repo, b"README_MERGE2", b"Version 2")
        imc = self.source_repo.in_memory_commit
        imc.add(FileNode(b"file_x", content=self.source_repo.name))
        imc.commit(
            message="Automatic commit from repo merge test",
            author="Automatic <automatic@rhodecode.com>",
        )
        self.target_commit = self.target_repo.get_commit()
        self.source_commit = self.source_repo.get_commit()
        # This only works for Git and Mercurial
        default_branch = self.target_repo.DEFAULT_BRANCH_NAME
        self.target_ref = Reference("branch", default_branch, self.target_commit.raw_id)
        self.source_ref = Reference("branch", default_branch, self.source_commit.raw_id)
        self.workspace_id = "test-merge-{}".format(vcsbackend.alias)
        self.repo_id = repo_id_generator(self.target_repo.path)

    def prepare_for_conflict(self, vcsbackend):
        self.target_repo = vcsbackend.create_repo(number_of_commits=1)
        self.source_repo = vcsbackend.clone_repo(self.target_repo)
        vcsbackend.add_file(self.target_repo, b"README_MERGE", b"Version 1")
        vcsbackend.add_file(self.source_repo, b"README_MERGE", b"Version 2")
        self.target_commit = self.target_repo.get_commit()
        self.source_commit = self.source_repo.get_commit()
        # This only works for Git and Mercurial
        default_branch = self.target_repo.DEFAULT_BRANCH_NAME
        self.target_ref = Reference("branch", default_branch, self.target_commit.raw_id)
        self.source_ref = Reference("branch", default_branch, self.source_commit.raw_id)
        self.workspace_id = "test-merge-{}".format(vcsbackend.alias)
        self.repo_id = repo_id_generator(self.target_repo.path)

    def test_merge_success(self, vcsbackend):
        self.prepare_for_success(vcsbackend)

        merge_response = self.target_repo.merge(
            self.repo_id,
            self.workspace_id,
            self.target_ref,
            self.source_repo,
            self.source_ref,
            "test user",
            "test@rhodecode.com",
            "merge message 1",
            dry_run=False,
        )
        expected_merge_response = MergeResponse(True, True, merge_response.merge_ref, MergeFailureReason.NONE)
        assert merge_response == expected_merge_response

        target_repo = backends.get_backend(vcsbackend.alias)(self.target_repo.path)
        target_commits = list(target_repo.get_commits())
        commit_ids = [c.raw_id for c in target_commits[:-1]]
        assert self.source_ref.commit_id in commit_ids
        assert self.target_ref.commit_id in commit_ids

        merge_commit = target_commits[-1]
        assert merge_commit.raw_id == merge_response.merge_ref.commit_id
        assert merge_commit.message.strip() == "merge message 1"
        assert merge_commit.author == "test user <test@rhodecode.com>"

        # We call it twice so to make sure we can handle updates
        target_ref = Reference(
            self.target_ref.type,
            self.target_ref.name,
            merge_response.merge_ref.commit_id,
        )

        merge_response = target_repo.merge(
            self.repo_id,
            self.workspace_id,
            target_ref,
            self.source_repo,
            self.source_ref,
            "test user",
            "test@rhodecode.com",
            "merge message 2",
            dry_run=False,
        )
        expected_merge_response = MergeResponse(True, True, merge_response.merge_ref, MergeFailureReason.NONE)
        assert merge_response == expected_merge_response

        target_repo = backends.get_backend(vcsbackend.alias)(self.target_repo.path)
        merge_commit = target_repo.get_commit(merge_response.merge_ref.commit_id)
        assert merge_commit.message.strip() == "merge message 1"
        assert merge_commit.author == "test user <test@rhodecode.com>"

    def test_merge_success_dry_run(self, vcsbackend):
        self.prepare_for_success(vcsbackend)

        merge_response = self.target_repo.merge(
            self.repo_id,
            self.workspace_id,
            self.target_ref,
            self.source_repo,
            self.source_ref,
            dry_run=True,
        )

        # We call it twice so to make sure we can handle updates
        merge_response_update = self.target_repo.merge(
            self.repo_id,
            self.workspace_id,
            self.target_ref,
            self.source_repo,
            self.source_ref,
            dry_run=True,
        )

        assert merge_response.merge_ref
        assert merge_response_update.merge_ref

        # Multiple merges may differ in their commit id. Therefore, we set the
        # commit id to `None` before comparing the merge responses.
        merge_response.merge_ref.commit_id = "abcdeabcde"

        merge_response_update.merge_ref.commit_id = "abcdeabcde"

        assert merge_response == merge_response_update
        assert merge_response.possible is True
        assert merge_response.executed is False
        assert merge_response.merge_ref
        assert merge_response.failure_reason is MergeFailureReason.NONE

    @pytest.mark.parametrize("dry_run", [True, False])
    def test_merge_conflict(self, vcsbackend, dry_run):
        self.prepare_for_conflict(vcsbackend)

        expected_merge_response = MergeResponse(False, False, None, MergeFailureReason.MERGE_FAILED)

        merge_response = self.target_repo.merge(
            self.repo_id,
            self.workspace_id,
            self.target_ref,
            self.source_repo,
            self.source_ref,
            "test_user",
            "test@rhodecode.com",
            "test message",
            dry_run=dry_run,
        )
        assert merge_response == expected_merge_response

        # We call it twice so to make sure we can handle updates
        merge_response = self.target_repo.merge(
            self.repo_id,
            self.workspace_id,
            self.target_ref,
            self.source_repo,
            self.source_ref,
            "test_user",
            "test@rhodecode.com",
            "test message",
            dry_run=dry_run,
        )
        assert merge_response == expected_merge_response

    def test_merge_target_is_not_head(self, vcsbackend):
        self.prepare_for_success(vcsbackend)
        target_ref = Reference(self.target_ref.type, self.target_ref.name, "0" * 40)
        expected_merge_response = MergeResponse(
            False,
            False,
            None,
            MergeFailureReason.TARGET_IS_NOT_HEAD,
            metadata={"target_ref": target_ref},
        )
        merge_response = self.target_repo.merge(
            self.repo_id,
            self.workspace_id,
            target_ref,
            self.source_repo,
            self.source_ref,
            dry_run=True,
        )

        assert merge_response == expected_merge_response

    def test_merge_missing_source_reference(self, vcsbackend):
        self.prepare_for_success(vcsbackend)

        source_ref = Reference(self.source_ref.type, "not_existing", self.source_ref.commit_id)
        expected_merge_response = MergeResponse(
            False,
            False,
            None,
            MergeFailureReason.MISSING_SOURCE_REF,
            metadata={"source_ref": source_ref},
        )

        merge_response = self.target_repo.merge(
            self.repo_id,
            self.workspace_id,
            self.target_ref,
            self.source_repo,
            source_ref,
            dry_run=True,
        )

        assert merge_response == expected_merge_response

    def test_merge_raises_exception(self, vcsbackend):
        self.prepare_for_success(vcsbackend)
        expected_merge_response = MergeResponse(
            False,
            False,
            None,
            MergeFailureReason.UNKNOWN,
            metadata={"exception": "ErrorForTest"},
        )

        with mock.patch.object(self.target_repo, "_merge_repo", side_effect=RepositoryError()):
            merge_response = self.target_repo.merge(
                self.repo_id,
                self.workspace_id,
                self.target_ref,
                self.source_repo,
                self.source_ref,
                dry_run=True,
            )

        assert merge_response == expected_merge_response

    def test_merge_invalid_user_name(self, vcsbackend):
        repo = vcsbackend.create_repo(number_of_commits=1)
        ref = Reference("branch", "master", "not_used")
        workspace_id = "test-errors-in-merge"
        repo_id = repo_id_generator(workspace_id)
        with pytest.raises(ValueError):
            repo.merge(repo_id, workspace_id, ref, self, ref)

    def test_merge_invalid_user_email(self, vcsbackend):
        repo = vcsbackend.create_repo(number_of_commits=1)
        ref = Reference("branch", "master", "not_used")
        workspace_id = "test-errors-in-merge"
        repo_id = repo_id_generator(workspace_id)
        with pytest.raises(ValueError):
            repo.merge(repo_id, workspace_id, ref, self, ref, "user name")

    def test_merge_invalid_message(self, vcsbackend):
        repo = vcsbackend.create_repo(number_of_commits=1)
        ref = Reference("branch", "master", "not_used")
        workspace_id = "test-errors-in-merge"
        repo_id = repo_id_generator(workspace_id)
        with pytest.raises(ValueError):
            repo.merge(repo_id, workspace_id, ref, self, ref, "user name", "user@email.com")


@pytest.mark.usefixtures("vcs_repository_support")
class TestRepositoryStrip(BackendTestMixin):
    recreate_repo_per_test = True

    @classmethod
    def _get_commits(cls):
        commits = [
            {
                "message": "Initial commit",
                "author": "Joe Doe <joe.doe@example.com>",
                "date": datetime.datetime(2010, 1, 1, 20),
                "branch": "master",
                "added": [
                    FileNode(b"foobar", content="foobar"),
                    FileNode(b"foobar2", content="foobar2"),
                ],
            },
        ]
        for x in range(10):
            commit_data = {
                "message": "Changed foobar - commit%s" % x,
                "author": "Jane Doe <jane.doe@example.com>",
                "date": datetime.datetime(2010, 1, 1, 21, x),
                "branch": "master",
                "changed": [
                    FileNode(b"foobar", "FOOBAR - %s" % x),
                ],
            }
            commits.append(commit_data)
        return commits

    @pytest.mark.backends("git", "hg")
    def test_strip_commit(self):
        tip = self.repo.get_commit()
        assert tip.idx == 10
        self.repo.strip(tip.raw_id, self.repo.DEFAULT_BRANCH_NAME)

        tip = self.repo.get_commit()
        assert tip.idx == 9

    @pytest.mark.backends("git", "hg")
    def test_strip_multiple_commits(self):
        tip = self.repo.get_commit()
        assert tip.idx == 10

        old = self.repo.get_commit(commit_idx=5)
        self.repo.strip(old.raw_id, self.repo.DEFAULT_BRANCH_NAME)

        tip = self.repo.get_commit()
        assert tip.idx == 4


@pytest.mark.backends("hg", "git")
class TestRepositoryPull(object):
    def test_pull(self, vcsbackend):
        source_repo = vcsbackend.repo
        target_repo = vcsbackend.create_repo()
        assert len(source_repo.commit_ids) > len(target_repo.commit_ids)

        target_repo.pull(source_repo.path)
        # Note: Get a fresh instance, avoids caching trouble
        target_repo = vcsbackend.backend(target_repo.path)
        assert len(source_repo.commit_ids) == len(target_repo.commit_ids)

    def test_pull_wrong_path(self, vcsbackend):
        target_repo = vcsbackend.create_repo()
        with pytest.raises(RepositoryError):
            target_repo.pull(target_repo.path + "wrong")

    def test_pull_specific_commits(self, vcsbackend):
        source_repo = vcsbackend.repo
        target_repo = vcsbackend.create_repo()

        second_commit = source_repo[1].raw_id
        if vcsbackend.alias == "git":
            second_commit_ref = "refs/test-refs/a"
            source_repo.set_refs(second_commit_ref, second_commit)

        target_repo.pull(source_repo.path, commit_ids=[second_commit])
        target_repo = vcsbackend.backend(target_repo.path)
        assert 2 == len(target_repo.commit_ids)
        assert second_commit == target_repo.get_commit().raw_id