//
use crate::{
    git::{
        self,
        repository::{
            factory::RepositoryFactory as _,
            open::otest::{OnFetch, OnPush},
            Direction, RepositoryLike as _,
        },
        tests::{given, then},
        validation::positions::validate,
    },
    GitDir, StoragePathType,
};

use assert2::let_assert;

mod repos {

    use super::*;

    #[test]
    fn where_repo_has_no_push_remote() {
        let_assert!(Ok(fs) = kxio::fs::temp(), "temp fs");
        let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
        let repo_details = given::repo_details(&fs).with_gitdir(gitdir);
        let mut mock_open_repository = git::repository::open::mock();
        mock_open_repository
            .expect_find_default_remote()
            .with(mockall::predicate::eq(Direction::Push))
            .return_once(|_| None);
        let mut repository_factory = git::repository::factory::mock();
        repository_factory
            .expect_open()
            .return_once(move |_| Ok(mock_open_repository));
        let_assert!(
            Ok(open_repository) = repository_factory.open(&repo_details),
            "open repo"
        );

        let result =
            git::validation::remotes::validate_default_remotes(&*open_repository, &repo_details);
        print!("{result:?}");
        let_assert!(Err(err) = result);
        assert!(matches!(
            err,
            git::validation::remotes::Error::NoDefaultPushRemote
        ));
    }
}

mod positions {
    use super::*;

    mod validate {

        use super::*;

        #[test]
        fn where_fetch_fails_should_error() {
            let fs = given::a_filesystem();
            let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
            let repo_details = given::repo_details(&fs).with_gitdir(gitdir);
            let mut mock_open_repository = git::repository::open::mock();
            mock_open_repository
                .expect_fetch()
                .return_once(|_| Err(git::fetch::Error::TestFailureExpected));
            let mut repository_factory = git::repository::factory::mock();
            repository_factory
                .expect_open()
                .return_once(move |_| Ok(mock_open_repository));
            let_assert!(
                Ok(repository) = repository_factory.open(&repo_details),
                "open repo"
            );
            let repo_config = given::a_repo_config();

            let result = validate(&*repository, &repo_details, &repo_config);
            println!("{result:?}");
            let_assert!(Err(err) = result, "validate");

            assert!(matches!(
                err,
                git::validation::positions::Error::Retryable(_)
            ));
        }

        #[test]
        fn where_main_branch_is_missing_or_commit_log_is_empty_should_error() {
            let fs = given::a_filesystem();
            let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
            let repo_details = given::repo_details(&fs).with_gitdir(gitdir);
            let repo_config = given::a_repo_config();
            let main_branch = repo_config.branches().main();
            let mut mock_open_repository = git::repository::open::mock();
            mock_open_repository.expect_fetch().return_once(|_| Ok(()));
            mock_open_repository
                .expect_commit_log()
                .returning(move |branch_name, _| {
                    if branch_name == &main_branch {
                        Err(git::commit::log::Error::Gix {
                            branch: branch_name.clone(),
                            error: "foo".to_string(),
                        })
                    } else {
                        Ok(vec![])
                    }
                });
            let mut repository_factory = git::repository::factory::mock();
            repository_factory
                .expect_open()
                .return_once(move |_| Ok(mock_open_repository));
            let_assert!(
                Ok(open_repository) = repository_factory.open(&repo_details),
                "open repo"
            );

            let result = validate(&*open_repository, &repo_details, &repo_config);
            println!("{result:?}");

            assert!(matches!(
                result,
                Err(git::validation::positions::Error::Retryable(_))
            ));
        }

        #[test]
        fn where_next_branch_is_missing_or_commit_log_is_empty_should_error() {
            let fs = given::a_filesystem();
            let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
            let repo_details = given::repo_details(&fs).with_gitdir(gitdir);
            let repo_config = given::a_repo_config();
            let next_branch = repo_config.branches().next();
            let mut mock_open_repository = git::repository::open::mock();
            mock_open_repository.expect_fetch().return_once(|_| Ok(()));
            mock_open_repository
                .expect_commit_log()
                .returning(move |branch_name, _| {
                    if branch_name == &next_branch {
                        Err(git::commit::log::Error::Gix {
                            branch: branch_name.clone(),
                            error: "foo".to_string(),
                        })
                    } else {
                        Ok(vec![given::a_commit()])
                    }
                });
            let mut repository_factory = git::repository::factory::mock();
            repository_factory
                .expect_open()
                .return_once(move |_| Ok(mock_open_repository));
            let_assert!(
                Ok(open_repository) = repository_factory.open(&repo_details),
                "open repo"
            );

            let result = validate(&*open_repository, &repo_details, &repo_config);
            println!("{result:?}");

            assert!(matches!(
                result,
                Err(git::validation::positions::Error::Retryable(_))
            ));
        }

        #[test]
        fn where_dev_branch_is_missing_or_commit_log_is_empty_should_error() {
            let fs = given::a_filesystem();
            let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
            let repo_details = given::repo_details(&fs).with_gitdir(gitdir);
            let repo_config = given::a_repo_config();
            let dev_branch = repo_config.branches().dev();
            let mut mock_open_repository = git::repository::open::mock();
            mock_open_repository.expect_fetch().return_once(|_| Ok(()));
            mock_open_repository
                .expect_commit_log()
                .returning(move |branch_name, _| {
                    if branch_name == &dev_branch {
                        Err(git::commit::log::Error::Gix {
                            branch: branch_name.clone(),
                            error: "foo".to_string(),
                        })
                    } else {
                        Ok(vec![given::a_commit()])
                    }
                });
            let mut repository_factory = git::repository::factory::mock();
            repository_factory
                .expect_open()
                .return_once(move |_| Ok(mock_open_repository));
            let_assert!(
                Ok(open_repository) = repository_factory.open(&repo_details),
                "open repo"
            );

            let result = validate(&*open_repository, &repo_details, &repo_config);
            println!("{result:?}");

            assert!(matches!(
                result,
                Err(git::validation::positions::Error::Retryable(_))
            ));
        }

        #[test]
        fn where_dev_branch_is_not_based_on_main_should_error() {
            //given
            let fs = given::a_filesystem();
            let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
            let forge_details = given::forge_details();
            let mut test_repository = git::repository::test(fs.clone(), forge_details);
            let repo_config = given::a_repo_config();
            test_repository.on_fetch(OnFetch::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |branches, gitdir, fs| {
                    //             /--- 4 next
                    // 0 --- 1 --- 3 main
                    //        \--- 2 dev
                    // add a commit to main (0 -> 1)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.main())?;
                    // add a commit to dev ( 1 -> 2)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.dev())?;
                    // switch back to main
                    then::git_switch(&branches.main(), gitdir)?;
                    // add a second commit to main (1 -> 3)
                    then::git_log_all(gitdir)?;
                    then::create_a_commit_on_branch(fs, gitdir, &branches.main())?;
                    // add a commit to next 1 -> 4
                    then::create_a_commit_on_branch(fs, gitdir, &branches.next())?;
                    then::git_log_all(gitdir)?;
                    git::fetch::Result::Ok(())
                },
            ));
            let_assert!(
                Ok(open_repository) = test_repository.open(&gitdir),
                "open repo"
            );
            let repo_details = given::repo_details(&fs).with_gitdir(gitdir);

            //when
            let_assert!(
                Err(err) = validate(&*open_repository, &repo_details, &repo_config),
                "validate"
            );

            //then
            assert!(matches!(
                err,
                git::validation::positions::Error::UserIntervention(_)
            ));
        }

        #[test]
        fn where_next_branch_is_not_based_on_main_should_reset_next_branch_to_main_and_then_error()
        {
            //given
            let_assert!(Ok(fs) = kxio::fs::temp(), "temp fs");
            let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
            let forge_details = given::forge_details();
            let mut test_repository = git::repository::test(fs.clone(), forge_details);
            let repo_config = given::a_repo_config();
            test_repository.on_fetch(OnFetch::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |branches, gitdir, fs| {
                    //             /--- 4 dev
                    // 0 --- 1 --- 3 main
                    //        \--- 2 next
                    // add a commit to main (0 -> 1)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.main())?;
                    // add a commit to next (1 -> 2)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.next())?;
                    // switch back to main (1)
                    then::git_switch(&branches.main(), gitdir)?;
                    // add a second commit to main (1 -> 3)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.main())?;
                    // add a commit to dev (3 -> 4)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.dev())?;

                    then::git_log_all(gitdir)?;
                    git::fetch::Result::Ok(())
                },
            ));
            // second fetch as prep to push
            test_repository.on_fetch(OnFetch::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |_branches, _gitdir, _fs| {
                    // don't change anything
                    git::fetch::Result::Ok(())
                },
            ));
            test_repository.on_push(OnPush::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |_repo_details, branch_name, gitref, force, repo_branches, gitdir, fs| {
                    assert_eq!(
                        branch_name,
                        &repo_branches.next(),
                        "branch to reset should be 'next'"
                    );
                    let sha_main = then::get_sha_for_branch(fs, gitdir, &repo_branches.main())?;
                    assert_eq!(
                        gitref,
                        &git::GitRef::from(sha_main),
                        "should reset to the sha of the 'main' branch"
                    );
                    let sha_next = then::get_sha_for_branch(fs, gitdir, &repo_branches.next())?;
                    assert_eq!(
                        force,
                        &git::push::Force::From(sha_next.into()),
                        "should force push only if next is on expected sha"
                    );
                    git::push::Result::Ok(())
                },
            ));
            let_assert!(
                Ok(open_repository) = test_repository.open(&gitdir),
                "open repo"
            );
            let repo_details = given::repo_details(&fs).with_gitdir(gitdir);

            //when
            let_assert!(
                Err(err) = validate(&*open_repository, &repo_details, &repo_config),
                "validate"
            );

            //then
            println!("Got: {err:?}");
            // NOTE: assertions for correct push are in on_push above
            assert!(matches!(
                err,
                git::validation::positions::Error::Retryable(_)
            ));
        }

        #[test]
        fn where_next_branch_is_not_based_on_main_and_reset_of_next_fails_should_error() {
            //given
            let_assert!(Ok(fs) = kxio::fs::temp(), "temp fs");
            let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
            let forge_details = given::forge_details();
            let mut test_repository = git::repository::test(fs.clone(), forge_details);
            let repo_config = given::a_repo_config();
            test_repository.on_fetch(OnFetch::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |branches, gitdir, fs| {
                    //             /--- 4 dev
                    // 0 --- 1 --- 3 main
                    //        \--- 2 next
                    // add a commit to main (0 -> 1)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.main())?;
                    // add a commit to next (1 -> 2)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.next())?;
                    // switch back to main (1)
                    then::git_switch(&branches.main(), gitdir)?;
                    // add a second commit to main (1 -> 3)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.main())?;
                    // add a commit to dev (3 -> 4)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.dev())?;

                    then::git_log_all(gitdir)?;
                    git::fetch::Result::Ok(())
                },
            ));
            // second fetch as prep to push
            test_repository.on_fetch(OnFetch::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |_branches, _gitdir, _fs| {
                    // don't change anything
                    git::fetch::Result::Ok(())
                },
            ));
            test_repository.on_push(OnPush::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |_repo_details, _branch_name, _gitref, _force, _repo_branches, _gitdir, _fs| {
                    git::push::Result::Err(git::push::Error::Lock)
                },
            ));
            let_assert!(
                Ok(open_repository) = test_repository.open(&gitdir),
                "open repo"
            );
            let repo_details = given::repo_details(&fs).with_gitdir(gitdir.clone());

            //when
            let_assert!(
                Err(err) = validate(&*open_repository, &repo_details, &repo_config),
                "validate"
            );

            //then
            println!("Got: {err:?}");
            let_assert!(
                Ok(_) = then::get_sha_for_branch(&fs, &gitdir, &repo_config.branches().next()),
                "load next branch sha"
            );
            assert!(matches!(
                err,
                git::validation::positions::Error::NonRetryable(_)
            ));
        }
        #[test]
        #[allow(clippy::expect_used)]
        fn where_dev_branch_is_on_main_and_next_is_not_should_reset_next_branch_to_main_and_retryable_error(
        ) {
            //given
            let_assert!(Ok(fs) = kxio::fs::temp(), "temp fs");
            let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
            let forge_details = given::forge_details();
            let mut test_repository = git::repository::test(fs.clone(), forge_details);
            let repo_config = given::a_repo_config();
            test_repository.on_fetch(OnFetch::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |branches, gitdir, fs| {
                    //        /--- 3 next
                    // 0 --- 1  main & dev
                    // add a commit to main (0 -> 1)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.main())?;
                    // create dev branch on main (1)
                    then::git_switch(&branches.dev(), gitdir)?;
                    // switch back to main (1)
                    then::git_switch(&branches.main(), gitdir)?;
                    // add a commit to next (1 -> 3)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.next())?;

                    then::git_log_all(gitdir)?;
                    git::fetch::Result::Ok(())
                },
            ));
            // second fetch as prep to push
            test_repository.on_fetch(OnFetch::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |_branches, _gitdir, _fs| {
                    // don't change anything
                    git::fetch::Result::Ok(())
                },
            ));
            test_repository.on_push(OnPush::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |_repo_details, branch_name, gitref, force, repo_branches, gitdir, fs| {
                    assert_eq!(
                        branch_name,
                        &repo_branches.next(),
                        "branch to reset should be 'next'"
                    );
                    let sha_main = then::get_sha_for_branch(fs, gitdir, &repo_branches.main())?;
                    assert_eq!(
                        gitref,
                        &git::GitRef::from(sha_main),
                        "should reset to the sha of the 'main' branch"
                    );
                    let sha_next = then::get_sha_for_branch(fs, gitdir, &repo_branches.next())?;
                    assert_eq!(
                        force,
                        &git::push::Force::From(sha_next.into()),
                        "should force push only if next is on expected sha"
                    );
                    git::push::Result::Ok(())
                },
            ));
            let_assert!(
                Ok(open_repository) = test_repository.open(&gitdir),
                "open repo"
            );
            let repo_details = given::repo_details(&fs).with_gitdir(gitdir);

            //when
            let_assert!(
                Err(err) = validate(&*open_repository, &repo_details, &repo_config),
                "validate"
            );

            //then
            println!("Got: {err:?}");
            // NOTE: assertions for correct push are in on_push above
            assert!(matches!(
                err,
                git::validation::positions::Error::Retryable(_)
            ));
        }

        #[test]
        #[allow(clippy::expect_used)]
        fn where_dev_branch_is_not_based_on_next_should_reset_next_branch_to_next_commit_on_dev_and_retryable_error(
        ) {
            //given
            let_assert!(Ok(fs) = kxio::fs::temp(), "temp fs");
            let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
            let forge_details = given::forge_details();
            let mut test_repository = git::repository::test(fs.clone(), forge_details);
            let repo_config = given::a_repo_config();
            test_repository.on_fetch(OnFetch::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |branches, gitdir, fs| {
                    //        /--- 3 next
                    // 0 --- 1  main
                    //        \--- 2 dev
                    // add a commit to main (0 -> 1)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.main())?;
                    // add a commit to dev (1 -> 2)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.dev())?;
                    // switch back to main (1)
                    then::git_switch(&branches.main(), gitdir)?;
                    // add a commit to next (1 -> 3)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.next())?;

                    then::git_log_all(gitdir)?;
                    git::fetch::Result::Ok(())
                },
            ));
            // second fetch as prep to push
            test_repository.on_fetch(OnFetch::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |_branches, _gitdir, _fs| {
                    // don't change anything
                    git::fetch::Result::Ok(())
                },
            ));
            test_repository.on_push(OnPush::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |_repo_details, branch_name, gitref, force, repo_branches, gitdir, fs| {
                    assert_eq!(
                        branch_name,
                        &repo_branches.next(),
                        "branch to reset should be 'next'"
                    );
                    let sha_dev = then::get_sha_for_branch(fs, gitdir, &repo_branches.dev())?;
                    assert_eq!(
                        gitref,
                        &git::GitRef::from(sha_dev),
                        "should reset to the sha of the next commit on 'dev' branch"
                    );
                    let sha_next = then::get_sha_for_branch(fs, gitdir, &repo_branches.next())?;
                    assert_eq!(
                        force,
                        &git::push::Force::From(sha_next.into()),
                        "should force push only if next is on expected sha"
                    );
                    git::push::Result::Ok(())
                },
            ));
            let_assert!(
                Ok(open_repository) = test_repository.open(&gitdir),
                "open repo"
            );
            let repo_details = given::repo_details(&fs).with_gitdir(gitdir.clone());

            //when
            let_assert!(
                Ok((positions, _git_log)) =
                    validate(&*open_repository, &repo_details, &repo_config),
                "validate"
            );

            //then
            println!("positions: {positions:#?}");

            let_assert!(
                Ok(main_sha) =
                    then::get_sha_for_branch(&fs, &gitdir, &repo_config.branches().main())
            );
            assert_eq!(positions.main.sha(), &main_sha);

            let_assert!(
                Ok(next_sha) =
                    then::get_sha_for_branch(&fs, &gitdir, &repo_config.branches().next())
            );
            assert_eq!(positions.next.sha(), &next_sha);

            let_assert!(
                Ok(dev_sha) = then::get_sha_for_branch(&fs, &gitdir, &repo_config.branches().dev())
            );
            assert_eq!(positions.dev.sha(), &dev_sha);
        }

        #[test]
        fn where_branches_are_all_valid_should_return_positions() {
            //given
            let_assert!(Ok(fs) = kxio::fs::temp(), "temp fs");
            let gitdir = GitDir::new(fs.base().to_path_buf(), StoragePathType::Internal);
            let forge_details = given::forge_details();
            let mut test_repository = git::repository::test(fs.clone(), forge_details);
            let repo_config = given::a_repo_config();
            test_repository.on_fetch(OnFetch::new(
                repo_config.branches().clone(),
                gitdir.clone(),
                fs.clone(),
                |branches, gitdir, fs| {
                    // 0 --- 1  main
                    //        \--- 2 next
                    //             \--- dev
                    // add a commit to main (0 -> 1)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.main())?;
                    // add a commit to next (1 -> 2)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.next())?;
                    // add a commit to dev (2 -> 3)
                    then::create_a_commit_on_branch(fs, gitdir, &branches.dev())?;

                    then::git_log_all(gitdir)?;
                    git::fetch::Result::Ok(())
                },
            ));
            let_assert!(
                Ok(open_repository) = test_repository.open(&gitdir),
                "open repo"
            );
            let repo_details = given::repo_details(&fs).with_gitdir(gitdir.clone());

            //when
            let_assert!(
                Ok((positions, _git_log)) =
                    validate(&*open_repository, &repo_details, &repo_config),
                "validate"
            );

            //then
            println!("positions: {positions:#?}");

            let_assert!(
                Ok(main_sha) =
                    then::get_sha_for_branch(&fs, &gitdir, &repo_config.branches().main())
            );
            assert_eq!(positions.main.sha(), &main_sha);

            let_assert!(
                Ok(next_sha) =
                    then::get_sha_for_branch(&fs, &gitdir, &repo_config.branches().next())
            );
            assert_eq!(positions.next.sha(), &next_sha);

            let_assert!(
                Ok(dev_sha) = then::get_sha_for_branch(&fs, &gitdir, &repo_config.branches().dev())
            );
            assert_eq!(positions.dev.sha(), &dev_sha);
        }
    }
}