using System.Text;
using ModuleCore.Calendar;
using ModuleCore.Git;
using ModuleTests.Git.TestData;

namespace ModuleTests.Git;

public class AddRegistrationTests
{
	private static readonly VerifySettings Settings;

	static AddRegistrationTests()
	{
		Settings = new VerifySettings();
		var testBaseDirectory = Path.Join(TestConstants.SnapshotFolderName, nameof(AddRegistrationTests));

		Settings.UseDirectory(testBaseDirectory);
		Settings.DisableDiff();
	}

	[Theory]
	[ClassData(typeof(AddRegistrationTestData))]
	public Task BasicRepoRegistration((int testId, string path) testData)
	{
		Settings.UseFileName($"{nameof(BasicRepoRegistration)}_{testData.testId}");

		var gitManager = GitManager.InternalFreshInstance(nameof(BasicRepoRegistration));

		var repoRegistration = gitManager.RegisterRepo("Test:/some/test/repo", testData.path);
		var sb = new StringBuilder();
		sb.AppendLine($"Attempted to register: {testData.path}")
			.AppendLine($"Registration result: {repoRegistration}");

		gitManager.DeleteDatabase();

		return Verify(sb, Settings);
	}

	[Fact]
	public void RepoRegistrationWithEmptyName()
	{
		Settings.UseFileName(nameof(RepoRegistrationWithEmptyName));

		var gitManager = GitManager.InternalFreshInstance(nameof(RepoRegistrationWithEmptyName));
		var testRepoAbsolutePath = "Test:/some/test/repo";

		var emptyName = gitManager.RegisterRepo(testRepoAbsolutePath, "");

		gitManager.DeleteDatabase();

		Assert.Equal("repo", emptyName);
	}

	[Fact]
	public void RepoRegistrationWithNullName()
	{
		Settings.UseFileName(nameof(RepoRegistrationWithNullName));

		var gitManager = GitManager.InternalFreshInstance(nameof(RepoRegistrationWithNullName));
		var testRepoAbsolutePath = "Test:/some/test/repo";

		// Name is technically not-nullable, but string is a reference type so null can be passed in so we should test
		// it regardless
		var nullName = gitManager.RegisterRepo(testRepoAbsolutePath, null!);

		gitManager.DeleteDatabase();

		Assert.Equal("repo", nullName);
	}

	[Fact]
	public void RepoRegistrationWithWhitespaceName()
	{
		Settings.UseFileName(nameof(RepoRegistrationWithWhitespaceName));

		var gitManager = GitManager.InternalFreshInstance(nameof(RepoRegistrationWithWhitespaceName));
		var testRepoAbsolutePath = "Test:/some/test/repo";

		var whitespaceName = gitManager.RegisterRepo(testRepoAbsolutePath, "            ");

		gitManager.DeleteDatabase();

		Assert.Equal("repo", whitespaceName);
	}

	[Fact]
	public void DuplicateRepoRegistrationShouldFail()
	{
		Settings.UseFileName(nameof(RepoRegistrationWithWhitespaceName));

		var gitManager = GitManager.InternalFreshInstance(nameof(RepoRegistrationWithWhitespaceName));
		var testRepoAbsolutePath = "Test:/some/test/repo";
		string[] paths = ["test", "nested", "path"];
		var names = (NormalSeparator: string.Join(Path.DirectorySeparatorChar, paths), AltSeparator: string.Join(Path.AltDirectorySeparatorChar, paths));

		var firstRegistration = gitManager.RegisterRepo(testRepoAbsolutePath, names.NormalSeparator);
		// TODO: make nested registrations fail in both directions and test
		var secondRegistration = gitManager.RegisterRepo(testRepoAbsolutePath, Path.Combine(paths[..1]));

		Assert.Equal(Path.Combine(paths), firstRegistration);
		Assert.Equal(Path.Combine(paths[..1]), secondRegistration);

		Assert.Throws<Exception>(() => gitManager.RegisterRepo(testRepoAbsolutePath, Path.Combine(paths[..1])));

		gitManager.DeleteDatabase();
	}

	[Fact]
	public void DuplicateRepoRegistrationDifferentSlashShouldNotFail()
	{
		Settings.UseFileName(nameof(RepoRegistrationWithWhitespaceName));

		var gitManager = GitManager.InternalFreshInstance(nameof(RepoRegistrationWithWhitespaceName));
		var testRepoAbsolutePath = "Test:/some/test/repo";
		string[] paths = ["test", "nested", "path"];
		var names = (NormalSeparator: string.Join(Path.DirectorySeparatorChar, paths), AltSeparator: string.Join(Path.AltDirectorySeparatorChar, paths));

		var firstRegistration = gitManager.RegisterRepo(testRepoAbsolutePath, names.NormalSeparator);
		// TODO: make nested registrations fail in both directions and test
		var secondRegistration = gitManager.RegisterRepo(testRepoAbsolutePath, Path.Combine(paths[..1]));
		var differentPathSeparatorRegistration = gitManager.RegisterRepo(testRepoAbsolutePath, names.AltSeparator);

		gitManager.DeleteDatabase();

		Assert.Equal(Path.Combine(paths), firstRegistration);
		Assert.Equal(Path.Combine(paths[..1]), secondRegistration);
		Assert.Equal(names.AltSeparator, differentPathSeparatorRegistration);
	}
}