using Xunit;
using Moq;
using KArtSell.Modules.IdentityAccess.ManageIdentityAndRoles.Features.RegisterIdentity;

namespace KArtSell.IdentityAccess.UnitTests.ManageIdentityAndRoles;

public class RegisterIdentityHandlerTests
{
    private readonly Mock<IRegisterIdentitySql> _sqlMock;
    private readonly RegisterIdentityHandler _handler;

    public RegisterIdentityHandlerTests()
    {
        _sqlMock = new Mock<IRegisterIdentitySql>();
        _handler = new RegisterIdentityHandler(_sqlMock.Object);
    }

    [Fact]
    public async Task HandleAsync_ValidRequest_CreatesIdentity()
    {
        var request = new RegisterIdentityRequest
        {
            Email = "test@example.com",
            DisplayName = "Test User"
        };

        var identityId = Guid.NewGuid();
        _sqlMock.Setup(s => s.EmailExistsAsync("test@example.com", It.IsAny<CancellationToken>()))
            .ReturnsAsync(false);
        _sqlMock.Setup(s => s.CreateIdentityAsync(It.IsAny<Guid>(), "test@example.com", "Test User", It.IsAny<string>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(identityId);
        _sqlMock.Setup(s => s.GetIdentityAsync(identityId, It.IsAny<CancellationToken>()))
            .ReturnsAsync((identityId, "test@example.com", "Test User", Domain.IdentityState.Active));

        var response = await _handler.HandleAsync(request, CancellationToken.None);

        Assert.NotNull(response);
        Assert.Equal(identityId, response.Id);
        Assert.Equal("test@example.com", response.Email);
        Assert.Equal(Domain.IdentityState.Active, response.State);
    }

    [Fact]
    public async Task HandleAsync_InvalidEmail_ThrowsValidationException()
    {
        var request = new RegisterIdentityRequest
        {
            Email = "invalid-email",
            DisplayName = "Test User"
        };

        await Assert.ThrowsAsync<ValidationException>(() => _handler.HandleAsync(request, CancellationToken.None));
    }

    [Fact]
    public async Task HandleAsync_EmailExists_ThrowsValidationException()
    {
        var request = new RegisterIdentityRequest
        {
            Email = "existing@example.com",
            DisplayName = "Test User"
        };

        _sqlMock.Setup(s => s.EmailExistsAsync("existing@example.com", It.IsAny<CancellationToken>()))
            .ReturnsAsync(true);

        await Assert.ThrowsAsync<ValidationException>(() => _handler.HandleAsync(request, CancellationToken.None));
    }

    [Fact]
    public async Task HandleAsync_EmptyDisplayName_ThrowsValidationException()
    {
        var request = new RegisterIdentityRequest
        {
            Email = "test@example.com",
            DisplayName = ""
        };

        await Assert.ThrowsAsync<ValidationException>(() => _handler.HandleAsync(request, CancellationToken.None));
    }
}