using Grpc.Core;
using Mishima.Nexus.Wire.V1;
using Robotico.Result.Errors;
using Xunit;

namespace Robotico.Nexus.Client.Tests;

public class NexusWireStatusTests
{
    [Fact]
    public void ToResult_Succeeds_WhenStatusIsOk()
    {
        Robotico.Result.Result result = NexusWireStatus.ToResult(new NexusStatus { Code = "OK" });

        Assert.True(result.IsSuccess());
    }

    [Fact]
    public void ToResult_Fails_WhenStatusIsNull()
    {
        Robotico.Result.Result result = NexusWireStatus.ToResult((NexusStatus?)null);

        Assert.True(result.IsError(out IError? error));
        Assert.Equal(NexusErrors.WireFailed, error!.Code);
    }

    [Fact]
    public void ToResult_Fails_WithCodeAndMessage_FromStatus()
    {
        Robotico.Result.Result result = NexusWireStatus.ToResult(new NexusStatus { Code = "NXS_FOO", Message = "boom" });

        Assert.True(result.IsError(out IError? error));
        Assert.Equal("NXS_FOO", error!.Code);
        Assert.Equal("boom", error.Message);
    }

    [Fact]
    public void ToResult_Fails_WithFallbackCodeAndMessage_WhenBlank()
    {
        Robotico.Result.Result result = NexusWireStatus.ToResult(new NexusStatus { Code = string.Empty, Message = string.Empty });

        Assert.True(result.IsError(out IError? error));
        Assert.Equal(NexusErrors.WireFailed, error!.Code);
        Assert.Equal("Nexus call failed.", error.Message);
    }

    [Fact]
    public void ToResultGeneric_CarriesValue_OnSuccess()
    {
        Robotico.Result.Result<int> result = NexusWireStatus.ToResult(new NexusStatus { Code = "OK" }, 42);

        Assert.True(result.IsSuccess(out int value, out _));
        Assert.Equal(42, value);
    }

    [Fact]
    public void ToResultGeneric_PropagatesError_OnFailure()
    {
        Robotico.Result.Result<int> result = NexusWireStatus.ToResult(new NexusStatus { Code = "NXS_BAD", Message = "bad" }, 42);

        Assert.True(result.IsError(out IError? error));
        Assert.Equal("NXS_BAD", error!.Code);
    }

    [Fact]
    public void IsOk_True_ForOkStatus()
    {
        Assert.True(NexusWireStatus.IsOk(new NexusStatus { Code = "OK" }));
    }

    [Fact]
    public void IsOk_False_ForNullOrNonOkStatus()
    {
        Assert.False(NexusWireStatus.IsOk(null));
        Assert.False(NexusWireStatus.IsOk(new NexusStatus { Code = "NXS_BAD" }));
    }

    [Theory]
    [InlineData(StatusCode.OK, NexusErrors.WireFailed)]
    [InlineData(StatusCode.Cancelled, NexusErrors.Unavailable)]
    [InlineData(StatusCode.Unknown, NexusErrors.WireFailed)]
    [InlineData(StatusCode.InvalidArgument, NexusErrors.InvalidArgument)]
    [InlineData(StatusCode.DeadlineExceeded, NexusErrors.Unavailable)]
    [InlineData(StatusCode.NotFound, NexusErrors.NotFound)]
    [InlineData(StatusCode.AlreadyExists, NexusErrors.AlreadyExists)]
    [InlineData(StatusCode.PermissionDenied, NexusErrors.WireFailed)]
    [InlineData(StatusCode.ResourceExhausted, NexusErrors.Unavailable)]
    [InlineData(StatusCode.FailedPrecondition, NexusErrors.InvalidArgument)]
    [InlineData(StatusCode.Aborted, NexusErrors.WireFailed)]
    [InlineData(StatusCode.OutOfRange, NexusErrors.InvalidArgument)]
    [InlineData(StatusCode.Unimplemented, NexusErrors.WireFailed)]
    [InlineData(StatusCode.Internal, NexusErrors.WireFailed)]
    [InlineData(StatusCode.Unavailable, NexusErrors.Unavailable)]
    [InlineData(StatusCode.DataLoss, NexusErrors.WireFailed)]
    [InlineData(StatusCode.Unauthenticated, NexusErrors.WireFailed)]
    public void FromException_MapsEveryGrpcStatusCode(StatusCode statusCode, string expectedCode)
    {
        RpcException exception = new(new Status(statusCode, "detail message"));

        IError error = NexusWireStatus.FromException(exception);

        Assert.Equal(expectedCode, error.Code);
        Assert.Contains("detail message", error.Message, StringComparison.Ordinal);
    }

    [Fact]
    public void FromException_FallsBackTo_ExceptionMessage_WhenDetailBlank()
    {
        RpcException exception = new(new Status(StatusCode.Internal, string.Empty));

        IError error = NexusWireStatus.FromException(exception);

        Assert.Contains(exception.Message, error.Message, StringComparison.Ordinal);
    }
}