using Furniture.Bff.Application.Adapters;
using Furniture.Bff.Application.DependencyInjection;
using Furniture.Bff.Application.Grpc;
using Furniture.Bff.Application.Handlers;
using Furniture.Bff.Contracts.Api;
using Furniture.Service.Contracts.UseCases;
using Microsoft.Extensions.DependencyInjection;

namespace Furniture.Bff.Application.UnitTests;

public class RuntimeWiringTests
{
    [Fact]
    public async Task AddFurnitureBffApplicationRuntime_WhenResolved_WiresHandler()
    {
        var services = new ServiceCollection();
        services.AddFurnitureBffApplicationRuntime();
        services.AddSingleton<IFurnitureServiceClient, FakeFurnitureServiceClient>();

        using var provider = services.BuildServiceProvider();
        var handler = provider.GetRequiredService<IGetFurnitureAvailabilityHandler>();

        var response = await handler.HandleAsync(new GetFurnitureAvailabilityApiRequest("FUR-001", "corr-123"));

        Assert.Equal("FUR-001", response.FurnitureId);
        Assert.Equal("Chair", response.DisplayName);
        Assert.Equal(7, response.QuantityAvailable);
    }

    [Fact]
    public void FurnitureAvailabilityEdgeGrpcContractAdapter_WhenMapped_PreservesValues()
    {
        var adapter = new FurnitureAvailabilityEdgeGrpcContractAdapter();
        var request = new GetFurnitureAvailabilityApiRequest("FUR-002", "corr-456");

        var grpcContract = adapter.ToGrpc(request);
        var roundtrip = adapter.FromGrpc(grpcContract);

        Assert.Equal("FUR-002", roundtrip.FurnitureId);
        Assert.Equal("corr-456", roundtrip.CorrelationId);
    }

    [Fact]
    public void FurnitureAvailabilityEdgeGrpcContractAdapter_WhenCorrelationMissing_GeneratesCorrelation()
    {
        var adapter = new FurnitureAvailabilityEdgeGrpcContractAdapter();
        var grpcContract = new GetFurnitureAvailabilityEdgeGrpcContract("FUR-003", string.Empty);

        var mapped = adapter.FromGrpc(grpcContract);

        Assert.Equal("FUR-003", mapped.FurnitureId);
        Assert.NotEmpty(mapped.CorrelationId);
    }

    private sealed class FakeFurnitureServiceClient : IFurnitureServiceClient
    {
        public Task<GetFurnitureAvailabilityResponse> GetAvailabilityAsync(GetFurnitureAvailabilityRequest request)
        {
            return Task.FromResult(new GetFurnitureAvailabilityResponse(request.FurnitureId, "Chair", 7));
        }
    }
}