using BuildFlow.Application.AiModel.Handlers;
using BuildFlow.Application.AiModel.Queries;
using BuildFlow.Domain.Entities.AiModel;
using BuildFlow.Domain.Enums;
using BuildFlow.Infrastructure.Persistence;
using FluentAssertions;
using Microsoft.EntityFrameworkCore;
using Xunit;

namespace BuildFlow.Rag.Tests;

/// <summary>
/// 查询 AI 模型列表处理器测试。覆盖全量返回与按类型筛选。
/// </summary>
public class GetAiModelsQueryHandlerTests
{
    [Fact]
    public async Task Handle_ReturnsAllModelsOrdered()
    {
        await using var db = CreateDb();
        SeedModel(db, Guid.NewGuid(), "Chat-A", ModelTypeEnum.Chat);
        SeedModel(db, Guid.NewGuid(), "Embed-B", ModelTypeEnum.Embedding);
        await db.SaveChangesAsync();

        var handler = new GetAiModelsQueryHandler(db);
        var result = await handler.Handle(new GetAiModelsQuery(null), CancellationToken.None);

        result.Should().HaveCount(2);
    }

    [Fact]
    public async Task Handle_FiltersByModelType()
    {
        await using var db = CreateDb();
        SeedModel(db, Guid.NewGuid(), "Chat-A", ModelTypeEnum.Chat);
        SeedModel(db, Guid.NewGuid(), "Embed-B", ModelTypeEnum.Embedding);
        await db.SaveChangesAsync();

        var handler = new GetAiModelsQueryHandler(db);
        var result = await handler.Handle(new GetAiModelsQuery((int)ModelTypeEnum.Chat), CancellationToken.None);

        result.Should().HaveCount(1);
        result[0].ModelType.Should().Be((int)ModelTypeEnum.Chat);
    }

    private static void SeedModel(RagDbContext db, Guid id, string name, ModelTypeEnum type)
    {
        db.AiModels.Add(new AiModelEntity
        {
            Id = id,
            Name = name,
            Provider = ModelProviderEnum.LMStudio,
            ModelId = name,
            BaseUrl = "http://localhost:1234/v1",
            ApiKey = "lm-studio",
            ModelType = type,
            CreatedBy = "test",
            UpdatedBy = "test",
            OperatorIP = "127.0.0.1",
        });
    }

    private static RagDbContext CreateDb()
    {
        var options = new DbContextOptionsBuilder<RagDbContext>()
            .UseInMemoryDatabase($"rag-get-aimodels-{Guid.NewGuid():N}")
            .Options;
        var db = new RagDbContext(options);
        db.SavingChanges += (_, _) => RagTestDb.FillAudit(db);
        return db;
    }
}