using ClaudeDo.Data.Models;
using ClaudeDo.Data.Repositories;
using ClaudeDo.Worker.Hub;
using ClaudeDo.Worker.Runner;
using ClaudeDo.Worker.Tests.Infrastructure;
using Microsoft.AspNetCore.Http;
using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
using Xunit;

namespace ClaudeDo.Worker.Tests;

public sealed class SuggestImprovementTests : IDisposable
{
    private readonly DbFixture _db = new();
    public void Dispose() => _db.Dispose();

    private static TaskRunMcpContextAccessor AccessorFor(string callerTaskId)
    {
        var http = new HttpContextAccessor { HttpContext = new DefaultHttpContext() };
        http.HttpContext!.Items["TaskRunContext"] = new TaskRunMcpContext { CallerTaskId = callerTaskId };
        return new TaskRunMcpContextAccessor(http);
    }

    private async Task SeedCallerAsync(string id, string? parentId)
    {
        using var ctx = _db.CreateContext();
        if (!ctx.Lists.Any())
            ctx.Lists.Add(new ListEntity { Id = "l1", Name = "L", CreatedAt = DateTime.UtcNow });
        ctx.Tasks.Add(new TaskEntity { Id = id, ListId = "l1", Title = "Caller",
            Status = TaskStatus.Running, ParentTaskId = parentId, CommitType = "feat", CreatedAt = DateTime.UtcNow });
        await ctx.SaveChangesAsync();
    }

    [Fact]
    public async Task SuggestImprovement_stamps_parent_createdBy_status_and_list()
    {
        await SeedCallerAsync("caller", parentId: null);
        using var ctx = _db.CreateContext();
        var svc = new TaskRunMcpService(new TaskRepository(ctx), AccessorFor("caller"),
            new HubBroadcaster(new CapturingHubContext()));
        var dto = await svc.SuggestImprovement("Refactor X", "details", model: null, default);
        var child = await new TaskRepository(ctx).GetByIdAsync(dto.ChildTaskId);
        Assert.Equal("caller", child!.ParentTaskId);
        Assert.Equal("caller", child.CreatedBy);
        Assert.Equal(TaskStatus.Idle, child.Status);
        Assert.Equal("l1", child.ListId);
        Assert.Null(child.Model);
    }

    [Fact]
    public async Task SuggestImprovement_persists_normalized_model()
    {
        await SeedCallerAsync("caller", parentId: null);
        using var ctx = _db.CreateContext();
        var svc = new TaskRunMcpService(new TaskRepository(ctx), AccessorFor("caller"),
            new HubBroadcaster(new CapturingHubContext()));
        var dto = await svc.SuggestImprovement("Refactor X", "details", model: "HAIKU", default);
        var child = await new TaskRepository(ctx).GetByIdAsync(dto.ChildTaskId);
        Assert.Equal("haiku", child!.Model);
    }

    [Fact]
    public async Task SuggestImprovement_rejects_unknown_model()
    {
        await SeedCallerAsync("caller", parentId: null);
        using var ctx = _db.CreateContext();
        var svc = new TaskRunMcpService(new TaskRepository(ctx), AccessorFor("caller"),
            new HubBroadcaster(new CapturingHubContext()));
        await Assert.ThrowsAsync<ArgumentException>(
            () => svc.SuggestImprovement("x", "y", model: "gpt4", default));
    }

    [Fact]
    public async Task SuggestImprovement_rejects_when_caller_is_a_child()
    {
        await SeedCallerAsync("parent", parentId: null);
        await SeedCallerAsync("child", parentId: "parent");
        using var ctx = _db.CreateContext();
        var svc = new TaskRunMcpService(new TaskRepository(ctx), AccessorFor("child"),
            new HubBroadcaster(new CapturingHubContext()));
        await Assert.ThrowsAsync<InvalidOperationException>(
            () => svc.SuggestImprovement("nested", "x", model: null, default));
    }
}