using ClaudeDo.Data;
using ClaudeDo.Data.Models;
using ClaudeDo.Data.Repositories;
using ClaudeDo.Worker.External;
using ClaudeDo.Worker.Hub;
using ClaudeDo.Worker.Lifecycle;
using ClaudeDo.Worker.Queue;
using ClaudeDo.Worker.Runner;
using ClaudeDo.Worker.Tests.Infrastructure;
using ClaudeDo.Worker.Tests.Services;
using ClaudeDo.Worker.Worktrees;
using ClaudeDo.Worker.Config;
using Microsoft.Extensions.Logging.Abstractions;
using TaskStatus = ClaudeDo.Data.Models.TaskStatus;

namespace ClaudeDo.Worker.Tests.External;

public sealed class AddSubtaskToolTests : IDisposable
{
    private readonly DbFixture _db = new();
    private readonly ClaudeDoDbContext _ctx;
    private readonly TaskRepository _tasks;
    private readonly ListRepository _lists;

    public AddSubtaskToolTests()
    {
        _ctx = _db.CreateContext();
        _tasks = new TaskRepository(_ctx);
        _lists = new ListRepository(_ctx);
    }

    public void Dispose() { _ctx.Dispose(); _db.Dispose(); }

    private async Task<string> SeedListAsync()
    {
        var id = Guid.NewGuid().ToString();
        await _lists.AddAsync(new ListEntity { Id = id, Name = "L", CreatedAt = DateTime.UtcNow });
        return id;
    }

    private async Task<TaskEntity> SeedTaskAsync(string listId, TaskStatus status = TaskStatus.Idle)
    {
        var task = new TaskEntity
        {
            Id = Guid.NewGuid().ToString(),
            ListId = listId,
            Title = "t",
            Status = status,
            CreatedAt = DateTime.UtcNow,
            CommitType = "chore",
        };
        await _tasks.AddAsync(task);
        return task;
    }

    private ExternalMcpService BuildSut()
    {
        var cfg = new WorkerConfig
        {
            SandboxRoot = Path.Combine(Path.GetTempPath(), $"cd_{Guid.NewGuid():N}"),
            LogRoot = Path.Combine(Path.GetTempPath(), $"cdl_{Guid.NewGuid():N}"),
            QueueBackstopIntervalMs = 50,
        };
        var dbFactory = _db.CreateFactory();
        var hubCtx = new FakeHubContext();
        var broadcaster = new HubBroadcaster(hubCtx);
        var git = new ClaudeDo.Data.Git.GitService();
        var wtManager = new WorktreeManager(git, dbFactory, cfg, NullLogger<WorktreeManager>.Instance);
        var fake = new FakeClaudeProcess();
        var argsBuilder = new ClaudeArgsBuilder();
        var state = TaskStateServiceBuilder.Build(dbFactory).State;
        var runner = new TaskRunner(fake, dbFactory, broadcaster, wtManager, argsBuilder, cfg,
            NullLogger<TaskRunner>.Instance, state, new TaskRunTokenRegistry());
        var waker = new ClaudeDo.Worker.Queue.QueueWaker();
        var picker = new ClaudeDo.Worker.Queue.QueuePicker(dbFactory);
        var overrideSlot = new OverrideSlotService(dbFactory, runner, NullLogger<OverrideSlotService>.Instance);
        var queue = new QueueService(dbFactory, runner, cfg, NullLogger<QueueService>.Instance, waker, picker, overrideSlot, state);
        var maintenance = new WorktreeMaintenanceService(dbFactory, git, NullLogger<WorktreeMaintenanceService>.Instance);
        var merge = new TaskMergeService(dbFactory, git, broadcaster, TaskStateServiceBuilder.Build(dbFactory).State, NullLogger<TaskMergeService>.Instance);
        return new ExternalMcpService(
            _tasks, _lists, queue, broadcaster,
            state,
            git, dbFactory, maintenance, merge);
    }

    [Fact]
    public async Task AddSubtask_appends_row_with_next_order()
    {
        var listId = await SeedListAsync();
        var task = await SeedTaskAsync(listId, TaskStatus.Idle);
        var sut = BuildSut();

        await sut.AddSubtask(task.Id, "First step", null, CancellationToken.None);
        await sut.AddSubtask(task.Id, "Second step", null, CancellationToken.None);

        await using var verifyCtx = _db.CreateContext();
        var subtasks = await new SubtaskRepository(verifyCtx).GetByTaskIdAsync(task.Id);

        Assert.Equal(2, subtasks.Count);
        Assert.Equal("First step", subtasks[0].Title);
        Assert.Equal("Second step", subtasks[1].Title);
        Assert.Equal(0, subtasks[0].OrderNum);
        Assert.Equal(1, subtasks[1].OrderNum);
        Assert.False(subtasks[0].Completed);
        Assert.False(subtasks[1].Completed);
    }

    [Fact]
    public async Task AddSubtask_refuses_running_task()
    {
        var listId = await SeedListAsync();
        var task = await SeedTaskAsync(listId, TaskStatus.Running);
        var sut = BuildSut();

        await Assert.ThrowsAsync<InvalidOperationException>(
            () => sut.AddSubtask(task.Id, "Should fail", null, CancellationToken.None));
    }
}