using ClaudeDo.Data;
using ClaudeDo.Data.Models;
using ClaudeDo.Data.Repositories;
using ClaudeDo.Worker.Tests.Infrastructure;
using Microsoft.EntityFrameworkCore;
using TaskStatus = ClaudeDo.Data.Models.TaskStatus;

namespace ClaudeDo.Worker.Tests.Repositories;

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

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

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

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

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

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

    [Fact]
    public async Task TryCompleteParentAsync_AllChildrenDone_ParentBecomesDone()
    {
        var listId = await ListAsync();
        var parent = await PlannedParentAsync(listId);
        await ChildAsync(listId, parent.Id, TaskStatus.Done);
        await ChildAsync(listId, parent.Id, TaskStatus.Done);

        await _tasks.TryCompleteParentAsync(parent.Id);

        var loaded = await _tasks.GetByIdAsync(parent.Id);
        Assert.Equal(TaskStatus.Done, loaded!.Status);
        Assert.NotNull(loaded.FinishedAt);
    }

    [Fact]
    public async Task TryCompleteParentAsync_OneFailedRestDone_ParentBecomesFailed()
    {
        var listId = await ListAsync();
        var parent = await PlannedParentAsync(listId);
        await ChildAsync(listId, parent.Id, TaskStatus.Done);
        await ChildAsync(listId, parent.Id, TaskStatus.Failed);

        await _tasks.TryCompleteParentAsync(parent.Id);

        var loaded = await _tasks.GetByIdAsync(parent.Id);
        Assert.Equal(TaskStatus.Failed, loaded!.Status);
        Assert.NotNull(loaded.FinishedAt);
    }

    [Fact]
    public async Task TryCompleteParentAsync_OneStillRunning_ParentStaysPlanned()
    {
        var listId = await ListAsync();
        var parent = await PlannedParentAsync(listId);
        await ChildAsync(listId, parent.Id, TaskStatus.Done);
        await ChildAsync(listId, parent.Id, TaskStatus.Running);

        await _tasks.TryCompleteParentAsync(parent.Id);

        var loaded = await _tasks.GetByIdAsync(parent.Id);
        Assert.Equal(TaskStatus.Planned, loaded!.Status);
        Assert.Null(loaded.FinishedAt);
    }

    [Fact]
    public async Task TryCompleteParentAsync_ChildStillDraft_ParentStaysPlanned()
    {
        var listId = await ListAsync();
        var parent = await PlannedParentAsync(listId);
        await ChildAsync(listId, parent.Id, TaskStatus.Done);
        await ChildAsync(listId, parent.Id, TaskStatus.Draft);

        await _tasks.TryCompleteParentAsync(parent.Id);

        var loaded = await _tasks.GetByIdAsync(parent.Id);
        Assert.Equal(TaskStatus.Planned, loaded!.Status);
    }

    [Fact]
    public async Task TryCompleteParentAsync_ParentIsNotPlanned_NoChange()
    {
        var listId = await ListAsync();
        var parent = await PlannedParentAsync(listId);
        await _ctx.Database.ExecuteSqlRawAsync("UPDATE tasks SET status = 'planning' WHERE id = {0}", parent.Id);
        await ChildAsync(listId, parent.Id, TaskStatus.Done);

        await _tasks.TryCompleteParentAsync(parent.Id);

        var loaded = await _tasks.GetByIdAsync(parent.Id);
        Assert.Equal(TaskStatus.Planning, loaded!.Status);
    }
}