using System.Linq;
using System.Threading.Tasks;
using FluentValidation;
using MediatR;
using Microsoft.Extensions.DependencyInjection;
using NUnit.Framework;
using ReC.Application.RecActions.Commands;
using ReC.Application.Results.Queries;

namespace ReC.Tests.Application.RecActions;

[TestFixture]
public class InvokeBatchDuplicateGuardTests : RecApplicationTestBase
{
    private const long ProfileId = 3;

    private (ISender Sender, IServiceScope Scope) CreateScopedSender()
    {
        var scope = ServiceProvider.CreateScope();
        var sender = scope.ServiceProvider.GetRequiredService<ISender>();
        return (sender, scope);
    }

    [Test]
    public async Task Invoke_with_existing_batchId_throws_ValidationException()
    {
        var (sender, scope) = CreateScopedSender();
        using var _ = scope;

        // Arrange: read an existing result to get a real BatchId from the database
        var results = await sender.Send(new ReadResultViewQuery
        {
            ProfileId = ProfileId,
            IncludeAction = false,
            LastBatch = true
        });

        var existingBatchId = results.FirstOrDefault()?.BatchId;
        Assert.That(existingBatchId, Is.Not.Null.And.Not.Empty,
            $"No results with a BatchId found for ProfileId {ProfileId}. Ensure test data exists in the database.");

        // Act & Assert: invoking with the same BatchId should throw ValidationException
        var ex = Assert.ThrowsAsync<ValidationException>(async () =>
            await sender.Send(new InvokeBatchRecActionViewsCommand
            {
                ProfileId = ProfileId,
                References = new InvokeReferences
                {
                    BatchId = existingBatchId!
                }
            }));

        Assert.That(ex!.Errors.Any(e => e.PropertyName.Contains("BatchId")));
    }

    [Test]
    public void Invoke_with_new_batchId_does_not_throw_duplicate_guard()
    {
        var (sender, scope) = CreateScopedSender();
        using var _ = scope;

        var uniqueBatchId = $"test-{System.Guid.NewGuid():N}";

        // This should NOT throw ValidationException for duplicate BatchId.
        // It may throw other exceptions (e.g., no actions found, endpoint errors),
        // but the duplicate guard should pass.
        try
        {
            sender.Send(new InvokeBatchRecActionViewsCommand
            {
                ProfileId = ProfileId,
                References = new InvokeReferences
                {
                    BatchId = uniqueBatchId
                }
            }).GetAwaiter().GetResult();
        }
        catch (ValidationException valEx) when (valEx.Errors.Any(e => e.PropertyName.Contains("BatchId")))
        {
            Assert.Fail("Duplicate guard should not trigger for a unique BatchId.");
        }
        catch
        {
            // Other exceptions (endpoint errors, etc.) are acceptable
        }
    }
}