using NSubstitute;
using PnvPanel.Application.Activation;
using PnvPanel.Application.Admin.Activation;
using PnvPanel.Application.Auth;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Common.Models;
using PnvPanel.Application.Tests.TestSupport;
using PnvPanel.Domain.Activation;
using Xunit;

namespace PnvPanel.Application.Tests.Activation;

public class ApproveActivationCommandHandlerTests
{
    private readonly IIdentityService _identityService = Substitute.For<IIdentityService>();
    private readonly IRealtimeNotifier _notifier = Substitute.For<IRealtimeNotifier>();
    private readonly ITelegramNotifier _telegramNotifier = Substitute.For<ITelegramNotifier>();
    private readonly ICurrentUser _currentUser = Substitute.For<ICurrentUser>();

    [Fact]
    public async Task Handle_WhenPending_ApprovesActivatesUserAndNotifies()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var adminId = Guid.NewGuid();
        var request = ActivationRequest.Create(Guid.NewGuid(), "please");
        dbContext.ActivationRequests.Add(request);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        _currentUser.UserId.Returns(adminId);
        _identityService
            .ActivateUserAsync(request.UserId, adminId, Arg.Any<CancellationToken>())
            .Returns(Result.Success());

        var handler = new ApproveActivationCommandHandler(
            dbContext,
            _identityService,
            _notifier,
            _telegramNotifier,
            _currentUser
        );

        var result = await handler.Handle(
            new ApproveActivationCommand(request.Id),
            CancellationToken.None
        );

        Assert.True(result.IsSuccess);
        Assert.Equal(ActivationStatus.Approved, request.Status);
        await _notifier
            .Received(1)
            .NotifyUserActivatedAsync(request.UserId, Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_WhenRequestNotFound_ReturnsNotFound()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        _currentUser.UserId.Returns(Guid.NewGuid());

        var handler = new ApproveActivationCommandHandler(
            dbContext,
            _identityService,
            _notifier,
            _telegramNotifier,
            _currentUser
        );

        var result = await handler.Handle(
            new ApproveActivationCommand(Guid.NewGuid()),
            CancellationToken.None
        );

        Assert.False(result.IsSuccess);
        Assert.Equal(ActivationErrors.NotFound, result.Error);
    }

    [Fact]
    public async Task Handle_WhenAlreadyDecided_ReturnsConflict()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var request = ActivationRequest.Create(Guid.NewGuid(), null);
        request.Approve(Guid.NewGuid());
        dbContext.ActivationRequests.Add(request);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        _currentUser.UserId.Returns(Guid.NewGuid());

        var handler = new ApproveActivationCommandHandler(
            dbContext,
            _identityService,
            _notifier,
            _telegramNotifier,
            _currentUser
        );

        var result = await handler.Handle(
            new ApproveActivationCommand(request.Id),
            CancellationToken.None
        );

        Assert.False(result.IsSuccess);
        Assert.Equal(ActivationErrors.AlreadyDecided, result.Error);
    }

    [Fact]
    public async Task Handle_WhenActivateUserFails_PropagatesFailureWithoutNotifying()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var adminId = Guid.NewGuid();
        var request = ActivationRequest.Create(Guid.NewGuid(), null);
        dbContext.ActivationRequests.Add(request);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        _currentUser.UserId.Returns(adminId);
        var failure = Error.NotFound("User.NotFound", "Пользователь не найден.");
        _identityService
            .ActivateUserAsync(request.UserId, adminId, Arg.Any<CancellationToken>())
            .Returns(Result.Failure(failure));

        var handler = new ApproveActivationCommandHandler(
            dbContext,
            _identityService,
            _notifier,
            _telegramNotifier,
            _currentUser
        );

        var result = await handler.Handle(
            new ApproveActivationCommand(request.Id),
            CancellationToken.None
        );

        Assert.False(result.IsSuccess);
        Assert.Equal(failure, result.Error);
        await _notifier
            .DidNotReceive()
            .NotifyUserActivatedAsync(Arg.Any<Guid>(), Arg.Any<CancellationToken>());
    }
}