using NSubstitute;
using PnvPanel.Application.Auth;
using PnvPanel.Application.Common.Behaviors;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Common.Messaging;
using PnvPanel.Application.Common.Models;
using Xunit;

namespace PnvPanel.Application.Tests.Common.Behaviors;

public class RequireActivationBehaviorTests
{
    private sealed record DummyRequest : IRequiresActivation;

    private readonly ICurrentUser _currentUser = Substitute.For<ICurrentUser>();
    private readonly IIdentityService _identityService = Substitute.For<IIdentityService>();

    private RequireActivationBehavior<DummyRequest, Result<string>> CreateBehavior() =>
        new(_currentUser, _identityService);

    private static CurrentUserProfile CreateProfile(Guid userId, bool isActivated) =>
        new(
            userId,
            "alice",
            Guid.NewGuid(),
            "user",
            IsActivated: isActivated,
            IsBlocked: false,
            MaxConfigs: 3,
            MaxIpLimit: RoleQuota.Unlimited,
            SubscriptionToken: "sub-token",
            BillingEnabled: false,
            BillingPaidUntil: null,
            BillingSuspended: false
        );

    [Fact]
    public async Task Handle_WhenActivated_CallsNext()
    {
        var userId = Guid.NewGuid();
        _currentUser.UserId.Returns(userId);
        _identityService
            .GetProfileAsync(userId, Arg.Any<CancellationToken>())
            .Returns(CreateProfile(userId, isActivated: true));

        var result = await CreateBehavior()
            .Handle(
                new DummyRequest(),
                () => Task.FromResult(Result.Success("ok")),
                CancellationToken.None
            );

        Assert.True(result.IsSuccess);
        Assert.Equal("ok", result.Value);
    }

    [Fact]
    public async Task Handle_WhenNotActivated_ReturnsNotActivatedWithoutCallingNext()
    {
        var userId = Guid.NewGuid();
        _currentUser.UserId.Returns(userId);
        _identityService
            .GetProfileAsync(userId, Arg.Any<CancellationToken>())
            .Returns(CreateProfile(userId, isActivated: false));
        var nextCalled = false;

        var result = await CreateBehavior()
            .Handle(
                new DummyRequest(),
                () =>
                {
                    nextCalled = true;
                    return Task.FromResult(Result.Success("ok"));
                },
                CancellationToken.None
            );

        Assert.False(result.IsSuccess);
        Assert.Equal(AuthErrors.NotActivated, result.Error);
        Assert.False(nextCalled);
    }

    [Fact]
    public async Task Handle_WhenNoCurrentUser_ReturnsUnauthorized()
    {
        _currentUser.UserId.Returns((Guid?)null);

        var result = await CreateBehavior()
            .Handle(
                new DummyRequest(),
                () => Task.FromResult(Result.Success("ok")),
                CancellationToken.None
            );

        Assert.False(result.IsSuccess);
        Assert.Equal(AuthErrors.Unauthorized, result.Error);
    }

    [Fact]
    public async Task Handle_WhenProfileMissing_ReturnsUnauthorized()
    {
        var userId = Guid.NewGuid();
        _currentUser.UserId.Returns(userId);
        _identityService
            .GetProfileAsync(userId, Arg.Any<CancellationToken>())
            .Returns((CurrentUserProfile?)null);

        var result = await CreateBehavior()
            .Handle(
                new DummyRequest(),
                () => Task.FromResult(Result.Success("ok")),
                CancellationToken.None
            );

        Assert.False(result.IsSuccess);
        Assert.Equal(AuthErrors.Unauthorized, result.Error);
    }
}