using Microsoft.Extensions.Logging;
using NSubstitute;
using PnvPanel.Application.Admin.Billing;
using PnvPanel.Application.Admin.Users;
using PnvPanel.Application.Billing;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Common.Models;
using PnvPanel.Application.Tests.TestSupport;
using Xunit;

namespace PnvPanel.Application.Tests.Admin.Billing;

public class GrantBillingGiftCommandHandlerTests
{
    private readonly IIdentityService _identityService = Substitute.For<IIdentityService>();
    private readonly IXuiPanelGateway _gateway = Substitute.For<IXuiPanelGateway>();
    private readonly IRealtimeNotifier _notifier = Substitute.For<IRealtimeNotifier>();
    private readonly ITelegramNotifier _telegramNotifier = Substitute.For<ITelegramNotifier>();
    private readonly ILogger<GrantBillingGiftCommandHandler> _logger = Substitute.For<
        ILogger<GrantBillingGiftCommandHandler>
    >();

    private static CurrentUserProfile Profile(Guid userId, bool billingEnabled, DateTimeOffset? paidUntil) =>
        new(
            userId,
            "alice",
            Guid.NewGuid(),
            "premium",
            IsActivated: true,
            IsBlocked: false,
            MaxConfigs: 5,
            MaxIpLimit: 3,
            SubscriptionToken: "sub-token",
            BillingEnabled: billingEnabled,
            BillingPaidUntil: paidUntil,
            BillingSuspended: false
        );

    [Fact]
    public async Task Handle_WhenBillingEnabled_ExtendsPaidUntilAndNotifiesUser()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var adminId = Guid.NewGuid();
        var userId = Guid.NewGuid();
        _identityService
            .GetProfileAsync(userId, Arg.Any<CancellationToken>())
            .Returns(Profile(userId, billingEnabled: true, paidUntil: null));
        _identityService
            .ExtendBillingPaidUntilAsync(userId, Arg.Any<DateTimeOffset>(), Arg.Any<CancellationToken>())
            .Returns(Result.Success());

        var handler = new GrantBillingGiftCommandHandler(
            dbContext,
            _identityService,
            _gateway,
            _notifier,
            _telegramNotifier,
            FakeCurrentUser.Authenticated(adminId, "admin"),
            _logger
        );

        var before = DateTimeOffset.UtcNow;
        var result = await handler.Handle(new GrantBillingGiftCommand(userId, 30), CancellationToken.None);

        Assert.True(result.IsSuccess);
        await _identityService
            .Received(1)
            .ExtendBillingPaidUntilAsync(
                userId,
                Arg.Is<DateTimeOffset>(d => d >= before.AddDays(30).AddMinutes(-1)),
                Arg.Any<CancellationToken>()
            );
        await _telegramNotifier
            .Received(1)
            .NotifyUserAsync(
                userId,
                Arg.Is<string>(m => m!.Contains("30")),
                Arg.Any<string?>(),
                Arg.Any<CancellationToken>()
            );
    }

    [Fact]
    public async Task Handle_WhenBillingNotEnabled_ReturnsNotEnabled()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();
        _identityService
            .GetProfileAsync(userId, Arg.Any<CancellationToken>())
            .Returns(Profile(userId, billingEnabled: false, paidUntil: null));

        var handler = new GrantBillingGiftCommandHandler(
            dbContext,
            _identityService,
            _gateway,
            _notifier,
            _telegramNotifier,
            FakeCurrentUser.Authenticated(Guid.NewGuid(), "admin"),
            _logger
        );

        var result = await handler.Handle(new GrantBillingGiftCommand(userId, 30), CancellationToken.None);

        Assert.False(result.IsSuccess);
        Assert.Equal(BillingErrors.NotEnabled, result.Error);
    }

    [Fact]
    public async Task Handle_WhenUserNotFound_ReturnsUserNotFound()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();
        _identityService
            .GetProfileAsync(userId, Arg.Any<CancellationToken>())
            .Returns((CurrentUserProfile?)null);

        var handler = new GrantBillingGiftCommandHandler(
            dbContext,
            _identityService,
            _gateway,
            _notifier,
            _telegramNotifier,
            FakeCurrentUser.Authenticated(Guid.NewGuid(), "admin"),
            _logger
        );

        var result = await handler.Handle(new GrantBillingGiftCommand(userId, 30), CancellationToken.None);

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