using NSubstitute;
using PnvPanel.Application.Admin.Users;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Common.Models;
using PnvPanel.Application.Tests.TestSupport;
using PnvPanel.Domain.Billing;
using PnvPanel.Domain.Plans;
using Xunit;

namespace PnvPanel.Application.Tests.Admin.Users;

public class ListUsersQueryHandlerTests
{
    private readonly IIdentityService _identityService = Substitute.For<IIdentityService>();

    private static UserSummaryDto Summary(Guid id, int configQuota = 3, Guid? planId = null) =>
        new(
            id,
            "alice",
            "premium",
            true,
            false,
            DateTimeOffset.UtcNow,
            true,
            DateTimeOffset.UtcNow.AddDays(-1),
            configQuota,
            planId
        );

    [Fact]
    public async Task Handle_WhenUserHasAwaitingConfirmationSubscriptionRequest_SetsBillingPendingReview()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();
        var request = PaymentRequest.Create(userId, PaymentPeriod.Quarter, 1000);
        request.MarkPaymentSent();
        dbContext.PaymentRequests.Add(request);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        _identityService
            .ListUsersAsync(1, 20, null, null, null, null, null, Arg.Any<CancellationToken>())
            .Returns(new PagedList<UserSummaryDto>([Summary(userId)], 1, 1, 20));

        var handler = new ListUsersQueryHandler(_identityService, dbContext);

        var result = await handler.Handle(new ListUsersQuery(1, 20, null, null, null, null, null), CancellationToken.None);

        Assert.True(result.IsSuccess);
        Assert.True(result.Value.Items.Single().BillingPendingReview);
    }

    [Fact]
    public async Task Handle_WhenNoPendingRequest_LeavesBillingPendingReviewFalse()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();

        _identityService
            .ListUsersAsync(1, 20, null, null, null, null, null, Arg.Any<CancellationToken>())
            .Returns(new PagedList<UserSummaryDto>([Summary(userId)], 1, 1, 20));

        var handler = new ListUsersQueryHandler(_identityService, dbContext);

        var result = await handler.Handle(new ListUsersQuery(1, 20, null, null, null, null, null), CancellationToken.None);

        Assert.True(result.IsSuccess);
        Assert.False(result.Value.Items.Single().BillingPendingReview);
    }

    [Fact]
    public async Task Handle_WhenPendingRequestIsPlanChangeTopUp_LeavesBillingPendingReviewFalse()
    {
        // PlanChangeTopUp — доплата за смену тарифа, не подписка; не должна показывать пользователя
        // как "оплата на проверке" в админке (см. CLAUDE.md про Kind).
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();
        var request = PaymentRequest.CreatePlanChangeTopUp(userId, 500);
        request.MarkPaymentSent();
        dbContext.PaymentRequests.Add(request);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        _identityService
            .ListUsersAsync(1, 20, null, null, null, null, null, Arg.Any<CancellationToken>())
            .Returns(new PagedList<UserSummaryDto>([Summary(userId)], 1, 1, 20));

        var handler = new ListUsersQueryHandler(_identityService, dbContext);

        var result = await handler.Handle(new ListUsersQuery(1, 20, null, null, null, null, null), CancellationToken.None);

        Assert.True(result.IsSuccess);
        Assert.False(result.Value.Items.Single().BillingPendingReview);
    }

    [Fact]
    public async Task Handle_WhenUserHasCatalogPlan_FillsPlanName()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var plan = Plan.Create("Плюс", 6, 1);
        dbContext.Plans.Add(plan);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        _identityService
            .ListUsersAsync(1, 20, null, null, null, null, null, Arg.Any<CancellationToken>())
            .Returns(
                new PagedList<UserSummaryDto>(
                    [Summary(Guid.NewGuid(), configQuota: 6, planId: plan.Id)],
                    1,
                    1,
                    20
                )
            );

        var handler = new ListUsersQueryHandler(_identityService, dbContext);

        var result = await handler.Handle(new ListUsersQuery(1, 20, null, null, null, null, null), CancellationToken.None);

        Assert.True(result.IsSuccess);
        var item = result.Value.Items.Single();
        Assert.Equal("Плюс", item.PlanName);
        Assert.Equal(6, item.ConfigQuota);
    }

    [Fact]
    public async Task Handle_WhenQuotaIsCustom_LeavesPlanNameNull()
    {
        using var dbContext = InMemoryDbContextFactory.Create();

        _identityService
            .ListUsersAsync(1, 20, null, null, null, null, null, Arg.Any<CancellationToken>())
            .Returns(
                new PagedList<UserSummaryDto>([Summary(Guid.NewGuid(), configQuota: 12)], 1, 1, 20)
            );

        var handler = new ListUsersQueryHandler(_identityService, dbContext);

        var result = await handler.Handle(new ListUsersQuery(1, 20, null, null, null, null, null), CancellationToken.None);

        Assert.True(result.IsSuccess);
        var item = result.Value.Items.Single();
        Assert.Null(item.PlanName);
        Assert.Equal(12, item.ConfigQuota);
    }
}