TakeoutSaaS.TenantApi/tests/TakeoutSaaS.Application.Tests/App/Tenants/Handlers/GetAnnouncementByIdQueryHandlerTests.cs

using FluentAssertions;
using Moq;
using TakeoutSaaS.Application.App.Tenants.Handlers;
using TakeoutSaaS.Application.App.Tenants.Queries;
using TakeoutSaaS.Application.Tests.TestUtilities;
using TakeoutSaaS.Domain.Tenants.Entities;
using TakeoutSaaS.Domain.Tenants.Repositories;
using TakeoutSaaS.Shared.Abstractions.Security;
using TakeoutSaaS.Shared.Abstractions.Tenancy;

namespace TakeoutSaaS.Application.Tests.App.Tenants.Handlers;

public sealed class GetAnnouncementByIdQueryHandlerTests
{
    [Fact]
    public async Task GivenAnnouncementMissing_WhenHandle_ThenReturnsNull()
    {
        // Arrange
        var tenantProvider = new Mock<ITenantProvider>();
        tenantProvider.Setup(x => x.GetCurrentTenantId()).Returns(99);

        var announcementRepository = new Mock<ITenantAnnouncementRepository>();
        announcementRepository
            .Setup(x => x.FindByIdAsync(99, 500, It.IsAny<CancellationToken>()))
            .ReturnsAsync((TenantAnnouncement?)null);

        var readRepository = new Mock<ITenantAnnouncementReadRepository>();

        var handler = new GetAnnouncementByIdQueryHandler(
            announcementRepository.Object,
            readRepository.Object,
            tenantProvider.Object);

        // Act
        var result = await handler.Handle(new GetAnnouncementByIdQuery { AnnouncementId = 500 }, CancellationToken.None);

        // Assert
        result.Should().BeNull();
    }

    [Fact]
    public async Task GivenTargetNotMatched_WhenHandle_ThenReturnsNullAndSkipsReadLookup()
    {
        // Arrange
        var tenantProvider = new Mock<ITenantProvider>();
        tenantProvider.Setup(x => x.GetCurrentTenantId()).Returns(100);

        var currentUserAccessor = new Mock<ICurrentUserAccessor>();
        currentUserAccessor.SetupGet(x => x.UserId).Returns(123);
        currentUserAccessor.SetupGet(x => x.IsAuthenticated).Returns(true);

        var announcement = AnnouncementTestData.CreateAnnouncement(1, 100, 1, DateTime.UtcNow);
        announcement.TargetType = "SPECIFIC_USERS";
        announcement.TargetParameters = "{\"userIds\":[999]}";

        var announcementRepository = new Mock<ITenantAnnouncementRepository>();
        announcementRepository
            .Setup(x => x.FindByIdAsync(100, 1, It.IsAny<CancellationToken>()))
            .ReturnsAsync(announcement);

        var readRepository = new Mock<ITenantAnnouncementReadRepository>();

        var handler = new GetAnnouncementByIdQueryHandler(
            announcementRepository.Object,
            readRepository.Object,
            tenantProvider.Object,
            currentUserAccessor.Object);

        // Act
        var result = await handler.Handle(new GetAnnouncementByIdQuery { AnnouncementId = 1 }, CancellationToken.None);

        // Assert
        result.Should().BeNull();
        readRepository.Verify(x => x.GetByAnnouncementAsync(
            It.IsAny<long>(),
            It.IsAny<IEnumerable<long>>(),
            It.IsAny<long?>(),
            It.IsAny<CancellationToken>()), Times.Never);
    }

    [Fact]
    public async Task GivenUserReadRecord_WhenHandle_ThenReturnsDtoWithReadState()
    {
        // Arrange
        var tenantProvider = new Mock<ITenantProvider>();
        tenantProvider.Setup(x => x.GetCurrentTenantId()).Returns(200);

        var currentUserAccessor = new Mock<ICurrentUserAccessor>();
        currentUserAccessor.SetupGet(x => x.UserId).Returns(321);
        currentUserAccessor.SetupGet(x => x.IsAuthenticated).Returns(true);

        var announcement = AnnouncementTestData.CreateAnnouncement(10, 200, 1, DateTime.UtcNow);
        var readAt = DateTime.UtcNow.AddMinutes(-3);

        var announcementRepository = new Mock<ITenantAnnouncementRepository>();
        announcementRepository
            .Setup(x => x.FindByIdAsync(200, 10, It.IsAny<CancellationToken>()))
            .ReturnsAsync(announcement);

        var readRepository = new Mock<ITenantAnnouncementReadRepository>();
        readRepository
            .Setup(x => x.GetByAnnouncementAsync(200, It.IsAny<IEnumerable<long>>(), 321, It.IsAny<CancellationToken>()))
            .ReturnsAsync(new List<TenantAnnouncementRead>
            {
                new() { AnnouncementId = 10, TenantId = 200, UserId = 321, ReadAt = readAt }
            });

        var handler = new GetAnnouncementByIdQueryHandler(
            announcementRepository.Object,
            readRepository.Object,
            tenantProvider.Object,
            currentUserAccessor.Object);

        // Act
        var result = await handler.Handle(new GetAnnouncementByIdQuery { AnnouncementId = 10 }, CancellationToken.None);

        // Assert
        result.Should().NotBeNull();
        result!.IsRead.Should().BeTrue();
        result.ReadAt.Should().BeCloseTo(readAt, TimeSpan.FromSeconds(1));
    }
}