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;

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

/// <summary>
/// <see cref="GetAnnouncementByIdQueryHandler"/> 单元测试。
/// </summary>
public sealed class GetAnnouncementByIdQueryHandlerTests
{
    [Fact]
    public async Task GivenAnnouncementMissing_WhenHandle_ThenReturnsNull()
    {
        // 1. 准备
        var announcementRepository = new Mock<ITenantAnnouncementRepository>();
        announcementRepository
            .Setup(x => x.FindByIdAsync(99, 500, It.IsAny<CancellationToken>()))
            .ReturnsAsync((TenantAnnouncement?)null);

        // 2. (空行后) 执行
        var handler = new GetAnnouncementByIdQueryHandler(announcementRepository.Object);
        var result = await handler.Handle(new GetAnnouncementByIdQuery { TenantId = 99, AnnouncementId = 500 }, CancellationToken.None);

        // 3. (空行后) 断言
        result.Should().BeNull();
    }

    [Fact]
    public async Task GivenAnnouncementExists_WhenHandle_ThenReturnsDtoWithoutReadState()
    {
        // 1. 准备
        var announcement = AnnouncementTestData.CreateAnnouncement(10, 200, 1, DateTime.UtcNow);
        var announcementRepository = new Mock<ITenantAnnouncementRepository>();
        announcementRepository
            .Setup(x => x.FindByIdAsync(200, 10, It.IsAny<CancellationToken>()))
            .ReturnsAsync(announcement);

        // 2. (空行后) 执行
        var handler = new GetAnnouncementByIdQueryHandler(announcementRepository.Object);
        var result = await handler.Handle(new GetAnnouncementByIdQuery { TenantId = 200, AnnouncementId = 10 }, CancellationToken.None);

        // 3. (空行后) 断言
        result.Should().NotBeNull();
        result!.Id.Should().Be(announcement.Id);
        result.TenantId.Should().Be(announcement.TenantId);
        result.IsRead.Should().BeFalse();
        result.ReadAt.Should().BeNull();
    }
}