using IM.Application.Chat.Commands;
using IM.Application.Chat.Handlers;
using IM.Domain.Common;
using IM.Domain.Enums;
using IM.Infrastructure.Persistence;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Moq;
using Xunit;

namespace BuildFlow.IM.Tests.Chat;

/// <summary>
/// MarkMessagesReadCommandHandler 双写测试：PG 清零 + Redis 清零。
/// </summary>
public class MarkMessagesReadCommandHandlerTests
{
    private static readonly Guid ConversationId = Guid.Parse("11111111-1111-1111-1111-111111111111");
    private static readonly Guid UserId = Guid.Parse("22222222-2222-2222-2222-222222222222");

    [Fact]
    public async Task Resets_pg_unread_and_calls_redis_reset()
    {
        await using var db = BuildInMemoryDb();
        db.Conversations.Add(ImTestData.BuildConversation(ConversationId, ConversationTypeEnum.Private,
            (UserId, 7)));
        await db.SaveChangesAsync();

        var unreadCounter = new Mock<IUnreadCounter>();
        var handler = new MarkMessagesReadCommandHandler(db, unreadCounter.Object);

        await handler.Handle(
            new MarkMessagesReadCommand(ConversationId, UserId, "650000000000000000000000"),
            CancellationToken.None);

        // PG 清零
        var p = await db.ConversationParticipants.FirstAsync(x => x.UserId == UserId);
        Assert.Equal(0, p.UnreadCount);
        Assert.Equal("650000000000000000000000", p.LastReadMessageId);

        // Redis 清零被调用一次
        unreadCounter.Verify(
            c => c.ResetAsync(ConversationId, UserId, It.IsAny<CancellationToken>()),
            Times.Once);
    }

    private static ImDbContext BuildInMemoryDb()
    {
        var services = new ServiceCollection();
        services.AddDbContext<ImDbContext>(o => o.UseInMemoryDatabase($"im-read-{Guid.NewGuid()}"));
        var db = services.BuildServiceProvider().GetRequiredService<ImDbContext>();
        return db;
    }
}