using FluentAssertions;
using IM.Application.Chat.Handlers;
using IM.Application.Chat.Queries;
using IM.Domain.Enums;
using IM.Infrastructure.Persistence;
using Xunit;

namespace BuildFlow.IM.Tests.Chat;

/// <summary>
/// GetUserConversationIdsQueryHandler 成功路径：按用户聚合其参与的会话 ID。无鉴权分支，仅覆盖正常/空结果。
/// </summary>
public class GetUserConversationIdsQueryHandlerTests
{
    private static readonly Guid UserId = Guid.Parse("22222222-2222-2222-2222-222222222222");
    private static readonly Guid ConvA = Guid.Parse("11111111-1111-1111-1111-111111111111");
    private static readonly Guid ConvB = Guid.Parse("33333333-3333-3333-3333-333333333333");

    [Fact]
    public async Task Returns_all_conversation_ids_for_user()
    {
        await using var db = IMTestDb.Create();
        db.Conversations.Add(ImTestData.BuildConversation(ConvA, ConversationTypeEnum.Private, (UserId, 0)));
        db.Conversations.Add(ImTestData.BuildConversation(ConvB, ConversationTypeEnum.Group, (UserId, 0)));
        await db.SaveChangesAsync();

        var handler = new GetUserConversationIdsQueryHandler(db);
        var result = await handler.Handle(new GetUserConversationIdsQuery(UserId), CancellationToken.None);

        result.Should().BeEquivalentTo(new[] { ConvA, ConvB });
    }

    [Fact]
    public async Task Returns_empty_when_user_has_no_conversations()
    {
        await using var db = IMTestDb.Create();
        var handler = new GetUserConversationIdsQueryHandler(db);
        var result = await handler.Handle(new GetUserConversationIdsQuery(UserId), CancellationToken.None);

        result.Should().BeEmpty();
    }
}