using BuildFlow.Shared.Domain.Errors;
using BuildFlow.Shared.Domain.Exceptions;
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>
/// GetConversationParticipantIdsQueryHandler：成员返回参与者 ID 列表；请求者非参与者拒绝（Forbidden）。
/// </summary>
public class GetConversationParticipantIdsQueryHandlerTests
{
    private static readonly Guid UserId = Guid.Parse("22222222-2222-2222-2222-222222222222");
    private static readonly Guid Other = Guid.Parse("33333333-3333-3333-3333-333333333333");
    private static readonly Guid ConvId = Guid.Parse("11111111-1111-1111-1111-111111111111");

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

        var handler = new GetConversationParticipantIdsQueryHandler(db);
        var result = await handler.Handle(new GetConversationParticipantIdsQuery(ConvId, UserId), CancellationToken.None);

        result.Should().BeEquivalentTo(new[] { UserId, Other });
    }

    [Fact]
    public async Task Throws_forbidden_when_requester_not_participant()
    {
        await using var db = IMTestDb.Create();
        db.Conversations.Add(ImTestData.BuildConversation(ConvId, ConversationTypeEnum.Private, (Other, 0)));
        await db.SaveChangesAsync();

        var handler = new GetConversationParticipantIdsQueryHandler(db);
        var act = async () => await handler.Handle(new GetConversationParticipantIdsQuery(ConvId, UserId), CancellationToken.None);

        var ex = await act.Should().ThrowAsync<UnauthorizedException>();
        ex.Which.Code.Should().Be(ErrorCode.Forbidden);
    }
}