using BuildFlow.Shared.Domain.Common;
using IM.Application.Chat.Commands;
using MediatR;

namespace BuildFlow.Host.Endpoints.im.Chat;

/// <summary>
/// 撤回消息 REST 端点（SignalR 的非实时兜底通道）。
/// 权限与时间窗校验在 RecallMessageCommandHandler 内统一执行。
/// </summary>
public class RecallMessageEndpoint(IMediator mediator, ICurrentUserContext userContext) : Endpoint<RecallMessageEndpointRequest>
{
    public override void Configure() => Post("/conversations/{ConversationId}/messages/{MessageId}/recall");

    public override async Task HandleAsync(RecallMessageEndpointRequest req, CancellationToken ct)
    {
        var userId = userContext.GetRequiredUserGuid();
        await mediator.Send(new RecallMessageCommand(req.ConversationId, req.MessageId, userId), ct);
        await Send.OkAsync(ct);
    }
}