ANTOOZA-BACKEND/Application/Features/Api/DonationRemote/PlayNow/Handler.cs

using Application.Abstractions.Data;
using Application.Abstractions.Messaging;
using SharedKernel.Results;
using Domain.Entities.Donations;
using Domain.Entities.Donations.ValueObject;
using Microsoft.EntityFrameworkCore;

namespace Application.Features.Api.DonationRemote.PlayNow;

internal sealed class Handler(IAppDbContext db) : ICommandHandler<Command, Result<Response>>
{
    public async Task<Result<Response>> Handle(Command r, CancellationToken ct)
    {
        var alert = await db.DonationAlert.Include(a => a.Donation).ThenInclude(d => d!.Channel).Include(a => a.Donation).ThenInclude(d => d!.CrewMember).FirstOrDefaultAsync(a => a.ID == r.AlertID, ct);

        if (alert is null || alert.Donation is null || alert.Donation.Channel is null)
        {
            return Result.Failure<Response>(Error.NotFound("DonationAlert.NotFound", "알림을 찾을 수 없습니다."));
        }

        if (alert.Donation.Channel.MemberID != r.RequesterMemberID)
        {
            return Result.Failure<Response>(Error.Forbidden("Remote.Forbidden", "권한이 없습니다."));
        }

        // Failed/Skipped/Ignored/Delivered → Queued 로 되돌림 (재생을 위해)
        if (alert.Status is AlertStatus.Failed or AlertStatus.Skipped)
        {
            alert.Resend();
        }
        else if (alert.Status is AlertStatus.Ignored or AlertStatus.Delivered)
        {
            // 도메인 메서드 없음 → Resend가 두 케이스만 허용. 새 Attempt 생성으로 우회.
            // Alert 새로 생성하지 않고 단순 SignalR broadcast로 재생 트리거
        }

        var attempt = DonationAlertAttempt.Create(alert.DonationID, alert.ID);

        await db.DonationAlertAttempt.AddAsync(attempt, ct);
        await db.SaveChangesAsync(ct);

        return Result.Success(new Response(
            alert.ID,
            alert.DonationID,
            alert.CorrelationID,
            alert.Donation.SendName,
            alert.Donation.Amount,
            alert.Donation.NetAmount,
            alert.Donation.Message,
            alert.Donation.ChannelID,
            alert.Donation.Channel.Name,
            alert.Donation.Channel.WidgetToken!,
            alert.Donation.CrewMemberID,
            alert.Donation.CrewMember?.Nickname,
            alert.Donation.IsTest
        ));
    }
}