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

namespace Application.Features.Api.DonationRemote.ResendAlert;

internal sealed class Handler(IAppDbContext db) : ICommandHandler<Command, Result<Response>>
{
    public async Task<Result<Response>> Handle(Command request, 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 == request.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."));
        }

        // 권한 체크 — 본인 채널 알림만 재전송 가능 (PlayNow 와 동일 패턴)
        if (alert.Donation.Channel.MemberID != request.RequesterMemberID)
        {
            return Result.Failure<Response>(Error.Forbidden("Remote.Forbidden", "권한이 없습니다."));
        }

        // 이미 큐에 있거나 재생 중이면 거부 — 그 외 종결 상태(Failed/Skipped/Ignored/Delivered) 전부 재전송 허용
        if (alert.Status is AlertStatus.Queued or AlertStatus.Playing)
        {
            return Result.Failure<Response>(Error.Problem("DonationAlert.AlreadyActive", "이미 대기 중이거나 재생 중인 알림입니다."));
        }

        alert.Resend();

        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
        ));
    }
}