using Application.Abstractions.Data;
using Application.Abstractions.Messaging;
using Microsoft.EntityFrameworkCore;

namespace Application.Features.Admin.Channel.List.Delete;

public sealed class Handler(IAppDbContext db) : ICommandHandler<Command>
{
    public async Task Handle(Command request, CancellationToken ct)
    {
        if (request.IDs is null || request.IDs.Length < 1)
        {
            return;
        }

        var list = await db.Channel.Where(c => request.IDs.Contains(c.ID)).ToListAsync(ct);

        if (list.Count < 1)
        {
            return;
        }

        if (await db.Order.AnyAsync(c => c.ChannelID.HasValue && request.IDs.Contains(c.ChannelID.Value), ct))
            throw new InvalidOperationException("상점 주문 내역이 존재하는 채널은 삭제할 수 없습니다.");

        db.Channel.RemoveRange(list);

        await db.SaveChangesAsync(ct);
    }
}