using AutoMapper;
using Kean.Domain.Wcs.Commands;
using Kean.Domain.Wcs.Events;
using Kean.Domain.Wcs.Repositories;
using System.Threading;
using System.Threading.Tasks;

namespace Kean.Domain.Wcs.CommandHandlers
{
    /// <summary>
    /// 接受输入命令处理程序
    /// </summary>
    public sealed class AcceptInputCommandHandler : CommandHandler<AcceptInputCommand>
    {
        private readonly ICommandBus _commandBus; // 命令总线
        private readonly IMapper _mapper; // 模型映射
        private readonly IWcsRepository _wcsRepository; // 控制仓库

        /// <summary>
        /// 依赖注入
        /// </summary>
        public AcceptInputCommandHandler(
            ICommandBus commandBus,
            IWcsRepository wcsRepository,
            IMapper mapper)
        {
            _commandBus = commandBus;
            _wcsRepository = wcsRepository;
            _mapper = mapper;
        }

        /// <summary>
        /// 处理程序
        /// </summary>
        public override async Task Handle(AcceptInputCommand command, CancellationToken cancellationToken)
        {
            if (command.ValidationResult.IsValid)
            {
                var @event = _mapper.Map<AcceptInputSuccessEvent>(command);
                @event.Fallback = input => Output(nameof(command.Fallback), _mapper.Map<AcceptInputCommand>(input));
                await _commandBus.Trigger(@event, cancellationToken);

                await _wcsRepository.RemoveInput(command.Id);
            }
            else
            {
                await _commandBus.Notify(command.ValidationResult,
                    cancellationToken: cancellationToken);
            }
        }
    }
}