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

namespace Kean.Domain.Basic.CommandHandlers
{
    /// <summary>
    /// 创建物料命令处理程序
    /// </summary>
    public sealed class CreateItemCommandHandler : CommandHandler<CreateItemCommand>
    {
        private readonly ICommandBus _commandBus; // 命令总线
        private readonly IMapper _mapper; // 模型映射
        private readonly IInterfaceRecordRepository _interfaceRecordRepository;

        /// <summary>
        /// 依赖注入
        /// </summary>
        public CreateItemCommandHandler(
            ICommandBus commandBus,
            IInterfaceRecordRepository interfaceRecordRepository,
            IMapper mapper)
        {
            _commandBus = commandBus;
            _mapper = mapper;
            _interfaceRecordRepository = interfaceRecordRepository;
        }

        /// <summary>
        /// 处理程序
        /// </summary>
        public override async Task Handle(CreateItemCommand command, CancellationToken cancellationToken)
        {
            if (await _interfaceRecordRepository.IsItemListCodeExist(command.Code, string.Empty))
            {
                await _commandBus.Notify(nameof(command.Code), "物料类型重复", command.Code, nameof(ErrorCode.Conflict),
                    cancellationToken: cancellationToken);
                return;
            }
            if (await _interfaceRecordRepository.IsItemListNameExist(command.Name, string.Empty))
            {
                await _commandBus.Notify(nameof(command.Name), "物料类型名称重复", command.Name, nameof(ErrorCode.Conflict),
                    cancellationToken: cancellationToken);
                return;
            }

            Output(nameof(command.ItemListId), await _interfaceRecordRepository.CreateItem(_mapper.Map<Item>(command)));
        }
    }
}