using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Hotline.Application.FlowEngine;
using Hotline.DataSharing.Province.Notifications;
using Hotline.Orders;
using Hotline.Share.Dtos.Order;
using Hotline.Share.Enums.Order;
using MapsterMapper;
using MediatR;
using Microsoft.AspNetCore.Http;
using XF.Domain.Exceptions;

namespace Hotline.Application.Handlers.Order
{
    public class ReceiveOrderNotifyHandler : IRequestHandler<ReceiveOrderNotify, AddOrderResponse>
    {
        private readonly IOrderRepository _orderRepository;
        private readonly IOrderDomainService _orderDomainService;
        private readonly IWorkflowApplication _workflowApplication;
        private readonly IMapper _mapper;

        public ReceiveOrderNotifyHandler(
            IOrderRepository orderRepository,
            IOrderDomainService orderDomainService,
            IWorkflowApplication workflowApplication,
            IMapper mapper)
        {
            _orderRepository = orderRepository;
            _orderDomainService = orderDomainService;
            _workflowApplication = workflowApplication;
            _mapper = mapper;
        }

        /// <summary>Handles a request</summary>
        /// <param name="request">The request</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Response from the request</returns>
        public async Task<AddOrderResponse> Handle(ReceiveOrderNotify request, CancellationToken cancellationToken)
        {
            var dto = request.AddOrderDto;
            if (string.IsNullOrEmpty(dto.ProvinceNo))
                throw new UserFriendlyException("无效省工单编号");

            var order = await _orderRepository.GetAsync(d => d.ProvinceNo == dto.ProvinceNo, cancellationToken);
            if (order is null)
            {
                order = _mapper.Map<Hotline.Orders.Order>(dto);
                var orderId = await _orderDomainService.AddAsync(order, cancellationToken);

                if (order.Source is ESource.ProvinceStraight)
                {
                    var orderExtension = await _orderDomainService.GetOrderExtensionsAsync(dto.ProvinceNo, cancellationToken);
                    if (orderExtension is not null)
                    {
                        orderExtension.Id = orderId;
                        await _orderDomainService.UpdateExtensionAsync(orderExtension, cancellationToken);
                    }
                }

                return new AddOrderResponse
                {
                    Id = orderId,
                    No = order.No,
                    Password = order.Password
                };
            }
            else
            {
                if (order.Source is ESource.ProvinceStraight)
                {
                    //todo 特提（撤回至发起）
                    await _workflowApplication.RecallToStartAsync(order.WorkflowId, "省工单重派", cancellationToken);
                }

                return _mapper.Map<AddOrderResponse>(order);
            }
        }
    }
}