using BBWYB.Client.APIServices;
using BBWYB.Client.Models;
using BBWYB.Client.Views.Purchase;
using BBWYB.Common.Trigger;
using CommunityToolkit.Mvvm.Input;
using CommunityToolkit.Mvvm.Messaging;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;

namespace BBWYB.Client.ViewModels
{
    public class OnlinePurchaseViewModel : BaseVM
    {
        public ICommand FastCreateOrderCommand { get; set; }
        public ICommand PreviewOrderCommand { get; set; }

        public IList<PurchaseSchemeProductSku> PurchaseSchemeProductSkuList { get; set; }

        public bool IsLoading { get => isLoading; set { SetProperty(ref isLoading, value); } }

        public decimal ProductAmount { get => productAmount; set { SetProperty(ref productAmount, value); } }
        public decimal FreightAmount { get => freightAmount; set { SetProperty(ref freightAmount, value); } }
        public decimal TotalAmount { get => totalAmount; set { SetProperty(ref totalAmount, value); } }
        public string ContactName { get => contactName; set { SetProperty(ref contactName, value); } }
        public string Address { get => address; set { SetProperty(ref address, value); } }
        public string Mobile { get => mobile; set { SetProperty(ref mobile, value); } }
        public string Province { get => province; set { SetProperty(ref province, value); } }
        public string City { get => city; set { SetProperty(ref city, value); } }
        public string County { get => county; set { SetProperty(ref county, value); } }
        public string Town { get => town; set { SetProperty(ref town, value); } }
        public string PrucahseRemark { get => prucahseRemark; set { SetProperty(ref prucahseRemark, value); } }

        public PurchaseOrderMode PurchaseOrderMode
        {
            get => purchaseOrderMode; set
            {
                if (SetProperty(ref purchaseOrderMode, value))
                    OnDelayTriggerExecute(Guid.NewGuid().ToString());
            }
        }

        private Purchaser purchaser;
        private Order order;
        private PurchaseAccount purchaseAccount;

        private IList<PurchaseScheme> purchaseSchemeList;
        private OrderViewModel orderVM;
        private GlobalContext globalContext;
        private bool isLoading;
        private PurchaseService purchaseService;
        private PurchaseOrderService purchaseOrderService;
        private PurchaseProductAPIService purchaseProductAPIService;
        private DelayTrigger delayTrigger;

        private decimal productAmount;
        private decimal freightAmount;
        private decimal totalAmount;
        private string contactName;
        private string address;
        private string mobile;
        private string province;
        private string city;
        private string county;
        private string town;
        private string prucahseRemark;
        private PurchaseOrderMode purchaseOrderMode = PurchaseOrderMode.代发;
        /// <summary>
        /// 扩展数据，暂用于拳探
        /// </summary>
        private string extensions;

        public OnlinePurchaseViewModel(PurchaseService purchaseService,
                                       PurchaseOrderService purchaseOrderService,
                                       PurchaseProductAPIService purchaseProductAPIService,
                                       GlobalContext globalContext,
                                       OrderViewModel orderVM)
        {
            this.purchaseOrderService = purchaseOrderService;
            this.purchaseProductAPIService = purchaseProductAPIService;
            this.purchaseService = purchaseService;
            this.delayTrigger = new DelayTrigger();
            this.delayTrigger.OnExecute = OnDelayTriggerExecute;
            PurchaseSchemeProductSkuList = new ObservableCollection<PurchaseSchemeProductSku>();
            purchaseSchemeList = new List<PurchaseScheme>();
            FastCreateOrderCommand = new RelayCommand(FastCreateOrder);
            PreviewOrderCommand = new RelayCommand(PreviewOrder);
            this.globalContext = globalContext;
            this.orderVM = orderVM;
            //PurchaseOrderMode = PurchaseOrderMode.代发;
        }

        public void SetData(Order order, Purchaser purchaser, PurchaseAccount purchaseAccount)
        {
            this.order = order;
            this.purchaser = purchaser;
            this.purchaseAccount = purchaseAccount;

            this.ContactName = order.Consignee.ContactName;
            this.Address = order.Consignee.Address;
            this.Province = order.Consignee.Province;
            this.City = order.Consignee.City;
            this.County = order.Consignee.County;
            this.Town = order.Consignee.Town;
            this.Mobile = order.Consignee.Mobile;
        }

        protected override void Load()
        {
            IsLoading = true;

            Task.Factory.StartNew(() => purchaseService.GetPurchaseSchemeList(order.ItemList.Select(osku => osku.SkuId).ToList(), purchaser.Id, globalContext.User.Shop.ShopId))
                        .ContinueWith(r =>
                        {
                            var purchaseSchemeResponse = r.Result;
                            if (!purchaseSchemeResponse.Success)
                            {
                                IsLoading = false;
                                App.Current.Dispatcher.Invoke(() => MessageBox.Show(purchaseSchemeResponse.Msg, "获取采购方案"));
                                return;
                            }

                            var waitList = new List<WaitHandle>();
                            foreach (var purchaseSchemeApiModel in purchaseSchemeResponse.Data)
                            {
                                var purchaseScheme = PurchaseScheme.Convert(purchaseSchemeApiModel);
                                purchaseSchemeList.Add(purchaseScheme);
                                foreach (var purchaseSchemeProduct in purchaseScheme.PurchaseSchemeProductList)
                                {
                                    var ewh = new ManualResetEvent(false);
                                    waitList.Add(ewh);
                                    var orderSku = order.ItemList.FirstOrDefault(osku => osku.SkuId == purchaseScheme.SkuId);
                                    Task.Factory.StartNew(() => LoadPurchaseProduct(purchaseScheme.PurchasePlatform, purchaseSchemeProduct, orderSku, ewh));
                                }
                            }

                            WaitHandle.WaitAll(waitList.ToArray());
                            //IsLoading = false;
                            if (PurchaseSchemeProductSkuList.Count() > 0)
                                OnDelayTriggerExecute(Guid.NewGuid().ToString());
                            else
                            {
                                IsLoading = false;
                                App.Current.Dispatcher.Invoke(() => MessageBox.Show("采购方案商品加载失败,请重新打开预览窗口", "提示"));
                            }
                        });
        }

        protected override void Unload()
        {
            order = null;
            purchaser = null;
            purchaseAccount = null;

            purchaseSchemeList.Clear();
            PurchaseSchemeProductSkuList.Clear();
            extensions = string.Empty;
            ProductAmount = FreightAmount = TotalAmount = 0;
            ContactName = Address = Mobile = Province = City = County = Town = PrucahseRemark = string.Empty;
        }

        private void LoadPurchaseProduct(Platform platform, PurchaseSchemeProduct purchaseSchemeProduct, OrderSku orderSku, ManualResetEvent ewh)
        {
            var data = purchaseProductAPIService.GetProductInfo(platform,
                                                                purchaseSchemeProduct.ProductId,
                                                                purchaseSchemeProduct.SkuId,
                                                                purchaseSchemeProduct.PurchaseProductId,
                                                                PurchaseOrderMode,
                                                                PurchaseProductAPIMode.Spider);
            if (data != null && data.Value.purchaseSchemeProductSkus != null && data.Value.purchaseSchemeProductSkus.Count > 0)
            {
                App.Current.Dispatcher.Invoke(() =>
                {
                    foreach (var purchaseSchemeProductSku in data.Value.purchaseSchemeProductSkus)
                    {
                        if (purchaseSchemeProduct.SelectedSkuIdList.Any(s => s == purchaseSchemeProductSku.PurchaseSkuId))
                        {
                            PurchaseSchemeProductSkuList.Add(purchaseSchemeProductSku);
                            purchaseSchemeProductSku.ItemTotal = orderSku.ItemTotal;
                            purchaseSchemeProductSku.OnItemTotalChanged = OnItemTotalChanged;
                        }
                    }
                });
            }

            ewh.Set();
            ewh.Dispose();
        }


        private void OnItemTotalChanged(int itemTotal)
        {
            Console.WriteLine($"OnItemTotalChanged {DateTime.Now} {itemTotal}");
            this.delayTrigger.SetKey(itemTotal.ToString());
        }

        private void OnDelayTriggerExecute(string key)
        {
            if (string.IsNullOrEmpty(key))
            {
                IsLoading = false;
                return;
            }

            if (string.IsNullOrEmpty(ContactName) ||
                string.IsNullOrEmpty(Address) ||
                string.IsNullOrEmpty(Mobile) ||
                string.IsNullOrEmpty(Province) ||
                string.IsNullOrEmpty(City) ||
                string.IsNullOrEmpty(County))
            {
                IsLoading = false;
                MessageBox.Show("缺少完整的收货信息", "提示");
                return;
            }

            IsLoading = true;
            Task.Factory.StartNew(() => purchaseOrderService.PreviewPurchaseOrder(new Consignee()
            {
                Address = Address,
                City = City,
                ContactName = ContactName,
                County = County,
                Mobile = Mobile,
                Province = Province,
                TelePhone = Mobile,
                Town = Town
            }, PurchaseSchemeProductSkuList, purchaseAccount.PurchasePlatformId, purchaseAccount, PurchaseOrderMode))
                        .ContinueWith(t =>
                        {
                            IsLoading = false;
                            var r = t.Result;
                            if (!r.Success)
                            {
                                ProductAmount = FreightAmount = TotalAmount = 0;
                                extensions = string.Empty;
                                App.Current.Dispatcher.Invoke(() => MessageBox.Show(r.Msg, "预览订单报价"));
                                return;
                            }
                            ProductAmount = r.Data.ProductAmount;
                            FreightAmount = r.Data.FreightAmount;
                            TotalAmount = r.Data.TotalAmount;
                            //tradeMode = r.Data.OrderTradeType?.Code;
                            extensions = r.Data.Extensions;
                        });
        }

        private void FastCreateOrder()
        {
            if (IsLoading)
                return;
            if (TotalAmount == 0)
            {
                MessageBox.Show("总金额为0不能提交订单", "提示");
                return;
            }
            if (string.IsNullOrEmpty(Mobile) ||
                string.IsNullOrEmpty(Address) ||
                string.IsNullOrEmpty(City) ||
                string.IsNullOrEmpty(Province) ||
                string.IsNullOrEmpty(County) ||
                string.IsNullOrEmpty(Town) ||
                string.IsNullOrEmpty(ContactName))
            {
                MessageBox.Show("收货人信息不全", "下单");
                return;
            }
            if (string.IsNullOrEmpty(extensions))
            {
                MessageBox.Show("缺少报价扩展数据", "下单");
                return;
            }

            IsLoading = true;
            Task.Factory.StartNew(() => purchaseOrderService.FastCreateOrder(new Consignee()
            {
                Address = Address,
                City = City,
                ContactName = ContactName,
                County = County,
                Mobile = Mobile,
                Province = Province,
                TelePhone = Mobile,
                Town = Town
            }, PurchaseSchemeProductSkuList,
               purchaseAccount.PurchasePlatformId,
               purchaseAccount,
               PurchaseOrderMode,
               PrucahseRemark,
               order.Id,
               globalContext.User.Shop.ShopId,
               purchaseSchemeList[0].PurchaserName,
               extensions)).ContinueWith(t =>
                  {
                      IsLoading = false;
                      var r = t.Result;
                      if (!r.Success)
                      {
                          App.Current.Dispatcher.Invoke(() => MessageBox.Show(r.Msg, "下单"));
                          return;
                      }

                      //刷新订单列表
                      //orderListViewModel.RefreshOrder(order.Id);
                      orderVM.RefreshOrder(order.Id);

                      //关闭当前窗口
                      //GalaSoft.MvvmLight.Messaging.Messenger.Default.Send<object>(null, "OnlinePurchase_Close");
                      WeakReferenceMessenger.Default.Send(new Message_OnlinePurchase_Close(null));
                  });
        }

        private void PreviewOrder()
        {
            OnDelayTriggerExecute(Guid.NewGuid().ToString());
        }
    }
}