using BBWY.Client.APIServices;
using BBWY.Client.Models;
using BBWY.Client.Views.BatchPurchase;
using BBWY.Common.Trigger;
using GalaSoft.MvvmLight.Command;
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 BBWY.Client.ViewModels
{
    public class BatchPurchaseCreateNewOrderViewModel : BaseVM
    {
        private GlobalContext globalContext;
        private PurchaseProductAPIService purchaseProductAPIService;
        private PurchaseService purchaseService;
        private BatchPurchaseService batchPurchaseService;
        private DelayTrigger delayTrigger;

        private bool isLoading;
        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;

        private string tradeMode;
        private string extensions;

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

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

        public PurchaseOrderMode PurchaseOrderMode
        {
            get => purchaseOrderMode; set
            {
                if (Set(ref purchaseOrderMode, value))
                    OnDelayTriggerExecute(Guid.NewGuid().ToString());
            }
        }
        public IList<ProductSkuWithScheme> ProductSkuWithSchemeList { get; set; }


        public ICommand FastCreateOrderCommand { get; set; }
        public ICommand PreviewOrderCommand { get; set; }
        public ICommand AddProductSkuCommand { get; set; }
        public ICommand DeleteProductSkuWithSchemeCommand { get; set; }

        public ICommand EditQuantityRatioCommand { get; set; }

        public ICommand AddQuantityCommand { get; set; }

        public ICommand SubtractQuantityCommand { get; set; }

        public BatchPurchaseCreateNewOrderViewModel(PurchaseProductAPIService purchaseProductAPIService,
                                                    PurchaseService purchaseService,
                                                    GlobalContext globalContext,
                                                    BatchPurchaseService batchPurchaseService)
        {
            this.globalContext = globalContext;
            this.purchaseProductAPIService = purchaseProductAPIService;
            this.purchaseService = purchaseService;
            this.batchPurchaseService = batchPurchaseService;
            ProductSkuWithSchemeList = new ObservableCollection<ProductSkuWithScheme>();

            FastCreateOrderCommand = new RelayCommand(FastCreateOrder);
            PreviewOrderCommand = new RelayCommand(PreviewOrder);
            AddProductSkuCommand = new RelayCommand(AddProductSku);
            DeleteProductSkuWithSchemeCommand = new RelayCommand<ProductSkuWithScheme>(DeleteProductSkuWithScheme);
            EditQuantityRatioCommand = new RelayCommand<object>(EditQuantityRatio);
            AddQuantityCommand = new RelayCommand<PurchaseSchemeProductSku>(AddQuantity);
            SubtractQuantityCommand = new RelayCommand<PurchaseSchemeProductSku>(SubtractQuantity);
            this.delayTrigger = new DelayTrigger();
            this.delayTrigger.OnExecute = OnDelayTriggerExecute;
        }

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

            if (ProductSkuWithSchemeList.Count() == 0)
            {
                ProductAmount = 0;
                FreightAmount = 0;
                TotalAmount = 0;
                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(() => batchPurchaseService.PreviewOrder(ProductSkuWithSchemeList, new Consignee()
            {
                Address = Address,
                City = City,
                ContactName = ContactName,
                County = County,
                Mobile = Mobile,
                Province = Province,
                TelePhone = Mobile,
                Town = Town
            }, this.PurchaseOrderMode, globalContext.User.Shop.PurchaseAccountList))
                        .ContinueWith(t =>
                        {
                            IsLoading = false;
                            var r = t.Result;
                            if (!r.Success)
                            {
                                ProductAmount = FreightAmount = TotalAmount = 0;
                                tradeMode = 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 PreviewOrder()
        {
            OnDelayTriggerExecute(Guid.NewGuid().ToString());
        }

        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;
            }

            //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,
            //   tradeMode,
            //   PrucahseRemark,
            //   order.Id,
            //   globalContext.User.Shop.ShopId,
            //   purchaseAccount.Id,
            //   purchaseAccount.AccountName,
            //   purchaseSchemeList[0].PurchaserName,
            //   purchaser.Id,
            //   globalContext.User.Shop.PlatformCommissionRatio ?? 0.05M,
            //   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);

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

        private void AddProductSku()
        {
            var addProductSkuWindow = new BatchPurchaseAddProductSku();
            if (addProductSkuWindow.ShowDialog() != true)
                return;

            var newProductSkuWithSchemeList = addProductSkuWindow.SelectedProductSkuWithSchemeList;
            var waitList = new List<EventWaitHandle>();
            foreach (var newProductSkuWithScheme in newProductSkuWithSchemeList)
            {
                if (ProductSkuWithSchemeList.Any(item => item.SkuId == newProductSkuWithScheme.SkuId))
                    continue;
                ProductSkuWithSchemeList.Add(newProductSkuWithScheme);
                var ewh = new ManualResetEvent(false);
                waitList.Add(ewh);
                Task.Factory.StartNew(() => LoadPurchaseScheme(newProductSkuWithScheme, ewh));
            }
            if (waitList.Count() == 0)
                return;
            IsLoading = true;
            Task.Factory.StartNew(() =>
            {
                WaitHandle.WaitAll(waitList.ToArray());
                PreviewOrder(); //预览订单
            });
        }

        private void LoadPurchaseScheme(ProductSkuWithScheme productSkuWithScheme, EventWaitHandle ewh)
        {
            try
            {
                #region 加载采购方案
                var purchaseSchemeResponse = purchaseService.GetPurchaseSchemeList(shopId: globalContext.User.Shop.ShopId, schemeId: productSkuWithScheme.PurchaseSchemeId);
                if (!purchaseSchemeResponse.Success)
                {
                    App.Current.Dispatcher.Invoke(() => MessageBox.Show($"方案Id{productSkuWithScheme.PurchaseSchemeId}\r\n{purchaseSchemeResponse.Msg}", "加载采购方案失败"));
                    return;
                }

                var purchaseScheme = purchaseSchemeResponse.Data[0];
                #endregion

                #region 完善采购方案基本信息
                foreach (var purchaseSchemeProduct in purchaseScheme.PurchaseSchemeProductList)
                {
                    var data = purchaseProductAPIService.GetProductInfo(productSkuWithScheme.PurchasePlatform.Value,
                                                                        productSkuWithScheme.ProductId,
                                                                        productSkuWithScheme.SkuId,
                                                                        purchaseSchemeProduct.PurchaseProductId,
                                                                        PurchaseOrderMode.批发,
                                                                        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.PurchaseSchemeProductSkuList.Any(s => s.PurchaseSkuId == purchaseSchemeProductSku.PurchaseSkuId))
                                {
                                    productSkuWithScheme.PurchaseSchemeProductSkuList.Add(purchaseSchemeProductSku);

                                    purchaseSchemeProductSku.ItemTotal = productSkuWithScheme.Quantity;
                                    purchaseSchemeProductSku.OnItemTotalChanged = OnItemTotalChanged;
                                }
                            }
                        });
                    }
                }
                #endregion
            }
            catch
            {

            }
            finally
            {
                ewh.Set();
            }
        }

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

        private void DeleteProductSkuWithScheme(ProductSkuWithScheme productSkuWithScheme)
        {
            ProductSkuWithSchemeList.Remove(productSkuWithScheme);
            this.delayTrigger.SetKey(Guid.NewGuid().ToString());
        }

        private void EditQuantityRatio(object param)
        {
            var paramList = (object[])param;
            var skuQuantity = Convert.ToInt32(paramList[0]);
            var purchaseSchemeProductSku = paramList[1] as PurchaseSchemeProductSku;

            var editWindow = new EditQuantityRatioWindow(purchaseSchemeProductSku.QuantityRatio);
            if (editWindow.ShowDialog() == true)
            {
                var quantityRatio = editWindow.QuantityRatio;
                purchaseSchemeProductSku.QuantityRatio = quantityRatio;
                purchaseSchemeProductSku.ItemTotal = quantityRatio * skuQuantity;
            }
        }

        private void AddQuantity(PurchaseSchemeProductSku purchaseSchemeProductSku)
        {
            purchaseSchemeProductSku.ItemTotal++;
        }

        private void SubtractQuantity(PurchaseSchemeProductSku purchaseSchemeProductSku)
        {
            if (purchaseSchemeProductSku.ItemTotal > 1)
                purchaseSchemeProductSku.ItemTotal--;
        }
    }
}