using BBWY.Client.Models;
using BBWY.Common.Models;
using GalaSoft.MvvmLight.Command;
using Microsoft.Win32;
using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Input;

namespace BBWY.Client.ViewModels
{
    public class BillCorrectionViewModel : BaseVM, IDenpendency
    {
        public GlobalContext GlobalContext { get; set; }

        public DateTime StartDate { get; set; }

        public DateTime EndDate { get; set; }

        /// <summary>
        /// 销售运费快递账单文件列表
        /// </summary>
        public ObservableCollection<string> SaleFreightBillFileList { get; set; }

        /// <summary>
        /// 销售运费账单列表
        /// </summary>
        public List<BillModel> SaleFreightBillList { get; set; }

        /// <summary>
        /// 导入快递账单
        /// </summary>
        public ICommand ImportSaleFreightBillCommand { get; set; }

        public BillCorrectionViewModel()
        {
            SaleFreightBillFileList = new ObservableCollection<string>();
            SaleFreightBillList = new List<BillModel>();
            StartDate = DateTime.Now.Date.AddDays((DateTime.Now.Day - 1) * -1).AddMonths(-1);
            EndDate = StartDate.AddMonths(1).AddDays(-1);

            ImportSaleFreightBillCommand = new RelayCommand<string>(ImportSaleFreightBill);
        }

        private void ImportSaleFreightBill(string expressName)
        {
            var ofd = new OpenFileDialog() { Filter = "excel文件|*.xlsx;*.xls" };
            if (ofd.ShowDialog() != true)
                return;
            var fileName = ofd.FileName.Substring(ofd.FileName.LastIndexOf("\\") + 1);
            var filePath = ofd.FileName;
            if (SaleFreightBillFileList.Contains(fileName))
            {
                MessageBox.Show("请勿重复导入快递账单", "导入快递账单");
                return;
            }
            IWorkbook xbook = null;
            try
            {
                using (var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
                {
                    if (filePath.EndsWith(".xls"))
                        xbook = new HSSFWorkbook(fs);
                    else if (filePath.EndsWith(".xlsx"))
                        xbook = new XSSFWorkbook(fs);
                }
                using (xbook)
                {
                    IList<BillModel> billModelList = null;
                    if (expressName == "YT")
                    {
                        billModelList = LoadYTSaleBillFile(xbook);
                    }
                    else if (expressName == "YZ")
                    {
                        billModelList = LoadYZSaleBillFile(xbook);
                    }
                    else if (expressName == "JD")
                    {
                        billModelList = LoadJDSaleBillFile(xbook);
                    }
                    if (billModelList != null && billModelList.Count() > 0)
                    {
                        SaleFreightBillList.AddRange(billModelList);
                        SaleFreightBillFileList.Add(fileName);
                    }


                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "导入账单失败提示");
                return;
            }
        }

        private IList<BillModel> LoadYTSaleBillFile(IWorkbook xbook)
        {
            return null;
        }

        /// <summary>
        /// 读取邮政运费账单
        /// <para>验证邮件号和总邮资</para>
        /// </summary>
        /// <param name="xbook"></param>
        /// <returns></returns>
        private IList<BillModel> LoadYZSaleBillFile(IWorkbook xbook)
        {
            var sheet = xbook.GetSheetAt(0);
            var waybillNoCellTitle = sheet.GetRow(0).GetCell(2);
            if (waybillNoCellTitle == null || waybillNoCellTitle.StringCellValue != "邮件号")
                throw new Exception("验证邮政快递账单失败-未读取到邮件号");
            var saleExpressFreight = sheet.GetRow(0).GetCell(8);
            if (saleExpressFreight == null || saleExpressFreight.StringCellValue != "总邮资")
                throw new Exception("验证邮政快递账单失败-未读取到总邮资");

            var rowCount = sheet.LastRowNum;
            for (var i = 1; i < rowCount; i++)
            { 
                
            }
            return null;
        }

        private IList<BillModel> LoadJDSaleBillFile(IWorkbook xbook)
        {
            return null;
        }
    }
}