using POSV.Entity;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace POSV.Component
{
    public class MakeMerge
    {
        public static List<Tuple<ProductMakeType, ProductMakeDetail>> Merge(int rows, int cols, List<Tuple<ProductMakeType, ProductMakeDetail>> dataSource)
        {
            //移除可能存在的分页标识
            dataSource.RemoveAll(x => Constant.PREV_PAGER.Equals(x.Item2.Memo) || Constant.NEXT_PAGER.Equals(x.Item2.Memo));

            int pageSize = rows * cols;
            int totalCount = dataSource.Count;

            //启用分页
            int pageCount = ((totalCount - 1) + (pageSize - 2) - 1) / (pageSize - 2);

            int offset = 0;

            for (int i = 1; i < pageCount; i++)
            {
                offset += (pageSize - 1);

                ProductMakeDetail entity = new ProductMakeDetail();
                entity.Memo = Constant.NEXT_PAGER;
                entity.Ext3 = (i + 1).ToString();
                dataSource.Insert(offset, new Tuple<ProductMakeType, ProductMakeDetail>(null, entity));

                offset++;

                entity = new ProductMakeDetail();
                entity.Memo = Constant.PREV_PAGER;
                entity.Ext3 = i.ToString();

                dataSource.Insert(offset, new Tuple<ProductMakeType, ProductMakeDetail>(null, entity));
            }

            return dataSource;
        }
    }
}