using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using CY.Infrastructure.Common;
namespace CY.WebForm.Pages.sysInquiry
{
    /// <summary>
    /// CalculatePaperPriceHandler 的摘要说明
    /// </summary>
    public class CalculatePaperPriceHandler : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            string paperSize = string.Empty;
            int? gramWeight = null;
            decimal? tonsPrice = null;
            decimal? reamPrice = null;
            paperSize = context.Request.Params["paperSize"].ToString();
            if (!string.IsNullOrEmpty(context.Request.Params["gramWeight"].ToString()))
            {
                gramWeight = int.Parse(context.Request.Params["gramWeight"].ToString());
            }
            if (!string.IsNullOrEmpty(context.Request.Params["tonsPrice"].ToString()))
            {
                tonsPrice = Convert.ToDecimal(context.Request.Params["tonsPrice"].ToString());
            }
            if (!string.IsNullOrEmpty(context.Request.Params["reamPrice"].ToString()))
            {
                reamPrice = Convert.ToDecimal(context.Request.Params["reamPrice"].ToString());
            }
            context.Response.Write(CalculatePaperPrice(paperSize, gramWeight, tonsPrice, reamPrice));
            context.Response.End();
        }

        /// <summary>
        /// 纸价转换计算
        /// </summary>
        /// <param name="paperSize">纸张尺寸</param>
        /// <param name="gramgramWeight">克重</param>
        /// <param name="tonsPrice">吨价</param>
        /// <param name="reamPrice">令价</param>
        /// <returns>前台显示json字符串</returns>
        public string CalculatePaperPrice(string paperSize, int? gramWeight, decimal? tonsPrice, decimal? reamPrice)
        {
            //纸张单价
            decimal? price = 0;

            //令重
            decimal? reamWeight = 0;

            //令数
            double? reamNumber = 0;

            string html = "";

            if (gramWeight != null)
            {
                if (reamPrice == null)
                {

                    if (!string.IsNullOrEmpty(paperSize) && gramWeight != null && tonsPrice != null)
                    {
                        string[] paperSizes = paperSize.Split('×');

                        double widht = paperSizes[0].ToDouble2().Value / 1000;
                        double height = paperSizes[1].ToDouble2().Value / 1000;

                        double _gramWeight = gramWeight.ToDouble2().Value / 1000;

                        double area = widht * height;

                        price = (area * _gramWeight * (tonsPrice.ToDouble2() / 1000)).ToDecimal2();

                        reamWeight = (widht * height * _gramWeight * 500).ToDecimal2();

                        reamWeight = reamWeight.ToDecimal2();

                        reamNumber = (1000 / reamWeight).ToDouble2().Value.ToString("0.00").ToDouble2();

                        reamPrice = price * 500;

                    }
                }
                else
                {
                    if (!string.IsNullOrEmpty(paperSize) && gramWeight != null && reamPrice != null)
                    {
                        string[] paperSizes = paperSize.Split('×');

                        double widht = paperSizes[0].ToDouble2().Value / 1000;

                        double height = paperSizes[1].ToDouble2().Value / 1000;

                        double _gramWeight = gramWeight.ToDouble2().Value / 1000;

                        double area = (widht * height) / 2;

                        price = reamPrice / 500;

                        tonsPrice = (reamPrice.ToDouble2() / (area.ToDouble2() * (gramWeight.ToDouble2())) * 1000).ToDecimal2();

                        tonsPrice = tonsPrice.ToDecimal2();

                        reamWeight = (widht * height * _gramWeight * 500).ToDecimal2();

                        reamWeight = reamWeight.ToDecimal2();

                        reamNumber = (1000 / reamWeight).ToDouble2().Value.ToString("0.00").ToDouble2();
                    }
                }
            }
            else
            {
                string[] paperSizes = paperSize.Split('×');

                double widht = paperSizes[0].ToDouble2().Value / 1000;

                double height = paperSizes[1].ToDouble2().Value / 1000;

                double area = (widht * height) / 2;

                price = reamPrice / 500;

                gramWeight = ((reamPrice.ToDouble2() / (tonsPrice.ToDouble2() / 1000)) / area).ToInt32();

                double _gramWeight = gramWeight.ToDouble2().Value / 1000;

                reamWeight = (widht * height * _gramWeight * 500).ToDecimal2();

                reamWeight = reamWeight.ToDecimal2();

                reamNumber = (1000 / reamWeight).ToDouble2().Value.ToString("0.00").ToDouble2();
            }

            html = paperSize + "|" + gramWeight.ToDecimal2Yen() + "|" + reamWeight.ToDecimal2Yen() + "|" + reamNumber.ToDecimal2Yen() + "|" + tonsPrice.ToDecimal2Yen() + "|" + reamPrice.ToDecimal2Yen() + "|" + price.ToDecimal2Yen();
            return html;
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}