using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Nancy;
using Nancy.Json;
using POSV.Common.Transport;
using POSV.Common.Util;
using POSV.Entity;
using POSV.Service.Utils;

namespace POSV.Service.Module
{
    public class SaleClearModule : NancyModule
    {
        private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();

        public SaleClearModule():base("/api/v1")
        {

            StaticConfiguration.DisableErrorTraces = true;

            //请求沽清列表数据，用于POS系统启动后初始化
            Post["/sale/clear"] = r =>
            {
                return AvailableSaleClear();
            };

            Post["/sale/clear/list"] = r =>
            {
                //解析JSON请求参数
                var body = Context.Request.Body;
                int length = (int)body.Length;
                byte[] array = new byte[length];
                body.Read(array , 0 , length);

                var json = System.Text.Encoding.UTF8.GetString(array);
                var obj = JSON.Deserialize<Dictionary<string , string>>(json);

                var dateTimer = obj["date"];

                return GetSaleClearList(dateTimer);
            };


            Post["/sale/clear/change"] = r => {

                //解析JSON请求参数
                var body = Context.Request.Body;
                int length = (int)body.Length;
                byte[] array = new byte[length];
                body.Read(array , 0 , length);

                var json = System.Text.Encoding.UTF8.GetString(array);
                
                return ChangeSaleClear(json);
            };
        }

        private Response ChangeSaleClear(string json)
        {
            var transport = new TransportResponse<SaleClear>();
            transport.Status = 0;
            transport.Message = "执行失败";
            transport.Data = null;

            try
            {
                //收到收银端请求变更对象
                var saleClear = JSON.Deserialize<SaleClear>(json);

                //变更服务中心缓存数据
                SaleClearUtils.Instance.Maps[saleClear.ProductId] = saleClear;

                transport.Status = 1;
                transport.Message = "执行成功";
                transport.Data = saleClear;
            }
            catch (Exception ex)
            {
                logger.Error(ex , "获取沽清数据异常");
            }

            //logger.Info(JSON.Serialize(transport));

            return Response.AsJson(transport);
        }

        private Response GetSaleClearList(string dateTimer = null)
        {

            var transport = new TransportResponse<List<SaleClear>>();
            transport.Status = 0;
            transport.Message = "执行失败";
            transport.Data = new List<SaleClear>();

            try
            {
                var result = SaleClearUtils.Instance.GetSaleClearList(dateTimer);
                
                if (result.Item1)
                {
                    transport.Status = 1;
                    transport.Message = "执行成功";

                    transport.Data = result.Item3;
                }
            }
            catch (Exception ex)
            {
                logger.Error(ex , "获取沽清数据异常");
            }

            //logger.Info(JSON.Serialize(transport));

            return Response.AsJson(transport);
        }

        /// <summary>
        /// 获取当日及未来的可用沽清
        /// </summary>
        /// <param name="r"></param>
        /// <returns></returns>
        private Response AvailableSaleClear()
        {
            var result = new TransportResponse<List<SaleClear>>();
            result.Status = 0;
            result.Message = "执行异常";
            result.Data = new List<SaleClear>();

            try
            {
                result.Status = 1;
                result.Message = "执行成功";
                result.Data = SaleClearUtils.Instance.Maps.Values.ToList();  
            }
            catch (Exception ex)
            {
                logger.Error(ex , "获取沽清数据异常");
            }

            //logger.Info(JSON.Serialize(result));

            return Response.AsJson(result);
        }
    }
}