using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Configuration;
using System.Diagnostics;

namespace HXX.Scanner.Biz
{
    /// <summary>
    /// 扫描统计相关
    /// </summary>
    public class biz_scanHistory
    {
        //private static Stopwatch sw = new Stopwatch();
        /// <summary>
        /// 总扫描张数
        /// </summary>
        private static int total_sum = 0;
        /// <summary>
        /// 总扫描计时
        /// </summary>
        private static double total_seconds = 0;
        /// <summary>
        /// 批次扫描计时
        /// </summary>
        private static double batch_seconds = 0;
        /// <summary>
        /// 上次扫描张数
        /// </summary>
        private static int latest_sum = 0;
        /// <summary>
        /// 上次扫描开始时间
        /// </summary>
        private static DateTime latest_start_time = DateTime.Now.Date;
        /// <summary>
        /// 上次扫描结束时间
        /// </summary>
        private static DateTime latest_end_time = DateTime.Now;
        /// <summary>
        /// 当前扫描状态
        /// </summary>
        private static bool on_scan = false;
        /// <summary>
        /// 同步块
        /// </summary>
        private static object lockObj = new object();

        /// <summary>
        /// 开始一次新统计
        /// </summary>
        public static void start_new()
        {
            lock (lockObj)
            {
                latest_start_time = DateTime.Now;
                latest_sum = 0;
                on_scan = true;
            }
        }

        /// <summary>
        /// 增加一次统计计算
        /// </summary>
        public static void add_history()
        {
            lock (lockObj)
            {
                total_sum++;
                latest_sum++;

                var temp_seconds = (DateTime.Now - latest_start_time).TotalSeconds;
                batch_seconds = total_seconds + temp_seconds;
            }
        }

        /// <summary>
        /// 结束统计
        /// </summary>
        public static void end_new()
        {
            lock (lockObj)
            {
                on_scan = false;
                latest_end_time = DateTime.Now;

                var latest_total_seconds = (latest_end_time - latest_start_time).TotalSeconds;
                total_seconds += latest_total_seconds;
            }
        }

        /// <summary>
        /// 获取统计记录
        /// </summary>
        /// <returns></returns>
        public static scan_history get_history()
        {
            var history = new scan_history();

            lock (lockObj)
            {
                double latest_total_seconds = 0;
                double latest_speed = 0;

                if (on_scan)
                {
                    latest_total_seconds = (DateTime.Now - latest_start_time).TotalSeconds;
                }
                else
                {
                    if (latest_start_time == DateTime.Now.Date)
                    {
                        latest_total_seconds = 0;
                        latest_speed = 0;
                    }
                    else
                    {
                        latest_total_seconds = (latest_end_time - latest_start_time).TotalSeconds;
                        latest_speed = latest_sum / latest_total_seconds;
                    }
                }
               

                history.total_sum = total_sum;
                history.last_start_time = latest_start_time;
                history.last_scan_elapse = SecondToHour(batch_seconds);
                history.last_speed = (int)latest_speed;

                if (history.last_speed == 0)
                {
                    history.last_speed = 1;
                }
            }

            return history;
        }

        /// <summary>
        /// 根据秒总数获取时间格式
        /// </summary>
        /// <param name="time"></param>
        /// <returns></returns>
        private static string SecondToHour(double time)
        {
            string str = "";
            int hour = 0;
            int minute = 0;
            int second = 0;
            second = Convert.ToInt32(time);

            if (second > 60)
            {
                minute = second / 60;
                second = second % 60;
            }

            if (minute > 60)
            {
                hour = minute / 60;
                minute = minute % 60;
            }

            if (hour == 0)
            {
                str =minute + "分钟" + second + "秒";
            }
            else
            {
                str = hour + "小时" + minute + "分钟" + second + "秒";
            }

            return str;
        }
    }
}