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

namespace UAS_LabelMachine.PublicMethod
{
    class Analysis
    {
        /// <summary>
        /// Brand对应品牌，item对应DateCode，LotNo等，Data对应具体解析的数据
        /// </summary>
        /// <param name="Brand"></param>
        /// <param name="item"></param>
        /// <param name="Data"></param>
        /// <returns></returns>
        //Brand对应品牌，item对应DateCode，LotNo等，Data对应具体解析的数据
        public static string AnalysisData(string Brand, string item, string Data)
        {
            string ReturnData = "";
            switch (Brand)
            {
                //采集怡海能达村田的LotNo的解析规则
                case "MURATA":
                    if (item.ToUpper() == "LOTNO" || item.ToUpper() == "DATECODE")
                    {
                        string Year = Data.Substring(2, 1);
                        string Month = Data.Substring(3, 1);
                        string Day = Data.Substring(4, 2);
                        //处理年份
                        //当前年份的前三位
                        string CurrentYear_3 = DateTime.Now.Year.ToString().Substring(0, 3);
                        //采集到的年份
                        int CollectYear = int.Parse(CurrentYear_3 + Year);
                        //当前的年份 
                        int CurrentYear = int.Parse(DateTime.Now.Year.ToString());
                        //如果采集到的年份大于当前年份,将十年数-1
                        if (CollectYear > CurrentYear)
                        {
                            Year = int.Parse(CurrentYear_3) - 1 + Year;
                        }
                        else
                        {
                            Year = CollectYear.ToString();
                        }
                        //处理月份
                        switch (Month)
                        {
                            case "O":
                                Month = "10";
                                break;
                            case "N":
                                Month = "11";
                                break;
                            case "D":
                                Month = "12";
                                break;
                            default:
                                Month = "0" + Month;
                                break;
                        }
                        ReturnData = Year + Month + Day;
                    }
                    break;
                case "KEC":
                    if (item.ToUpper() == "LOTNO" || item.ToUpper() == "DATECODE")
                    {
                        string Year = Data.Substring(0, 1);
                        string Week = Data.Substring(1, 2);
                        DateTime DateBegin = DateTime.Now;
                        GetDaysOfWeeks(int.Parse("201" + Year), int.Parse(Week), out DateBegin);
                        ReturnData = DateBegin.ToString("yyyyMMdd");
                    }
                    break;
                default:
                    break;
            }
            return ReturnData;
        }

        public static bool GetDaysOfWeeks(int year, int index, out DateTime first)
        {
            first = DateTime.MinValue;
            if (year < 1700 || year > 9999)
            {
                //"年份超限"
                return false;
            }
            if (index < 1 || index > 53)
            {
                //"周数错误"
                return false;
            }
            DateTime startDay = new DateTime(year, 1, 1);  //该年第一天
            DateTime endDay = new DateTime(year + 1, 1, 1).AddMilliseconds(-1);
            int dayOfWeek = 0;
            if (Convert.ToInt32(startDay.DayOfWeek.ToString("d")) > 0)
                dayOfWeek = Convert.ToInt32(startDay.DayOfWeek.ToString("d"));  //该年第一天为星期几
            if (dayOfWeek == 7) { dayOfWeek = 0; }
            if (index == 1)
            {
                first = startDay;
            }
            else
            {
                first = startDay.AddDays((7 - dayOfWeek) + (index - 1) * 7); //index周的起始日期
            }
            if (first > endDay)  //startDayOfWeeks不在该年范围内
            {
                //"输入周数大于本年最大周数";
                return false;
            }
            return true;
        }
    }
}