using System;
using System.Data;
using System.Configuration;
using System.Data.Common;
using System.Collections;
using System.Collections.Generic;
using Wellan.Data;
using Wellan.Common;
using System.Linq;

/// <summary>
/// 節假日設定檔
/// </summary>
public class BhrdDAC : Wellan.Data.WDAC
{
    private Hashtable bhrdData = new Hashtable();
    private string nationalHolidays = "0101,0228,0501,1010";

    public const string 排休 = "排休";
    public const string 例假日 = "例假日";
    public const string 休假日 = "休假日";
    public const string 國定假日 = "國定假日";
    public static readonly List<string> 休假日班表 = new List<string> { 排休, 例假日, 休假日, 國定假日 };

    public BhrdDAC()
    {
    }

    public BhrdDAC(string connectionConfig, string connectionConfigName)
      : this()
    {
        this._connectionConfig = connectionConfig;
        this._connectionConfigName = connectionConfigName;
    }

    public BhrdDAC(WQuery query)
    {
        this._query = query;
    }

    public DataTable GetAll()
    {
        return Query.Select("SELECT BHYER, BHHRD FROM BHRD ORDER BY BHYER");
    }

    public string[] GetYear(int Year)
    {
        DbCommand cmd = Query.NewCommand("SELECT BHYER, BHHRD FROM BHRD WHERE BHYER=@BHYER");
        cmd.Parameters.Add(Query.NewParameter("BHYER", Year));
        DataTable bhrd = Query.Select(cmd);
        string yearData;

        // 有資料，取出該年資料
        if (bhrd.Rows.Count != 0)
        {
            yearData = bhrd.Rows[0]["BHHRD"].ToString();
        }
        // 無資料，回傳預設資料
        else
        {
            char[] tmp = new char[366];
            for (int i = 0; i < tmp.Length; i++)
            {
                tmp[i] = ' ';
            }

            DateTime aDate = new DateTime(Year, 1, 1);
            for (int i = 0; i < tmp.Length; i++)
            {
                if (aDate.DayOfWeek == DayOfWeek.Sunday || aDate.DayOfWeek == DayOfWeek.Saturday)
                    tmp[i] = (char)HolidayType.Holiday;
                else if (nationalHolidays.Contains(String.Format("{0:00}{1:00}", aDate.Month, aDate.Day)))
                    tmp[i] = (char)HolidayType.NationalHoliday;
                else
                    tmp[i] = (char)HolidayType.WorkDay;

                aDate = aDate.AddDays(1);
                if (aDate.Year != Year)
                    break;
            }

            yearData = new String(tmp);
        }

        string[] result = new string[12];
        for (int m = 1; m <= 12; m++)
        {
            DateTime aDate = new DateTime(Year, m, 1);
            result[m - 1] = yearData.Substring(aDate.DayOfYear - 1, WGuard1.GetMonthEnd(aDate, 0).Day);
        }

        return result;
    }

    private void SetYear(int Year, string[] YearData)
    {
        DbCommand cmd = Query.NewCommand("SELECT COUNT(1) FROM BHRD WHERE BHYER=@BHYER");
        cmd.Parameters.Add(Query.NewParameter("BHYER", Year));
        int count;
        ExecuteScalar(cmd, out count);
        if (count == 0)
        {
            cmd.CommandText = "INSERT INTO BHRD (BHYER, BHHRD, TRDAT, TRMOD, TRUSR) VALUES (@BHYER, @BHHRD, GETDATE(), 'INSERT', 'X001')";
        }
        else
        {
            cmd.CommandText = "UPDATE BHRD SET BHHRD=@BHHRD, TRDAT=GETDATE(), TRMOD='MODIFY', TRUSR='X001' WHERE BHYER=@BHYER";
        }
        cmd.Parameters.Add(Query.NewParameter("BHHRD", String.Concat(YearData)));
        Query.ExecuteNonQuery(cmd);
    }

    public string GetMonth(int Year, int Month)
    {
        string[] YearData = GetYear(Year);
        return YearData[Month - 1];
    }

    public void SetMonth(int Year, int Month, string Value)
    {
        string[] YearData = GetYear(Year);
        YearData[Month - 1] = Value;
        SetYear(Year, YearData);
    }

    public HolidayType GetDayHolidayType(DateTime aDateTime)
    {
        string bhhrd = "";
        if (!bhrdData.Contains(aDateTime.Year))
        {
            DbCommand cmd = Query.NewCommand("SELECT BHHRD FROM BHRD WHERE BHYER=@BHYER");
            cmd.Parameters.Add(Query.NewParameter("BHYER", aDateTime.Year));
            if (ExecuteScalar(cmd, out bhhrd))
                bhrdData.Add(aDateTime.Year, bhhrd);
        }
        else
        {
            bhhrd = bhrdData[aDateTime.Year].ToString();
        }

        if (bhhrd != "")
        {
            // 有節假日資料，找出該日之節假日資料
            char theDay;
            try
            {
                theDay = bhhrd[aDateTime.DayOfYear - 1];
            }
            catch
            {
                theDay = ' ';
            }

            switch ((HolidayType)theDay)
            {
                case HolidayType.WorkDay:              // 上班日
                case HolidayType.CompensatoryWorkDay:  // 補班
                case HolidayType.NationalHoliday:      // 國定假日或民俗假
                case HolidayType.Holiday:              // 例假日
                case HolidayType.ElasticRest:          // 彈性休假
                case HolidayType.TyphoonRest:          // 颱風假
                case HolidayType.VoteRest:             // 選舉假
                case HolidayType.CompanyActivity:      // 公司活動
                    return (HolidayType)theDay;
                default:
                    if (nationalHolidays.Contains(aDateTime.ToString("MMdd")))
                        return HolidayType.NationalHoliday;
                    else if (aDateTime.DayOfWeek == DayOfWeek.Sunday || aDateTime.DayOfWeek == DayOfWeek.Saturday)
                        return HolidayType.Holiday;
                    else
                        return HolidayType.WorkDay;
            }
        }
        else
        {
            // 若無節假日資料，則週六、週日為假日
            if (nationalHolidays.Contains(aDateTime.ToString("MMdd")))
                return HolidayType.NationalHoliday;
            else if (aDateTime.DayOfWeek == DayOfWeek.Sunday || aDateTime.DayOfWeek == DayOfWeek.Saturday)
                return HolidayType.Holiday;
            else
                return HolidayType.WorkDay;
        }
    }

    public bool IsHoliday(string bpeno, DateTime aDateTime)
    {
        // 先看班表有沒有資料
        RtmeDAC rtmeDao = new RtmeDAC();
        var rtme = rtmeDao.SelectDay(bpeno, aDateTime).FirstOrDefault();
        if (rtme != null && !string.IsNullOrEmpty(rtme.RTTID.Trim()))
        {
            return ItemIsHoliday(rtme.RTTID.Trim());
        }

        // 若沒有班表資料，用行事曆資料判斷是否需要上班
        HolidayType theDay = GetDayHolidayType(aDateTime);

        switch (theDay)
        {
            case HolidayType.WorkDay:              // 上班日
            case HolidayType.CompensatoryWorkDay:  // 補班
                return false;
            case HolidayType.NationalHoliday:      // 國定假日或民俗假
            case HolidayType.Holiday:              // 例假日
            case HolidayType.ElasticRest:          // 彈性休假
            case HolidayType.TyphoonRest:          // 颱風假
            case HolidayType.VoteRest:             // 選舉假
            case HolidayType.CompanyActivity:      // 公司活動
                return true;
            default:
                return false;
        }
    }

    public static bool ItemIsHoliday(string item) 
    {
        return 休假日班表.IndexOf(item.Trim()) >= 0;
    }
}

public enum HolidayType
{
    /// <summary>
    /// 無資料
    /// </summary>
    Null = ' ',
    /// <summary>
    /// 上班日
    /// </summary>
    WorkDay = '-',
    /// <summary>
    /// 補班
    /// </summary>
    CompensatoryWorkDay = 'B',
    /// <summary>
    /// 國定假日或民俗假
    /// </summary>
    NationalHoliday = 'N',
    /// <summary>
    /// 例假日
    /// </summary>
    Holiday = 'H',
    /// <summary>
    /// 彈性休假
    /// </summary>
    ElasticRest = 'V',
    /// <summary>
    /// 颱風假
    /// </summary>
    TyphoonRest = 'T',
    /// <summary>
    /// 選舉假
    /// </summary>
    VoteRest = 'E',
    /// <summary>
    /// 公司活動
    /// </summary>
    CompanyActivity = 'A'
}