using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.Common;
using Wellan.Data;
using Wellan.Common;
using System.Collections.Generic;

/// <summary>
/// 計算勞健保費基礎類別
/// </summary>
public class LaborAndHealthFee
{
  protected WQuery _query;
  protected DateTime _baseDate;
  protected Dictionary<DateTime, List<LHFClass>> _amtData;
  protected int _bftyp;
  protected string _tableName;

  /// <param name="aDate">計算日期</param>
  public LaborAndHealthFee(DateTime baseDate)
  {
    WConnectionString.ConnectionConfigFile = WConfig.GetConnectionConfig();
    WConnectionString.ConnectionConfigName = WConfig.GetConnectionConfigName();
    _query = new WQuery(WConnectionString.GetConnectionType(), WConnectionString.GetConnectionString());
    _baseDate = baseDate;
  }

  /// <summary>
  /// 取得特定日期的級距表
  /// </summary>
  /// <param name="aDate"></param> 
  protected void GetData(DateTime aDate)
  {
    if (_amtData == null)
      _amtData = new Dictionary<DateTime,List<LHFClass>>();

    if (!_amtData.ContainsKey(aDate))
    {
      List<LHFClass> _newAmtDataItem = new List<LHFClass>();

      // 取得適用級距表版本
      DataTable _verData = _query.Select(String.Format("SELECT * FROM BFDT WHERE BFTYP={0} ORDER BY BFVER", _bftyp));
      int version = 0;

      foreach (System.Data.DataRow row in _verData.Rows)
      {
        if (aDate.CompareTo(row["BFSDT"]) >= 0 && (row["BFEDT"] == DBNull.Value || aDate.CompareTo(row["BFEDT"]) <= 0))
        {
          version = Convert.ToInt32(row["BFVER"]);
          break;
        }
      }

      // 取得該版本的級距表
      DataTable data = _query.Select(String.Format("SELECT * FROM {1} WHERE BSVER={0} ORDER BY BSLVL", version, _tableName));

      for (int i = 0; i < data.Rows.Count; i++)
      {
        _newAmtDataItem.Add(new LHFClass(Convert.ToInt32(data.Rows[i]["BSLOW"]),
          Convert.ToInt32(data.Rows[i]["BSHIH"]),
          Convert.ToInt32(data.Rows[i]["BSAMT"])));
      }

      _amtData.Add(aDate, _newAmtDataItem);
    }
  }

  // 取得目前級距表
  protected void GetData()
  {
    GetData(_baseDate);
  }

  /// <summary>
  /// 以特定日期適用的級距表，取得特定日期適用的投保薪資
  /// </summary>
  /// <param name="aDate"></param>
  /// <param name="salary"></param>
  /// <returns></returns> 
  protected double GetAmont(DateTime aDate, int salary)
  {
    GetData(aDate);

    double bsamt = 0;
    for (int i = 0; i < _amtData[aDate].Count; i++)
    {
      if (salary >= _amtData[aDate][i].Low && salary <= _amtData[aDate][i].High)
      {
        bsamt = _amtData[aDate][i].Amt;
        break;
      }
    }

    return bsamt;
  }

  /// <summary>
  /// 以目前級距表，取得投保薪資
  /// </summary>
  /// <param name="salary"></param>
  /// <returns></returns>
  protected double GetAmont(int salary)
  {
    return GetAmont(_baseDate, salary);
  }

  protected struct LHFClass
  {
    public int Low;
    public int High;
    public int Amt;

    public LHFClass(int aLow, int aHigh, int aAmt)
    {
      Low = aLow;
      High = aHigh;
      Amt = aAmt;
    }
  }
}