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;

/// <summary>
/// 計算健保費
/// </summary>
public class Bhif : LaborAndHealthFee
{
  private double _healthInsuranceFeeRate;
  private double _healthInsuranceAverageFamily;
  private double _oldHealthInsuranceFeeRate;

  public Bhif(DateTime aDate) : base(aDate)
  {
    _bftyp = 2;
    _tableName = "BHIF";
    _healthInsuranceFeeRate = 0.0455d;
    _oldHealthInsuranceFeeRate = 0.0455d;
  }

  /// <summary>
  /// 健保費率
  /// </summary>
  public double HealthInsuranceFeeRate
  {
    get
    {
      return _healthInsuranceFeeRate;
    }
    set
    {
      _healthInsuranceFeeRate = value;
    }
  }

  /// <summary>
  /// 健保平均眷口數
  /// </summary>
  public double HealthInsuranceAverageFamily
  {
    get
    {
      return _healthInsuranceAverageFamily;
    }
    set
    {
      _healthInsuranceAverageFamily = value;
    }
  }
 
  public HealthInsuranceFee GetFee(int salary, int family, int family25, int family50, string disabled, bool hasHIF, string employeeType)
  {
    // 找出投保薪資
    HealthInsuranceFee fee = new HealthInsuranceFee();
    fee.Init();
    
    // 不投健保，直接回傳
    if (!hasHIF)
      return fee;

    // 新費率投保薪資
    double bsamt = GetAmont(salary);
    // 舊費率投保薪資
    double oldbsamt = GetAmont(new DateTime(2010, 3, 1) ,salary);

    fee.InsuranceSalary = (Int32)bsamt;

    if (bsamt > 0)
    {
      // 計算公司保費
      // 員工身份是雇主
      if (employeeType == "1")   
        fee.CompanyFee = 0;
      // 員工身份是受雇員工
      else
        fee.CompanyFee = Convert.ToInt32(Math.Round(bsamt * _healthInsuranceFeeRate * 0.6d * (1d + _healthInsuranceAverageFamily), MidpointRounding.AwayFromZero));

      // 計算個人保費
      double personalFee = 0;
      double oldPersonalFee = 0;

      // 員工身份是雇主
      if (employeeType == "1")
      {
        personalFee = bsamt * _healthInsuranceFeeRate;
        oldPersonalFee = oldbsamt * _oldHealthInsuranceFeeRate;
      }
      // 員工身份是受雇員工
      else
      {
        personalFee = bsamt * _healthInsuranceFeeRate * 0.3d;
        oldPersonalFee = oldbsamt * _oldHealthInsuranceFeeRate * 0.3d;
      }

      /*
        99/4/1 到 101/12/31 實施差額補助
        投保金額等級        所得水準              補助比率
        40,100元(含)以下    約5萬1千元(含)以下    100%
        42,000元至50,600元  約5萬3千元至6萬5千元  20%
        53,000元(含)以上    約6萬8千元(含)以上    0%
      */
       
      if (_baseDate.ToString("yyyyMM", WGuard1.InvariantCulture).CompareTo("201004") >= 0 &&
          _baseDate.ToString("yyyyMM", WGuard1.InvariantCulture).CompareTo("201301") < 0)
      {
        // 以月投保薪資計算補助比率
        if (bsamt <= 40100)
        {
          personalFee = oldPersonalFee;
        }
        else if (bsamt > 40100 && bsamt < 53000)
        {
          personalFee = personalFee - Convert.ToInt32(Math.Round((personalFee - oldPersonalFee) * 0.2d, MidpointRounding.AwayFromZero));
        }
      }

      int noDiscountFee = Convert.ToInt32(Math.Round(personalFee, MidpointRounding.AwayFromZero));
      int discount25Fee = Convert.ToInt32(Math.Truncate(Math.Round(personalFee, MidpointRounding.AwayFromZero) * 0.75d));
      int discount50Fee = Convert.ToInt32(Math.Truncate(Math.Round(personalFee, MidpointRounding.AwayFromZero) * 0.5d));
      int remainFamily = 3;

      switch (disabled)
      {
        case "0":   // 無
          fee.PersonalFee = noDiscountFee;
          break;
        case "1":   // 輕度
          fee.PersonalFee = discount25Fee;
          break;
        case "2":   // 中度
          fee.PersonalFee = discount50Fee; 
          break;
        case "3":   // 重度
          fee.PersonalFee = 0;
          break;
      }
      
      // 加上一般眷口
      fee.PersonalFee += noDiscountFee * (family > remainFamily ? (remainFamily > 0 ? remainFamily : 0) : family);
      remainFamily -= family;
      
      // 加上減免25%眷口
      fee.PersonalFee += (discount25Fee) * (family25 > remainFamily ? (remainFamily > 0 ? remainFamily : 0) : family25);
      remainFamily -= family25;

      // 加上減免50%眷口
      fee.PersonalFee += (discount50Fee) * (family50 > remainFamily ? (remainFamily > 0 ? remainFamily : 0) : family50);
    }

    return fee;
  }
}

public struct HealthInsuranceFee
{
  public int InsuranceSalary;
  public int PersonalFee;
  public int CompanyFee;

  public void Init()
  {
    InsuranceSalary = 0;
    PersonalFee = 0;
    CompanyFee = 0;
  }

  public void Assign(HealthInsuranceFee fee)
  {
    InsuranceSalary = fee.InsuranceSalary;
    PersonalFee = fee.PersonalFee;
    CompanyFee = fee.CompanyFee;
  }
}