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>
/// 計算勞退金
/// </summary>
public class Blra : LaborAndHealthFee
{
  private int _annuitySalary;
  private double _companyFee;
  private double _personalFee;
  private int _inworkdays;

  public Blra(DateTime aDate)
    : base(aDate)
  {
    _bftyp = 3;
    _tableName = "BLRA";
  }

  public LaborRetireAnnuity GetFee()
  {
    LaborRetireAnnuity fee = new LaborRetireAnnuity();
    fee.Init();
    fee.CompanyFee = Convert.ToInt32(Math.Round(_companyFee, MidpointRounding.AwayFromZero));
    fee.PersonalFee = Convert.ToInt32(Math.Round(_personalFee, MidpointRounding.AwayFromZero));
    fee.AnnuitySalary = _annuitySalary;
    return fee;
  }

  public void Clear()
  {
    _annuitySalary = 0;
    _companyFee = 0;
    _personalFee = 0;
    _inworkdays = 0;
  }

  /// <summary>
  /// 計算勞退提撥，並加入 Blra 的執行個體中
  /// </summary>
  /// <param name="salary">月薪</param>
  /// <param name="startDay">本月在職起始日</param>
  /// <param name="endDay">本月在職結束日</param>
  /// <param name="personalRate">個人提繳率</param>
  /// <param name="employeeType">員工類別 1=雇主 2=員工</param>
  /// <param name="thisMonthDays">本月到職天數</param>
  /// <param name="nation">員工國籍 1=本國籍 2=外國籍</param>
  public void Add(int salary, DateTime startDay, DateTime endDay, int personalRate, string employeeType, int thisMonthDays, string nation)
  {
    // 外國籍員工沒有勞退提撥
    if (nation == "2")
      return;    
    
    double bsamt = GetAmont(salary);
    double daysRatio = 0;
    int days = 0;
    int monthEndDay = WGuard1.GetMonthEnd(startDay, 0).Day;
    _annuitySalary = Convert.ToInt32(bsamt);

    if (bsamt > 0)
    {
      // 月初日到月底日
      if (startDay.Day == 1 && endDay.Day == monthEndDay)
      {
        days = 30;
      }
      else
      {
        // 結束日是月底日
        if (endDay.Day == monthEndDay)
        {
          if (startDay.Day == 30 || startDay.Day == 31)
            days = 1;
          else
            days = 30 - startDay.Day + 1;
        }
        else
        // 結束日非月底日
        {
          days = endDay.Day - startDay.Day + 1;
        }
        if (days > 30)
          days = 30;
      }

      /*
      // 月初日到月底日，以 30 天計算
      if (startDay.Day == 1 && endDay.Day == monthEndDay)
      {
        days = 30;
      }
      else
      {
        // 結束日是月底日，用 30 去減
        //if (endDay.Day == monthEndDay)
        //  days = 30 - startDay.Day + 1;
        // 結束日非月底日，用實際結束日去減
        //else
        days = endDay.Day - startDay.Day + 1;
        // 調整天數，最多 30 天
        if (days > 30)
          days = 30;
      }
      */

      // 若本月累計天數 > 30 則減去多出的天數
      if (_inworkdays + days > 30)
        days = 30 - _inworkdays;
      _inworkdays += days;

      daysRatio = Convert.ToDouble(days) / 30d;

      // 計算公司提撥
      if (employeeType == "1")      // 員工身份是雇主
        _companyFee += 0;
      else
        _companyFee += Math.Round(bsamt * 0.06 * daysRatio, 4, MidpointRounding.AwayFromZero);

      // 計算個人提撥
      _personalFee += Math.Round(bsamt * ((double)personalRate / 100) * daysRatio, 4, MidpointRounding.AwayFromZero);
    }
  }
}

public struct LaborRetireAnnuity
{
  public int CompanyFee;
  public int PersonalFee;
  public int AnnuitySalary;

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

  public void Add(LaborRetireAnnuity fee)
  {
    AnnuitySalary = fee.AnnuitySalary;
    CompanyFee += fee.CompanyFee;
    PersonalFee += fee.PersonalFee;
  }
}