using System;

namespace ClusterLibrary
{
	/// <summary>
	/// Summary description for Set.
	/// </summary>
	public class Set : System.Collections.ArrayList
	{
		// Point甸闌 葛滴 歷厘竅綽 府膠飄
		System.Collections.ArrayList	m_PointList;

		/// <summary>
		/// Set闌 歷厘竅綽 Class
		/// </summary>
		public Set()
		{
			//
			// TODO: Add constructor logic here
			//
			this.m_PointList	=	new System.Collections.ArrayList();
		}

		/// <summary>
		/// 傈眉 單撈磐狼 乞閉闌 備竊
		/// </summary>
		/// <returns></returns>
		public Point Center(){
			Cluster clTemp;
			Point	ptTemp = new Point();
			int number = 0;
			for ( int i = 0; i < this.Count ; i ++ ){
				clTemp = (Cluster)this[i];
				number += clTemp.Count;
				for ( int j = 0; j < clTemp.Count ; j ++ ){
					ptTemp = ptTemp + (Point)clTemp[j];
				}
			}

			return ptTemp / (double)number;
		}

		/// <summary>
		/// 傈眉 單撈磐狼 乞閉闌 備竊 for J#
		/// </summary>
		/// <returns></returns>
		public Point weight_center(){
			return this.Center();
		}

		/// <summary>
		/// Point甫 罐酒輯 Cluster甫 積己竅擱輯 Set狼 單撈磐甫 父電促.
		/// </summary>
		/// <param name="i"> 割鍋擄 Set牢瘤 唱鷗郴綽 Index </param>
		/// <param name="point"> 澇仿且 Point </param>
		public void AddPoint( int index, ClusterLibrary.Point point ){
			// 老竄 傈眉 Point List俊 歷厘茄促
			this.m_PointList.Add( point );

			ClusterLibrary.Cluster clTemp;
			for ( int i = 0; i < this.Count ; i ++ ){
				clTemp = (Cluster) this[i];
				// 貨肺 Add且 Point 瀝焊客 泅犁 父甸絹柳 Cluster甫 厚背茄促.
				if ( clTemp.index != index ) {
					// Point啊 啊福虐綽 Cluster Index客 促福擱 促弗 Cluster甫 厚背茄促.
					continue;
				}
				else{
					// Point啊 啊福虐綽 Cluster Index啊 撈固 糧犁茄促擱 弊 Cluster俊 Point甫 器竊矯挪促.
					clTemp.Add( point );
					return;
				}
			}
			// Point啊 啊福虐綽 Cluster Index啊 泅犁 糧犁竅綽 Cluster郴俊 絕闌 錠 貨肺款 Cluster甫 父電促.
			clTemp = new ClusterLibrary.Cluster( index );
			// 貨肺 父電 Cluster甫 Set俊 器竊矯挪促.
			this.Add( clTemp );
			// Point藹闌 貨肺 父電 Cluster俊 器竊茄促.
			clTemp.Add( point );
		}

		/// <summary>
		/// Set狼 農扁甫 Return 竅綽 竊薦 for J#
		/// Number of Points
		/// </summary>
		/// <returns></returns>
		public int size(){
			int count	=	0;
			foreach (Cluster cl in this) {
				count	+=	cl.Count;
			}
			return count;
		}

		/// <summary>
		/// Set俊 甸絹樂綽 Point甫 波晨
		/// </summary>
		/// <param name="index"></param>
		/// <returns></returns>
		public Cluster GetPoint( int index ){
			if ( index >= this.Count )
				throw new Exception ( "Index out of range." );
			return (ClusterLibrary.Cluster)this[index];
		}

		/// <summary>
		/// Set俊 甸絹樂綽 Point甫 波晨 for J#
		/// </summary>
		/// <param name="index"></param>
		/// <returns></returns>
		public Cluster getValueAt( int index ){
			return this.GetPoint( index );
		}

		public void	addElement( Cluster cl ){
			this.Add(cl);
		}

		public Cluster elementAt(int index ){
			return this.GetPoint(index);
		}
	}
}