package com.egloos.realmove.dp.strategy;

import com.egloos.realmove.dp.strategy.framework.Hand;
import com.egloos.realmove.dp.strategy.framework.HandGameStrategy;

/**
 * ´ÙÀ½ ³»¹Ð ¼ÕÀ» Random ÇÏ°Ô °áÁ¤ÇÏÁö¸¸, °ú°ÅÀÇ ½Â·üÀ» ¹Ý¿µÇÏ¿© ³­¼ö¸¦ °è»êÇÑ´Ù.<br/>
 * ¿¹ÄÁ´ë, ÁÖ¸ÔÀÌ À̱ä Ƚ¼ö°¡ ¸¹´Ù¸é ´ÙÀ½¿¡µµ ÁÖ¸ÔÀ» ³¾ È®·üÀÌ Á»´õ ³ô´Ù.
 * 
 */
public class ProbStrategy implements HandGameStrategy {

	private Hand prevHand = null;
	private int[] winCount = new int[3];
	
	public ProbStrategy() {
		winCount[0] = 1;
		winCount[1] = 1;
		winCount[2] = 1;
	}
	
	public Hand getRandom() {
		int i = (int) ( Math.random() * ( winCount[0] + winCount[1] + winCount[2] ) );
		
		if ( i < winCount[0] ) {
			return Hand.SCISSOR;
		} else if ( i < winCount[0] + winCount[1] ) {
			return Hand.ROCK;
		} else {
			return Hand.PAPER;
		}
	}
	
	@Override
	public Hand next() {
		this.prevHand = getRandom();
		return this.prevHand;
	}

	@Override
	public void study( int result ) {
		winCount[ this.prevHand.getValue() ]++;
	}

}