/**
 * 狀態(tài)抽象類
 */
public abstract class State {
	// 扣除積分 - 50
    public abstract void deductMoney();
    // 是否抽中獎(jiǎng)品
    public abstract boolean raffle();
    // 發(fā)放獎(jiǎng)品
    public abstract  void dispensePrize();
}

public class CanRaffleState extends State {
    RaffleActivity activity;
    public CanRaffleState(RaffleActivity activity) {
        this.activity = activity;
    }
    //已經(jīng)扣除了積分，不能再扣
    @Override
    public void deductMoney() {
        System.out.println("已經(jīng)扣取過了積分");
    }
    //可以抽獎(jiǎng), 抽完獎(jiǎng)后，根據(jù)實(shí)際情況，改成新的狀態(tài)
    @Override
    public boolean raffle() {
        System.out.println("正在抽獎(jiǎng)，請(qǐng)稍等！");
        Random r = new Random();
        int num = r.nextInt(10);
        // 10%中獎(jiǎng)機(jī)會(huì)
        if(num == 0){
            // 改變活動(dòng)狀態(tài)為發(fā)放獎(jiǎng)品 context
            activity.setState(activity.getDispenseState());
            return true;
        }else{
            System.out.println("很遺憾沒有抽中獎(jiǎng)品！");
            // 改變狀態(tài)為不能抽獎(jiǎng)
            activity.setState(activity.getNoRafflleState());
            return false;
        }
    }
    // 不能發(fā)放獎(jiǎng)品
    @Override
    public void dispensePrize() {
        System.out.println("沒中獎(jiǎng)，不能發(fā)放獎(jiǎng)品");
    }
}

/**
 * 獎(jiǎng)品發(fā)放完畢狀態(tài)
 * 說明，當(dāng)我們activity 改變成 DispenseOutState， 抽獎(jiǎng)活動(dòng)結(jié)束
 */
public class DispenseOutState extends State {
	// 初始化時(shí)傳入活動(dòng)引用
    RaffleActivity activity;

    public DispenseOutState(RaffleActivity activity) {
        this.activity = activity;
    }
    @Override
    public void deductMoney() {
        System.out.println("獎(jiǎng)品發(fā)送完了，請(qǐng)下次再參加");
    }
    @Override
    public boolean raffle() {
        System.out.println("獎(jiǎng)品發(fā)送完了，請(qǐng)下次再參加");
        return false;
    }
    @Override
    public void dispensePrize() {
        System.out.println("獎(jiǎng)品發(fā)送完了，請(qǐng)下次再參加");
    }
}

public class DispenseState extends State {
	 // 初始化時(shí)傳入活動(dòng)引用，發(fā)放獎(jiǎng)品后改變其狀態(tài)
    RaffleActivity activity;
    public DispenseState(RaffleActivity activity) {
        this.activity = activity;
    }
    @Override
    public void deductMoney() {
        System.out.println("不能扣除積分");
    }
    @Override
    public boolean raffle() {
        System.out.println("不能抽獎(jiǎng)");
        return false;
    }
    //發(fā)放獎(jiǎng)品
    @Override
    public void dispensePrize() {
        if(activity.getCount() > 0){
            System.out.println("恭喜中獎(jiǎng)了");
            // 改變狀態(tài)為不能抽獎(jiǎng)
            activity.setState(activity.getNoRafflleState());
        }else{
            System.out.println("很遺憾，獎(jiǎng)品發(fā)送完了");
            // 改變狀態(tài)為獎(jiǎng)品發(fā)送完畢, 后面我們就不可以抽獎(jiǎng)
            activity.setState(activity.getDispensOutState());
            //System.out.println("抽獎(jiǎng)活動(dòng)結(jié)束");
            //System.exit(0);
        }
    }
}

public class NoRaffleState extends State {
	 // 初始化時(shí)傳入活動(dòng)引用，扣除積分后改變其狀態(tài)
    RaffleActivity activity;
    public NoRaffleState(RaffleActivity activity) {
        this.activity = activity;
    }
    // 當(dāng)前狀態(tài)可以扣積分 , 扣除后，將狀態(tài)設(shè)置成可以抽獎(jiǎng)狀態(tài)
    @Override
    public void deductMoney() {
        System.out.println("扣除50積分成功，您可以抽獎(jiǎng)了");
        activity.setState(activity.getCanRaffleState());
    }
    // 當(dāng)前狀態(tài)不能抽獎(jiǎng)
    @Override
    public boolean raffle() {
        System.out.println("扣了積分才能抽獎(jiǎng)喔！");
        return false;
    }
    // 當(dāng)前狀態(tài)不能發(fā)獎(jiǎng)品
    @Override
    public void dispensePrize() {
        System.out.println("不能發(fā)放獎(jiǎng)品");
    }
}

public class RaffleActivity {
	// state 表示活動(dòng)當(dāng)前的狀態(tài)，是變化
    State state = null;
    // 獎(jiǎng)品數(shù)量
    int count = 0;
    // 四個(gè)屬性，表示四種狀態(tài)
    State noRafflleState = new NoRaffleState(this);
    State canRaffleState = new CanRaffleState(this);
    State dispenseState =   new DispenseState(this);
    State dispensOutState = new DispenseOutState(this);
    //構(gòu)造器
    //1. 初始化當(dāng)前的狀態(tài)為 noRafflleState（即不能抽獎(jiǎng)的狀態(tài)）
    //2. 初始化獎(jiǎng)品的數(shù)量 
    public RaffleActivity( int count) {
        this.state = getNoRafflleState();
        this.count = count;
    }
    //扣分, 調(diào)用當(dāng)前狀態(tài)的 deductMoney
    public void debuctMoney(){
        state.deductMoney();
    }
    //抽獎(jiǎng) 
    public void raffle(){
    	// 如果當(dāng)前的狀態(tài)是抽獎(jiǎng)成功
        if(state.raffle()){
        	//領(lǐng)取獎(jiǎng)品
            state.dispensePrize();
        }
    }
    public State getState() {
        return state;
    }
    public void setState(State state) {
        this.state = state;
    }
    //這里請(qǐng)大家注意，每領(lǐng)取一次獎(jiǎng)品，count--
    public int getCount() {
    	int curCount = count; 
    	count--;
        return curCount;
    }
    public void setCount(int count) {
        this.count = count;
    }
    public State getNoRafflleState() {
        return noRafflleState;
    }
    public void setNoRafflleState(State noRafflleState) {
        this.noRafflleState = noRafflleState;
    }
    public State getCanRaffleState() {
        return canRaffleState;
    }
    public void setCanRaffleState(State canRaffleState) {
        this.canRaffleState = canRaffleState;
    }
    public State getDispenseState() {
        return dispenseState;
    }
    public void setDispenseState(State dispenseState) {
        this.dispenseState = dispenseState;
    }
    public State getDispensOutState() {
        return dispensOutState;
    }
    public void setDispensOutState(State dispensOutState) {
        this.dispensOutState = dispensOutState;
    }
}

public class ClientTest {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// 創(chuàng)建活動(dòng)對(duì)象，獎(jiǎng)品有1個(gè)獎(jiǎng)品
        RaffleActivity activity = new RaffleActivity(1);
        // 我們連續(xù)抽300次獎(jiǎng)
        for (int i = 0; i < 30; i++) {
            System.out.println("--------第" + (i + 1) + "次抽獎(jiǎng)----------");
            // 參加抽獎(jiǎng)，第一步點(diǎn)擊扣除積分
            activity.debuctMoney();
            // 第二步抽獎(jiǎng)
            activity.raffle();
        }
	}
}