import java.io.*;

public class Pet implements java.io.Serializable {

	// serializable version number
	private static final long serialVersionUID = 1;

	// the pet's stats
	private int hunger;
	private int thirst;
	private int energy;
	private boolean life;
	
	// everything starts off good
	public Pet(){
		hunger = 0;
		thirst = 0;
		energy = 100;
		life = true;
	}
	
	// reset the pet's hunger
	public void feed(){
		hunger = 0;
		thirst += 5;
		energy -= 5;
		if(hunger > 100 || thirst > 100 || energy < 0){
			this.kill();
		}
	}
	
	// reset the pet's thirst
	public void water(){
		hunger += 5;
		thirst = 0;
		energy -= 5;
		if(hunger > 100 || thirst > 100 || energy < 0){
			this.kill();
		}
	}
	
	// reset the pet's energy
	public void rest(){
		hunger += 5;
		thirst += 5;
		energy = 100;
		if(hunger > 100 || thirst > 100 || energy < 0){
			this.kill();
		}
	}
	
	// kill the pet
	public void kill(){
		hunger = 0;
		thirst = 0;
		energy = 0;
		life = false;
	}
	
	// do nothing
	public void neglect(){
		hunger += 5;
		thirst += 5;
		energy -= 5;
		if(hunger > 100 || thirst > 100 || energy < 0){
			this.kill();
		}
	}
	
	// print the pet's stats
	public void printStatus(){
		if(life){
			System.out.println("\tHunger: " + hunger);
			System.out.println("\tThirst: " + thirst);
			System.out.println("\tEnergy: " + energy);
		} else{
			System.out.println("This pet died.");
		}
	}

	// helper methods
	public int getHunger(){
		return hunger;
	}
	public int getThirst(){
		return thirst;
	}
	public int getEnergy(){
		return energy;
	}
	public boolean isAlive(){
		return life;
	}
	
	// save the current pet to the disk
	public void saveToDisk(){
		try{
			FileOutputStream fos = new FileOutputStream("pet.pet");
			ObjectOutputStream oos = new ObjectOutputStream(fos);
			oos.writeObject(this);
			oos.close();
			fos.close();
		}catch(IOException ioe){
			ioe.printStackTrace();
		}
	}
	
	// read a pet from the disk
	public static Pet loadFromDisk(){
		Pet pet = null;
		try{
			FileInputStream fin = new FileInputStream("pet.pet");
			ObjectInputStream oin = new ObjectInputStream(fin);
			pet = (Pet) oin.readObject();
			oin.close();
			fin.close();
		}catch(IOException ioe){
			// ioe.printStackTrace();
		}catch(ClassNotFoundException cnfe){
			cnfe.printStackTrace();
		}
		return pet;
	}
}