package class3_1_Polymorphism;

import java.text.DecimalFormat;
import java.util.ArrayList;

public abstract class Animal {
    private String name;
    private static ArrayList<String> names = new ArrayList<String>();
    protected DecimalFormat formatter = new DecimalFormat("#.#");

    /**
     * The distance forward from some point
     * in meters
     */
    private double location;

    /**
     * Create a new animal.
     * @param name display name of the animal
     */
    public Animal(String name) {
        names.add(name);

        if(name.length() >0) {
            this.name = name;
        }
        else {
            this.name = "UNDEFINED";
        }
    }


    /**
     * Say something
     */
    public abstract void speak();

    /**
     * Simulate animal running
     * @param dist distance to run forward (meters)
     */
    public void runForwardMeters(double dist) {
        location += dist;
    }

    public static void printAllNames() {
        for(String name: names) {
            System.out.println("Name: "+name);
        }
    }

    public boolean equals(Object o) {
        boolean result;
        if(o instanceof Animal) {
            Animal animal = (Animal) o;
            result = this.location == animal.location;
        } else {
            result = false;
        }
        return result;
    }

//    public boolean equals(Object o) {
//        Animal a = (Animal)o;
//        return this.name == a.name
//                && this.location == a.location;
//    }

    @Override
    public String toString() {
        return name+ "\t" + formatter.format(location)
                + " meters from start";
    }
}