//Robin Geijer roge8388

//32. 32? 33.

import java.util.Scanner;
import java.util.ArrayList;

public class DogProgram {

	private String name;
	private String breed;
	private int age;
	private int weight;

	private ArrayList<Dog> dogList = new ArrayList<Dog>();


	private Scanner input = new Scanner(System.in);


	public void initialize() {
	System.out.println("Welcome! Enter one of the following commands:");
	System.out.println("- Register new dog");
	System.out.println("- Increase age");
	System.out.println("- List dogs");
	System.out.println("- Remove dog");
	System.out.println("- Exit");
	}

	public void runCommandLoop(){
		boolean ended;
		do {
			String command = readCommand();
			ended = handleCommand(command);
		} while(!ended);

	}

	public String readCommand(){
		System.out.print("Command: ");
		String command = input.nextLine();
		return command;
	}

	public boolean handleInput(String userInput){
		boolean isFilled = false;
		if(!userInput.isEmpty()){
			isFilled = true;
		}

		return isFilled;
	}

	public void registerNewDog() {
		System.out.println("You've entered the command \"Register new dog.\"");
		String userInput = ""; //Kommer lagra det användaren matar in

		//Alla de här 4 är exakt lika, bara att det är olika egenskaper de frågar efter, därför kommenterar jag bara den översta
		System.out.println("Name: ");
		userInput = input.nextLine(); //Ber användaren knappa in name/breed/age/weight och lagrar i en STRING
		while(!handleInput(userInput.trim())){ //Så länge som handleInput returnerar false
			System.out.println("Error: the name can’t be empty");
			System.out.println("Name:"); //Fråga efter namn/bla/bla
			userInput = input.nextLine(); //Skriv in
		} //Om den lämnar while-loopen så betyder det att handleInput = true
		name = userInput; //Lagra det användaren skrev i name eller vad det nu är

		System.out.println("Breed: ");
		userInput = input.nextLine();
		while(!handleInput(userInput.trim())){
			System.out.println("Error: the breed can’t be empty");
			System.out.println("Breed:");
			userInput = input.nextLine();
		}
		breed = userInput;

		System.out.println("Age: ");
		userInput = input.nextLine();
		while(!handleInput(userInput.trim()) ){
			System.out.println("Error: the age can’t be empty and has to be numbers");
			System.out.println("Age:");
			userInput = input.nextLine();
		}
		age = Integer.parseInt(userInput); //Konverterar om String till int då det användaren matar in lagras som string och age/weight är int

		System.out.println("Weight: ");
		userInput = input.nextLine();
		while(!handleInput(userInput.trim())){
			System.out.println("Error: the weight can’t be empty and has to be numbers");
			System.out.println("Weight:");
			userInput = input.nextLine();
		}
		weight = Integer.parseInt(userInput);

		Dog newDog = new Dog(name, breed, age, weight);
		dogList.add(newDog);

	}


	private boolean handleCommand(String command){
		switch (command.toUpperCase()) {
			case "EXIT":
				return true;
			case "REGISTER NEW DOG":
				registerNewDog();
				break;
			case "INCREASE AGE":
				changeAge();
				break;
			case "LIST DOGS":
				listAllDogs();
				break;
			case "REMOVE DOG":
				removeDog();
				break;
			default:
				System.out.println("Error: No such command.");
			}
				return false;
	}

	public void changeAge() {
		System.out.println("You've entered the command \"Increase age.\"");
		System.out.println("Enter the name of the dog that has aged.");
		name = input.nextLine().trim();

		int nameMatches = 0;

		for (Dog dog : dogList) {
			if (name.equalsIgnoreCase(dog.getName())) {

				dog.increaseAge(1);
				nameMatches++;
				System.out.println("The dog's age has been updated.");
			}
		}

		if (nameMatches == 0) {
			System.out.println("Error: Dog not found in register.");
		}

	}

	public void listAllDogs() {
		System.out.println("You've entered the command \"List dogs.\"");
		System.out.println("Enter the minimum tail length to search for.");
		double minLength = input.nextDouble();
		input.nextLine();

		if (minLength == 0) {

			for (Dog dog : dogList) {

				dog.getTailLength();
				System.out.println(dog);

			}
		}
		else {

			for (Dog dog : dogList) {

				if (dog.getTailLength() >= minLength) {
					System.out.println(dog);

				}
			}

		}

	}

	public void removeDog() {
		System.out.println("You gave the command \"remove dog\"");
		System.out.println("Please enter name: ");
		name = input.nextLine().trim();

		int matchingDogs = 0;
		for (Dog dog : dogList) {
			if(name.equalsIgnoreCase(dog.getName())) {
				dog.toString();
				dogList.remove(dog);
				System.out.println(name+ " has been removed from register");
				matchingDogs++;
				break;
			}
		}

		if (matchingDogs==0) {
			System.out.println("Error: dog with given name could not be found");

			}
	}

	public void exitProgram(){
		System.out.println("Bye");
	}

	private void run(){
		initialize();
		runCommandLoop();
		exitProgram();
	}

	public static void main(String[] args){
		new DogProgram().run();
	}
}