package com.lun.c04;

import java.util.*;
import java.util.stream.*;

import static java.util.Comparator.comparing;
import static java.util.stream.Collectors.toList;

public class StreamBasic {

	public static void main(String... args) {
		// Java 7
		getLowCaloricDishesNamesInJava7(Dish.menu).forEach(System.out::println);

		System.out.println("---");

		// Java 8
		getLowCaloricDishesNamesInJava8(Dish.menu).forEach(System.out::println);

	}

	public static List<String> getLowCaloricDishesNamesInJava7(List<Dish> dishes) {
		List<Dish> lowCaloricDishes = new ArrayList<>();
		for (Dish d : dishes) {
			if (d.getCalories() < 400) {
				lowCaloricDishes.add(d);
			}
		}
		List<String> lowCaloricDishesName = new ArrayList<>();
		Collections.sort(lowCaloricDishes, new Comparator<Dish>() {
			public int compare(Dish d1, Dish d2) {
				return Integer.compare(d1.getCalories(), d2.getCalories());
			}
		});
		for (Dish d : lowCaloricDishes) {
			lowCaloricDishesName.add(d.getName());
		}
		return lowCaloricDishesName;
	}

	public static List<String> getLowCaloricDishesNamesInJava8(List<Dish> dishes) {
		return dishes.stream()
				.filter(d -> d.getCalories() < 400)
				.sorted(comparing(Dish::getCalories))
				.map(Dish::getName).collect(toList());
	}
}