package arraylists;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

public class StreamArrayListProcessing {
    public static void main(String[] args){
        //Point A
        List<String> names = new ArrayList<>();
        names.add("Holiday, Billie");
        names.add("Claudel, Camille");
        names.add("Picasso, Pablo");
        names.add("Gallen-Kallela, Akseli");
        names.add("Zotto, Osvaldo");
        names.add("Soules, Douglas");
        //Point B
        List<String> firstNamesList = names.stream()
                .map(n -> firstName(n))
                .collect(Collectors.toList());
        System.out.print("First names: ");
        for (String firstName : firstNamesList){
            System.out.print(firstName+" ");
        }
        System.out.println(" ");
        //Point C
        String firstNames = names.stream()
                .map(n -> firstName(n))
                .collect(Collectors.joining(", "));
        System.out.println("First names: " + firstNames);
        //Point D
        String lastNames = names.stream()
                .map(n -> lastName(n))
                .collect(Collectors.joining(", "));
        System.out.println("Last names: " + lastNames);
        //Point E
        String upperCaseFirstNames = names.stream()
                .map(n -> firstName(n))
                .map(n -> n.toUpperCase())
                .collect(Collectors.joining(", "));
        System.out.println("Uppercase first names: " + upperCaseFirstNames);
        //Point F
        String hyphenatedLastNames = names.stream()
                .map(n -> lastName(n))
                .filter(n -> n.contains("-"))
                .collect(Collectors.joining(", "));
        System.out.println("Uppercase first names: " + hyphenatedLastNames);
        //Point G
        int totalLength = names.stream()
                .map(n -> n.length())
                .reduce(0, (n1, n2) -> n1 + n2);
        System.out.println("Total length: " + totalLength);

        //Point H
        int totalFirstLength = firstNamesList.stream()
                .map(n -> n.length())
                .reduce(0, (n1, n2) -> n1 + n2);
        System.out.println("Total length: " + totalFirstLength);
        //Point I
        List<String> lastNamesList = names.stream()
                .map(n -> lastName(n))
                .collect(Collectors.toList());
        int totalLastLength = lastNamesList.stream()
                .map(n -> n.length())
                .reduce(0, (n1, n2) -> n1 + n2);
        System.out.println("Total length: " + totalLastLength);
    }
    private static String firstName(String directoryStyleName) {
        int Space = directoryStyleName.indexOf(" ");
        String firstName = directoryStyleName.substring(Space + 1);
        return firstName;
    }
    private static String lastName(String directoryStyleName) {
        int Comma = directoryStyleName.indexOf(",");
        String lastName = directoryStyleName.substring(0,Comma);
        return lastName;
    }
}