package arraylistplay;

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

public class StreamArrayListProcessing {
    public static void main(String[] args){
        //Point A: Add some strings which represent names to an ArrayList.
        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("Vanderwall, Grace");
        names.add("Mercer, Matthew");

        //Point B: use man and the toList Collector to create an ArrayList of just the first names of the names ArrayList.Use a for loop to print out names, separated by spaces
        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:Use map and the Joining collector to create a String of just the first names of the names ArrayList with each name separated by a comma. Print it.
        String firstNames = names.stream()
                .map(n -> firstName(n))
                .collect(Collectors.joining(", "));
        System.out.println("First names: " + firstNames);
        System.out.println("First names: " + firstNames);
        //Point D: By analogy from point C, print a comma   -separated list of the last names in the names ArrayList.
        String lastNames = names.stream()
                .map(n -> lastName(n))
                .collect(Collectors.joining(","));

        System.out.println("LastNames: " + lastNames);
        //Point E: Print a comma-separated list of all uppercase first names from the list of names in the names ArrayList
      String upperCaseFirstNames = names.stream()
                .map(n -> firstName(n))
                .map(n -> n.toUpperCase())
                .collect(Collectors.joining(", "));
      System.out.println("Uppercase first names: " + upperCaseFirstNames);
        //Point F: Print a comma-separated list of all hyphenated last names from the list of names in the names ArrayList.
        String hyphenateedLastNames = names.stream()
                .map(n -> lastName(n))
                .filter(n -> n.contains("-"))
                .collect(Collectors.joining(", "));
        System.out.println("Hypenated Last Names: " + hyphenateedLastNames);
        //Point G: Print the integer value of the total length of all first names in the names ArrayList
        int totalLength = names.stream()
                .map(n -> n.length())
                .reduce(0, (n1, n2) -> n1 +n2);
        System.out.println("Total length: " + totalLength);
        //Point H: Print the integer value of the product of the length of all first names in the names ArrayList.
        int totalLengthFirstNames = firstNamesList.stream()
                .map(n -> n.length())
                .reduce(0,(n1, n2) -> n1+n2);
        System.out.println("Total Length of the First Names: " + totalLengthFirstNames);
        //Point I: Print the integer value of the product of the length of all first names in the names ArrayList.
        int totalProductNames = names.stream()
                .map(n -> n.length())
                .reduce(0,(n1, n2) -> n1 * n2);
        System.out.println("Total Length of the First Names: " + totalProductNames);
    }
    private static String firstName(String directoryStyleName) {
        int i = directoryStyleName.indexOf(",");
        return directoryStyleName.substring(i + 2);
    }
    private static String lastName(String directoryStyleName) {
        int i = directoryStyleName.indexOf(",");
        return directoryStyleName.substring(0, i);
    }
}