/* 
 * A program to perform some basic operations on a list of String names. 
 */

package arraylists;

import java.util.ArrayList;
import java.util.List;

public class ArrayListProcessing {

    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("Eugen, Prinz");
        names.add("Hipper, Admiral");
        names.add("HMS, Amazon");

        // POINT B: Create an ArrayList of just the first names of the names
        //          ArrayList. Use a for loop to print out the names, separated by spaces.
        List<String> firstNamesList = firstNames(names);

        System.out.print("First names: ");
        for (String firstName : firstNamesList) {
            System.out.print(firstName + " ");
        }
        System.out.println();

        // POINT C: Use String's join function to create and print a String of just the first names
        //          of the names ArrayList with each name separated by comma.
        String firstNames = String.join(", " , firstNamesList);

        System.out.println("First names: " + firstNames);

        // POINT D: By analogy from points B and C, print a comma-separated list of the last names in the
        //          names ArrayList.
        List<String> lastNamesList = lastNames(names);

        String lastNames = String.join(", " , lastNamesList);

        System.out.println("Last names: " + lastNames);

        // POINT E: Print a comma-separated list of all uppercase first names from the list of names in the names ArrayList.
        List<String> upperCaseFirstNamesList = upperCaseNames(firstNames(names));
        String upperCaseFirstNames = String.join(", ", upperCaseFirstNamesList);

        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.
        List<String> hyphenatedLastNamesList = hyphenatedNames(lastNames(names));
        String hyphenatedLastNames = String.join(", ", hyphenatedLastNamesList);

        System.out.println("Hyphenated last names: " + hyphenatedLastNames);

        // POINT G: Print the integer value of the total length of all names in the names ArrayList.
        int totalLength = totalNameLength(names);

        System.out.println("Total length: " + totalLength);

        // POINT H: Print the integer value of the total length of all first names in the names ArrayList.
        int totalFirstLength = totalNameLength(firstNamesList);

        System.out.println("Total first name length: " + totalFirstLength);

        // POINT I: Print the integer value of the product of the length of all first names in the names ArrayList.
        int productLength = productNameLength(names);

        System.out.println("Product name length: " + productLength);

    }

    public static int productNameLength(List<String> names){
        int productLength = 1;
        for (String name : names){
            productLength = productLength * name.length();
        }
        return productLength;
    }
    public static int totalNameLength(List<String> names){
        int totalLength = 0;
        for (String name : names){
            totalLength = totalLength + name.length();
        }
        return totalLength;
    }

    public static List<String> hyphenatedNames(List<String> names){
        List<String> hyphenated = new ArrayList<>();
        for (String name : names){
            if (name.contains("-")){
                hyphenated.add(name);
            }
        }
        return hyphenated;
    }

    public static List<String> upperCaseNames(List<String> names){
        List<String> uppercases = new ArrayList<>();
        for(String name : names){
            uppercases.add(name.toUpperCase());
        }
        return uppercases;
    }

    public static List<String> firstNames(List<String> names){
        List<String> firsts = new ArrayList<>();
        for (String name : names) {
            firsts.add(firstName(name));
        }
        return firsts;
    }

    public static List<String> lastNames(List<String> names){
        List<String> lasts = new ArrayList<>();
        for (String name : names) {
            lasts.add(lastName(name));
        }
        return lasts;
    }

    private static String firstName(String directoryStyleName) {
        int firstNamePosition = directoryStyleName.indexOf(",");
        String firstName = directoryStyleName.substring(firstNamePosition + 2, directoryStyleName.length());
        return firstName;
    }

    private static String lastName(String directoryStyleName) {
        int lastNamePosition = directoryStyleName.indexOf(",");
        String lastName = directoryStyleName.substring(0, lastNamePosition);
        return lastName;
    }
}