/* 
 * A program to perform some basic operations on a list of strings 
 */
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 : 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("Ahir, Vishal");
        names.add("Singh, Sooraj");
        names.add("Patel, Preet");
        List<String> firstNamesList = names.stream()
                .map(n -> firstName(n))
                .collect(Collectors.toList());
        System.out.println("first names: ");
        for (String firstName : firstNamesList) {
            System.out.println(firstName + " ");
        }
        System.out.println();
        String firstNames = String.join(" ,", firstNamesList);
        System.out.println("firstNames: " + firstNames);
        List<String> lastNamesList = names.stream()
                .map(n -> lastName(n))
                .collect(Collectors.toList());
        System.out.println("last names: ");
        for (String lastName : lastNamesList) {
            System.out.println(lastName + " ");
        }
        System.out.println();
        String lastNames = String.join(" ,", lastNamesList);
        System.out.println("lastNames: " + lastNames);
        String upperCaseFirstNames = names.stream()
                .map(n -> firstName(n))
                .map(n -> n.toUpperCase())
                .collect(Collectors.joining(","));
        System.out.println("Uppercase first names: " + upperCaseFirstNames);
        String hyphenatedLastNames = names.stream()
                .map(n -> lastName(n))
                .filter(n -> n.contains("-"))
                .collect(Collectors.joining());
        System.out.println("Hyphenated Last names: " + hyphenatedLastNames);
        int totalLength = names.stream()
                .map(n -> n.length())
                .reduce(0, (n1, n2) -> n1 + n2);
        System.out.println("Total length: " + totalLength);
        int totalfirstlength = firstNamesList.stream()
                .map(n -> n.length())
                .reduce(0, (n1, n2) -> n1 + n2);
        System.out.println(" Totalfirst length: " + totalfirstlength);
        int totalProduct = names.stream()
                .map(n -> n.length())
                .reduce(1, (n1, n2) -> n1 * n2);
        System.out.println(" Total Product: " + totalProduct);
    }
    private static String firstName(String directoryStyleName) {
        int commaposition = directoryStyleName.indexOf(",");
        return directoryStyleName.substring(commaposition + 1);
    }
    private static List<String> firstNames(List<String> names) {
        List<String> firsts = new ArrayList<>();
        for (String name : names) {
            firsts.add(firstName(name));
        }
        return firsts;
    }
    private static String lastName(String directoryStyleName) {
        int commaposition = directoryStyleName.indexOf(",");
        return directoryStyleName.substring(0, commaposition);
    }
    private static List<String> lastNames(List<String> names) {
        List<String> firsts = new ArrayList<>();
        for (String name : names) {
            firsts.add(lastName(name));
        }
        return firsts;
    }
    public static List<String> upperCaseNames(List<String> names) {
        List<String> uppercase = new ArrayList<>();
        for (String name : names) {
            uppercase.add(name.toUpperCase());
        }
        return uppercase;
    }
    public static List<String> hyphenatedNames(List<String> names) {
        List<String> hyphenateds = new ArrayList<>();
        for (String name : names) {
            if (name.contains("-")) {
                hyphenateds.add(name);
            }
        }
        return hyphenateds;
    }
    public static int totalNameLength(List<String> names) {
        int totalLength = 0;
        for (String name : names) {
            totalLength = totalLength + name.length();
        }
        return totalLength;
    }
    public static int totalNameProduct(List<String> names) {
        int totalProduct = 1;
        for (String name : names) {
            totalProduct = totalProduct * name.length();
        }
        return totalProduct;
    }
}