package arraylistplay;

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

public class StreamArrayListProcessing {
    public static void main(String[] args) {

        List<String> names = new ArrayList<>();
        names.add("Holiday, Billie");
        names.add("Claudel, Camllie");
        names.add("Picasso, Pablo");
        names.add("Gallen-Kallela, Akseli");
        names.add("Zotto, Osvaldo");
        names.add("Zhu, Wenhuan");
        names.add("Edward, Sheldon");

        // POINT B: Use map and the toList collector to 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> firstNameList = names.stream().map(n -> firstName(n)).collect(Collectors.toList());
        System.out.print("First names: ");
        for (String firstName : firstNameList) {
            System.out.print(firstName + " ");
        }
        System.out.println();


        // POINT C: Use map and the joining collector to created 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);


        // POINT D: By analogy from point C, print a comma-separated list of the last names in
        // the names ArrayList.

        List<String> lastNameList = names.stream().map(n -> lastName(n)).collect(Collectors.toList());
        System.out.print("Last names: ");
        for (String lastName : lastNameList) {
            System.out.print(lastName + " ");
        }
        System.out.println();
        String lastNames = names.stream().map(n -> lastName(n)).collect(Collectors.joining(", "));
        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.
        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 hyphenatedLastNames = names.stream().map(n -> lastName(n)).filter(n -> n.contains("-")).collect(Collectors.joining(", "));
        System.out.println("HyphenatedLastNames: " + hyphenatedLastNames);


        // POINT G: Print the integer value of the total length of all 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 total length of all first names in the
        // names ArrayList.
        int firstNameTotalLength = firstNameList.stream().map(n -> n.length()).reduce(0, (n1, n2) -> n1 + n2);
        System.out.println("Total first names length: " + firstNameTotalLength);


        // POINT I: Print the integer value of the product of the length of all first names
        // in the names ArrayList.
        int namesProductLength = firstNameList.stream().map(n -> n.length()).reduce(1, (n1, n2) -> n1 * n2);
        System.out.println("Total product of names length: " + namesProductLength);
    }

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

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

}