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");

        //Point B: Make an array list of the first names
        List<String> firstNamesList=names.stream()
                .map(n->firstName(n))
                .collect(Collectors.toList());

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

        //Point C: Do the same as Point B but separate each name with a comma and don't use a for loop to print the names
        String firstNames=names.stream()
                .map(n->firstName(n))
                .collect(Collectors.joining(", "));
        System.out.println("First Names: "+firstNames);

        //Point D: Make an array list of the last names like in Point B with the lastName method and make a comma separated list of the names
        List<String> lastNamesList=names.stream()
                .map(n->lastName(n))
                .collect(Collectors.toList());
        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 the uppercased first names from the list of names
        String firstNamesUpperCaseList=names.stream()
                .map(n->firstName(n))
                .map(n->n.toUpperCase())
                .collect(Collectors.joining(", "));
        System.out.println("Uppercase first names: "+firstNamesUpperCaseList);

        //Point F: Print a comma separated list of all the hyphenated last names
        String hyphenatedLastNamesList=names.stream()
                .map(n->lastName(n))
                .filter(n->n.contains("-"))
                .collect(Collectors.joining(", "));
        System.out.println("Hypenated last names: "+ hyphenatedLastNamesList);

        //Point G: print the integer value of the total length of the names list
        int totalLength=names.stream()
                .map(n->n.length())
                .reduce(0,(n1,n2)->n1+n2);

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

        //Point H: print the integer value of the total length of the first names list
        totalLength=firstNamesList.stream()
                .map(n->n.length())
                .reduce(0,(n1,n2)->n1+n2);

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

        //Point I: print an integer value of the product of the names lengths in the first names list
        int product=firstNamesList.stream()
                .map(n->n.length())
                .reduce(1,(n1, n2)->n1*n2);
        System.out.println("Total first names list product: "+ product);




    }

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

    private static String firstName(String n) {
        int commaPosition = n.indexOf(",");
        String firstName = n.substring(commaPosition + 2, n.length());
        return firstName;

    }

}