O3. Inventory / O5. Mid Exam Retake

package MidExam.O5;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;


public class O3Inventory {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        List<String> items = new ArrayList<>(Arrays.asList(scan.nextLine().split(", ")));

        String command = scan.nextLine();

        while (!command.equals("Craft!")) {

            String[] tokens = command.split(" - ");


            if (tokens[0].equals("Collect")) {
                if (items.contains(tokens[1])) {

                } else {
                    String collectItem = tokens[1];
                    items.add(collectItem);
                }
            } else if (tokens[0].equals("Drop")) {
                if (items.contains(tokens[1])) {
                    items.remove(tokens[1]);
                } else {

                }
            } else if (tokens[0].equals("Combine Items")) {
                String[] item = tokens[1].split(":");
                String oldItem = item[0];
                String newItem = item[1];

                for (int i = 0; i < items.size(); i++) {

                    String currentItem = items.get(i);

                    if (currentItem.equals(oldItem)) {
                        items.add(i + 1, newItem);
                        break;
                    }
                }
            } else if (tokens[0].equals("Renew")) {
                if (items.contains(tokens[1])) {
                    String renewItem = tokens[1];

                    items.remove(tokens[1]);
                    items.add(renewItem);
                }
            }

            command = scan.nextLine();
        }

        for (int i = 0; i <= items.size() - 1; i++) {

            if (i != items.size() - 1) {
                System.out.printf("%s, ", items.get(i));
            } else if (i == items.size() - 1) {
                System.out.printf("%s ", items.get(i));
            }
        }

    }
}