import java.util.HashSet;
import java.util.List;
import java.util.Scanner;
import java.util.Set;

public class UserInterface {

    private Scanner reader;
    private PersonMaintenance pm;
    private String name;
    private String result;
    private String output;
    private List<String> phoneNumbers;
    private String message = "  phone number not found";

    public UserInterface(Scanner input) {
        reader = input;
        pm = new PersonMaintenance();
    }

    public void start() {
        printMenuOptions();
        enterMenuOption();
    }

    private void printMenuOptions() {
        System.out.println("phone search");
        System.out.println("available operations:");
        System.out.println(" 1 add a number");
        System.out.println(" 2 search for a number");
        System.out.println(" 3 search for a person by phone number");
        System.out.println(" 4 add an address");
        System.out.println(" 5 search for personal information");
        System.out.println(" 6 delete personal information");
        System.out.println(" 7 filtered listing");
        System.out.println(" x quit");

    }

    private void enterMenuOption() {
        while (true) {
            System.out.print("command: ");
            String commandNumber = reader.next();

            if (commandNumber.contentEquals("x")) {
                break;
            }
            runSearch(commandNumber);
        }
    }

    private void runSearch(String commandNumber) {
        int commandReceived = Integer.valueOf(commandNumber);
        String number = null;

        switch (commandReceived) {
            case 1:
                System.out.print("whose number: ");
                name = reader.next();
                System.out.print("number: ");
                number = reader.next();
                pm.addPhone(name, number);
                break;
            case 2:
                System.out.print("whose number: ");
                name = reader.next();
                phoneNumbers = pm.searchPhoneNumberByName(name);
                message = "  not found";
                printPhoneNumbers(phoneNumbers, message);
                break;
            case 3:
                System.out.print("number: ");
                number = reader.next();

                result = pm.searchForPersonByNumber(number);
                output = result == null ? message : result;
                System.out.println(output);
                break;
            case 4:
                System.out.print("whose address: ");
                name = reader.next();
                System.out.print("street: ");
                String street = reader.next();
                System.out.print("city: ");
                String city = reader.next();

                pm.addAddress(name, street, city);
                break;
            case 5:
                System.out.print("whose information: ");
                name = reader.next();

                result = pm.searchForAddress(name);
                phoneNumbers = pm.searchPhoneNumberByName(name);

                if ((result == null) && (phoneNumbers == null)) {
                    System.out.println("  not found");
                    return;
                }

                output = result == null ? "  address unknown" : result;
                System.out.println(output);

                printPhoneNumbers(phoneNumbers, message);
                break;
            case 6:
                System.out.print("whose information: ");
                name = reader.next();
                pm.removeInformation(name);
                break;

            case 7:
                System.out.print("whose information: ");
                System.out.print("keyword (if empty, all listed): ");
                String keyword = reader.next();

                Set<Address> addressResponse = new HashSet<Address>();
                addressResponse = pm.getAllAddresses();

                printFilteredListing(addressResponse, keyword);

            default:
                break;
        }
    }

    private void printFilteredListing(Set<Address> addressResponse, String keyword) {
        message = "phone number not found";
        name = keyword;
        for (Address a : addressResponse) {
            if ((keyword == null) || (keyword.isEmpty())) { // No Keyword Given
                name = a.getName();
                result = "  address: " + a.getStreet() + " " + a.getCity();
            } else if ((a.getStreet().contains(keyword)) || (a.getCity().contains(keyword))) {
                name = a.getName();
                result = "  address: " + a.getStreet() + " " + a.getCity();
            } else if (a.getName().contains(keyword)) {
                name = a.getName();
                result = "  address: " + a.getStreet() + " " + a.getCity();
            }

            phoneNumbers = pm.searchPhoneNumberByName(name);

            if ((result == null) && (phoneNumbers == null)) {
                output = " keyword not found";
            } else {
                output = result == null ? " " + name + "\n  address unknown" : " " + name + "\n" + result;
            }
            System.out.println(output);
            printPhoneNumbers(phoneNumbers, message);
        }

    }

    private void printPhoneNumbers(List<String> phoneNumbers, String message) {
        if (phoneNumbers == null) {
            System.out.println(message);
        } else {
            for(String s: phoneNumbers) {
                System.out.println("   " + s);
            };
        }
    }

}