import java.util.Arrays;
import java.util.Scanner;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.BufferedReader;
import java.io.FileReader;

public class BoardingSys {

    //declaring scanner to take input
    static Scanner kb = new Scanner(System.in);

    public static void main(String[] args) throws Exception {



        //declaring the cabins array
        Cabin[] cabins = new Cabin[12];
        for(int i=0;i<cabins.length;i++) {
            cabins[i] = new Cabin();
        }




        while(true) {
            System.out.println("Enter option: "
                    + "\nA - to add cabin crew, "
                    + "\nV - to view all cabins,"
                    + "\nE - print empty cabins,"
                    + "\nD - delete customer from cabin,"
                    + "\nF - find cabin using Customer name,"
                    + "\nS - store program data into file,"
                    + "\nL - load program data from the file,"
                    + "\nO - view passengers in alphabetical order");

            char option = kb.next().charAt(0); // reads String from keyboard and save it into option
            System.out.println("You selected option: " + option);
            kb.nextLine(); //fixes issues with nextLine()
            //code for option A

            switch (option) {
                case 'A':
                    cabins = addCustomer(cabins);
                    break;
                case 'V':
                    printCabins(cabins);
                    break;
                case 'E':
                    printEmptyCabins(cabins);
                    break;
//                case 'D':
//                    cabins = deleteCustomerFromCabin(cabins);
//                    break;
//                case 'F':
//                    findCabinWithCusName(cabins);
//                    break;
//                case 'S':
//                    storeDataInFile(cabins);
//                    break;
//                case 'L':
//                    cabins = loadProgramData();
//                    break;
//                case 'O':
//                    viewPassengerInOrder(cabins);
//                    break;
                default:
                    System.out.println("Invalid option");
                    break;
            }
        }
    }
    private static void viewPassengerInOrder(String[] cabins) {

        String[] cabinsSorted = new String[12];

        for(int i =0; i<cabins.length;i++) {
            if(!(cabins[i]== null)) {
                for(int j=i+1; j<cabins.length; j++) {
                    //compares each elements of the array to all the remaining elements
                    if(!(cabins[j]==null)) {
                        if(cabins[i].compareTo(cabins[j])>0) {

                            //swap elements with each other
                            String temp = cabins[i];
                            cabins[i] = cabins[j];
                            cabins[j] = temp;
                        }
                    }

                }
            }

        }

        System.out.println("Viewing all cabins: ");
        for(int i=0;i<cabins.length;i++) {
            if(!(cabins[i] == null)) {
                System.out.println(cabins[i]);
            }
        }


    }
    private static String[] loadProgramData() throws Exception {
        System.out.println("Loading data from CabinData.txt");
        BufferedReader reader = new BufferedReader(new FileReader("CabinData.txt"));
        String[] cabins = new String[12];
        for (int i=0; i<cabins.length;i++) {
            String cabinCus = reader.readLine();
            //if cabinCus is string null, transform it to NULL type
            if(cabinCus.equals("null")) {
                cabins[i] = null;
            }else {
                cabins[i] = cabinCus;
            }

        }
        reader.close();
        return cabins;
    }
    private static void storeDataInFile(String[] cabins) throws Exception {
        System.out.println("Saving data in CabinData.txt");
        BufferedWriter writer = new BufferedWriter(new FileWriter("CabinData.txt", false));
        for(int i=0;i<cabins.length;i++) {
            String message = cabins[i];
             writer.write(message);
             writer.newLine();
        }
        writer.flush();
        System.out.println("Data successfully saved");

    }
    private static void findCabinWithCusName(String[] cabins) {
        System.out.println("Enter customer name:");
        String cusName = kb.nextLine();
        boolean found = false;
        for(int i=0; i<cabins.length;i++) {
            //check to see if its not null first so we can use .equals to check the customer name
            //Cannot invoke "String.equals(Object)" because "cabins[i]" is null
            if(!(cabins[i] == null)) {
                if(cabins[i].equals(cusName)) {
                    System.out.println("Customer " + cusName + " is in cabin " + (i+1));
                    found = true;
                    break;
                }
            }
        }
        if(!found) {
            System.out.println("Customer " + cusName + " is not on the ship.");
        }


    }
    private static String[] deleteCustomerFromCabin(String[] cabins) {

        //delete customer by cabin index/id
        System.out.println("Please enter the index of the cabin you would like to empty: ");
        int cabinIndex = kb.nextInt() - 1;
        System.out.println("Customer "+ cabins[cabinIndex] +" has been removed from the cabin");
        cabins[cabinIndex] = null;
        return cabins;

    }
    private static void printEmptyCabins(Cabin[] cabins) {
        System.out.println("Viewing all empty cabins: ");
        for(int i=0;i<cabins.length;i++) {
            Passenger[] passengers = cabins[i].getPassengers();
            for(int j=0;j<passengers.length;j++) {
                if(passengers[j] != null) {
                    break;
                }
                if(j == passengers.length-1) {
                    System.out.println("Cabin number: " + (i+1) + " is empty.");
                }
                //magic numbers; works if there are few passengers as it doesn't require much code to write
////            if(passengers[0] == null && passengers[1] == null && passengers[2] == null) {
//               System.out.println("Cabin number: " + (i+1) + " is empty.");
            }
        }
    }
    private static void printCabins(Cabin[] cabins) {
        System.out.println("Viewing all cabins: ");
        for(int i=0;i<cabins.length;i++) {
            Passenger[] passengers = cabins[i].getPassengers();
            System.out.println("Passengers in cabin: " + (i+1));
            for(int j=0; j<passengers.length;j++) {
                if(!(passengers[j] == null)) {
                    System.out.print(passengers[j].toString());
                    System.out.println();
                }
            }
        }

    }
    //add customer method that takes the old cabins array and returns the new cabins array
    private static Cabin[] addCustomer(Cabin[] cabins) {

        boolean entered = false;

        for(int i=0;i<cabins.length;i++) {
            Passenger[] passengers = cabins[i].getPassengers();
            for(int j=0;j<passengers.length;j++) {
                if(passengers[j] == null) {
                    Passenger p = new Passenger();

                    //read from keyboard passenger details
                    System.out.println("Insert First Name: ");
                    p.setFirstName(kb.nextLine());
                    System.out.println("Insert Sur Name: ");
                    p.setSurName(kb.nextLine());
                    System.out.println("Inser Expenses: ");
                    //thorws error in case the value is not Double/Long
                    p.setExpenses(kb.nextDouble());

                    //add passenger to array of first cabin
                    passengers[j] = p;
                    entered = true;
                    System.out.println("Passenger "+ p.getFirstName() +" is added to the cabin: " + (i+1));
                    break;
                }
            }
            if(entered) {
                break;
            }
          }
        if(!entered) {
            System.out.println("No available places");
        }
        return cabins;
    }
}


public class Cabin {

    private Passenger[] passengers = new Passenger[3];

    public Cabin (Passenger[] passengers) {

        this.passengers = passengers;
    }

    public Cabin() {
//      this.passengers = null;

    }

    public Passenger[] getPassengers() {
        return passengers;
    }

    public void setPassengers(Passenger[] passengers) {
        this.passengers = passengers;
    }




}



public class Passenger {


    private String firstName, surName;
    private double expenses;

    public Passenger(String firstName, String surName, double expenses) {
        this.firstName = firstName;
        this.surName = surName;
        this.expenses = expenses;
    }

    public Passenger() {

    }

    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getSurName() {
        return surName;
    }
    public void setSurName(String surName) {
        this.surName = surName;
    }
    public double getExpenses() {
        return expenses;
    }
    public void setExpenses(double expenses) {
        this.expenses = expenses;
    }

    @Override
    public String toString() {
        return "Passenger " + firstName + " " + surName + ",  with expenses of: " + expenses;
    }




}