import java.io.*;
public class CarSales{
      private static Car car;
      private static boolean bStart;
   public static void main(String[] arg)throws Exception{
      InputStreamReader isr = new InputStreamReader(System.in);
      BufferedReader br = new BufferedReader(isr);
      String sUserInput = "";
      System.out.println("Welcome to the Car Store Application!");
      car = new Car();
      while(!sUserInput.trim().equals("0")){
         System.out.println("\n------------------\nPlease select an option below:");
         System.out.println("1.- Add a new car" );
         System.out.println("2.- Modify car VIN");
         System.out.println("3.- Modify carlicense plates");
         System.out.println("4.- Modify caryear");
         System.out.println("5.- Modify carMake");
         System.out.println("6.- Modify carModel");
         System.out.println("7.- Get Car Information");
         System.out.println("0.- Exit this program");
         sUserInput = br.readLine();
         if(sUserInput.trim().length() > 0){
            switch(sUserInput.charAt(0)){
               case '0':
                  System.out.println("Thank you for using this program");
                  break;
               case '1':
                  addCar();
                  break;
               case '2':
                  if(bStart)
                     carVIN();
                  else
                     System.out.println("You need to add a Car first.");
                  break;
               case '3':
                  if(bStart)
                     carLicense();
                  else
                     System.out.println("You need to add a Car first.");
                  break;
               case '4':
                  if(bStart)
                     carYear();
                  else
                     System.out.println("You need to add a Car first.");
                  break;
               case '5':
                  if(bStart)
                     carMake();
                  else
                     System.out.println("You need to add a Car first.");
                  break;
               case '6':
                  if(bStart)
                     carModel();
                  else
                     System.out.println("You need to add a Car first.");
                  break;
                case '7':
                  if(bStart)
                     getInfo();
                  else
                     System.out.println("You need to add a Car first.");
                  break;
               default:
                  System.out.println("Invalid selection!");
            }//switch

         }//if
         else
            System.out.println("Invalid selection");
      }//while
   }//main
   private static void addCar() throws Exception{
      InputStreamReader isr = new InputStreamReader(System.in);
      BufferedReader br = new BufferedReader(isr);
      String sUserInput = "";
      if(bStart) {
         System.out.println("Add a new car will erase your current car stored in memory. Continue?");
         sUserInput = br.readLine();
      }
      if(!bStart || (sUserInput.trim().length() > 0 && sUserInput.trim().toUpperCase().charAt(0) == 'Y')) {
         carMake();
         carModel();
         carLicense();
         carVIN();
         carYear();
         bStart = true;
      }
   }
   private static void carModel() throws Exception{
      InputStreamReader isr = new InputStreamReader(System.in);
      BufferedReader br = new BufferedReader(isr);
      String sUserInput = "";
      boolean bValid = true;
      while(bValid) {
         System.out.print("Please enter the car Model's name: ");
         sUserInput = br.readLine();
         try {
            car.setModel(sUserInput);
            bValid = false;
         }
         catch(CarException ce){
            System.out.println(ce.getMessage());
         }
      }
   }
   private static void carMake() throws Exception{
      InputStreamReader isr = new InputStreamReader(System.in);
      BufferedReader br = new BufferedReader(isr);
      String sUserInput = "";
      boolean bValid = true;
      while(bValid) {
         System.out.print("Please enter the car Maker's name: ");
         sUserInput = br.readLine();
         try {
            car.setMake(sUserInput);
            bValid = false;
         }
         catch(CarException ce){
            System.out.println(ce.getMessage());
         }
      }
   }
   private static void carLicense() throws Exception{
      InputStreamReader isr = new InputStreamReader(System.in);
      BufferedReader br = new BufferedReader(isr);
      boolean bValid = true;
      String sUserInput = "";
      while(bValid) {
         System.out.print("Please enter the car's license: ");
         sUserInput = br.readLine();
         try {
            car.setPlates(sUserInput);
            bValid = false;
         }
         catch(CarException ce){
            System.out.println(ce.getMessage());
         }
      }
   }
   private static void carVIN() throws Exception{
      InputStreamReader isr = new InputStreamReader(System.in);
      BufferedReader br = new BufferedReader(isr);
      boolean bValid = true;
      String sUserInput = "";
      while(bValid) {
         System.out.print("Please enter the car's Vin Number: ");
         sUserInput = br.readLine();
         try {

            car.setVin(Integer.parseInt(sUserInput));
            bValid = false;
         }
         catch(CarException ce){
            System.out.println(ce.getMessage());
         }
         catch(NumberFormatException nfe) {
            System.out.println("Number you've entered is invalid!");
         }
      }
   }
   private static void carYear() throws Exception{
      InputStreamReader isr = new InputStreamReader(System.in);
      BufferedReader br = new BufferedReader(isr);
      boolean bValid = true;
      String sUserInput = "";
      while(bValid) {
         System.out.print("Please enter the car's year: ");
         sUserInput = br.readLine();
         try {

            car.setYear(Integer.parseInt(sUserInput));
            bValid = false;
         }
         catch(CarException ce){
            System.out.println(ce.getMessage());
         }
         catch(NumberFormatException nfe) {
            System.out.println("Number you've entered is invalid!");
         }
      }
   }
   private static void getInfo(){
      System.out.println("--Information of your vehicle:");
      System.out.println(car);
      System.out.println("\n-----------END----------");
   }
}//class