import java.util.Scanner;

/**
 * This is the original version of TaxHelper. This class illustrates
 * the use of nested conditionals.
 */
public class TaxHelper{
    private Scanner scan;

    /**
     * Creates a new tax helper
     */
    public TaxHelper(){
        scan = new Scanner(System.in);
        printWelcomeMessage();   
    }

    /**
     * Helps the user determine whether or not they need to file taxes
     */
    public void determineFilingStatus(){
        System.out.println("Are you single? (y/n)");
        String input = scan.nextLine();

        // Single
        if(input.equals("y")){

            System.out.println("Are you under 65 years of age?");
            input = scan.nextLine();

            // Under 65 years old
            if(input.equals("y")){
                System.out.println("Is your gross income less than $8450?");
                input = scan.nextLine();

                // Less than income threshold
                if(input.equals("y")){
                    System.out.println("No, you do not need to file taxes");
                }

                // More than income threshold
                else{
                    System.out.println("Yes, you must file taxes");
                }                   
            }

            // Over 65 years old
            else{
                System.out.println("Is your gross income less than $9700?");
                input = scan.nextLine();

                // Less than income threshold
                if(input.equals("y")){
                    System.out.println("No, you do not need to file taxes");
                }

                // More than income threshold
                else{
                    System.out.println("Yes, you must file taxes");
                }   
            }
        }

        // Married
        else{
            System.out.println("Are you and your spouse both over 65?");
            input = scan.nextLine();

            // Over 65
            if(input.equals("y")){
                System.out.println("Is your combined gross income less than $23, 000?");
                input = scan.nextLine();

                // Less than income threshold
                if(input.equals("y")){
                    System.out.println("No, you do not need to file taxes");
                }

                // More than income threshold
                else{
                    System.out.println("Yes, you must file taxes");
                }   

            }

            // At least one person is under 65
            else{
                System.out.println("Are you and your spouse both under 65?");
                input = scan.nextLine();

                // Both under 65
                if(input.equals("y")){
                    System.out.println("Is your combined gross income less than $20,600?");
                    input = scan.nextLine();

                    // Less than income threshold
                    if(input.equals("y")){
                        System.out.println("No, you do not need to file taxes");
                    }

                    // More than income threshold
                    else{
                        System.out.println("Yes, you must file taxes");
                    }    
                }

                // One person over 65 and one person under 65
                else{
                   System.out.println("Is your combined gross income less than $21, 800?");
                   input = scan.nextLine();
                   
                   // Less than income threshold
                    if(input.equals("y")){
                       System.out.println("No, you do not need to file taxes");
                    }
                    
                    // More than income threshold
                   else{
                       System.out.println("Yes, you must file taxes");
                    }   
                }
            }
        }
    }

    /*================================================================
     *              Below are the private helper methods
     *================================================================*/

    /**
     * Prints a welcome message to the user
     */
    private void printWelcomeMessage(){
        System.out.println("=======================================");
        System.out.println("Welcome to the Tax Center!");
        System.out.println("We offer non-professional tax help.");
        System.out.println("Use at your own risk!");
        System.out.println();
    }
}