/**
 * A utility class that can be used to calculate sales
 * taxes on a collection of items
 *
 *
 * This work complies with the JMU Honor Code.
 *
 * @author  Steve Danielson
 * @version 1.0
 */
public class TaxCalculator
{
    public static int NON_FOOD        = 0;
    public static int FOOD            = 1;
    public static int PREPARED_FOOD   = 2;
    

    /**
     * Calculate the tax on the (non-prepared) food items
     *
     * @param prices      The prices of all items purchases
     * @param categories  The corresponding categories of all items purchases
     * @return            The tax
     */
    public static double foodTax(double[] prices, int[] categories)
    {
       double tax;
       
       tax = 0.0;
       for (int counter = 0; counter < prices.length; counter++) 
		 {
		 	if (categories[counter] == FOOD) 
			{
				tax += prices[counter]; 
			} // end if
		 } // end for
		 
		 tax = StateTaxes.foodTax(tax); 

       return tax;       
    } // end foodTax()


    /**
     * Calculate the tax on the non-food items
     *
     * @param prices      The prices of all items purchases
     * @param categories  The corresponding categories of all items purchases
     * @return            The tax
     */
    public static double nonfoodTax(double[] prices, int[] categories)
    {
       double tax;
       
       tax = 0.0;
       for (int counter = 0; counter < prices.length; counter++) 
		 {
		 	if (categories[counter] == NON_FOOD) 
			{
				tax += prices[counter]; 
			} // end if 
		 } // end for 
		 
		 tax = StateTaxes.salesTax(tax); 

       return tax;       
    } // end nonfoodTax()
    


    /**
     * Calculate the tax on the prepared food items
     *
     * @param prices      The prices of all items purchases
     * @param categories  The corresponding categories of all items purchases
     * @return            The tax
     */
    public static double preparedfoodTax(double[] prices, int[] categories)
    {
       double tax;
       
       tax = 0.0;
       for (int counter = 0; counter < prices.length; counter++) {
		 	if (categories[counter] == PREPARED_FOOD) 
			{
				tax += prices[counter]; 
			} // end if 
		 } // end for 
		 
		 tax = LocalTaxes.preparedFoodTax(tax); 

       return tax;       
    } // end preparedfoodTax()



    /**
     * Calculate the total value of all items purchased in
     * particular category
     *
     * @param prices      The prices of all items purchases
     * @param categories  The corresponding categories of all items purchases
     * @param categoryToInclude  The category of interest
     * @return            The total value of items in the given category
     */
    public static double total(double[] prices, int[] categories, 
                                int categoryToInclude)
    {
       double     total;
       
       total = 0.00;
       for (int counter = 0; counter < prices.length; counter++) 
		 {
		 	if (categories[counter] == categoryToInclude) 
			{
				total += prices[counter]; 
			} // end if 
		 } // end for 

       return total;       
    } // end total()
    
    
    /**
     * Determin if the given category is valid
     *
     * @param category   The category of interest
     * @return           true if the category is valid; false otherwise
     */
    public static boolean isValid(int category)
    {
       boolean     result;
       
       result = false;
		 if (category == 0 || category == 1 || category == 2) 
		 {
		 	result = true; 
		 } // end if 
       
       return result;       
    } // end isValid() 
    
} // end class