/**
 * This is the compensation model for a sale's person's annual income. The
 * compensation model works as follows: - Each sales person has a base salary of
 * $53,000 - To receive a 5% bonus commission, they must meet 80% of their sales
 * target of $135,000 - If the meet or exceed 100% of their sales target, an
 * additional 1.1 multipler is applied
 *
 * @author Tony Simons
 */
public class CompensationModel {
    // Base salary of the sales person
    private final double BASE_SALARY = 53000;
    // The comission bonus percentage
    private final double BONUS_PERCENTAGE = 5.0;
    // The annual sales target.  If sales person meets COMMSSION_THRESHOLD_PERCENTAGE of this target
    // they will have a bonus.
    private final double SALES_TARGET = 135000;
    // Sales person must meet this percentage of their sales target to get a bonus
    private final double COMMISSION_THRESHOLD_PERCENTAGE = 80.0;
    // If the sales person meets 100% of the sales target, then this factor is applied to their bonus.
    private final double ACCELERATION_FACTOR = 1.1;

    // How much the person sold this year.
    private double salesAmount;

    /**
     * @return base salary of employee
     */
    public double getSalary() {
        return BASE_SALARY;
    }

    /**
     * @return the bonus percentage
     */
    public double getBonusPercentage() {
        return BONUS_PERCENTAGE;
    }

    /**
     * @param salesAmount The amount of sales the person achieved
     */
    public void setSalesAmount(double salesAmount) {
        this.salesAmount = salesAmount;
    }

    /**
     * @return the commission of the employee based on his actual sales amount
     */
    public double getSalesCommission() {
        return getSalesCommission(salesAmount);
    }

    /**
     * @return the theoretical commission he would've earned had he made annualSales amount this year.
     */
    public double getSalesCommission(double annualSales) {
        double commission = 0;
        if (annualSales >= COMMISSION_THRESHOLD_PERCENTAGE / 100.0 * SALES_TARGET) {
            commission = annualSales * BONUS_PERCENTAGE / 100.0;
            if (annualSales >= SALES_TARGET) {
                commission *= ACCELERATION_FACTOR;
            }
        }
        return commission;
    }

    /**
     * @return the employee's total compensation
     */
    public double getTotalCompensation() {
        return getSalesCommission() + BASE_SALARY;
    }
}