/*
 * Temperature.java
 * 
 * Computer Science 112, Boston University
 * 
 * Temperature class representing a temperature value with a scale (Celsius or Fahrenheit)
 */

class Temperature {
    // Fields to store temperature value and scale
    private double temperature;
    private String scale;

    /*
     * Constructor to initialize temperature and scale
     * We make them private to prevent direct access from outside the class.
     */
    public Temperature(double temperature, String scale) {
        this.setScale(scale);
        this.setTemperature(temperature);
    }

    /*
     * An accessor method method to retrieve the temperature value
     */
    public double getTemperature() {
        return temperature;
    }

    /*
     * Setter method to set the temperature value
     */
    public void setTemperature(double temperature) {
        if (this.getScale().equals("celsius") && temperature > -273.15 ||
                this.getScale().equals("fahrenheit") && temperature > -459.67)
            this.temperature = temperature;
        else
            throw new IllegalArgumentException();
    }

    /*
     * Getter method to retrieve the scale (Celsius or Fahrenheit)
     */
    public String getScale() {
        return scale.toLowerCase();
    }

    /*
     * Setter method to set the scale (Celsius or Fahrenheit)
     */
    public void setScale(String scale) {
        if (scale.toLowerCase().equals("celsius") ||
                scale.toLowerCase().equals("fahrenheit")) {
            this.scale = scale.toLowerCase();
        } else
            throw new IllegalArgumentException();

    }

    /*
     * Method to convert temperature to Celsius
     */
    public double toCelsius() {
        if (scale.equals("fahrenheit")) {
            return (temperature - 32) * 5 / 9;
        } else {
            return temperature; // If already in Celsius, return the temperature value
        }
    }

    /*
     * Method to convert temperature to Fahrenheit
     */
    public double toFahrenheit() {
        if (scale.equals("celsius")) {
            return (temperature * 9 / 5) + 32;
        } else {
            return temperature; // If already in Fahrenheit, return the temperature value
        }
    }
}