import java.time.LocalDate;
import java.time.Period;

/**
 * A horse, of course.
 * @author Maxwell Terpstra
 */
public class Horse {
    /**
     * The name of this horse.
     */
    public String name;

    private final String breed;
    private final LocalDate born;

    public static final int[] PONY_STALL_SIZE = { 200, 100 };
    public static final int[] LARGE_STALL_SIZE = { 400, 300 };
    public static final int[] STANDARD_STALL_SIZE = { 400, 200 };

    /**
     * Create a newborn, unnamed horse.
     * @param breed horse breed (in lower case)
     */
    public Horse(String breed) {
        this(breed, null, LocalDate.now());
    }

    /**
     * Create a Horse that was born some time ago.
     * @param breed horse breed (in lower case)
     * @param name name of the horse
     * @param born date the horse was born
     */
    public Horse(String breed, String name, LocalDate born) {
        this.breed = breed;
        this.name = name;
        this.born = born;
    }

    /**
     * Whether or not the given breed is described as a "pony"
     * @param breed horse breed (in lower case)
     * @return true if the breed is classified as a pony
     */
    public static boolean isPony(String breed) {
        switch (breed) {
            case "shetland":
            case "guoxia":
            case "danish sport":
                return true;
            default:
                return false;
        }
    }

    /**
     * Get the age (in years) of this horse.
     * @return number of years old
     */
    public int getAge() {
        return Period.between(LocalDate.now(), born).getYears();
    }

    /**
     * Get the minimum size of stall needed to stable this horse.
     * @return an array of [length, width] measurements in centimeters
     */
    public int[] size() {
        if (Horse.isPony(this.breed)) {
            return PONY_STALL_SIZE;
        } else {
            switch (breed) {
                case "arabian":
                    return LARGE_STALL_SIZE;
                default:
                    return STANDARD_STALL_SIZE;
            }
        }
    }

    /**
     * Whether or not this breed requires a heated stable.
     * @return true if the this horse breed is known to have poor health
     *     outcomes in unheated stables
     */
    public boolean needsHeat() {
        return Horse.isPony(this.breed);
    }
}