package projectileProject;
import javax.swing.JOptionPane;

public class Projectile {



		public static void main(String[] args) {
		String task, task1, title;
		final int GRAVITATION = 32;
		final double distanceToTarget;
		double initialVelocity;
		double launchAngle; //changing variable
		double radian; //changing variable
		double flightTime;
		double highestPoint;
		double distanceTraveled;
		double error;
		double minError;



		String trajectory;
		task = "Enter distance to target in feet";
		title = "input";

		distanceToTarget = Double.parseDouble(JOptionPane.showInputDialog(null, task, title,
						   JOptionPane.CANCEL_OPTION));

		task = "Enter initial velocity in feet/sec: ";

		initialVelocity = Double.parseDouble(JOptionPane.showInputDialog(null, task, title,
						  JOptionPane.CANCEL_OPTION));


		task = "Enter the launch angle in degrees. \n" +
			   "The initial choice must be a 45 degree angle: ";
		launchAngle = Double.parseDouble(JOptionPane.showInputDialog(null, task, title,
										JOptionPane.QUESTION_MESSAGE));


		radian = (launchAngle * Math.PI / 180);
		flightTime = (2 * initialVelocity * Math.sin(radian))/GRAVITATION;
		highestPoint = (initialVelocity * Math.sin(radian))*(flightTime/2) -
					   0.5 * GRAVITATION * Math.pow(flightTime/2, 2);
		distanceTraveled = (initialVelocity * Math.cos(radian) * flightTime);
		error = (distanceTraveled - distanceToTarget);
		minError = Math.abs(error);

		trajectory = String.format("initial velocity: %.2f feet/seconds\n" +
								   "launch angle: %.2f degrees\n" +
								   "flight time: %.2f seconds\n" +
								   "maximum height: %.2f feet\n" +
								   "distance traveled: %.2f feet\n" +
								   "target missed by: %.2f feet\n",
								   initialVelocity, launchAngle, flightTime,
								   highestPoint, distanceTraveled, error);

		JOptionPane.showMessageDialog(null, trajectory);








		if (error < 0) {
		System.out.printf("Target missed by %f.2! Adjust launch angle up and try again", error);
		}
		else if (error > 1) {
		System.out.printf("Target missed by %f.2! Adjust launch angle down and try again", error);

		}

		double launchAngleTwo;
		double radianTwo;
		String trajectoryTwo;



		task = "Enter the launch angle in degrees. \n";

		launchAngleTwo = Double.parseDouble(JOptionPane.showInputDialog(null, task, title,
										JOptionPane.QUESTION_MESSAGE));


		radianTwo = launchAngleTwo * Math.PI / 180;
		flightTime = (2 * initialVelocity * Math.sin(radianTwo))/GRAVITATION;
		highestPoint = (initialVelocity * Math.sin(radianTwo))*(flightTime/2) -
					   0.5 * GRAVITATION * Math.pow(flightTime/2, 2);
		distanceTraveled = (initialVelocity * Math.cos(radianTwo) * flightTime);
		error = distanceTraveled - distanceToTarget;

		trajectoryTwo = String.format("initial velocity: %.2f feet/seconds\n" +
				   "launch angle: %.2f degrees\n" +
				   "flight time: %.2f seconds\n" +
				   "maximum height: %.2f feet\n" +
				   "distance traveled: %.2f feet\n" +
				   "target missed by: %.2f feet\n",
				   initialVelocity, launchAngleTwo, flightTime,
				   highestPoint, distanceTraveled, Math.abs(error));

		JOptionPane.showMessageDialog(null, trajectoryTwo);

		System.out.println("\n");

		if (Math.abs(error) < 0) {
			System.out.printf("Target missed by %f.2! Adjust launch angle up and try again", Math.abs(error));
			}
			else if (Math.abs(error) > 0) {
			System.out.printf("Target missed by %f.2! Adjust launch angle down and try again", Math.abs(error));

			}
















		System.exit(0);


	}

}