import raytracer.ABunchOfSpheres;

import java.lang.ArrayIndexOutOfBoundsException;
import java.lang.NumberFormatException;

public class MakeMovie {

    public MakeMovie(int num_frames) {

        // Create a movie object
        ABunchOfSpheres movie = new ABunchOfSpheres();
        // Render the frames
        for (int count = 0; count < num_frames; count++) {
            movie.render_scene("./frame_" + String.format("%05d", count) + ".png", count);
        }
    }

    private static void abort(String message) {
        System.err.println(message);
        System.exit(1);
    }

    public static void main(String[] args) {
        int num_frames = 0;
        try {
             num_frames = Integer.parseInt(args[0]);
        } catch (NumberFormatException e) {
            abort("Invalid number of frames (should be an integer)");
        } catch (ArrayIndexOutOfBoundsException e) {
            abort("Usage: java MakeMovie <num of frames>");
        }
        if (num_frames < 0) {
            abort("Invalid number of frames (should be positive)");
        }
        new MakeMovie(num_frames);
    }
}