package com.javisjava.processing;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

import ddf.minim.AudioSnippet;
import ddf.minim.Minim;

import processing.core.PApplet;

@SuppressWarnings("serial")
public class Rain extends PApplet {

	ArrayList<Drop> drops;

	Map<Integer, Integer> lightningFrames = new HashMap<Integer, Integer>();
	float lightningBackground = 0;

	Minim minim;
	AudioSnippet thunder;

	public void setup() {
		drops = new ArrayList<Drop>();
		size(400, 400);
		for (float i = 0; i < 400; i += 15) {
			for (float j = 0; j < 400; j += 15) {
				drops.add(new Drop(i + random(9), j + random(9)));
			}
		}

		lightningFrames.put(1, 0);
		lightningFrames.put(3, 60);
		lightningFrames.put(5, 70);
		lightningFrames.put(7, 100);
		lightningFrames.put(9, 60);
		lightningFrames.put(11, 100);
		lightningFrames.put(13, 80);
		lightningFrames.put(16, 60);
		lightningFrames.put(18, 40);
		lightningFrames.put(20, 35);
		lightningFrames.put(22, 30);
		lightningFrames.put(24, 25);
		lightningFrames.put(26, 20);
		lightningFrames.put(28, 10);
		lightningFrames.put(30, 5);
		lightningFrames.put(32, 0);

		minim = new Minim(this);
		thunder = minim.loadSnippet("thunder.mp3");
		thunder.loop();
		thunder.pause();

	}

	public void draw() {

		int lightningFrame = frameCount % 600;
		if (lightningFrames.get(lightningFrame) != null) {
			lightningBackground = 255 * lightningFrames.get(lightningFrame) / 100;
		}

		background(lightningBackground);
		float wind = mouseX / 400f;
		for (int i = 0; i < drops.size(); i++) {
			Drop drop = (Drop) drops.get(i);
			stroke(255 - 150 * drop.y / 400f - 100 * wind);
			line(drop.x, drop.y, drop.x + 2 + wind, drop.y + 4 - wind);
			drop.y += 5;
			if (drop.y >= 405) {
				drop.y -= 405;
			}
			drop.x += wind;
			if (drop.x >= 405) {
				drop.x -= 405;
			}
			float distance2 = (drop.x - mouseX) * (drop.x - mouseX) + (drop.y - mouseY) * (drop.y - mouseY);
			if (distance2 < 100 * 100 + random(10000) && mouseX > 10 && mouseX < 390) {
				drop.x += 100 * (drop.x - mouseX) / distance2;
				drop.y += 100 * (drop.y - mouseY) / distance2;
			} else {
				drop.x += ((i * 15) - drop.x) / 1000;
				drop.y += ((i * 15) - drop.y) / 1000;

			}
		}
	}

	public void stop() {
		minim.stop();
		super.stop();
	}

	public void mouseClicked() {
		if (thunder.isPlaying()) {
			thunder.pause();
		} else {
			thunder.play();
		}
	}

	class Drop {
		float x, y;

		Drop(float x, float y) {
			this.x = x;
			this.y = y;
		}
	}

	public static void main(String[] args) {
		PApplet.main(new String[] { "com.javisjava.processing.Rain" });
	}

}