#ifndef MOVING_OBJECTS_H
#define MOVING_OBJECTS_H

struct Projectile : public MovingGameObject {
	Projectile() : MovingGameObject("Projectile") {
		dangerous = true;
	}
	bool init() override {
		init_from_object("ball.obj");
		setup_standard_shaders();
		setup_texture("brick.jpg");
		setup_locations();
		printf("vertices.size() %d\n", element_count);
		return true;
	}
	void movement() override {
		// Update positions!
		for(int i = 0; i < locations.size(); i++){
			locations[i].x += velocity[i].x;
			locations[i].y += velocity[i].y;
			if(locations[i].y < -1)
				velocity[i].y *= -1;
			locations[i].z += velocity[i].z;
			velocity[i].w -= 1.0;
			if(velocity[i].w < 0.0)
				remove(i);
		}
	}
	void draw(mat4 vp){
		update_locations(); // copy new locations to video memory
		draw_object(vp);
	}
	void contact_at(size_t idx){
		remove(idx);
	}	
};

struct Fragment : public MovingGameObject {
	Fragment() : MovingGameObject("Fragment") {
		dangerous = true;
	}
	bool init() override {
		init_from_object("ball.obj");
		setup_shaders("frag_vertex.glsl", "frag_fragment.glsl");
		setup_locations();
		return true;
	}
	void movement() override {
		// Update positions!
		for(int i = 0; i < locations.size(); i++){
			locations[i].x += velocity[i].x;
			locations[i].y += velocity[i].y;
			if(locations[i].y < -1)
				velocity[i].y *= -1;
			locations[i].z += velocity[i].z;
			velocity[i].w -= 1.0;
			if(velocity[i].w < 0.0){
				velocity[i] = velocity[velocity.size() - 1];
				velocity.pop_back();
				locations[i] = locations[locations.size() - 1];
				locations.pop_back();
			}
			velocity[i].y -= 0.001;
		}
	}
	void draw(mat4 vp) {
		update_locations(); // copy new locations to video memory
		glUseProgram(program);
		glUniformMatrix4fv(mvp_uniform, 1, 0, glm::value_ptr(vp));

		glEnableVertexAttribArray(vertex_attrib);
		glBindBuffer(GL_ARRAY_BUFFER, vbuf);
		glVertexAttribPointer(vertex_attrib, 3, GL_FLOAT, GL_FALSE, 0, 0);

		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebuf);
		glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, lbuf);
		glDrawElementsInstanced(GL_TRIANGLES, element_count, GL_UNSIGNED_INT, 0, locations.size());
	}	
};

EXTERN vector<GameObject*> objects;
EXTERN Fragment *fragments;
EXTERN Projectile *projectiles;

#endif