package sk.neuromancer.sphaera.rewrite;

import java.util.Collection;
import java.util.LinkedList;
import java.util.List;

import sk.neuromancer.sphaera.interf.Collidable;
import sk.neuromancer.sphaera.interf.Moveable;
import sk.neuromancer.sphaera.interf.Renderable;

import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.VertexAttributes.Usage;
import com.badlogic.gdx.graphics.g3d.Environment;
import com.badlogic.gdx.graphics.g3d.Material;
import com.badlogic.gdx.graphics.g3d.ModelBatch;
import com.badlogic.gdx.graphics.g3d.ModelInstance;
import com.badlogic.gdx.graphics.g3d.attributes.ColorAttribute;
import com.badlogic.gdx.graphics.g3d.utils.ModelBuilder;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.utils.Disposable;

public class Sphere implements Renderable, Moveable, Collidable, Disposable{
    private static final int MAX_DIV = 50;
    private static final int DIV = 12;

    public static final float BASE_RADIUS = 50f;

    public static final Color DEFAULT_DIFFUSE = new Color(0.9f, 0.9f, 0.9f, 1f);
    public static final Color DEFAULT_SPECULAR = new Color(0.5f, 0.5f, 0.5f, 0.5f);
    public static final Color DEFAULT_AMBIENT = new Color(1f, 1f, 1f, 0.5f);
    public static final Color DEFAULT_REFLECTION = new Color(0.5f, 0.5f, 0.5f, 0.5f);
    
    public static final Color SMALLER_DIFFUSE = new Color(0.05f, 0.05f, 0.9f, 1f);
    
    public static final Color BIGGER_DIFFUSE = new Color(0.7f, 0.1f, 0.1f, 1f);

    public static final Material BASE_MAT = new Material(ColorAttribute.createDiffuse(DEFAULT_DIFFUSE),
            ColorAttribute.createReflection(DEFAULT_SPECULAR),
            ColorAttribute.createAmbient(DEFAULT_AMBIENT),
            ColorAttribute.createReflection(DEFAULT_REFLECTION)
            );
    
    public static final Material SMALLER_MAT = new Material(ColorAttribute.createDiffuse(SMALLER_DIFFUSE),
            ColorAttribute.createReflection(DEFAULT_SPECULAR),
            ColorAttribute.createAmbient(DEFAULT_AMBIENT),
            ColorAttribute.createReflection(DEFAULT_REFLECTION)
            );
    
    public static final Material BIGGER_MAT = new Material(ColorAttribute.createDiffuse(BIGGER_DIFFUSE),
            ColorAttribute.createReflection(DEFAULT_SPECULAR),
            ColorAttribute.createAmbient(DEFAULT_AMBIENT),
            ColorAttribute.createReflection(DEFAULT_REFLECTION)
            );

    private Sphere parent = null;//if parent null, then 
    private List<Sphere> children = new LinkedList<Sphere>();

    private ModelInstance model;

    private float radius;

    /**
     * Both positions are relative to the parent,
     * if parent == null, then they are absolute.
     */
    private Vector3 position;
    private Vector3 sphericalPosition;//degrees

    /*
     * Dunno if Ill use it...
     */
    private Vector3 velocity;

    public Sphere(){
        this.position = Vector3.Zero.cpy();
        this.sphericalPosition = Vector3.Zero.cpy();
        this.velocity = Vector3.Zero.cpy();
    }

    public Sphere(float radius){
        this();
        this.radius = radius;
    }

    public Sphere(float radius, Material... mat){
        this(radius);
        ModelBuilder mb = new ModelBuilder();
        int div = Math.min(MAX_DIV, (int) radius * DIV);
        if(this instanceof Player){
            div = MAX_DIV;
        }
        this.model = new ModelInstance(mb.createSphere(2, 2, 2, div, div, mat[0], Usage.Position | Usage.Normal));
        /*for(Material m : mat){
            this.model.materials.add(m);
        }*/
    }

    public Sphere(float x, float y, float z, float radius, Material... mat){
        this(radius, mat);
        this.position.x = x;
        this.position.y = y;
        this.position.z = z;
        this.sphericalPosition = SphereUtils.toSphericalDeg(x, y, z);
    }

    public Sphere(Sphere parent, float a, float b, float radius, Material... mat){
        this(radius, mat);
        this.parent = parent;
        this.sphericalPosition.x = parent.getRadius() + this.radius;
        this.sphericalPosition.y = a;
        this.sphericalPosition.z = b;
        this.position = SphereUtils.toCartesianDeg(this.sphericalPosition.x, a, b);
    }

    public Sphere getParent() {
        return this.parent;
    }

    public void setParent(Sphere newParent){
        if(this.parent != null){
            this.parent.removeChildren(this);
        }
        this.parent = newParent;
        this.parent.addChildren(this);
    }

    public boolean addChildren(Sphere child){
        return this.children.add(child);
    }

    public boolean removeChildren(Sphere child){
        return this.children.remove(child);
    }

    public Collection<Sphere> getChildren(){
        return new LinkedList<Sphere>(this.children);
    }

    public float getRadius() {
        return this.radius;
    }

    public void setRadius(float radius){
        this.radius = radius;
    }

    public void scaleRadius(float newRadius){
        Vector3 newSpherical = this.getSphericalPosition();
        if(this.getParent() != null){
            newSpherical.x = this.getParent().getRadius() + newRadius;
        }
        Vector3 newRelative = this.getRelativePosition();
        newRelative.setLength(this.getParent().getRadius() + newRadius);
        this.setSphericalPosition(newSpherical);
        this.setRelativePosition(newRelative);
        this.setRadius(newRadius);
    }

    public void setSphericalPosition(Vector3 spherical){
        this.sphericalPosition = spherical.cpy();
    }

    public void setRelativePosition(Vector3 relative){
        this.position = relative.cpy();
    }

    public void setPositionSpherical(Vector3 spherical){
        //both
        this.setSphericalPosition(spherical);
        this.setRelativePosition(SphereUtils.toCartesianDeg(spherical));
    }

    public void setPositionRelative(Vector3 relative){
        //both
        this.setRelativePosition(relative);
        this.setSphericalPosition(SphereUtils.toSphericalDeg(relative));
    }

    public Vector3 getSphericalPosition(){
        return this.sphericalPosition.cpy();
    }

    public Vector3 getAbsolutePosition(){
        if(this.parent == null){
            return this.getRelativePosition();
        }
        return this.position.cpy().add(this.getParent().getAbsolutePosition());
    }

    public Vector3 getRelativePosition(){
        return this.position.cpy();
    }

    public void dropOnParent(Vector3 oldParentPos){
        if(this.parent == null){
            return;
        }

        Vector3 absolutePos = oldParentPos.add(this.position);
        Vector3 fromParent = absolutePos.cpy().sub(this.parent.getAbsolutePosition());
        fromParent.setLength(this.parent.getRadius() + this.radius);
        this.setPositionRelative(fromParent);
    }

    public void dropOnParent(Sphere oldParent){
        this.dropOnParent(oldParent.getAbsolutePosition());
        /*potrebujem absolutne pozicie
         *OH SHIT!
         *mam problem, musim toto riesit pri zmene parenta!!
         *pretoze tu uz nemam toho stareho takze getAbsolutePosition je BS aj getRelative...
         */
    }

    public void putOnParent(float polar, float azimuth){
        if(this.getParent() == null)
            return;

        float completeRadius = this.getParent().getRadius() + this.getRadius();
        this.setPositionSpherical(new Vector3(completeRadius, polar, azimuth));
    }
    
    public void setColorAttributes(ColorAttribute... attribs){
        this.model.materials.get(0).set(attribs);
    }

    @Override
    public void render(ModelBatch renderer, Environment environment) {
        model.transform.setToTranslation(this.getAbsolutePosition());
        model.transform.scale(radius,radius,radius);
        renderer.render(model, environment);
    }

    @Override
    public Vector3 getVelocity(){
        return this.velocity.cpy();
    }

    public void setVelocity(Vector3 velocity){
        this.velocity = velocity;
    }

    public void move(){
        //all the way
        this.move(1);
    }

    @Override
    public void move(float howMuch){
        if(this.velocity.len() == 0)
            return;
        this.velocity.scl(howMuch);
        this.setPositionRelative(this.getRelativePosition().add(this.velocity));
        this.velocity = Vector3.Zero.cpy();
        //maybe leave velocity as the rest I want to go?
        //that way I can call move again and hope I 
    }

    @Override
    public boolean collides(Sphere other) {
        if(this.getParent() != null && other.getParent() != null){
            return this.getRelativePosition().sub(other.getRelativePosition()).len() < this.getRadius() + other.getRadius();
        }
        return this.getAbsolutePosition().sub(other.getAbsolutePosition()).len() < this.getRadius() + other.getRadius();
    }

    @Override
    public String toString(){
        return "Sphere" + ":" + /*this.hashCode() +*/ "\n" +
                "   radius=" + this.getRadius() + "\n" +
                "   spherical=" + this.getSphericalPosition() + "\n" +
                "   relative=" + this.getRelativePosition();
    }

    @Override
    public void dispose() {
        this.model.model.dispose();
    }
    
}