#ifndef PORTAL_H_
#define PORTAL_H_

#include "LevelObject.h"
#include "Polygon.h"
#include "VertexProvider.h"
#include "LevelVertex.h"
#include <math.h>


class Portal : public LevelObject, public VertexProvider {
  private:
    float width, height, thickness;
    Vertex pos;
    float orient;
    
    Vertex vertices[4];
    float s, c;
    
    
    void updateVertices() {
      float x = width/2*c;
      float y = width/2*s;
      float ts = thickness/2*s;
      float tc = thickness/2*c;
      
      vertices[0].setLocation(pos.getX()-x-ts, pos.getY()-y+tc);
      vertices[1].setLocation(pos.getX()-x+ts, pos.getY()-y-tc);
      vertices[2].setLocation(pos.getX()+x+ts, pos.getY()+y-tc);
      vertices[3].setLocation(pos.getX()+x-ts, pos.getY()+y+tc);
    }
    
    void updateOrient() {
      s = sinf(orient);
      c = cosf(orient);
      
      updateVertices();
    }
    
    Polygon createPolygon() const {
      Polygon p;
      
      for(int i = 0; i < 4; i++)
        p.push_back(vertices[i]);
      
      return p;
    }
    
  public:
    Portal(float width, float height, float thickness) {
      this->width = width;
      this->height = height;
      this->thickness = thickness;
      
      orient = 0;
      
      updateOrient();
    }
    
    float getWidth() const {return width;}
    float getHeight() const {return height;}
    float getThickness() const {return thickness;}
    
    const Vertex& getPosition() const {return pos;}
    void setPosition(Vertex v) {pos = v; updateVertices();}
    
    float getOrientation() const {return orient;}
    void setOrientation(float orient) {this->orient = orient; updateOrient();}
    
    virtual std::vector<SharedPtr<LevelObject> > getChildren() {
      std::vector<SharedPtr<LevelObject> > children;
      
      for(size_t i = 0; i < 4; i++)
        children.push_back(SharedPtr<LevelObject>(new LevelVertex(this, i, this)));
      
      return children;
    }
    
    virtual bool hit(const Vertex &v) const {return createPolygon().contains(v);}
    virtual int getPriority() const {return 1;}
    
    virtual const char* getType() const {
      return "Portal";
    }
    
    virtual void move(float x, float y) {
      pos += Vertex(x, y);
      updateVertices();
    }
    
    virtual void rotate(Vertex m, float a) {
      orient = fmodf(orient+a, 2*M_PI);
      
      s = sinf(a);
      c = cosf(a);
      
      pos -= m;
      pos.setLocation(c*pos.getX() - s*pos.getY(), c*pos.getY() + s*pos.getX());
      pos += m;
      
      updateOrient();
    }
    
    virtual const Vertex* getVertex(size_t id) const {
      return &vertices[id];
    }
    
    virtual size_t getVertexCount() const {
      return 1;
    }
    
    virtual void moveVertex(size_t id, float x, float y) {
      move(x, y);
    }
    
    virtual void rotateVertex(size_t id, Vertex m, float a) {
      rotate(m, a);
    }
};

#endif /*PORTAL_H_*/