import processing.opengl.*;
import anar.*;


import java.util.*;

import lsys.Grammar;



/*
 * Example for Anar library by Guillaume LaBelle + Julien Nembrini
 * http://anar.ch
 */


Pts       ptsA = new Pts();


Pts       pts;
Param     param;

Grammar   grammar;

Obj       faces;
Obj       lines;

Transform T;

Translate t;
Transform r;
Scale     s;

Sliders   mySlider;


void setup(){
    size(800,400,OPENGL);
  Anar.init(this);
  initGrammar();
  initForm();
  interpretGrammar();
}

void initGrammar(){
  grammar = new Grammar("fg");
  // here define the rules
  // * means any kind of symbol
  // the example rules below are therefore non contextual
  grammar.addRule("*f*","fg[gf][hfh]");
  grammar.addRule("*g*","gg[hif]");
  grammar.addRule("*h*","ghjh");
  grammar.addRule("*j*","[gih]");
  // this one makes it context dependant
  grammar.addRule("igh","[ghfg]");

  println(grammar);

}

void initForm(){
  faces = new Obj();

  t = new Translate(0,0,10);

  param = new Param(10);
  mySlider = new Sliders(faces);

}


void interpretGrammar(){

  faces = new Obj();
  lines = new Obj();

  Pt p = Anar.Pt( -30,0,0);
  Pt q = Anar.Pt(30,0,0);


  Pts seedSeg = new PtsMid(p,q,param);
  Pts currentFace = seedSeg;

  Pts stackA = new Pts();
  int indexA = 0;
  Pt turtleA = seedSeg.pt(indexA);

  ArrayList stackPtsA = new ArrayList();
  Pts ptsCollectorA = new Pts();
  ptsCollectorA.add(turtleA);


  Iterator it = grammar.getSentence().iterator();
  while (it.hasNext()){
    String str = (String)it.next();

    switch(str.charAt(0)){
      case 'f':
        // create translated copy from current face
        Pts pts = new PtsMid(Anar.Pt(currentFace.pt(0),t),Anar.Pt(currentFace.pt(currentFace.size()-1),t),param);
        // pts = new Pts();
        // Iterator<Pt> itFace = currentFace.iterator();
        // while (itFace.hasNext()) {
        // pts.add(Anar.Pt(itFace.next(), t));
        // }
        // TODO (1) add size() method to Face
        // TODO (1) transform the face (missing methods)
        faces.add(pts);

        // move the turtle to the next face
        currentFace = pts;
        indexA %= currentFace.numOfPts();
        turtleA = currentFace.pt(indexA);

      case 'g':
        indexA = (indexA+1)%currentFace.numOfPts();
        turtleA = currentFace.pt(indexA);

      break;
      case 'h':
        indexA = (indexA+currentFace.numOfPts()-1)%currentFace.numOfPts();
        turtleA = currentFace.pt(indexA);

      break;
      case 'i':
        indexA = (indexA+2)%currentFace.numOfPts();
        turtleA = currentFace.pt(indexA);

      break;
      case 'j':
        indexA = (indexA+currentFace.numOfPts()-2)%currentFace.numOfPts();
        turtleA = currentFace.pt(indexA);

      break;
      case '[':
        stackA.add(turtleA);
        stackPtsA.add(ptsCollectorA);
        ptsCollectorA = new Pts();
        ptsCollectorA.add(turtleA);

      break;
      case ']':
        ptsCollectorA.add(turtleA);
        turtleA = stackA.remove(stackA.size()-1);
        lines.add(ptsCollectorA);
        ptsCollectorA = (Pts)stackPtsA.remove(stackPtsA.size()-1);

      break;
      default:
      break;
    }
  }
  lines.pts.render = new RenderPtsLine(new AColor(128));

  Anar.camTarget(faces);
  mySlider = new Sliders(lines);

}

void draw(){
  if(frameCount%2==0)
    background(155);
  else
    background(153);

  faces.draw();
  lines.draw();
  mySlider.draw();

}


void keyPressed(){
  if(key=='a'){
    grammar.step();
    println(grammar);
    interpretGrammar();
  }
  if(key=='s'){
    grammar.reset();
    println(grammar);
    interpretGrammar();

  }
}