Magic Cube

///////////////////////////////////////////////////////////////////////////////////////////////////

// Copyright 2021 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Magic Cube.                                                              //

//                                                                                               //

// Magic Cube is proprietary software licensed under an EULA which you should have received      //

// along with the code. If not, check https://distorted.org/magic/License-Magic-Cube.html        //

///////////////////////////////////////////////////////////////////////////////////////////////////

package org.distorted.helpers;

import java.util.ArrayList;

import android.app.Activity;

import android.content.SharedPreferences;

import android.view.View;

import android.widget.LinearLayout;

import org.distorted.objectlib.helpers.MovesFinished;

import org.distorted.objectlib.main.ObjectControl;

import org.distorted.main.R;

import org.distorted.main.RubikActivity;

///////////////////////////////////////////////////////////////////////////////////////////////////

public class MovesController implements MovesFinished

  {

  private static final int MOVES_PLACE_0 = 100;

  private static final int MILLIS_PER_DEGREE = 6;

  private static class Move

    {

    private final int mAxis, mRow, mAngle;

    Move(int axis, int row, int angle)

      {

      mAxis = axis;

      mRow  = row;

      mAngle= angle;

      }

    }

  private final ArrayList<Move> mMoves;

  private boolean mCanPrevMove;

  private ObjectControl mControl;

  private TransparentImageButton mPrevButton;

///////////////////////////////////////////////////////////////////////////////////////////////////

// PUBLIC API

  public MovesController()

    {

    mCanPrevMove = true;

    mMoves       = new ArrayList<>();

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  private int getPrevIcon(boolean on)

    {

    if( on )

      {

      return RubikActivity.getDrawable(R.drawable.ui_small_cube_back,

                                       R.drawable.ui_medium_cube_back,

                                       R.drawable.ui_big_cube_back,

                                       R.drawable.ui_huge_cube_back);

      }

    else

      {

      return RubikActivity.getDrawable(R.drawable.ui_small_cube_grey,

                                       R.drawable.ui_medium_cube_grey,

                                       R.drawable.ui_big_cube_grey,

                                       R.drawable.ui_huge_cube_grey);

      }

    }

//////////////////////////////////////////////////////////////////////////////////////////////////

  public void backMove(Activity act, ObjectControl control)

    {

    if( mCanPrevMove )

      {

      int numMoves = mMoves.size();

      if( numMoves>0 )

        {

        Move move   = mMoves.remove(numMoves-1);

        int axis    = move.mAxis;

        int angle   = move.mAngle;

        if( angle!=0 )

          {

          mCanPrevMove = false;

          mControl = control;

          mControl.blockTouch(MOVES_PLACE_0);

          mControl.addRotation(this, axis, (1<<move.mRow), -angle, MILLIS_PER_DEGREE);

          }

        else

          {

          android.util.Log.e("solution", "error: trying to back move of angle 0");

          }

        if( numMoves==1 ) changeBackMove(act, false);

        }

      }

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  private void changeBackMove(Activity act, final boolean on)

    {

    act.runOnUiThread(new Runnable()

      {

      @Override

      public void run()

        {

        if( mPrevButton!=null )

          mPrevButton.setIconResource(getPrevIcon(on));

        }

      });

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public void addMove(Activity act, int axis, int row, int angle)

    {

    if( mMoves.isEmpty() ) changeBackMove(act,true);

    mMoves.add(new Move(axis,row,angle));

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public void onActionFinished(final long effectID)

    {

    mCanPrevMove = true;

    mControl.unblockTouch();

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public void clearMoves(final Activity act)

    {

    mMoves.clear();

    changeBackMove(act,false);

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public int getNumMoves()

    {

    return mMoves.size();

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public void setupButton(final Activity act, ObjectControl control)

    {

    final int icon = getPrevIcon( !mMoves.isEmpty() );

    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT,1.0f);

    mPrevButton = new TransparentImageButton(act, icon, TransparentImageButton.GRAVITY_MIDDLE, params);

    mPrevButton.setOnClickListener( new View.OnClickListener()

      {

      @Override

      public void onClick(View v)

        {

        backMove(act,control);

        }

      });

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public void savePreferences(String key, SharedPreferences.Editor editor)

      {

      StringBuilder moves = new StringBuilder();

      int numMoves = getNumMoves();

      for(int m=0; m<numMoves; m++)

        {

        Move move = mMoves.get(m);

        if( m>0 ) moves.append(' ');

        moves.append(move.mAxis);

        moves.append(' ');

        moves.append(move.mRow);

        moves.append(' ');

        moves.append(move.mAngle);

        }

      editor.putString( key, moves.toString() );

      editor.apply();

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public void restorePreferences(Activity act, String key, SharedPreferences preferences)

      {

      String objects = preferences.getString( key,"");

      if( objects.length()>0 )

        {

        String[] tokens = objects.split(" ");

        int length = tokens.length;

        for(int m=0; m<length/3; m++)

          {

          String axis  = tokens[3*m  ];

          String row   = tokens[3*m+1];

          String angle = tokens[3*m+2];

          try

            {

            int axisI = Integer.parseInt(axis);

            int rowI  = Integer.parseInt(row);

            int angleI= Integer.parseInt(angle);

            addMove(act,axisI,rowI,angleI);

            }

          catch(NumberFormatException ex)

            {

            // ignore

            android.util.Log.e("D", "exception: "+ex.getMessage());

            }

          }

        }

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public TransparentImageButton getButton()

    {

    return mPrevButton;

    }

  }