//  Homework 8
//  Amy Nichols
//  Section D
//  aenichol@andrew.cmu.edu



  int [ ] yValues = { 40, 20, 60, 70, 40, 40, 30, 80, 50, 120, 40, 80, 80, 10, 50, 70, 90 };
  //int [ ] yValues = { 40, 20, 60, 70, 10, 10, 10, 80, 50, 100 };
  //int [ ] yValues = { 40, 20, 60, 70, 40, 10 };
  
  int horizontalScale;
  int yAxis;
  int highValueIndex = findHighValueIndex( );
  int lowValueIndex = findLowValueIndex( );

  PFont f1;


  void setup( )
  {
     size( 500, 300 );
     background( 0, 0, 255);
   
     yAxis = 200;
     
     f1 = loadFont("f1.vlw");
     textFont( f1 );
     fill( 255 );
   
     text( "Total rise of the graph is " + sumRise( )  , width*.1, height*.9);
   
     text( "Total fall of the graph is " + sumFall( ) , width*.5, height*.9);
   
     horizontalScale = (width-20)/yValues.length;
 
     plotPoints( );
     drawHighMarker( );
     drawLowMarker( );
     drawLines( );
     drawBall( );

  }



  void plotPoints( )
  {
    stroke(#FF0000);
    line(0, yAxis, width, yAxis);
  
    strokeWeight(4);
    stroke(#FFFFFF);
 
    for(int i = 0; i < yValues.length; i++)
    {
     point((i+1)*horizontalScale, yAxis - yValues[i]);
    }
 
    for(int i = 0; i < yValues.length; i++)
    {
    text(yValues[i], ((i+1)*horizontalScale)-7, (yAxis - yValues[i])+20);
    } 
  }

  void drawLines( )
  {
    stroke(#FF0000);
    for(int i = 0; i < yValues.length-1; i++)
    {
      line((i+1)*horizontalScale, yAxis - yValues[i], (i+2)*horizontalScale, yAxis - yValues[i+1]);
    }
  }


  int findHighValueIndex( )
  {
    int highIndex = 0;
  
    for(int i = 1  ; i < yValues.length  ; i++ )
    {
      if ( yValues[i] > yValues [highIndex] )
      {
         highIndex = i;
      }
    }
      return highIndex;
  }

  int findLowValueIndex( )
  {
    int lowIndex = 0;
  
    for(int i = 1  ; i < yValues.length  ; i++ )
    {
      if ( yValues[i] < yValues [lowIndex] )
      {
         lowIndex = i;
      }
    }
      return lowIndex;
  }


  void drawHighMarker( )
  {
    for( int i = 0 ; i < yValues.length ; i++ )
    {
      if (yValues[i] == yValues[highValueIndex])
      {
        stroke(255);
        strokeWeight(1);
        line((i+1)*horizontalScale, yAxis - yValues[i], (i+1)*horizontalScale, yAxis - yValues[i] - 20);
        fill(#0DFF0E);
        triangle((i+1)*horizontalScale, yAxis - yValues[i] - 20, (i+1)*horizontalScale, yAxis - yValues[i] - 40, (i+1)*horizontalScale + 10, yAxis - yValues[i] - 30);
        break;
      }
    }
  }
  
  void drawLowMarker( )
  {
    for( int i = 0 ; i < yValues.length ; i++ )
    {
       if(yValues[i] == yValues[lowValueIndex])
       {
        stroke(255);
        strokeWeight(1);
        line((i+1)*horizontalScale, yAxis - yValues[i], (i+1)*horizontalScale, yAxis - yValues[i] - 20);
        fill(#FF0000);
        triangle((i+1)*horizontalScale, yAxis - yValues[i] - 20, (i+1)*horizontalScale, yAxis - yValues[i] - 40, (i+1)*horizontalScale + 10, yAxis - yValues[i] - 30);
        break;
       }  
    }
  }


  void drawBall( )
  {
     for( int i = 1 ; i < yValues.length-1 ; i++ )
     {
       if( yValues[i] == yValues[i+1])
       {
         stroke(255);
         strokeWeight(1);
         fill(#FFF700);
         ellipse((i+1)*horizontalScale+(horizontalScale/2), yAxis - yValues[i] - 5, 10, 10);
       }
     } 
  }


  int sumRise( )
  {
    int sum = 0;
    for(int i = 0  ; i < yValues.length-1  ; i++ )
    {
      if ( yValues[i] < yValues [i+1] )
      {
         sum = sum + (yValues[i+1] - yValues[i]);
      }
    }
      return sum;
  }


  int sumFall( )
  {
    int sum = 0;
    for(int i = 0  ; i < yValues.length-1  ; i++ )
    {
      if ( yValues[i] > yValues [i+1] )
      {
         sum = sum + (yValues[i] - yValues[i+1]);
      }
    }
      return sum;
  }