public class Lab3
{
  static void testLightCandles1()
  {
    Robot.load("candles1.txt");
    Robot.setDelay(0.05);
    Lab3.lightCandles();
  }
  
  static void testLightCandles2()
  {
    Robot.load("candles2.txt");
    Robot.setDelay(0.05);
    Lab3.lightCandles();
  }
    
   public static void lightCandles()
  {
    //insert instructions below

    lightOneCandle();
    lightOneCandle();
    lightOneCandle();
    lightOneCandle();
    lightOneCandle();
    lightOneCandle();
    lightOneCandle();
    lightOneCandle();
    lightOneCandle();
    lightOneCandle();

  }

  // Before: Robot is facing right, facing the bottom of the next candle.
  // After: Robot is facing right, facing the bottom of the next candle (if any)
  public static void lightOneCandle()
  {
    // Move robot up one level, still facing right
    Robot.turnLeft();
    Robot.move();
    Lab3.turnRight();
    // If the candle is one block high, then the front of robot should be clear
    if (Robot.frontIsClear())
    {
      // Move forward, light candle
      Robot.move();
      Robot.makeDark();
      Robot.move();
      Lab3.turnRight();
      Robot.move();
      Robot.turnLeft();
    }
    else
    {
      // Candle must be two blocks high so move up one more level
      Robot.turnLeft();
      Robot.move();
      Lab3.turnRight();
      Robot.move();
      Robot.makeDark();
      Robot.move();
      Lab3.turnRight();
      Robot.move();
      Robot.move();
      Robot.turnLeft();
    }

  }

  public static void turnRight()
  {
    Robot.turnLeft();
    Robot.turnLeft();
    Robot.turnLeft();
  }

  public static void backUp()
  {
    Robot.turnLeft();
    Robot.turnLeft();
    Robot.move();
    Robot.turnLeft();
    Robot.turnLeft();
  }

  
  //Run this method to test completeRoom on map room1.txt
  static void testCompleteRoom1()
  {
     Robot.load("room1.txt");
     Robot.setDelay(0.05);
     Lab3.completeRoom();
  }
  
  //Run this method to test completeRoom on map room2.txt
  static void testCompleteRoom2()
  {
    Robot.load("room2.txt");
    Robot.setDelay(0.05);
    Lab3.completeRoom();
  }
  
  //Complete this method.  You will need to write additional helper methods.
  public static void completeRoom()
  {
    //insert instructions below
    completeOneSide();
    completeOneSide();
    completeOneSide();
    completeOneSide();
  }

  public static void completeOneSide()
  {
    checkOneCell();
    Robot.move();
    checkOneCell();
    Robot.move();
    checkOneCell();
    Robot.move();
    checkOneCell();
    Robot.move();
    checkOneCell();
    Lab3.turnRight();
  }

  public static void checkOneCell()
  {
    Robot.turnLeft();
    if (Robot.frontIsClear())
    {
      Robot.move();
      if (!Robot.onDark())
      {
        Robot.makeDark();
      }
      Lab3.backUp();
    }
    Lab3.turnRight();
  }

  
  //Run this method to test swapAll on map swap1.txt
  static void testSwapAll1()
  {
    Robot.load("swap1.txt");
    Robot.setDelay(0.05);
    Lab3.swapAll();
  }
  
  //Run this method to test swapAll on map swap2.txt
  static void testSwapAll2()
  {
    Robot.load("swap2.txt");
    Robot.setDelay(0.05);
    Lab3.swapAll();
  }

  //Complete this method.  You will need to write additional helper methods.
  public static void swapAll()
  {
    //insert instructions below

    swapRow();
    swapRow();
    swapRow();
    swapRow();
    swapRow();
    swapRow();
    swapRow();
    swapRow();
    swapRow();
    swapRow();
  }

  public static void swapRow()
  {
    if (differentColors())
    {
      changeColors();
    }
    else
    {
      dontChangeColors();
    }
    if (Robot.frontIsClear())
    {
      Robot.move();
    }
  }

  public static boolean differentColors()
  {
    Robot.turnLeft();
    Robot.move();
    if (Robot.onDark())
    {
      Lab3.backUp();
      Lab3.backUp();
      if (Robot.onDark())
      {
        return false;
      }
      else
      {
        return true;
      }
    }
    else
    {
      Lab3.backUp();
      Lab3.backUp();
      if (!Robot.onDark())
      {
        return false;
      }
      else
      {
        return true;
      }
    }
  }

  public static void changeColors()
  {
    // This method is called only if the two colors are different.
    // Afterwards, restore robot to point up in middle column.
    Lab3.toggleColor();
    Robot.move();
    Robot.move();
    Lab3.toggleColor();
    Lab3.backUp();
    Lab3.turnRight();
  }

  public static void dontChangeColors()
  {
    // Restore robot to point up in middle column.
    Robot.move();
    Lab3.turnRight();
  }

  public static void toggleColor()
  {
    if (Robot.onDark())
    {
      Robot.makeLight();
    }
    else
    {
      Robot.makeDark();
    }
  }

}