const skycolor          = 'LightBlue';          // sky color

const objectsize        = 300;                  // size of player   

const startRadius       = 1000;                 // distance from centre we start the camera at

const maxRadius         = startRadius * 10;     // maximum distance from camera we render things 

const skycolorObject    = new THREE.Color ( skycolor.toLowerCase() );                              

const speed = 50;

function World() 
{ 
    var player = new THREE.Mesh ( new THREE.BoxGeometry ( objectsize, objectsize, objectsize ) );
    
    //--------------Controls start-----------------
    
    var left = 37;
    var forward = 38;
    var right = 39;
    var backward = 40;
    
    var velocity = new THREE.Vector2(0,0);
    
    function updateControls()
    {
        if((ABWorld.camera.rotation.y >= -Math.PI / 4 && ABWorld.camera.rotation.y <= Math.PI / 4) &&
        (ABWorld.camera.rotation.x >= -Math.PI / 2 && ABWorld.camera.rotation.x <= 0) &&
        (ABWorld.camera.rotation.z >= -Math.PI / 4 && ABWorld.camera.rotation.z <= Math.PI / 4))
        {
            left       =   37;
            right      =   39;
            forward    =   38;
            backward   =   40;
        }
        else if((ABWorld.camera.rotation.y >= -Math.PI / 4 && ABWorld.camera.rotation.y <= Math.PI / 4) &&
        (ABWorld.camera.rotation.x >= -Math.PI && ABWorld.camera.rotation.x <= -Math.PI / 2) &&
        (ABWorld.camera.rotation.z >= 3 * Math.PI / 4 || ABWorld.camera.rotation.z <= -3 * Math.PI / 4))
        {
            left      =   39;
            right     =   37;
            forward    =   40;
            backward   =   38;
        }
        else if((ABWorld.camera.rotation.y >= 0 && ABWorld.camera.rotation.y <= Math.PI / 2) &&
        (ABWorld.camera.rotation.x >= -Math.PI && ABWorld.camera.rotation.x <= 0) &&
        (ABWorld.camera.rotation.z >= 0 && ABWorld.camera.rotation.z <= Math.PI))
        {
            left       =   38;
            right      =   40;
            forward   =   39;
            backward   =   37;
        }
        
        else if((ABWorld.camera.rotation.y >= -Math.PI / 2 && ABWorld.camera.rotation.y <= 0) &&
        (ABWorld.camera.rotation.x >= -Math.PI && ABWorld.camera.rotation.x <= 0) &&
        (ABWorld.camera.rotation.z >= - Math.PI && ABWorld.camera.rotation.z <= 0))
        {
            left       =   40;
            right      =   38;
            forward   =   37;
            backward   =   39;
        }
    }
    
    function handleKeyDown (event)
    {
      var code = event.keyCode;
      
      if (code == left)
      {  
          velocity.x = - speed;
      }   
      if (code == forward)
      {  
          velocity.y = - speed;
      }  
      if (code == right)
      {  
          velocity.x = speed;
      } 
      if (code == backward)
      {
          velocity.y = speed;
      }    
    
     }
     function handleKeyUp (event)
    {
      var code = event.keyCode;
      
      if (code == left && velocity.x != speed)
      {  
            velocity.x = 0;
      }   
      if (code == forward && velocity.y != speed)
      {  
            velocity.y = 0;
      }  
      if (code == right && velocity.x != - speed)
      {  
            velocity.x = 0;
      } 
      if (code == backward && velocity.y != - speed)
      {
            velocity.y = 0;
      }    
    
     } 
     
     //--------------Controls End-----------------

    this.newRun = function() 
    {
        // start a 3D scene: 
        ABWorld.init3d ( startRadius, maxRadius, skycolorObject ); 

        // add the player to the scene:
        ABWorld.scene.add(player);
        
        document.addEventListener('keydown', handleKeyDown);//add arrow key listener
        document.addEventListener('keyup', handleKeyUp);//add arrow key listener
    };
    
    this.nextStep = function()
    {
        updateControls();
        player.position.x += velocity.x;
        player.position.z += velocity.y;
    }

}