var canvas;

var tooltipOpen=true;

var Width  = 960;

var Height = 400;

var delta = [0, 0];

var stage = [195, 250, 1150, 835]   //     bottom

var b2bod = [];

var worldAABB, world, iterations = 1, timeStep = 1 / 20;

var walls = [];

var wall_thickness = 20;

var wallsSetted = false;

var bodies, elements, text;

var createMode = false;

var destroyMode = false;

var emptyBottom = true;

var isFreezing = false;

var refLoop, refFileAttente;

var isMouseDown = false;

var isMouseDragging = false;

var isMouseDragging2 = true;

var mouseJoint;

var mouse = { x: 0, y: 0 };

var gravity = { x: 0, y: 0.3 };

var PI2 = Math.PI * 2;

var timeOfLastTouch = 0;

var tweetSilos = [];

init();

play();

function init() {

	worldAABB = new b2AABB();

	worldAABB.minVertex.Set( -200, -200 );

	worldAABB.maxVertex.Set( window.innerWidth + 200, window.innerHeight + 200 );

	world = new b2World( worldAABB, new b2Vec2( 0, 0 ), true );

	setWalls();

	reset();

}

function play() {

  if(!isFreezing)

    refLoop = setInterval( loop, 1000 / 40 );

 else

    clearInterval(refLoop);

  isFreezing = !isFreezing;

}

function reset() {

	if(bodies) {

		for (var i= 0; i < bodies.length; i++ ) {

			var body = bodies[ i ]

			canvas.removeChild( body.GetUserData().element );

			world.DestroyBody( body );

			body = null;

		}

	}

	bodies = [];

	elements = [];

}

function loop() {

	delta[0] += (0 - delta[0]) * .5;

	delta[1] += (0 - delta[1]) * .5;

	world.m_gravity.x = gravity.x * 350 + delta[0];

	world.m_gravity.y = gravity.y * 350 + delta[1];

	world.Step(timeStep, iterations);

	for (i = 0; i < bodies.length; i++) {

		var body = bodies[i];

		var element = elements[i];

		element.style.left = (body.m_position0.x - (element.width >> 1)) + 'px';

		element.style.top = (body.m_position0.y - (element.height >> 1)) + 'px';

	}

}

function createBox(world, x, y, width, height, fixed) {

  var c=document.createElement('canvas');

  var ctx=c.getContext("2d");

  ctx.fillStyle="#FF0000";

  ctx.fillRect(0,0,1500,750);

	if (typeof(fixed) == 'undefined') {

		fixed = true;

	}

	var boxSd = new b2BoxDef();

	if (!fixed) {

		boxSd.density = 1.0;

	}

	boxSd.extents.Set(width, height);

	var boxBd = new b2BodyDef();

	boxBd.AddShape(boxSd);

	boxBd.position.Set(x,y);

	return world.CreateBody(boxBd);

}

function getBodyAtMouse() {

	// Make a small box.

	var mousePVec = new b2Vec2();

	mousePVec.Set(mouse.x, mouse.y);

	var aabb = new b2AABB();

	aabb.minVertex.Set(mouse.x - 1, mouse.y - 1);

	aabb.maxVertex.Set(mouse.x + 1, mouse.y + 1);

	// Query the world for overlapping shapes.

	var k_maxCount = 10;

	var shapes = new Array();

	var count = world.Query(aabb, shapes, k_maxCount);

	var body = null;

	for (var i = 0; i < count; ++i) {

		if (shapes[i].m_body.IsStatic() == false) {

			if ( shapes[i].TestPoint(mousePVec) ) {

				body = shapes[i].m_body;

				break;

			}

		}

	}

	return body;

}

function setWalls() {

	if (wallsSetted) {

		world.DestroyBody(walls[0]);

		world.DestroyBody(walls[1]);

		world.DestroyBody(walls[2]);

		world.DestroyBody(walls[3]);

		walls[0] = null; 

		walls[1] = null;

		walls[2] = null;

		walls[3] = null;

	} else {

    walls[0] = createBox(world, 1880, 900, wall_thickness, 900); //  rightmost wall

    walls[1] = createBox(world, 1510, 600, wall_thickness, 300); //  wall 4 / 3

    walls[2] = createBox(world, 1130, 600, wall_thickness, 300); //  wall 3 / 2

    walls[3] = createBox(world, 760, 600, wall_thickness, 300); //   wall 2 / 1

    walls[4] = createBox(world, 390, 600, wall_thickness, 300); //   leftmostwall   

    walls[5] = createBox(world, 580, 600, 170, 10); //  4    

    walls[6] = createBox(world, 950, 750, 170, 10); //  3   

    walls[7] = createBox(world, 1320, 750, 170, 10); //  2   

    walls[8] = createBox(world, 1690, 600, 170, 10); //  1   

    setInterval(function() {

      // Check if div podiums are already loaded

      if($('#podium div').size() > 0) {

        $('#podium div').each( function(idx, panel) {

          var idxWall = 5+idx;

          var yWall = 920-$(this).height();

          world.DestroyBody(walls[idxWall]);

          walls[idxWall] = createBox(world, 580+370*idx, yWall, 170, 10);      

        });

      }

    }, 1000);

  }

}

function  createBallTweetForce(t) {

	var element = document.createElement( 'div' );

	element.width = 96;

	element.height = 96;	

	element.style.position = 'absolute';

	element.style.left = -200 + 'px';

	element.style.top = -200 + 'px';

	element.style.cursor = "default";

  element.style.hover = "red";

	element.id = t.id_str;

  var id = "tweet_"+bodies.length;

  var canvas = document.getElementById('canvas');

	canvas.appendChild(element);

	elements.push( element );

  BALL_SIZE = 150;

  var circle = document.createElement('canvas');

  circle.width = 96;

  circle.height = 96;

  var offset = (48 - BALL_SIZE)/2;

  var graphics = circle.getContext('2d');

  graphics.fillStyle = "white";

  graphics.beginPath();

  graphics.arc(BALL_SIZE* .25+10, BALL_SIZE* .25, BALL_SIZE* .25, 0, PI2, true); 

  graphics.closePath();

  graphics.fill();

  graphics.fillStyle = "#E2F0D6";

  graphics.beginPath();

  graphics.arc(BALL_SIZE * .5 +offset+24, BALL_SIZE * .5+offset+14, BALL_SIZE * .20, 0, PI2, true);

  graphics.closePath();

  graphics.fill();

  var img = new Image();

  img.src = t.profile_image_url;

  img.onload = function(){

    // Resize image

    var canvasCopy = document.createElement("canvas");

    var copyContext = canvasCopy.getContext("2d");

    canvasCopy.width = 96;

    canvasCopy.height = 96;

    copyContext.drawImage(img, 0, 0, 96, 96);

    var ptrn = graphics.createPattern(canvasCopy,'no-repeat');

    graphics.fillStyle = ptrn;

    graphics.fill(-5,0,150,150);

  }

	element.appendChild(circle);

	var circle = new b2CircleDef();

	circle.radius = BALL_SIZE/4+2 ;

	circle.density = 1;

	circle.friction = 0.3;

	circle.restitution = 0.3;

  var a, b, xpos, ypos;

  switch (t.cat) { 

    case 0: // 1

      a = 250;

      b = -100;

      xpos = 40;

      ypos = 250;

      break; 

    case 1: // 2

      a = 250;

      b = -150;

      xpos = 40;

      ypos = 70;      

      break; 

    case 2: // 3

      a = 290;

      b = -180;

      xpos = 40;

      ypos = 100;    

      break; 

    case 3: // 4

      a = 400;

      b = -180;

      xpos = 40;

      ypos = 150;      

      break;     

    default:

      a = 390;

      b = -180;

      xpos = 40;

      ypos = 70;      

      console.log("DEFAULT IMPULS PARAMS! Should not be there..");

      break; 

  }

  var b2body = new b2BodyDef();  

	b2body.AddShape(circle);

	b2body.userData = {element: element};

	b2body.position.Set( xpos, ypos);

  b2body.linearVelocity.Set(a, b);

  b2bod[t.id_str] = world.CreateBody(b2body);

  console.log("created " + t.id_str)

	bodies.push(b2bod[t.id_str]);	

	$("#"+t.id_str).mouseover(function() {

	    var _of = $(this).offset();

	    $(this).css({

	        "cursor": "pointer"

	    });

	    showTooltip(t, _of.left, _of.top);  

	}).mouseout(hideTooltip).click(function() {

        addTweetToSelection($("#btv-tooltip"));

	    $(this).fadeTo(100,.25, function() {

	        $(this).fadeTo(100,1);

	        showControlPanel();

	    })

	});

/*  $("#"+t.id_str).click(function() {

		if(!isMouseDragging) {

            fancyBoxTwitter(t.from_user, (t.candidats && t.candidats.length ? candidats[t.candidats[0]].couleur : '#666699'));

//      window.open("https://twitter.com/#!/"+t.from_user+"/status/"+t.id_str);

    }

  });   */

}