// options
var options = {};

options.mode = 'direct';


// old 
options.URL_BASE_DIRECT = 'http://search.twitter.com/search.json';
// TOOD gérer autho et passer à 1.1 !
//var options.URL_BASE_DIRECT = 'https://api.twitter.com/1.1/search/tweets.json';
options.URL_BASE_INDIRECT = 'https://appartsam.thiriot.net/twitterbattle/relay.php';

options.option_display_last=true;
options.option_filter_withdataonly=false;	// very coslty
options.option_show_images=true;
options.option_preload_images=false;
options.option_preload_avatars=false;
options.option_show_random_birds=true;
// max total node displayed in the space
options.maxnodes = 600;
// delay for refresh (s)
options.delay = 10000;
// delay for update after errors
options.delayRetryError = 1500;
// if true, use canvas instead of SVG
options.useCanvas = true;
options.color1 = "brown";
options.color2 = "gray";
options.colorDefault = "#DDD";
options.timeoutGetTweets = 2000;

var DEBUG = false;

// internal state of the IHM
var state = {};
var guiElements = {};

// state for auto display of tweets
state.stateTweetsAutoDisplay = {};
// timestamp ou le dernier tweet a été affiché
state.stateTweetsAutoDisplay.timestamp_lasttweet_displayed=undefined;

var dateServer = new Date("2025/12/06 04:52:33 +0100");
var dateLocal = new Date();
var diffHour = dateServer - dateLocal;


// true if everything is init
state.isInitialLoad = true;

guiElements.svg = undefined;
guiElements.canvas = undefined;


function displayMessageNotCompliant() { 

	$('div#backgroundpb').stop().fadeTo(1000,0.2).fadeTo(5000,0.7);

	$('#msgslot').html('<div class="errormessage">Sorry, your browser is too old for this experience. Please consider updating your browser or installing a more recent browser, for instance: <div id="showbrowsers"><a target="_blank" class="linkbrowser" id="linkbrowserfirefox" href="http://www.mozilla.org/products/firefox/">Mozilla Firefox</a><a target="_blank" class="linkbrowser" id="linkbrowserchrome" href="http://www.google.com/chrome">Google Chrome</a><a target="_blank" class="linkbrowser" id="linkbrowsersafari" href="http://www.apple.com/safari/">Apple Safari</a><a target="_blank" class="linkbrowser" id="linkbrowseropera" href="http://www.opera.com/">Opera</a><a target="_blank" class="linkbrowser" id="linkbrowseriexplore"  href="http://www.microsoft.com/windows/internet-explorer/">Microsoft Internet Explorer</a></div></div>');

}
// first detections 
if (!Modernizr.canvas || !Modernizr.canvastext) {
	displayMessageNotCompliant();
}

if (options.useCanvas) {
	guiElements.canvas = d3
	.select("#divanim").append("canvas")
	    .text(':-(')
	    .attr("width", window.innerWidth+"px")
	    .attr("height", window.innerHeight+"px")
	    .attr("id", "canvasanim");

	guiElements.canvasObj = document.getElementById("canvasanim");

	if (guiElements.canvasObj == null) { 
		displayMessageNotCompliant();
	}

	state.nodeDragged = undefined;
	state.nodeselected = undefined;
	state.nodeselectedtmp = undefined;
	state.nodeselectedAuto = undefined;
	guiElements.canvasObj.onmousedown = function(e) {
		if (state.nodeselected != undefined) {
			state.nodeselected.selected = false;
			state.nodeselected = undefined;
		}
		if (state.nodeselectedAuto != undefined) {
			state.nodeselectedAuto.selected = false;
			state.nodeselectedAuto = undefined;
		}
		state.nodeselectedtmp = undefined;
		var node = find(e.clientX, e.clientY);
		if (node !== undefined) {
			state.nodeDragged = node;
			//state.force.stop();
			state.nodeDragged.fixed = 2;	// = true
			node.selected = true;	
			state.nodeselected = node;
			state.nodeselectedtmp = node;
			displayTweet(node.data);	
		} 
		
	}
	
	guiElements.canvasObj.onmouseup = function(e) {
		if (state.nodeDragged) {
			state.nodeDragged.fixed = 0;	// = false		
			state.nodeDragged = undefined;	
			state.force.resume();
		}
		
	}
	
	var tweetDisplayed = undefined;
	
	guiElements.canvasObj.onmousemove = function(e) {
		if (state.nodeDragged !== undefined) {
		
			// we are moving somthing !
			state.nodeDragged.x = e.clientX;
			state.nodeDragged.y = e.clientY;
			state.nodeDragged.px = e.clientX;
			state.nodeDragged.py = e.clientY;
			state.force.resume();
			
		} else {
			if (state.nodeselected == undefined) {
				// don't care when we already know what to display !
				var n = find(e.clientX, e.clientY);
				if (n !== undefined) {	
					// found something
					if (tweetDisplayed != n.data) {				
						displayTweet(n.data);
						state.nodeselectedtmp = n;
						tweetDisplayed = n.data;
					}
				} else {
					if (tweetDisplayed !== undefined) {
						noMoreTweetDisplayed();
						//somethingDisplayed = false;
					};
				}
			}
		}
	}
	
} else {
	guiElements.svg = d3
	    .select("#divanim").append("guiElements.svg")
	    .attr("width", "100%")
	    .attr("height", "100%")
	    .attr("id", "guiElements.svganim");
}

//var msg = d3.select("#messages");

 
var tweetdisplay = {};
tweetdisplay.container = $('div#tweetdiv');
tweetdisplay.container.hide();
tweetdisplay.content = $('div#tweetcontent');
tweetdisplay.authoravatar = document.getElementById("tweetauthoravatar");
tweetdisplay.authorlinks = $('a.tweetlkuser');
tweetdisplay.authorname = $('a#tweetauthornamelk');
tweetdisplay.authorusername = $('a#tweetauthorusernamelk');
tweetdisplay.timestamp= $('div#tweettimestamp');
tweetdisplay.actions= $('div#tweetactions');
tweetdisplay.actionReplyLink = $('a#tweetlkreply');
tweetdisplay.actionRetweetLink = $('a#tweetlkretweet');
tweetdisplay.actionFavoriteLink = $('a#tweetlkfavorite');
//tweetdisplay.actionFollow = $('a#tweetlkfollow');
tweetdisplay.actionFollow = $('#tweetiffollow');
tweetdisplay.mediacontainer = $('div#tweetmedia');
tweetdisplay.birdimg = $('#birdimg');


guiElements.formparams = document.getElementById("guiElements.formparams");

state.rationodesize = window.innerHeight/72;

//var textdefault = "What does twitter cares about ?";

// init state for nodes 
nodes = [];
state.id2node = {};
//state.links = [];


state.force = d3.layout.force()
    //.state.links(state.links)
//    .gravity(0.9)
   //   .charge(-40)
    .gravity(0.02)
    .charge(-2)	// -2
    .nodes(nodes)
//      .linkDistance(0.1)
//      .state.linkstrength(0.1)
    .size([window.innerWidth, window.innerHeight])
    //.drag()
    .start();



function collide(node) {
  var r = node.radius +8,
      nx1 = node.x - r,
      nx2 = node.x + r,
      ny1 = node.y - r,
      ny2 = node.y + r;
  return function(quad, x1, y1, x2, y2) {
    if (quad.point && (quad.point !== node)) {
      var x = node.x - quad.point.x,
          y = node.y - quad.point.y,
          l = Math.sqrt(x * x + y * y),
          r = node.radius + quad.point.radius+4;
      if (l < r) {
        l = (l - r) / l * .5;
        node.x -= x *= l;
        node.y -= y *= l;
        quad.point.x += x;
        quad.point.y += y;
      }
    }
    return x1 > nx2
        || x2 < nx1
        || y1 > ny2
        || y2 < ny1;
  };
}

var COLOR_SELECTED = "red";
var selectionPatternBegin = 0;

if (options.useCanvas) {
	
	
	var context = guiElements.canvas.node().getContext("2d");


	var pim2 = 2*Math.PI;
	d3.timer(function() {
	  context.clearRect(0, 0, context.canvas.width, context.canvas.height);


	  context.lineWidth=3;

	  nodes.forEach(function(d) {

            context.fillStyle = d.color;
	   
	    context.beginPath();
	    context.arc(d.x, d.y, d.radius, 0, pim2);
	    // TODO manage the case with two colors.
	    /*if (d.selected) {
		context.stroke();
	    }*/
	    context.fill();

	    
	    if (d.selected) {
		 if (d.color == options.color1) { context.strokeStyle=options.color2; } else { context.strokeStyle=options.color1 };

	    	var totalStep = 14;
		var step = pim2/totalStep;
		var currentBegin = selectionPatternBegin;
		for (i=0; i<totalStep; i++) {
			context.beginPath();
			context.arc(d.x, d.y, d.radius+4, currentBegin, currentBegin+step);	
	    		context.stroke();
			currentBegin += step*2;
		}
		selectionPatternBegin = selectionPatternBegin + 0.05;
	 
	    }
		
	  });

	});

} 

/* TODO find the nodes for a location; required for drag/drop and mouse hover ! */
function find(x, y) {

  if (q === undefined)
     return undefined;

  var thepoint = [];

  q.visit(function(node, x1, y1, x2, y2) {
    var p = node.point;
    if (p) {
	    var a = (x - p.x);
	    var b = (y - p.y);
	    
	    var dist = Math.sqrt(a*a + b*b);

	    if (dist <= p.radius) {
		thepoint.push(p);
		return true;
	    } 
    }
    return false;
    // if we return true, then the exploration stops
    //return x1 >= x || y1 >= y || x2 < x || y2 < y;
  });
  return thepoint[0];
}

// will store the last quadtree !
var q = undefined;
state.force.on("tick", function() {

	  var i = 0,
	      n = nodes.length;

	q = d3.geom.quadtree(nodes);
	// collisions
	  while (++i < n) {
	    q.visit(collide(nodes[i]));
	  }

/*
      guiElements.svg.selectAll("line.link")
        .attr("x1", function(d) { return d.source.x; })
        .attr("y1", function(d) { return d.source.y; })
        .attr("x2", function(d) { return d.target.x; })
        .attr("y2", function(d) { return d.target.y; });
*/
	// update attributes

	if (!options.useCanvas) {
	      guiElements.svg.selectAll(".node")
		.attr("cx", function(d) { return d.x; })
		.attr("cy", function(d) { return d.y; });
	}
});



function clear() {
   noMoreTweetDisplayed();
   nodes.length=0;
   //state.links.length=0;
   state.id2node = {};

if (!options.useCanvas) {
   guiElements.svg.selectAll("circle").remove();
}
   state.stateTweetsAutoDisplay.timestamp_lasttweet_displayed = undefined;
   state.nodeselected = undefined;
   state.nodeselectedAuto = undefined;
}

function restart() {

  state.force.stop();

if (!options.useCanvas) {
/*
  guiElements.svg.selectAll("line.link")
      .data(state.links)
       .enter().insert("guiElements.svg:line", "circle.node")
      .attr("class", "link")
      .attr("x1", function(d) { return d.source.x; })
      .attr("y1", function(d) { return d.source.y; })
      .attr("x2", function(d) { return d.target.x; })
      .attr("y2", function(d) { return d.target.y; });
*/


  var node = guiElements.svg.selectAll(".node")
      .data(nodes);

  node
      .enter()
      .append("circle")
      .attr("class", "node")
      .attr("id", function(d) { return "A"+d.name; })
      .style("fill", function(d) { return d.color; })
      .attr("cx", function(d) { return d.x; })
      .attr("cy", function(d) { return d.y; })
      .attr("r", function(d) { return d.radius; })
      .on("mouseover", function(d,i) { 
		displayTweet(d.data);
	})
      .on("mouseout", function(d,i) {
		noMoreTweetDisplayed();
	})
      .call(state.force.drag);

//   node.exit().remove();


} 
      
  state.force.start();
}
function noMoreTweetDisplayed() {
	tweetdisplay.container.stop().fadeOut(900);
	if (state.nodeselected != undefined) {
		state.nodeselected.selected = false;
		state.nodeselected = undefined;
	} 
	if (state.nodeselectedAuto != undefined) {
		state.nodeselectedAuto.selected = false;
		state.nodeselectedAuto = undefined;
	} 
	state.nodeselectedtmp = undefined;
}
var monthNames = new Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
function toTwitterDate(time){
	var date = new Date(time),
		diff = (((new Date()).getTime() - date.getTime()) / 1000),
		day_diff = Math.floor(diff / 86400);
 
	if ( isNaN(day_diff) || day_diff < 0 || day_diff >= 31 )
		return;
 
	return day_diff == 0 && (
			diff < 10 && "just now" ||			
			diff < 60 && Math.floor(diff)+"s" ||
			diff < 3600 && Math.floor( diff / 60 ) + "m" ||
			diff < 86400 && Math.floor( diff / 3600 ) + "h") ||
		day_diff <= 365 && date.getDay()+" "+monthNames[date.getMonth()] ||
		date.getDay()+" "+monthNames[date.getMonth()]+" "+date.getYear();
}

function escapeHTML(text) {
    return $("<div/"+">").text(text).html();
}
// https://gist.github.com/442463
function linkify_entities(tweet) {
    if (!(tweet.entities)) {
        return escapeHTML(tweet.text)
    }
    
    // This is very naive, should find a better way to parse this
    var index_map = {}
    
    $.each(tweet.entities.urls, function(i,entry) {
        index_map[entry.indices[0]] = [entry.indices[1], function(text) {return "<a class='tweeturllk' target='_blank' href='"+escapeHTML(entry.url)+"'>"+escapeHTML(entry.display_url)+"</a>"}]
    })
    
    $.each(tweet.entities.hashtags, function(i,entry) {
        index_map[entry.indices[0]] = [entry.indices[1], function(text) {return "<a class='tweethashtaglk' target='_blank' href='http://twitter.com/search?q="+escape("#"+entry.text)+"'>"+escapeHTML(text)+"</a>"}]
    })
    
    $.each(tweet.entities.user_mentions, function(i,entry) {
        index_map[entry.indices[0]] = [entry.indices[1], function(text) {return "<a class='tweetuserlk' target='_blank' title='"+escapeHTML(entry.name)+"' href='http://twitter.com/"+escapeHTML(entry.screen_name)+"'>"+escapeHTML(text)+"</a>"}]
    })

    if (tweet.entities.media !== undefined) {
	    $.each(tweet.entities.media, function(i,entry) {
		index_map[entry.indices[0]] = [entry.indices[1], function(text) {return "<a class='tweeturllk' target='_blank' href='"+escapeHTML(entry.url)+"'>"+escapeHTML(entry.display_url)+"</a>"}]
	    })
    }
    var result = ""
    var last_i = 0
    var i = 0
    
    // iterate through the string looking for matches in the index_map
    for (i=0; i < tweet.text.length; ++i) {
        var ind = index_map[i]
        if (ind) {
            var end = ind[0]
            var func = ind[1]
            if (i > last_i) {
                result += escapeHTML(tweet.text.substring(last_i, i))
            }
            result += func(tweet.text.substring(i, end))
            i = end - 1
            last_i = end
        }
    }
    
    if (i > last_i) {
        result += escapeHTML(tweet.text.substring(last_i, i))
    }
    
    return result
}

var birdsPossible = {

	'randomBird1':120,
	'randomBird2':65,
	'randomBird3':100,
	'randomBird4':78,
	'randomBird5':97,
	'randomBird6':103,
	'randomBird7':120,
	'randomBird8':100,
	'randomBird9':100,
	'randomBird10':110,
	'randomBird11':110,	
	'_max':10
};
function drawRandomBird() {
	
	if (Math.random() <= 0.95) {
		tweetdisplay.birdimg.hide();
		return;
	}
//	return positionnodesPossible.verycentercolor;
	var idx = Math.round(Math.random()*(birdsPossible._max));
	var i = 0;
	for (var key in birdsPossible) {
		if (i==idx) {
			tweetdisplay.birdimg.attr("src", "img/"+key).css("top","-"+birdsPossible[key]+"px");
			tweetdisplay.birdimg.show();
			return;
		}
		i++;
	}
	if (DEBUG) {console.log("?????");}
	return undefined;
}
function displayTweet(data) {

  if (DEBUG > 1) {
	console.log("displaying tweet: ");
	console.log(data);
  } 

  var pattern, 
	txt=linkify_entities(data);


  // color our tags
  for(var i in state.tag2color) {
	pattern = new RegExp("("+i+")", 'gi');
	txt = txt.replace(pattern,'<span style="font-weight: bold; color:'+state.tag2color[i]+'">$1</span>');
  }

//  msg.html(data.from_user_name+": "+txt+"  ("+data.created_at+")");

   var mediacontainercontent = "";
   if (options.option_show_images && (data.entities.media != undefined)) {
	   $.each(data.entities.media, function(i,entry) {
		if (entry.type == "photo") {
			var size = undefined;
			if (entry.sizes.thumb != undefined) { size = "thumb"; } 
			else if (entry.sizes.small != undefined) { size = "small"; }
			else if (entry.sizes.orig != undefined) { size = "orig"; }
			else if (entry.sizes.large != undefined) { size = "large"; }
			if (size != "thumb")
				console.log("size: "+size);
			if (size != undefined)
				mediacontainercontent+= "<a target='_blank' href='"+entry.expanded_url+"' ><img class='tweetmedia' src=\'"+entry.media_url+":"+size+"\'/"+" width='150' height='150'></a>";
		}       
	   });

   }
	
// TOTO
  tweetdisplay.content.html(txt);
  tweetdisplay.authoravatar.src = "img/twitter-egg.jpg"; // first call; so if we are unable to load the true one, this will be obious
  tweetdisplay.authoravatar.src = data.profile_image_url; 
  tweetdisplay.authorlinks.attr("href", "https://twitter.com/intent/user?user_id="+data.from_user_id_str);
  tweetdisplay.authorname.html(data.from_user_name);
  tweetdisplay.authorusername.html("@"+data.from_user); 
  tweetdisplay.timestamp.html("<a target='_blank' href=\"https://twitter.com/"+data.from_user_name+"/statuses/"+data.id_str+"\">"+toTwitterDate(data.created_at)+"</a>");
  tweetdisplay.actionReplyLink.attr("href", "https://twitter.com/intent/tweet?in_reply_to="+data.id_str);
  tweetdisplay.actionRetweetLink.attr("href", "https://twitter.com/intent/retweet?tweet_id="+data.id_str);
  tweetdisplay.actionFavoriteLink.attr("href", "https://twitter.com/intent/favorite?tweet_id="+data.id_str);
  //tweetdisplay.actionFollow.attr("href", "https://twitter.com/"+data.from_user_name);
 // twttr.widgets.load();
  tweetdisplay.actionFollow.attr("src", "//platform.twitter.com/widgets/follow_button.html?show_count=false&lang=en&show_screen_name=false&screen_name="+data.from_user);
  tweetdisplay.mediacontainer.html(mediacontainercontent);
  //tweetdisplay.birdimg.attr("src", "img/randomBird1.png").css("top","-50px");
  if (options.option_show_random_birds) { drawRandomBird(); }
  showTweetDisplay();
  
// TOTO

 //  $('#messages').stop().fadeTo(100,1.0);

}

function showTweetDisplay() {
 	tweetdisplay.container.stop().fadeTo(100,1.0);
}


var positionnodesPossible = { 
	'randomp':0,
	'verycenter':1,
	'lineh':2,
	'linexy':3,
	'lineyx':4,
	'bottom':5,
	'bottomAndRight':6,
	'right':7,
	'left':8,
	'circle':9,
	'colorsBottom':10,
	'colorsDiag':11,
	'circleColor':12,
	'circleoptionsColor2':13,
	'linexyColor':14,
	'linehColor':15,
	'lineyxColor':16,
	'bottomColor':17,
	'verycentercolor':18,
	'_max':18
};
//Object.freeze(positionnodesPossible);
function getRandomNodesPosition() {
	
//	return positionnodesPossible.verycentercolor;
	var idx = Math.round(Math.random()*(positionnodesPossible._max));
	var i = 0;
	for (var key in positionnodesPossible) {
		if (i==idx) {
			return positionnodesPossible[key]; 
		}
		i++;
	}
	if (DEBUG) {console.log("?????");}
	return undefined;
}

var positionnodes = positionnodesPossible.randomp;

/**
* preload images
**/
function preload(imgSrc) {
    if (DEBUG==2) { console.log("preloading: "+imgSrc); }
    (new Image()).src = imgSrc;
    
}



function addNode(i, withdata) {

	var nodecolor = computeNodeColor(withdata);


	var xinit,yinit; 
	var rand = Math.random();
	var rand2 = Math.random();
	
	switch(positionnodes)
	{	// select node position according to main position scheme
	case positionnodesPossible.verycenter:
	  xinit = Math.floor((window.innerWidth)/2+(rand-0.5)*30);
	  yinit = Math.floor((window.innerHeight)/2+(rand2-0.5)*30);
	  break;
	case positionnodesPossible.verycentercolor:
	  if (nodecolor == options.color1) {
		xinit = Math.floor((window.innerWidth)/2+20+(rand)*15);
		yinit = Math.floor((window.innerHeight)/2+20+(rand2)*15);
	  } else if (nodecolor == options.color2) {
		xinit = Math.floor((window.innerWidth)/2-20-(rand)*15);
		yinit = Math.floor((window.innerHeight)/2-20-(rand2)*15);
	  } else {
		xinit = Math.floor((window.innerWidth)/2+(rand-0.5)*30);
		yinit = Math.floor((window.innerHeight)/2+(rand2-0.5)*30);
	  }
	  break;
	case positionnodesPossible.lineh:
	  xinit = Math.floor(rand*(window.innerWidth));
	  yinit = Math.floor((window.innerHeight)/2+(rand2-0.5)*5);
	  break;
  	case positionnodesPossible.linehColor:
	  xinit = Math.floor(rand*(window.innerWidth/2));
	  yinit = Math.floor((window.innerHeight)/2+(rand2-0.5)*5);
	  if (nodecolor == options.color1) {
	  } else if (nodecolor == options.color2) {
		xinit = xinit+window.innerWidth/2;
	  } else {
		xinit = xinit+window.innerWidth/4;
	  }
	  break;
	case positionnodesPossible.linexy:
	  xinit = Math.floor(rand*(window.innerWidth)+(rand2-0.5)*5);
	  yinit = Math.floor(rand*(window.innerHeight)+(rand2-0.5)*5);
	  break;
	case positionnodesPossible.linexyColor:	
	  if (nodecolor == options.color1) {
		rand = rand / 2;
	  } else if (nodecolor == options.color2) {
		rand = 0.5 + rand/2;
	  } 
	  xinit = Math.floor(rand*(window.innerWidth/2)+(rand2-0.5)*5);
	  yinit = Math.floor(rand*(window.innerHeight/2)+(rand2-0.5)*5);
	  break;
	case positionnodesPossible.lineyx:
	  xinit = Math.floor(rand*(window.innerWidth)+(rand2-0.5)*5);
	  yinit = Math.floor((1-rand)*(window.innerHeight)+(rand2-0.5)*5);
	  break;
	case positionnodesPossible.lineyxColor:
	  if (nodecolor == options.color1) {
	  	rand = rand/2;
	  } else if (nodecolor == options.color2) {
	  	rand = rand/2+0.5;
	  } 
          xinit = Math.floor(rand*(window.innerWidth)+(rand2-0.5)*5);
	  yinit = Math.floor((1-rand)*(window.innerHeight)+(rand2-0.5)*5);
	  break;
	case positionnodesPossible.bottom:
	  xinit = Math.floor(rand*(window.innerWidth));
	  yinit = Math.floor(window.innerHeight*0.8+(rand2-0.5)*5);
	  break;
	case positionnodesPossible.bottomColor:
	  if (nodecolor == options.color1) {
	  	rand = rand/2;
	  } else if (nodecolor == options.color2) {
	  	rand = rand/2+0.5;
	  } 
	  xinit = Math.floor(rand*(window.innerWidth));
	  yinit = Math.floor(window.innerHeight*0.8+(rand2-0.5)*5);
	  break;
	case positionnodesPossible.bottombottomAndRight:
	  if (Math.random() <= 0.5) {
		xinit = Math.floor(rand*(window.innerWidth));
		yinit = Math.floor(window.innerHeight*0.8+(rand2-0.5)*5);
	  } else {
		xinit = Math.floor(0.8*(window.innerWidth)+(rand2-0.5)*5);
	  	yinit = Math.floor(rand*window.innerHeight);
          }
	  break;
	case positionnodesPossible.right:
	  xinit = Math.floor(0.8*(window.innerWidth)+(rand2-0.5)*5);
	  yinit = Math.floor(rand*window.innerHeight);
	  break;
	case positionnodesPossible.left:
	  xinit = Math.floor(0.15*(window.innerWidth)+(rand2-0.5)*5);
	  yinit = Math.floor(rand*window.innerHeight);
	  break;
	case positionnodesPossible.circle:
	  var radius = window.innerHeight/3 + (rand2-0.5)*5;
	  var angle = rand*Math.PI*2;
	  xinit = Math.floor(Math.cos(angle)*radius + window.innerWidth/2);
	  yinit = Math.floor(Math.sin(angle)*radius + window.innerHeight/2);
	  break;
	case positionnodesPossible.circleColor:
	  var radius;
	  var angle = rand*Math.PI*2;
	  if (nodecolor == options.color2) {
		radius = window.innerHeight/5 + (rand2-0.5)*5;	  
	  } else if (nodecolor == options.color1) {
		radius = window.innerHeight/2 + (rand2-0.5)*5;
	  } else {
		radius = window.innerHeight/4 + (rand2-0.5)*5;
	  }
	  xinit = Math.floor(Math.cos(angle)*radius + window.innerWidth/2);
	  yinit = Math.floor(Math.sin(angle)*radius + window.innerHeight/2);
	  break;
	case positionnodesPossible.circlecolor2:
	  var radius = window.innerHeight/2 + (rand2-0.5)*5;
	  var angle;
	  if (nodecolor == options.color1) {
		angle = Math.PI*2/3+rand*Math.PI;	  
	  } else if (nodecolor == options.color2) {
		angle = Math.PI*2/3-rand*Math.PI;
	  } else {
		angle = rand*Math.PI*2;
	  }
	  xinit = Math.floor(Math.cos(angle)*radius + window.innerWidth/2);
	  yinit = Math.floor(Math.sin(angle)*radius + window.innerHeight/2);
	  break;

	case positionnodesPossible.colorsBottom:
	  if (nodecolor == options.color1) {
		xinit = Math.floor(window.innerWidth/4+(rand-0.5)*20);	  
	  } else if (nodecolor == options.color2) {
		xinit = Math.floor(window.innerWidth*3/4+(rand-0.5)*20);
	  } else {
		xinit = Math.floor(window.innerWidth/2+(rand-0.5)*20);
	  }
	  yinit = Math.floor(window.innerHeight*3/4+(rand2-0.5)*5);	
	  break;
	case positionnodesPossible.colorsDiag:
	  if (nodecolor == options.color1) {
		xinit = Math.floor(window.innerWidth/4+(rand-0.5)*20);	  
	  	yinit = Math.floor(window.innerHeight*3/4+(rand2-0.5)*5);	
	  } else if (nodecolor == options.color2) {
		xinit = Math.floor(window.innerWidth*3/4+(rand-0.5)*20);
	  	yinit = Math.floor(window.innerHeight/4+(rand2-0.5)*5);	
	  } else {
		xinit = Math.floor(window.innerWidth/2+(rand-0.5)*20);
		yinit = Math.floor(window.innerHeight/2+(rand2-0.5)*5);	
	  }
	  break;
	case positionnodesPossible.randomp:
	default:
	  var random3 = Math.random();		
	  var random4 = Math.random();
	  if (random3 <= 0.5) {
		  xinit = (random4 <= 0.5 ? Math.floor(rand*(window.innerWidth/3)) : Math.floor((rand+2)*(window.innerWidth/3)));
		  yinit = Math.floor(rand2*window.innerHeight);		
	  } else {
		  xinit = Math.floor(rand*window.innerWidth);
		  yinit = (random4 <= 0.3 ? Math.floor(rand2*(window.innerHeight/4)) : Math.floor((rand2+3)*(window.innerHeight/4)));		
	  }
	  break;
	}
//	  console.log("x:"+xinit+",y:"+yinit);
	
	// remove node(s) if required
	if (nodes.length > options.maxnodes) {
		removeNodes(nodes.length-options.maxnodes);
	}
	
	// add the node
	var novelNode = nodes.push({x: xinit, y: yinit, name:i, data: withdata, radius: computeNodeRadius(withdata), color:nodecolor });
	var thenode = nodes[novelNode-1]; 
        state.id2node[''+i]=thenode;
	restart();

	// display ? 
	if (options.option_display_last && (state.nodeselected == undefined) && (state.nodeselectedtmp == undefined)  && (state.stateTweetsAutoDisplay.timestamp_lasttweet_displayed == undefined || (Date.now() - state.stateTweetsAutoDisplay.timestamp_lasttweet_displayed) > 2500)) {

		state.stateTweetsAutoDisplay.timestamp_lasttweet_displayed = Date.now();
		if (state.nodeselectedAuto !== undefined) {
			state.nodeselectedAuto.selected = false;
		}
		displayTweet(withdata); 

		thenode.selected = true;
		state.nodeselectedAuto = thenode;
		
	}

 
	// preload data	
	if (options.option_preload_avatars) {
		preload(withdata.profile_image_url);
	};
	if (options.option_preload_images && withdata.entities.media != undefined) {
		$.each(withdata.entities.media, function(i,entry) {
			var size = undefined;
			if (entry.sizes.thumb != undefined) { size = "thumb"; }
			else if (entry.sizes.small != undefined) { size = "small"; } 
			else if (entry.sizes.orig != undefined) { size = "orig" };  
			if (size != undefined)
				preload(entry.media_url+":"+size);
		  }); 
	}

	
}


function computeNodeRadius(withdata) {
	
	return Math.round(Math.min(state.rationodesize,(4+withdata.text.length/(state.rationodesize+1))));
}
function computeNodeColor(withdata) {
	var len = 0;
	// TODO allow mixed colors (with stroke)
	// try to determine the fill color from hashtags
	if (withdata.entities.hashtags !== undefined) {
		len = withdata.entities.hashtags.length;
		for(var i=0; i<len; i++) {
			var color = state.tag2color["#"+withdata.entities.hashtags[i].text.toLowerCase()];
			if (color !== undefined) {
				return color;
			}			
		}
	}	
	// try to determine the fill color from user mentions
	if (withdata.entities.user_mentions !== undefined) {
		len = withdata.entities.user_mentions.length;
		for(var i=0; i<len; i++) {
			var color = state.tag2color["@"+withdata.entities.user_mentions[i].screen_name.toLowerCase()];
			if (color !== undefined) {
				return color;
			}			
		}
	}
	// else, try to detect fill color from words
	{
		var txtl = withdata.text.toLowerCase();
		for(var w in state.tag2color) {
			if (txtl.indexOf(w)!=-1) {
				return state.tag2color[w]; 
			}				
		}
	}		
	// last possible result: a light gray
	return options.colorDefault;
}
/**
* remove N older nodes from the display
*/
function removeNodes(nb) {
	if (nb <= nodes.length) {
		// remove data
		var removedNodes = nodes.splice(0,nb);
		// remove visual representation
		if (!options.useCanvas) {
			for (i=0; i<removedNodes.length; i++) {
				  guiElements.svg.selectAll("#A"+removedNodes[i].name).remove();
			}
		}
	}
}
function addNodeIfNecessary(i, withdata) {

	if( state.id2node[i] === undefined ) {
	    addNode(i,withdata);	
	}	
}
/*
function addLink(i,j) {

        novelLink = state.links.push({source: state.id2node[i], target: state.id2node[j], weight: 1});
	restart();
}
*/
//restart();
//

// =================== twitter

var lastRetrieved = 1;	// the id of the alst 

// the URL for share (to come back on the same state)
state.currentUrlLink = "";

state.tag2color = {};

var searched = '';

var url = ''; // urlbase + '?callback=?&q='+searched+'&since_id='+lastRetrieved+"&rpp=100&result_type=recent&include_rts=1&include_entities=1";
var updateHolder = undefined;
// stores all the refresh holders (for displaying nodes in options.delayed mode)
var holders = [];

// decode URL params
var urlParams = {};
(function () {
    var match,
        pl     = /\+/g,  // Regex for replacing addition symbol with a space
        search = /([^&=]+)=?([^&]*)/g,
        decode = function (s) { return decodeURIComponent(s.replace(pl, " ")); },
        query  = window.location.search.substring(1);

    while (match = search.exec(query))
       urlParams[decode(match[1])] = decode(match[2]);
})();

function cancelNextRetrieval() {
	if (updateHolder !== undefined) {
		clearTimeout(updateHolder);
	}
}
function stopLoadUpdate() {
	// cancel the next retrieving of tweets
	cancelNextRetrieval();
	// cancel pending adds of nodes
	var len = holders.length;
	for (var i=0; i<len; i++) {
		clearTimeout(holders[i]);
	}
	holders.length = 0;
	// don't show the loading indicator any more	
	hideUpdate();
}
function maybeLoad(fieldid,color) {
	var content = guiElements.formparams.elements[fieldid].value;
	if (content.length > 0) {
		state.tag2color[content.toLowerCase()] = color;
	}
}
function changedParamsManu() {


	// mmm, unselect the preset, thanks
	$("#preset").val([]);

	changedParams();

}

function changedParams() {
	// cancel previous tweet updates
	stopLoadUpdate();

	state.isInitialLoad = true;

	// update the map of tag / color
	state.tag2color = {};
	maybeLoad("aA",options.color1);	maybeLoad("aB",options.color1); maybeLoad("aC",options.color1);
	maybeLoad("bA",options.color2);	maybeLoad("bB",options.color2); maybeLoad("bC",options.color2);

	// update the "searched" part of the url
	searched = '';
	state.currentUrlLink = '';
	state.currentUrlLinkLeft = '';
	state.currentUrlLinkRight = '';
	for(var i in state.tag2color) {
		if (searched.length > 0) {
			searched = searched + " OR ";
		} 
		if (i.indexOf(" ")!=-1) {
			// if space, enclose into quotes
			searched = searched + "\"" + i + "\"";
		} else {
			searched = searched + i;
		}
		if (state.tag2color[i]==options.color1) {
			if (state.currentUrlLinkLeft.length > 0) {
				state.currentUrlLinkLeft = state.currentUrlLinkLeft + ",";
			}
			state.currentUrlLinkLeft = state.currentUrlLinkLeft + i;
		} else {
			if (state.currentUrlLinkRight.length > 0) {
				state.currentUrlLinkRight = state.currentUrlLinkRight + ",";
			}
			state.currentUrlLinkRight = state.currentUrlLinkRight + i;
		
		}
	}
	state.currentUrlLink = window.location.protocol+"//"+window.location.host+window.location.pathname+"?query="+encodeURIComponent(state.currentUrlLinkLeft + "/" + state.currentUrlLinkRight);

	
	// TODO update !
//	addthis_share["url"] = state.currentUrlLink;
	if (addthis !== undefined) {	// if the script is not loaded, still continue our work
		addthis.update('share','url', state.currentUrlLink);
	}

	searched =  encodeURIComponent(searched);
	
	lastRetrieved = 1;

	// clear the current image which is no more relevant
	clear();
	restart();
	
	// restart the update of tweets
	updateTweets();

	
}


var retrieved;

/*
function displayMessage(idmessage) {

	var msg = '';
	switch (idmessage) 
	{ 
		case 'loading': 
			msg = "contacting the twitter server..."; 
			break; 
		case 'indirect': 
			msg = "Twitter is not accessible from your network, attempting to contact our relay..."; 
			break; 
		case 'full': 
			msg = "Your screen is full, update stopped."; 
			break; 
		case 'noupdate': 
			msg = "Waiting for server info..."; 
			break; 
	
		default: 
			return;
			break; 
	}


	$('#msgcentral').stop().html(msg).show();
//fadeTo(2000,0.8)
}
*/
function clearMessage() {
	$('#msgcentral').stop().hide().html("");
}

function presedChoosed() {
	loadFromShort(guiElements.formparams.elements["preset"].value);
}
function randompreset() {

	var oldvalue = guiElements.formparams.elements["preset"].value;
	while (guiElements.formparams.elements["preset"].value == oldvalue) {	// avoid to randomly select the same option
		guiElements.formparams.elements["preset"].options[Math.floor(guiElements.formparams.elements["preset"].options.length*Math.random())].selected = "1";
	}
	presedChoosed();
}
function loadFromShort(txt) {

	var one = txt.split("/");
	if (one.length != 2) {
		return;	// error !
	}
	var as = one[0].split(",");
	var bs = one[1].split(",");

	guiElements.formparams.elements["aA"].value = (as[0] === undefined ? "": as[0]);
	guiElements.formparams.elements["aB"].value = (as[1] === undefined ? "": as[1]);
	guiElements.formparams.elements["aC"].value = (as[2] === undefined ? "": as[2]);

	guiElements.formparams.elements["bA"].value = (bs[0] === undefined ? "": bs[0]);
	guiElements.formparams.elements["bB"].value = (bs[1] === undefined ? "": bs[1]);
	guiElements.formparams.elements["bC"].value = (bs[2] === undefined ? "": bs[2]);


	changedParams();

}
function planTweeterUpdate(delay) {
	if (updateHolder !== undefined) {
		clearTimeout(updateHolder);
	}
	if (DEBUG) {
		console.log("planning next tweeter update for "+delay);
	}
	updateHolder = setTimeout('updateTweets()', delay);
}
function filterDisplayResult(item) {
	var len = 0;
	// basic filter: remove the tweets with too many hashtags (that's a kind of spam)
	if (item.entities.hashtags !== undefined) {
		len1 = item.entities.hashtags.length;
		if (len1 >= 7) {
			return false;
		}
		len += len1;
	}
	// basic filter: remove the tweets with too many user mentions
	if (item.entities.user_mentions !== undefined) {
		len2 = item.entities.user_mentions.length;
		if (len2 >= 5) {
			return false;
		}
		len += len2;	
	}
	// total filter: too many references = spam
	if (len >= 8) {
		return false;
	}
	// color: if we are unable to color them, hide them
	if (computeNodeColor(item) === options.colorDefault) {
		return false;
	}
	
	return true;
}
function hideUpdate() {
		$("#wait").hide();	

}
var lastRetrievedNext;
function processResults(data) {
                 
		if (data == null || data.error !== undefined) {
			if (DEBUG) { console.log("error detected: "+(data != null ? data.error:"(unknown)")+"; will try to refresh"); }

			planTweeterUpdate(options.delayRetryError);
			displayMessage('noupdate');
			
			return;
		}
		//clearMessage();
		hideUpdate();

		retrieved = data;
		lastRetrievedNext = data.max_id_str;
  
		var date, diff, tmpholderl
		var now = (new Date()).getTime();

		// first nodes added using one random method
		positionnodes = getRandomNodesPosition();
		
		$.each(data.results, function (i, item) {

			// filter spams
			if (!filterDisplayResult(item)) {
				return;
			}
			if (options.option_filter_withdataonly) {
				if (item.entities.media == undefined || item.entities.media.length == 0)
					return;
			}
			date = (new Date(item.created_at)).getTime();  
			diff = (date - diffHour - now + options.delay + 20000);
			if (DEBUG>1) { console.log("diffHour:"+diffHour+",date:"+date+",now:"+now+"; "+diff); }
			
			if (diff < 50) {
				// mmm... too old, display it right now

				addNodeIfNecessary(item.id, item);	
			} else {
				// this is a recent tweet; replay how it appears !
				if (DEBUG>1) { console.log("options.delayed by "+diff); };
				var diff2 =  diff;
				tmpholder = setTimeout(function () {
					if (DEBUG>1) { console.log("display after waiting "+diff2);}
					addNodeIfNecessary(item.id, item);

					}, diff+Math.floor(500*Math.random())
				);	
				holders.push(tmpholder);
			}
			

		});

		// later the nodes (not displayed now, but planned) will be added from random positions
		positionnodes = positionnodesPossible.randomp; 

		if ((data.next_page !== undefined) && ( !state.isInitialLoad || (nodes.length == 0) ) )  {
			// all the nodes will be displayed later ! 
			// attempt to load more, in order to avoid displaying an empty screen for the next 2 minutes :-/
			if (DEBUG) { console.log("LOADING NEXT PAGE !"); }
			if (options.mode == 'direct') {
				updateTweetsFromURL(options.URL_BASE_DIRECT + data.next_page+"&since_id="+lastRetrieved + "&callback=?");
			} else {
				updateTweetsFromURL(options.URL_BASE_INDIRECT + data.next_page+"&since_id="+lastRetrieved);
			} 
			
		} else {
			// we are not loading any other page... let's plan an update ?		

			// plan next update !
			planTweeterUpdate(options.delay);
		
			state.isInitialLoad = false;
			lastRetrieved = lastRetrievedNext;
		}

		

	
}



var err ;

function updateTweetsFromURL (url) {

	if (DEBUG) { console.log("LOADING "+url); }


	 $.ajax({ 
	  url: url, 
	  dataType: 'json', 
	  data: {}, 
	  success: processResults, 
	  timeout: options.timeoutGetTweets, 
	  error: function(jqXHR, status, errorThrown){   //the status returned will be "timeout" 

		if (DEBUG) { console.log("error: "+errorThrown); }
		
		//$("#wait").hide();	

		//displayMessage('indirect');
		planTweeterUpdate(options.delayRetryError);		
	  } 
	}); 
}

function updateTweets() {

	// no more pending
	updateHolder = undefined;

	var url2 = "";
	if (options.mode == 'direct') {
		url2 = options.URL_BASE_DIRECT+'?callback=?&';
	} else {
		url2 = options.URL_BASE_INDIRECT + '?';
	} 

	url2 = url2+'q='+searched+'&since_id='+lastRetrieved+"&rpp=100&result_type=mixed&include_entities=1"; // old &include_rts=1
        url = url2;

	//displayMessage('loading');

	$("#wait").show();	

	if (DEBUG) { console.log("refresh from url: "+url); }

	updateTweetsFromURL(url);

	
}
function initLoad() {
	if (urlParams.preset !== undefined) {
		var requiredIdx = parseInt(urlParams.preset);
		if (requiredIdx != NaN) {
			if (DEBUG) { console.log("loading preset with idx: "+requiredIdx); }
			// attempts to use this parameter to set the value
			guiElements.formparams.elements["preset"].options[urlParams.preset].selected = "1";
			presedChoosed();
			return;
		} 
	} 

	if (urlParams.query !== undefined) {
		if (DEBUG) { console.log("loading query : "+urlParams.query); }
		loadFromShort(decodeURI(urlParams.query));
		return;
	}

	// default	
	randompreset();
	
}
function refresh() {
	changedParams();
}

function initEverything() {

	$("#stop").click(function(){	stopLoadUpdate();	state.force.stop();	});
	$("#refresh").click(function(){	refresh();	});

	// don't hide the display when the user is willing to interact with it !
	tweetdisplay.container.mouseover(function() {
	  showTweetDisplay();
	});

	window.onload = initLoad();


}

initEverything();