/** A widget to display slide show from embed slide share */

IriSP.SlideShareWidget = function(Popcorn, config, Serializer) {

  IriSP.Widget.call(this, Popcorn, config, Serializer);

};

IriSP.SlideShareWidget.prototype = new IriSP.Widget();

IriSP.SlideShareWidget.prototype.draw = function() {

  var self = this;

  var templ = Mustache.to_html(IriSP.slideShareWidget_template);

  this.selector.append(templ);

  // Synchro management

  this._disableUpdate = false;

  this.selector.find('.sync_on').click(function(event) { self.syncHandler.call(self, event); });

  this.selector.find('.sync_off').click(function(event) { self.unSyncHandler.call(self, event); });

  // global variables used to keep the position and width of the zone.  

  this.zoneLeft = 0;

  this.zoneWidth = 0;

  // global variable to save the last slide url

  this.lastSlide = "";

  this.containerDiv = this.selector.find('.SlideShareContainer');

  // Update the slide from timeupdate event

  this._Popcorn.listen("timeupdate", IriSP.wrap(this, this.slideShareUpdater));

  this._Popcorn.listen("IriSP.SlideShareWidget.show", IriSP.wrap(this, this.show));

  this._Popcorn.listen("IriSP.SlideShareWidget.hide", IriSP.wrap(this, this.hide));

  // Get data from "slideshare" cutting/annotation-type

  var annotations = this._serializer._data.annotations;

  var view_type = this._serializer.getSlideShareType();

  if(typeof(view_type) === "undefined") {

    return;  

  }

  var i = 0;

  this.segments_slides = [];

  var nb_annot = annotations.length;

  for (i = 0; i < nb_annot; i++) {

    var annotation = annotations[i];

    /* filter the annotations whose type is not the one we want */

    if (view_type != "" && typeof(annotation.meta) !== "undefined" && typeof(annotation.meta["id-ref"]) !== "undefined"

          && annotation.meta["id-ref"] != view_type) {

        continue;

    }

    this.segments_slides.push(annotation);

  }

};

/* update the slider and the position marker as time passes */

IriSP.SlideShareWidget.prototype.slideShareUpdater = function() {

  // If it is asked not to synchronize, we do nothing

  if(this._disableUpdate)

    return;

  var self = this;

  // We search if a segments_slides is in the current timecode

  var time = this._Popcorn.currentTime() * 1000;

  var nb_slides = this.segments_slides.length;

  var found = false;

  for (i = 0; i < nb_slides; i++) {

    var segment_slide = this.segments_slides[i];

    if(segment_slide.begin<time && time<segment_slide.end){

    	found = true;

    	if(segment_slide.content.description!=this.lastSlide){

			// The url is like http://stuf.com#X and X is the slide number. So we split and save it.

    		this.lastSlide = segment_slide.content.description;

    		var description_ar = this.lastSlide.split("#");

    		console.log("description_ar = " + description_ar);

    		var slideUrl = description_ar[0];

    		var slideNb = description_ar[1];

    		// We have the slideshare oembed url.

    		var url = "http://www.slideshare.net/api/oembed/2?format=jsonp&url=" + slideUrl;

    		IriSP.jQuery.ajax({

				url: url,

				dataType: "jsonp",

				success: function(data) {

					ss_id = data["slideshow_id"];

					embed_code = data["html"];

					// If slideNb exist, we hack the embed code to add ?startSlide=X

					if(slideNb){

						embed_code = embed_code.replace(new RegExp("embed_code/"+ss_id), "embed_code/" + ss_id + "?startSlide=" + slideNb);

					}

					self.containerDiv.html(embed_code);

				},

				error: function(jqXHR, textStatus, errorThrown){

					self.containerDiv.html("Error while downloading the slideshow. jqXHR = " + jqXHR + ", textStatus = " + textStatus + ", errorThrown = " + errorThrown);

				}

    		});

    		/*

    		var url = this.url_proxy;

    		if(url.search(/\?/)<0){

    			url += "?";

    		}

    		url += "&" + this.parameter_name + "=" + this.lastSlide;

    		IriSP.jQuery.ajax({

				url: url,

				success: function(xml) {

					xml = IriSP.jQuery.parseXML(xml);

					self.containerDiv.html(xml);

				},

				error: function(jqXHR, textStatus, errorThrown){

					self.containerDiv.html("Error while downloading the slideshow. jqXHR = " + jqXHR + ", textStatus = " + textStatus + ", errorThrown = " + errorThrown);

				}

    		});

    		*/

    		return;

    	}

    }

  }

  if(found==false){

  	this.lastSlide = "";

  	this.containerDiv.html("");

  }

};

// Functions to stop or trigger sync between timeupdate event and slides        

IriSP.SlideShareWidget.prototype.unSyncHandler = function(params) {

	//console.log("slideShare NO SYNC !");

	this._disableUpdate = true;

};

IriSP.SlideShareWidget.prototype.syncHandler = function(params) {

	//console.log("slideShare SYNC PLEASE !");

	this._disableUpdate = false;

};

/** responds to an "IriSP.SlideShareWidget.position" message

    @param params an array with the first element being the left distance in

           percents and the second element the width of the slice in pixels

*/        

IriSP.SlideShareWidget.prototype.positionSlideShareHandler = function(params) {

  //console.log("positionSlideShareHandler");

};

IriSP.SlideShareWidget.prototype.show = function() {

  this.selector.show();

};

IriSP.SlideShareWidget.prototype.hide = function() {

  this.selector.hide();

};

// SHA1ise function

IriSP.SlideShareWidget.prototype.sha1 = function(msg) {

	function rotate_left(n,s) {

		var t4 = ( n<<s ) | (n>>>(32-s));

		return t4;

	};

	function lsb_hex(val) {

		var str="";

		var i;

		var vh;

		var vl;

		for( i=0; i<=6; i+=2 ) {

			vh = (val>>>(i*4+4))&0x0f;

			vl = (val>>>(i*4))&0x0f;

			str += vh.toString(16) + vl.toString(16);

		}

		return str;

	};

	function cvt_hex(val) {

		var str="";

		var i;

		var v;

		for( i=7; i>=0; i-- ) {

			v = (val>>>(i*4))&0x0f;

			str += v.toString(16);

		}

		return str;

	};

	function Utf8Encode(string) {

		string = string.replace(/\r\n/g,"\n");

		var utftext = "";

		for (var n = 0; n < string.length; n++) {

			var c = string.charCodeAt(n);

			if (c < 128) {

				utftext += String.fromCharCode(c);

			}

			else if((c > 127) && (c < 2048)) {

				utftext += String.fromCharCode((c >> 6) | 192);

				utftext += String.fromCharCode((c & 63) | 128);

			}

			else {

				utftext += String.fromCharCode((c >> 12) | 224);

				utftext += String.fromCharCode(((c >> 6) & 63) | 128);

				utftext += String.fromCharCode((c & 63) | 128);

			}

		}

		return utftext;

	};

	var blockstart;

	var i, j;

	var W = new Array(80);

	var H0 = 0x67452301;

	var H1 = 0xEFCDAB89;

	var H2 = 0x98BADCFE;

	var H3 = 0x10325476;

	var H4 = 0xC3D2E1F0;

	var A, B, C, D, E;

	var temp;

	msg = Utf8Encode(msg);

	var msg_len = msg.length;

	var word_array = new Array();

	for( i=0; i<msg_len-3; i+=4 ) {

		j = msg.charCodeAt(i)<<24 | msg.charCodeAt(i+1)<<16 |

		msg.charCodeAt(i+2)<<8 | msg.charCodeAt(i+3);

		word_array.push( j );

	}

	switch( msg_len % 4 ) {

		case 0:

			i = 0x080000000;

		break;

		case 1:

			i = msg.charCodeAt(msg_len-1)<<24 | 0x0800000;

		break;

		case 2:

			i = msg.charCodeAt(msg_len-2)<<24 | msg.charCodeAt(msg_len-1)<<16 | 0x08000;

		break;

		case 3:

			i = msg.charCodeAt(msg_len-3)<<24 | msg.charCodeAt(msg_len-2)<<16 | msg.charCodeAt(msg_len-1)<<8	| 0x80;

		break;

	}

	word_array.push( i );

	while( (word_array.length % 16) != 14 ) word_array.push( 0 );

	word_array.push( msg_len>>>29 );

	word_array.push( (msg_len<<3)&0x0ffffffff );

	for ( blockstart=0; blockstart<word_array.length; blockstart+=16 ) {

		for( i=0; i<16; i++ ) W[i] = word_array[blockstart+i];

		for( i=16; i<=79; i++ ) W[i] = rotate_left(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);

		A = H0;

		B = H1;

		C = H2;

		D = H3;

		E = H4;

		for( i= 0; i<=19; i++ ) {

			temp = (rotate_left(A,5) + ((B&C) | (~B&D)) + E + W[i] + 0x5A827999) & 0x0ffffffff;

			E = D;

			D = C;

			C = rotate_left(B,30);

			B = A;

			A = temp;

		}

		for( i=20; i<=39; i++ ) {

			temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0x6ED9EBA1) & 0x0ffffffff;

			E = D;

			D = C;

			C = rotate_left(B,30);

			B = A;

			A = temp;

		}

		for( i=40; i<=59; i++ ) {

			temp = (rotate_left(A,5) + ((B&C) | (B&D) | (C&D)) + E + W[i] + 0x8F1BBCDC) & 0x0ffffffff;

			E = D;

			D = C;

			C = rotate_left(B,30);

			B = A;

			A = temp;

		}

		for( i=60; i<=79; i++ ) {

			temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0xCA62C1D6) & 0x0ffffffff;

			E = D;

			D = C;

			C = rotate_left(B,30);

			B = A;

			A = temp;

		}

		H0 = (H0 + A) & 0x0ffffffff;

		H1 = (H1 + B) & 0x0ffffffff;

		H2 = (H2 + C) & 0x0ffffffff;

		H3 = (H3 + D) & 0x0ffffffff;

		H4 = (H4 + E) & 0x0ffffffff;

	}

	var temp = cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2) + cvt_hex(H3) + cvt_hex(H4);

	return temp.toLowerCase();

};