// gConf

IComments = function() {

	// this class manages Comments interface (fetched comments <--> IComment.commentId != null)

	this._c = [] ; // IComments instances   // commentId == null means is connected to no comment anymore

	this._a = [] ; // IComments animations to run

	this._nbEndedAnim = 0 ;

	this._topActiveCommentDbId = null ; // active 

}

IComments.prototype = {

		init : function (container) {

			for (var i = 0 ; i < gConf['iCommentsInitAlloc']; i++) { 

				this._c.push(new IComment()) ;

			}

		},

		getIComment : function (commentId) {

			return CY.Array.find(this._c, function(iComment) { return (iComment.isfetched() && iComment.commentId == commentId) ;}) ;

		},

		insertAfter : function (previousComment, comment) {

			var _cids = CY.Array.map(this._c, function(iComment) { return iComment.commentId ; }) ;

			var index = CY.Array.indexOf(_cids, previousComment.id) ;

			if (index != -1) {

				this._c.splice(index + 1, 0, new IComment()) ; // will append when index + 1 == array length

				this._c[index + 1].fetch(comment) ;

				return this._c[index + 1] ;

			}

			return null ;

		},

		_remove : function (iComments) {

			var toRemoveIds = CY.Array.map(iComments, function(comment) { return comment.commentId ; }) ;

			for (var i = 0 ; i < this._c.length ; i++) { // starting at the bottom to be sure that last remove will be iComment  

				var iComment2 = this._c[i] ;

				if (iComment2.isfetched() && CY.Array.indexOf(toRemoveIds, iComment2.commentId) != -1) {

					iComment2.unfetch() ;

					this._c.push(this._c.splice(i, 1)[0]) ;

					i-- ;

				}

			}

		},

		// all children, comment's IComment included !

		// model based (cf. gDb)

		_getChildren : function (commentId) {

			return CY.Array.filter(this._c, function(iComment) { return (iComment.isfetched() && gDb.isChild(iComment.commentId,commentId)) ; }) ;

		},

		_getInvisibleChildren : function (commentId) {

			return CY.Array.filter(this._getChildren(commentId), function(iComment) { return (!iComment.isVisible()) ; }) ;

		},

		// REFRESH (readreplies link etc ?..)

		refresh : function (commentId) {

			var iComment = this.getIComment(commentId) ;

			var invisibleChildrenIComments = this._getInvisibleChildren(commentId) ;

			if (invisibleChildrenIComments.length > 0) //parentIComment is supposed to be visible

				iComment.showReadRepliesLnk() ;

			else

				iComment.hideReadRepliesLnk() ;

		},

		remove : function (commentId) {

			this._remove(this._getChildren(commentId)) ;

		},

		close : function (commentId) {

			CY.Array.each(this._getChildren(commentId), function (iComment) { iComment.hide() ; }) ;

		},

		open : function (commentId) {

			CY.Array.each(this._getChildren(commentId), function (iComment) { iComment.show() ; }) ;

		},

		fetch : function (comments) {

			// fill

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

				if (i == this._c.length)

					this._c.push(new IComment()) ;

				this._c[i].fetch(comments[i]) ;

			}

			// nullify others

			for (var i = comments.length ; i < this._c.length ; i++) {

				this._c[i].unfetch() ;

			}

		},

		setPosition : function (xy) {

			CY.each(this._c, function (iComment) { iComment.setPosition(xy) ; }) ;

		},

		show : function () {

			CY.each(this._c, function (iComment) { 

				if (iComment.isfetched()) {

					iComment.show();

				}}) ;

		},

		hide : function () {

			this.deactivate(); // to prevent a chain of activate / deactivate while hiding IComments one by one

			CY.each(this._c, function (iComment) { if (iComment.commentId != null) iComment.hide(); }) ;

		},

		setWidth : function (colWidth) {

			var nextY = null ;

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

				var iComment = this._c[i] ;

				iComment.setWidth(colWidth) ;

				if (iComment.commentId != null && iComment.isVisible()) {

					var xy = iComment.getPosition() ;

					if (nextY == null) 

						nextY = xy[1] ;

					xy[1] = nextY ;

					iComment.setPosition(xy) ;

					nextY += iComment.getHeight() ;

				}

			}

		},

		getTopPosition:function() {

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

				var iComment = this._c[i] ;

				if (iComment.commentId != null && iComment.isVisible())

					return iComment.getPosition() ;

			}

			return null

		},

		getPosition:function(id) {

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

				var iComment = this._c[i] ;

				if (iComment.commentId == id && iComment.isVisible())

					return iComment.getPosition() ;

			}

			return null ;

		},

		setAnimationToPositions : function (y) {

			this._initAnimations();

			//CY.log(gPrefs.get('comments','threadpad')) ;

			var nextY = y ;

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

				var iComment = this._c[i] ;

				if (iComment.isfetched && iComment.isVisible()) {

					var comment_path = gDb.getPath(gDb.getComment(iComment.commentId)) ;

					var iCommentX = ((comment_path.length - 1) * lpad) + gConf['iCommentLeftPadding'] ;

					if (nextY == null) {

						var xy = iComment.getPosition() ;

						nextY = xy[1] ;

					}

					this._a.push(iComment.setAnimationToPosition([iCommentX, nextY])) ;

					nextY += iComment.getHeight() ;

				}

			}

		},

// ANIMATION FUNCTIONS		

		_initAnimations : function () {

			this._a = [] ;

			this._nbEndedAnim = 0 ; 		

		},

		runAnimations : function () {

			if (this._a.length == 0) // will occur when closing last displayed comment

				gSync.resetAutoContinue("animationRun") ;

			else 

				CY.each(this._a, function (animation) { animation.run() ; }) ;

		},

		whenAnimationsEnd : function () {

			gSync.resume() ; 		

		},

		animationsEnded : function () {

			return ((this._a.length == 0) || (this._a.length == this._nbEndedAnim)) ; 		

		},

		signalAnimationEnd : function () {

			this._nbEndedAnim++ ;					

		},

// ACTIVE RELATED FUNCTIONS		

		// returns true only for the top iComment

		isTopActive : function(commentDbId) {

			return ((commentDbId != null) && (this._topActiveCommentDbId == commentDbId)) ;

		},

		isAnyActive : function() {

			return (this._topActiveCommentDbId != null) ;

		},

		//warning : calling this function "focus" would make IE get mad

		activate : function(commentDbId) {

			if (this._topActiveCommentDbId != null) {// then deactivate current 

				this.deactivate() ;

			}

			// activate whole top parent thread

			var comment = gDb.getComment(commentDbId) ;

			var comment_path = gDb.getPath(comment) ;

			var topParent = comment_path[comment_path.length - 1] ;

			var iComments = this._getChildren(topParent.id) ;

			CY.Array.each(iComments, function(iComment){iComment.activate();}) ;

			this._topActiveCommentDbId = topParent.id ;

			// update browser index

			if (gLayout.isInFrame()) {

				var indxDict = gDb.browsingIndex(this._topActiveCommentDbId) ;

				parent.$("#browse_by option").each(function() {

					var rank = 1 + indxDict[this.value] ;

					parent.$("#c_browse_indx_"+this.value).html(''+ rank) ;

				}) ;

			}

			showScope(topParent.id) ;

		},

		deactivate : function() {

			if (this._topActiveCommentDbId != null) {

				parent.$("#browse_by option").each(function() {

					parent.$("#c_browse_indx_"+this.value).html('-') ;

				}) ;

				// scopes

				hideScopeAnyway() ;

				var iComments = this._getChildren(this._topActiveCommentDbId) ;

				CY.Array.each(iComments, function(iComment){iComment.deactivate();}) ;

				this._topActiveCommentDbId = null ;

			}

		},

		// active next IComment among the displayed ones (try below and if couldn't try above)

		// model based

		activateVisibleNext : function() {

			if (this._topActiveCommentDbId != null) {

				for (var j = 0 ; j < 2 ; j++) {

					var start = (j==0) ? 0 : this._c.length - 1 ; 

					var b = false ;

					for (var i = start ; (i >= 0) && i <= (this._c.length - 1) ;) {

						var iComment = this._c[i] ;

						if (iComment.commentId != null && iComment.isVisible()) {

							b = b || (gDb.isChild(iComment.commentId,this._topActiveCommentDbId)) ; 

							if (b && (!gDb.isChild(iComment.commentId,this._topActiveCommentDbId))) { // found the one below that doesn't have topActive as parent

								this.activate(iComment.commentId) ;

								return true ;

							}

						}

						i = (j == 0) ? i + 1 : i - 1 ;

					}

				}

			}

			return false ;

		},

		browse : function(order, whereto) {

			var wt = whereto ;

			if ((whereto == "prev") && !this.isAnyActive()) {

				wt = "last" ;

			}

			if ((whereto == "next") && !this.isAnyActive()) {

				wt = "first" ;

			}

			return gDb.browse(order, wt, this._topActiveCommentDbId) ;

		}

}