// 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 lpad = (gPrefs.get('comments','threadpad') == '1') ? gConf['iCommentThreadPadding'] : 0 ; // gIThreadPad ... TODO 'configurize'

      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() ;

        }

      }

    },

    setAnimationToPositionsAndFocus : function (y, focusCommentId, reply) {

      this._initAnimations();

      var lpad = (gPrefs.get('comments','threadpad') == '1') ? gConf['iCommentThreadPadding'] : 0 ;

      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] ;

          }

          if (iComment.commentId >= focusCommentId)

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

          else

            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() ;    

    },

    whenAnimationsEndFocus : function () {

      gGETValues = CY.JSON.parse(sv_get_params);

      if ("comment_id_key" in gGETValues) {

        var id_key = gGETValues["comment_id_key"];

        var focusComment = gDb.getCommentByIdKey(id_key);

        if (focusComment != null)

          gIComments.getIComment(focusComment.id).overlay.focus();

      }

      gSync.resume();

    },

    whenAnimationsEndReply : function () {

      gGETValues = CY.JSON.parse(sv_get_params);

      if ("comment_id_key" in gGETValues) {

        var id_key = gGETValues["comment_id_key"];

        var focusComment = gDb.getCommentByIdKey(id_key);

        if (focusComment != null) {

          gSync.showReplyForm(gIComments.getIComment(focusComment.id));

        }

      }

      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 ;