// globals used: gConf, gPrefs, gLayout, gSync


// IComment == IHM comment class 
IComment = function() {
  
  this.commentId = null ;
  
  var iCommentWidth = gLayout.getTopICommentsWidth() ;  
  var iCommentLeft = gConf['iCommentLeftPadding'] ;
  
  var changeToPending = gettext("change comment state to pending") ;
  var changeToApprove = gettext("change comment state to approved") ;
  var changeToUnapprove= gettext("change comment state to unapproved") ;
  var cancelChange = gettext("cancel changing the state of this comment") ;
  var pending = gettext("pending") ;
  var approved = gettext("approved") ;
  var unapproved = gettext("unapproved") ;
  var cancel = gettext("cancel") ;
  var showReplies = gettext("show replies") ;
  var changeTo= gettext("change to:") ;
  var reply = ngettext("reply","replies",1) ; // hack to get django to add 'replies' as the plural in f_text_view_frame !!
  var editComment = gettext("edit comment") ;
  var deleteComment = gettext("delete comment") ;
  var edit = gettext("edit") ;
  var del = gettext("delete") ;
  var close = gettext("close") ;
  var showScope = gettext("show scope") ;
  var scopeRemoved = gettext("Comment is detached: it was created on a previous version and text it applied to has been modified or removed.") ;
  
  // no header, no body yet 
  this.overlay = new CY.Overlay( {
    zIndex :3,
    shim :false, /* until we really need it, no shim */
    visible :false,
    width : iCommentWidth,
    xy : [ iCommentLeft, 0 ],
    headerContent : '<div class="icomment-header">' +
              '<div class="c-iactions">' +  
                '<a class="c-moderate c-action" title="">'+ "vis" +'</a>' + " " +  
                '<a class="c-edit c-action" title="'+ editComment +'" alt="' + editComment + '">' + edit + '</a>' + " " +   
                '<a class="c-delete c-action" title="'+ deleteComment +'" alt="' + deleteComment + '">' + del + '</a>' + " " +   
              '</div>' +
              '<div class="c-state-actions displaynone">' +
                changeTo + '&nbsp;' +
                '<a class="c-state-pending c-action" title="' + changeToPending + '" alt="' + changeToPending + '">'+ pending +'</a>' + " " +  
                '<a class="c-state-approved c-action" title="' + changeToApprove + '" alt="' + changeToApprove + '">'+ approved +'</a>' + " " +  
                '<a class="c-state-unapproved c-action" title="' + changeToUnapprove + '" alt="' + changeToUnapprove + '">'+ unapproved +'</a>' + " " +  
                '<a class="c-state-cancel c-action" title="' + cancelChange + '" alt="' + cancelChange + '">' + cancel +'</a>' + " " +  
              '</div>' + 
              '<div class="c-no-scope-msg">' +
                scopeRemoved +  
              '</div>' + 
              '<a class="c-show-scope c-action" title="'+ showScope + '" alt="' + showScope + '"><em>-</em></a>' +
              '<a class="c-close c-action" title="'+ close + '" alt="' + close + '"><em>X</em></a>' +
            '</div>',
    bodyContent : '<div class="icomment-body">' +
            '<span class="c-content"></span>' +
            '<span class="c-ireplyactions">' +
            '<a class="c-readreplies c-action" title="'+ showReplies +'" alt="' + showReplies + '">' + showReplies +'</a>' + " " +  
            '<a class="c-reply c-action" title="'+ reply +'" alt="' + reply + '">' + reply +'</a>' + "&nbsp;" +  
            '</span>' +
            '</div>'
  });
  
  this.overlay.get('contentBox').addClass("c-comment") ;
  
  // attach to DOM
  this.overlay.render('#leftcolumn');
  
  this.animation = new CY.Anim({
        node: this.overlay.get('boundingBox'),
        duration: gPrefs.get('general','animduration'),
        easing: CY.Easing.easeOut
    });   

  // CY.on won't work 
  this.overlay.get('contentBox').query(".c-close").on("click", this.onCloseCommentClick, this);
  this.overlay.get('contentBox').query(".c-moderate").on("click", this.onModerateCommentClick, this);
  this.overlay.get('contentBox').query(".c-state-pending").on("click", this.onPendingCommentClick, this);
  this.overlay.get('contentBox').query(".c-state-approved").on("click", this.onApprovedCommentClick, this);
  this.overlay.get('contentBox').query(".c-state-unapproved").on("click", this.onUnapprovedCommentClick, this);
  this.overlay.get('contentBox').query(".c-state-cancel").on("click", this.onCancelStateChangeClick, this);
  this.overlay.get('contentBox').query(".c-edit").on("click", this.onEditCommentClick, this);
  this.overlay.get('contentBox').query(".c-delete").on("click", this.onDeleteCommentClick, this);
  this.overlay.get('contentBox').query(".c-reply").on("click", this.onReplyCommentClick, this);
  this.overlay.get('contentBox').query(".c-readreplies").on("click", this.onReadRepliesCommentClick, this);

  this.overlay.get('contentBox').query(".icomment-header").on("mouseenter", this.onMouseEnterHeader, this);
  this.overlay.get('contentBox').query(".icomment-header").on("mouseleave", this.onMouseLeaveHeader, this);
  
  this.overlay.get('contentBox').on("click", this.onCommentClick, this);
}

IComment.prototype = {
  // checking readyForAction is not enough because handler could be called after animation end in the case : 
  // close btn is clicked before animation end (so before overlay gets hidden) but handler is called after so preventClickOn is false and close is called on an invisible overlay.
  // (whan clicking very fast on the close button while close animation is taking place).
  // SO : SHOULD ALWAYS CHECK FOR VISIBLE OVERLAY IN HANDLERS THAT COULD BE CALLED FROM AN ANIMATED OVERLAY
  onCloseCommentClick : function (e) {
    e.halt() ; // prevent click triggered on content box
    if (readyForAction() && this.isVisible()) 
      gSync.closeComment(this) ;
  },
  onModerateCommentClick : function (e) {
    e.halt() ; // prevent click triggered on content box
    if (readyForAction() && this.isVisible()) {
      this.overlay.get('contentBox').query(".c-iactions").addClass("displaynone") ;
      this.overlay.get('contentBox').query(".c-state-actions").removeClass("displaynone") ;
    }
  },
  onPendingCommentClick : function (e) {
    e.halt() ; // prevent click triggered on content box
    if (readyForAction() && this.isVisible()) {
      gSync.moderateComment(this, 'pending') ;
    }
  },
  onApprovedCommentClick : function (e) {
    e.halt() ; // prevent click triggered on content box
    if (readyForAction() && this.isVisible()) {
      gSync.moderateComment(this, 'approved') ;
    }
  },
  onUnapprovedCommentClick : function (e) {
    e.halt() ; // prevent click triggered on content box
    if (readyForAction() && this.isVisible()) {
      gSync.moderateComment(this, 'unapproved') ;
    }
  },
  onCancelStateChangeClick : function (e) {
    e.halt() ; // prevent click triggered on content box
    if (readyForAction() && this.isVisible()) {
      this.overlay.get('contentBox').query(".c-iactions").removeClass("displaynone") ;
      this.overlay.get('contentBox').query(".c-state-actions").addClass("displaynone") ;
    }
  },
  onDeleteCommentClick : function (e) {
    e.halt() ; // prevent click triggered on content box
    if (readyForAction() && this.isVisible()) {
      gSync.removeComment(this) ;
    }
  },
  onEditCommentClick : function (e) {
    e.halt() ; // prevent click triggered on content box
    if (readyForAction() && this.isVisible()) 
      gSync.showEditForm(this) ;
  },
  onReplyCommentClick : function (e) {
    e.halt() ; // prevent click triggered on content box
    if (readyForAction() && this.isVisible()) 
      gSync.showReplyForm(this) ;
  },
  onReadRepliesCommentClick : function (e) {
    e.halt() ; // prevent click triggered on content box
    if (readyForAction() && this.isVisible()) 
      gSync.openComment(this) ;
  },
  onCommentClick : function (e) {
    if (readyForAction() && this.isVisible()) {
      // first condition here is checking it's not clicked via a 'show comments'  link
      if (e.target.get("target") == "_blank") {
        var link = e.target ;
        var showCommentUrl = sv_site_url + sv_text_view_show_comment_url ;
        if (link.get('href').indexOf(showCommentUrl) == 0) { 
          var res = (new RegExp('comment_id_key=([^&]*)', "g")).exec(link.get('href')) ;
          if (res != null) {
            // open new comment .... we'll suppose it satisfies the filter for now
            // TODO : should we reset the filter in this case ? instead of having the link open in a new window
            var id_key = res[1] ;
            var comment = gDb.getCommentByIdKey(id_key) ;
            if (comment != null) {
              e.halt() ;
              if (!link.hasClass("c-permalink")) {// clicking on the permalink itself should do anything
                checkForOpenedDialog(null, function() {
                  gSync.showSingleComment(comment) ;
                }) ;
              }
            }
          }
        }
      }
      else {
        if (gShowingAllComments) {
          // next special dirty case test explained : when editing/replying to a comment with gShowingAllComments a click in the edit/reply form also is a click on the iComment, in this case we don't want to showSingleComment ....
          // should be handled via a preventDefault in some way
          if (!this._isHostingAForm()) {
            var comment = gDb.getComment(this.commentId) ;
            checkForOpenedDialog(null, function() {
              if (comment != null) 
                gSync.showSingleComment(comment) ;
            })
          }
        }
        else 
          gSync.activate(this) ;
      }
    }
  },  
  
  onMouseEnterHeader : function () {
    if (readyForAction() && this.isVisible()) {
      this.overlay.get('contentBox').query(".c-permalink").removeClass('displaynone');
    }
  },
  
  onMouseLeaveHeader : function () {
    if (readyForAction() && this.isVisible()) {
      this.overlay.get('contentBox').query(".c-permalink").addClass('displaynone');
    }
  },  
  
  setWidth : function(width) {
      this.overlay.get('boundingBox').setStyle("width", width + 'px');
  },
  
  activate:function() {
    // debug !!
//    CY.log('activate' + this.commentId) ;
    this.overlay.get('boundingBox').addClass('c-focus-comment') ;
    
  },
  
  deactivate:function() {
    // debug !!
//    CY.log('deactivate' + this.commentId) ;
    this.overlay.get('boundingBox').removeClass('c-focus-comment') ;
    
  },
  hide:function() {
    // is IComment the top active one ?
    if (gIComments.isTopActive(this.commentId)) { // then try to activate next in displayed list
      if (!gIComments.activateVisibleNext())
        gIComments.deactivate() ;
    }

    if (this.isVisible()) {
      this.overlay.hide();
      this.overlay.blur() ;
    }
  },
  hideContent:function() {
    this.overlay.get('contentBox').query(".icomment-header").addClass('displaynone') ;
    this.overlay.get('contentBox').query(".icomment-body").addClass('displaynone') ;
  },
  showContent:function() {
    this.overlay.get('contentBox').query(".icomment-header").removeClass('displaynone') ;
    this.overlay.get('contentBox').query(".icomment-body").removeClass('displaynone') ;
  },
  isVisible:function() {
    return this.overlay.get('visible') ;
  },
  show:function() {
    this.hideReadRepliesLnk() ; // for now
    return this.overlay.show() ;
  },
  showReadRepliesLnk:function() {
    this.overlay.get('contentBox').query(".c-readreplies").removeClass('displaynone') ;
  },
  hideReadRepliesLnk:function() {
    this.overlay.get('contentBox').query(".c-readreplies").addClass('displaynone') ;
  },
  changeModeration:function(comment) {
    var moderationLnk = this.overlay.get('contentBox').query(".c-moderate") ;
    moderationLnk.set("innerHTML", gettext(comment.state)) ;
    
    moderationLnk.removeClass("c-state-approved") ;
    moderationLnk.removeClass("c-state-pending") ;
    moderationLnk.removeClass("c-state-unapproved") ;
    moderationLnk.addClass("c-state-" + comment.state) ;

    this.overlay.get('contentBox').query(".c-iactions").removeClass("displaynone") ;
    this.overlay.get('contentBox').query(".c-state-actions").addClass("displaynone") ;
  },
  isfetched : function() {
    return (this.commentId != null) ;
  },
  unfetch : function() {
    this.commentId = null ;
  },
  fetch : function(comment) {
    this.commentId = comment.id ;
    var boundingBoxNode = this.overlay.get('boundingBox') ;
    
    if (comment['start_wrapper'] != -1){ 
      boundingBoxNode.addClass('c-has-scope') ;
      boundingBoxNode.removeClass('c-has-no-scope') ;
    }
    else { 
      boundingBoxNode.addClass('c-has-no-scope') ;
      boundingBoxNode.removeClass('c-has-scope') ;
    }
    
    if (comment['reply_to_id'] != null){ 
      boundingBoxNode.addClass('c-is-reply') ;
    }
    else { 
      boundingBoxNode.removeClass('c-is-reply') ;
    }
    
    // TITLE
    var titleInfos = interpolate(gettext('last modified on %(date)s'),{'date':comment.modified_user_str}, true) ;
    
    var modifDateTooltip = (comment.modified == comment.created) ? '' : '<a title="' + titleInfos + '"> * </a>' ;
    var permaTitle = gettext('Permalink to this comment') ;
    var permalink = '<a class="c-permalink displaynone c-action" target="_blank" title="'+ permaTitle +'" href="" >¶&nbsp;</a>' ;
    
    var infos = interpolate(gettext('by %(name)s, created on %(date)s'),{'name':comment.name, 'date':comment.created_user_str}, true) ;
    
    var newTitleContent = '<span class="c-header"><div class="c-header-title">' + comment.title + permalink + '</div><div class="c-infos">' + infos + '</div></span>' ;
    
    var newTitleNode = CY.Node.create(newTitleContent) ;
    var prevTitleNode = boundingBoxNode.query(".c-header") ;
    if (prevTitleNode == null) // first time, no title yet
      boundingBoxNode.query('.icomment-header').insertBefore(newTitleNode, boundingBoxNode.query('.c-iactions')) ;
    else 
      prevTitleNode.get('parentNode').replaceChild(newTitleNode, prevTitleNode) ;

    // TAG
    var newTagNode = CY.Node.create('<div class="c-tags"><span class="c-tags-infos">' + 'tags:' + '</span>' + comment.tags + '</div>') ;
    var prevTagNode = boundingBoxNode.query(".c-tags") ;
    if (prevTagNode == null) 
      boundingBoxNode.query('.icomment-header').appendChild(newTagNode) ;
    else 
      prevTagNode.get('parentNode').replaceChild(newTagNode, prevTagNode) ;
    // NO TAG ?
    if (comment.tags == "")
      newTagNode.addClass('displaynone') ;

    // CATEGORY
    var newCatNode = CY.Node.create('<div class="c-cat">' + gettext("category") + ':&nbsp;<span class="c-cat-val c-cat-' + comment.category + '">' + categories[comment.category] + '</span></div>') ;
    var prevCatNode = boundingBoxNode.query(".c-cat") ;
    if (prevCatNode == null) 
      boundingBoxNode.query('.icomment-header').appendChild(newCatNode) ;
    else 
      prevCatNode.get('parentNode').replaceChild(newCatNode, prevCatNode) ;
    // NO CATEGORY ?
    if (comment.category == 0) 
      newCatNode.addClass('displaynone') ;

    // CONTENT
    var newContentNode = CY.Node.create('<span class="c-content">' + comment.content_html + '</span>') ;
    var prevContentNode = boundingBoxNode.query(".c-content") ;
    if (prevContentNode == null) 
      boundingBoxNode.query('.icomment-body').appendChild(newContentNode) ;
    else 
      prevContentNode.get('parentNode').replaceChild(newContentNode, prevContentNode) ;

    // PERMALINK
    if (sv_prefix=="") {
      boundingBoxNode.query(".c-permalink").set("href",sv_site_url + comment.permalink) ;
    }
    else {
      comment_id_delta_prefix = sv_delta != '' ? Array(parseInt(sv_delta)+1).join(',') : '';
      boundingBoxNode.query(".c-permalink").set("href", top.location.protocol + '//' + top.location.hostname + top.location.pathname + '?comment_id_key=' + comment_id_delta_prefix + comment.id_key) ;
    }

    // MODERATION
    this.changeModeration(comment) ;
/* useless : use implemendted permanentlink instead
 * 
    // also change link title to give users the possibility to know comment id (to be able to reference this exact comment in GET arguments) 
    var moderationLnk = this.overlay.get('contentBox').query(".c-moderate") ;
    //var cid = (comment.reply_to_id == null) ? this.commentId : "" ;
    moderationLnk.set("title", "click to change comment ID visibility".replace(/ID/, this.commentId).replace(/  /, " ")) ;
    
 */   
    // open links in new window :
    var links = boundingBoxNode.queryAll(".c-content a") ;
    if (links != null)
      links.setAttribute( "target" , "_blank" ) ;
    links = boundingBoxNode.queryAll(".c-header-title a") ;
    if (links != null)
      links.setAttribute( "target" , "_blank" ) ;
    
    this.permAdapt(comment) ;
  },

  permAdapt : function(comment) {
    // this comment permissions 
    var delLnk = this.overlay.get('contentBox').query(".c-delete") ; 
    if (delLnk) { // there will be a server side check anyway
      if (!comment.can_delete)
        delLnk.addClass('displaynone') ;
      else 
        delLnk.removeClass('displaynone') ;
    }

    var editLnk = this.overlay.get('contentBox').query(".c-edit") ; 
    if (editLnk) {  
      if (!comment.can_edit) 
        editLnk.addClass('displaynone') ;
      else 
        editLnk.removeClass('displaynone') ;
    }
    
    var replyLnk = this.overlay.get('contentBox').query(".c-reply") ;
    if (replyLnk) {
      if (!hasPerm("can_create_comment"))
        replyLnk.addClass('displaynone') ;
      else 
        replyLnk.removeClass('displaynone') ;
    }

    var moderateLnk = this.overlay.get('contentBox').query(".c-moderate") ; 
    if (moderateLnk) {  
      if (!comment.can_moderate)  
        moderateLnk.addClass('displaynone') ;
      else 
        moderateLnk.removeClass('displaynone') ;
    }
  },
  setThreadPad : function(pad) { // TODO review ...
    this.overlay.get('contentBox').query('.yui-widget-hd').setStyle('paddingLeft', pad + 'px') ;
    this.overlay.get('contentBox').query('.yui-widget-bd').setStyle('paddingLeft', pad + 'px') ;
    
  },
  setPosition : function(xy) {
    var boundingBoxNode = this.overlay.get('boundingBox') ;

      boundingBoxNode.setStyle("opacity", 1); // TODO check this is still usefull
      boundingBoxNode.setXY(xy) ;
  },
  getPosition : function(xy) {
    var boundingBoxNode = this.overlay.get('boundingBox') ;

      return boundingBoxNode.getXY() ;
  },
  onAnimationEnd : function() {
    if (!CY.Lang.isUndefined(this['animation-handle']) && !CY.Lang.isNull(this['animation-handle'])) { 
      this['animation-handle'].detach() ;
      this['animation-handle'] = null ;
//      CY.log('detached...') ;
    }
    gIComments.signalAnimationEnd() ;
    if (gIComments.animationsEnded())
      gIComments.whenAnimationsEnd() ;    
  },
  onAnimationEndFocus : function() {
    if (!CY.Lang.isUndefined(this['animation-handle']) && !CY.Lang.isNull(this['animation-handle'])) { 
      this['animation-handle'].detach() ;
      this['animation-handle'] = null ;
//      CY.log('detached...') ;
    }
    gIComments.signalAnimationEnd() ;
    if (gIComments.animationsEnded())
      gIComments.whenAnimationsEndFocus() ;   
  },
  onAnimationEndReply : function() {
    if (!CY.Lang.isUndefined(this['animation-handle']) && !CY.Lang.isNull(this['animation-handle'])) { 
      this['animation-handle'].detach() ;
      this['animation-handle'] = null ;
//      CY.log('detached...') ;
    }
    gIComments.signalAnimationEnd() ;
    if (gIComments.animationsEnded())
      gIComments.whenAnimationsEndReply() ;   
  },

  //aa = new CY.Anim({node:gIComments._c[0].overlay.get('boundingBox'), to:{xy : [0,0]}, duration:2.0})
  setAnimationToPosition : function(toXY, focus, reply) {
    var boundingBoxNode = this.overlay.get('boundingBox') ;
    
    // ANIMATION
      // 2 lines of optim that could be removed (0.011)
    if (gPrefs.get('general','animduration') < 0.011) 
        boundingBoxNode.setXY(toXY) ;
    
    this.animation.set('to', { xy: toXY});
    this.animation.set('duration', gPrefs.get('general','animduration')) ; // shouldn't be here really ...
    if (focus)
      if (reply)
        this['animation-handle'] = this.animation.on('end', this.onAnimationEndReply, this);
      else
        this['animation-handle'] = this.animation.on('end', this.onAnimationEndFocus, this);
    else
      this['animation-handle'] = this.animation.on('end', this.onAnimationEnd, this);
    
    return this.animation ;
  },
  getHeight : function() {
    return this.overlay.get('boundingBox').get('offsetHeight') ;
  },
  scrollIntoView : function() {
    //this.isVisible() && 
    if (!this.overlay.get('contentBox').inViewportRegion())
      this.overlay.get('contentBox').scrollIntoView(true) ;
  },
  _isHostingAForm : function() {
    return (this.isVisible() && ((gNewReplyHost != null && gNewReplyHost == this) || (gEditICommentHost != null && gEditICommentHost == this)));
  }

}