import Comments from './collection.js';
import Posts from "meteor/nova:posts";
import Users from 'meteor/nova:users';

Comments.methods = {};
// ------------------------------------------------------------------------------------------- //
// -------------------------------------- Submit Comment ------------------------------------- //
// ------------------------------------------------------------------------------------------- //

Comments.methods.new = function (comment) {

  const currentUser = Meteor.users.findOne(comment.userId);

  comment = Telescope.callbacks.run("comments.new.sync", comment, currentUser);

  comment._id = Comments.insert(comment);

  // note: query for comment to get fresh document with collection-hooks effects applied
  Telescope.callbacks.runAsync("comments.new.async", Comments.findOne(comment._id));

  return comment;
};

Comments.methods.edit = function (commentId, modifier, comment) {

  if (typeof comment === "undefined") {
    comment = Comments.findOne(commentId);
  }

  modifier = Telescope.callbacks.run("comments.edit.sync", modifier, comment);

  Comments.update(commentId, modifier);

  Telescope.callbacks.runAsync("comments.edit.async", Comments.findOne(commentId), comment);

  return Comments.findOne(commentId);
};

// ------------------------------------------------------------------------------------------- //
// ----------------------------------------- Methods ----------------------------------------- //
// ------------------------------------------------------------------------------------------- //

Meteor.methods({

  /**
   * @summary Meteor method for submitting a comment from the client
   * Required properties: postId, body
   * @memberof Comments
   * @isMethod true
   * @param {Object} comment - the comment being inserted
   */
  'comments.new': function(comment){

    Comments.simpleSchema().namedContext("comments.new").validate(comment);

    comment = Telescope.callbacks.run("comments.new.method", comment, Meteor.user());
    
    if (Meteor.isServer && this.connection) {
      comment.userIP = this.connection.clientAddress;
      comment.userAgent = this.connection.httpHeaders["user-agent"];
    }

    return Comments.methods.new(comment);
  },

  /**
   * @summary Meteor method for editing a comment from the client
   * @memberof Comments
   * @isMethod true
   * @param {Object} commentId - the id of the comment being updated
   * @param {Object} modifier - the update modifier
   */
  'comments.edit': function (commentId, modifier) {

    Comments.simpleSchema().namedContext("comments.edit").validate(modifier, {modifier: true});
    check(commentId, String);

    const comment = Comments.findOne(commentId);
    
    modifier = Telescope.callbacks.run("comments.edit.method", modifier, comment, Meteor.user());

    return Comments.methods.edit(commentId, modifier, comment);
  },

  /**
   * @summary Meteor method for deleting a comment
   * @memberof Comments
   * @isMethod true
   * @param {String} commentId - the id of the comment
   */
  'comments.deleteById': function (commentId) {

    check(commentId, String);
    
    var comment = Comments.findOne(commentId);
    var user = Meteor.user();

    if(Users.can.edit(user, comment)){

      // decrement post comment count and remove user ID from post
      Posts.update(comment.postId, {
        $inc:   {commentCount: -1},
        $pull:  {commenters: comment.userId}
      });

      // decrement user comment count and remove comment ID from user
      Meteor.users.update({_id: comment.userId}, {
        $inc:   {'telescope.commentCount': -1}
      });

      // note: should we also decrease user's comment karma ?
      // We don't actually delete the comment to avoid losing all child comments.
      // Instead, we give it a special flag
      Comments.update({_id: commentId}, {$set: {
        body: 'Deleted',
        htmlBody: 'Deleted',
        isDeleted: true
      }});

    }else{

      Messages.flash("You don't have permission to delete this comment.", "error");

    }
  },

  /**
   * @summary Upvote a comment
   * @memberof Comments
   * @isMethod true
   * @param {String} commentId - the id of the comment
   */
  'comments.upvote': function (commentId) {
    check(commentId, String);
    return Telescope.operateOnItem.call(this, Comments, commentId, Meteor.user(), "upvote");
  },

  /**
   * @summary Downvote a comment
   * @memberof Comments
   * @isMethod true
   * @param {String} commentId - the id of the comment
   */
  'comments.downvote': function (commentId) {
    check(commentId, String);
    return Telescope.operateOnItem.call(this, Comments, commentId, Meteor.user(), "downvote");
  },

  /**
   * @summary Cancel an upvote on a comment
   * @memberof Comments
   * @isMethod true
   * @param {String} commentId - the id of the comment
   */
  'comments.cancelUpvote': function (commentId) {
    check(commentId, String);
    return Telescope.operateOnItem.call(this, Comments, commentId, Meteor.user(), "cancelUpvote");
  },

  /**
   * @summary Cancel a downvote on a comment
   * @memberof Comments
   * @isMethod true
   * @param {String} commentId - the id of the comment
   */
  'comments.cancelDownvote': function (commentId) {
    check(commentId, String);
    return Telescope.operateOnItem.call(this, Comments, commentId, Meteor.user(), "cancelDownvote");
  }

});