CardComments = new Mongo.Collection('card_comments');

/**
 * A comment on a card
 */
CardComments.attachSchema(new SimpleSchema({
  boardId: {
    /**
     * the board ID
     */
    type: String,
  },
  cardId: {
    /**
     * the card ID
     */
    type: String,
  },
  // XXX Rename in `content`? `text` is a bit vague...
  text: {
    /**
     * the text of the comment
     */
    type: String,
  },
  // XXX We probably don't need this information here, since we already have it
  // in the associated comment creation activity
  createdAt: {
    /**
     * when was the comment created
     */
    type: Date,
    denyUpdate: false,
    autoValue() { // eslint-disable-line consistent-return
      if (this.isInsert) {
        return new Date();
      } else {
        this.unset();
      }
    },
  },
  // XXX Should probably be called `authorId`
  userId: {
    /**
     * the author ID of the comment
     */
    type: String,
    autoValue() { // eslint-disable-line consistent-return
      if (this.isInsert && !this.isSet) {
        return this.userId;
      }
    },
  },
}));

CardComments.allow({
  insert(userId, doc) {
    return allowIsBoardMember(userId, Boards.findOne(doc.boardId));
  },
  update(userId, doc) {
    return userId === doc.userId;
  },
  remove(userId, doc) {
    return userId === doc.userId;
  },
  fetch: ['userId', 'boardId'],
});

CardComments.helpers({
  copy(newCardId) {
    this.cardId = newCardId;
    delete this._id;
    CardComments.insert(this);
  },

  user() {
    return Users.findOne(this.userId);
  },
});

CardComments.hookOptions.after.update = { fetchPrevious: false };

function commentCreation(userId, doc){
  Activities.insert({
    userId,
    activityType: 'addComment',
    boardId: doc.boardId,
    cardId: doc.cardId,
    commentId: doc._id,
  });
}

if (Meteor.isServer) {
  // Comments are often fetched within a card, so we create an index to make these
  // queries more efficient.
  Meteor.startup(() => {
    CardComments._collection._ensureIndex({ cardId: 1, createdAt: -1 });
  });

  CardComments.after.insert((userId, doc) => {
    commentCreation(userId, doc);
  });

  CardComments.after.remove((userId, doc) => {
    const activity = Activities.findOne({ commentId: doc._id });
    if (activity) {
      Activities.remove(activity._id);
    }
  });
}

//CARD COMMENT REST API
if (Meteor.isServer) {
  /**
   * @operation get_all_comments
   * @summary Get all comments attached to a card
   *
   * @param {string} boardId the board ID of the card
   * @param {string} cardId the ID of the card
   * @return_type [{_id: string,
   *                comment: string,
   *                authorId: string}]
   */
  JsonRoutes.add('GET', '/api/boards/:boardId/cards/:cardId/comments', function (req, res) {
    try {
      Authentication.checkUserId( req.userId);
      const paramBoardId = req.params.boardId;
      const paramCardId = req.params.cardId;
      JsonRoutes.sendResult(res, {
        code: 200,
        data: CardComments.find({ boardId: paramBoardId, cardId: paramCardId}).map(function (doc) {
          return {
            _id: doc._id,
            comment: doc.text,
            authorId: doc.userId,
          };
        }),
      });
    }
    catch (error) {
      JsonRoutes.sendResult(res, {
        code: 200,
        data: error,
      });
    }
  });

  /**
   * @operation get_comment
   * @summary Get a comment on a card
   *
   * @param {string} boardId the board ID of the card
   * @param {string} cardId the ID of the card
   * @param {string} commentId the ID of the comment to retrieve
   * @return_type CardComments
   */
  JsonRoutes.add('GET', '/api/boards/:boardId/cards/:cardId/comments/:commentId', function (req, res) {
    try {
      Authentication.checkUserId( req.userId);
      const paramBoardId = req.params.boardId;
      const paramCommentId = req.params.commentId;
      const paramCardId = req.params.cardId;
      JsonRoutes.sendResult(res, {
        code: 200,
        data: CardComments.findOne({ _id: paramCommentId, cardId: paramCardId, boardId: paramBoardId }),
      });
    }
    catch (error) {
      JsonRoutes.sendResult(res, {
        code: 200,
        data: error,
      });
    }
  });

  /**
   * @operation new_comment
   * @summary Add a comment on a card
   *
   * @param {string} boardId the board ID of the card
   * @param {string} cardId the ID of the card
   * @param {string} authorId the user who 'posted' the comment
   * @param {string} text the content of the comment
   * @return_type {_id: string}
   */
  JsonRoutes.add('POST', '/api/boards/:boardId/cards/:cardId/comments', function (req, res) {
    try {
      Authentication.checkUserId( req.userId);
      const paramBoardId = req.params.boardId;
      const paramCardId = req.params.cardId;
      const id = CardComments.direct.insert({
        userId: req.body.authorId,
        text: req.body.comment,
        cardId: paramCardId,
        boardId: paramBoardId,
      });

      JsonRoutes.sendResult(res, {
        code: 200,
        data: {
          _id: id,
        },
      });

      const cardComment = CardComments.findOne({_id: id, cardId:paramCardId, boardId: paramBoardId });
      commentCreation(req.body.authorId, cardComment);
    }
    catch (error) {
      JsonRoutes.sendResult(res, {
        code: 200,
        data: error,
      });
    }
  });

  /**
   * @operation delete_comment
   * @summary Delete a comment on a card
   *
   * @param {string} boardId the board ID of the card
   * @param {string} cardId the ID of the card
   * @param {string} commentId the ID of the comment to delete
   * @return_type {_id: string}
   */
  JsonRoutes.add('DELETE', '/api/boards/:boardId/cards/:cardId/comments/:commentId', function (req, res) {
    try {
      Authentication.checkUserId( req.userId);
      const paramBoardId = req.params.boardId;
      const paramCommentId = req.params.commentId;
      const paramCardId = req.params.cardId;
      CardComments.remove({ _id: paramCommentId, cardId: paramCardId, boardId: paramBoardId });
      JsonRoutes.sendResult(res, {
        code: 200,
        data: {
          _id: paramCardId,
        },
      });
    }
    catch (error) {
      JsonRoutes.sendResult(res, {
        code: 200,
        data: error,
      });
    }
  });
}