/*
 *    Copyright [2015] [wisemapping]
 *
 *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
 *   It is basically the Apache License, Version 2.0 (the "License") plus the
 *   "powered by wisemapping" text requirement on every single page;
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the license at
 *
 *       http://www.wisemapping.org/license
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
import ConnectionLine from '../ConnectionLine';

class RelationshipModel {
  constructor(sourceTopicId, targetTopicId) {
    $assert($defined(sourceTopicId), 'from node type can not be null');
    $assert($defined(targetTopicId), 'to node type can not be null');

    this._id = RelationshipModel._nextUUID();
    this._sourceTargetId = sourceTopicId;
    this._targetTopicId = targetTopicId;
    this._lineType = ConnectionLine.SIMPLE_CURVED;
    this._srcCtrlPoint = null;
    this._destCtrlPoint = null;
    this._endArrow = true;
    this._startArrow = false;
  }

  /** */
  getFromNode() {
    return this._sourceTargetId;
  }

  /** */
  getToNode() {
    return this._targetTopicId;
  }

  /** */
  getId() {
    $assert(this._id, 'id is null');
    return this._id;
  }

  /** */
  getLineType() {
    return this._lineType;
  }

  /** */
  setLineType(lineType) {
    this._lineType = lineType;
  }

  /** */
  getSrcCtrlPoint() {
    return this._srcCtrlPoint;
  }

  /** */
  setSrcCtrlPoint(srcCtrlPoint) {
    this._srcCtrlPoint = srcCtrlPoint;
  }

  /** */
  getDestCtrlPoint() {
    return this._destCtrlPoint;
  }

  /** */
  setDestCtrlPoint(destCtrlPoint) {
    this._destCtrlPoint = destCtrlPoint;
  }

  /** */
  getEndArrow() {
    return this._endArrow;
  }

  /** */
  setEndArrow(endArrow) {
    this._endArrow = endArrow;
  }

  /** */
  getStartArrow() {
    return this._startArrow;
  }

  /** */
  setStartArrow(startArrow) {
    this._startArrow = startArrow;
  }

  /**
       * @return a clone of the relationship model
       */
  clone() {
    const result = new RelationshipModel(this._sourceTargetId, this._targetTopicId);
    result._id = this._id;
    result._lineType = this._lineType;
    result._srcCtrlPoint = this._srcCtrlPoint;
    result._destCtrlPoint = this._destCtrlPoint;
    result._endArrow = this._endArrow;
    result._startArrow = this._startArrow;
    return result;
  }

  /**
       * @return {String} textual information about the relationship's source and target node
       */
  inspect() {
    return (
      `(fromNode:${this.getFromNode().getId()
      } , toNode: ${this.getToNode().getId()
      })`
    );
  }
}

function _nextUUID() {
  if (!$defined(RelationshipModel._uuid)) {
    RelationshipModel._uuid = 0;
  }
  RelationshipModel._uuid += 1;
  return RelationshipModel._uuid;
}

RelationshipModel._nextUUID = _nextUUID;

export default RelationshipModel;