import { select } from 'redux-saga/effects'

import { getCreatedSessions, getUpdatedSessions, getDeletedSessions } from './selectors';

import { ActionEnum } from '../constants';

import moment from 'moment';

import SessionRecord from '../store/sessionRecord';

import { doDeleteSession, loadSession, resetActionSession } from '../actions/sessionsActions';

import Immutable from 'immutable';

import SyncMixin from './BaseSyncronizer';

class SessionSyncBase {

  // local diffs (immutable)

  * getLocalDiffs() {

    return Immutable.Map({

      created: yield select(getCreatedSessions),

      updated: yield select(getUpdatedSessions),

      deleted: yield select(getDeletedSessions)

    })

  }

  // remote urls

  getRemoteLoadUrl() {

    return "/api/notes/sessions/";

  }

  getRemoteDeleteUrl(localObjInst) {

    return `/api/notes/sessions/${localObjInst.get('_id')}/`;

  }

  getRemoteCreateUrl(localObjInst) {

    return "/api/notes/sessions/";

  }

  getRemoteUpdateUrl(localObjInst) {

    return `/api/notes/sessions/${localObjInst.get('_id')}/`;

  }

  // build remote json message

  getRemoteData(localObjInst) {

    return {

      ext_id: localObjInst.get('_id'),

      date: localObjInst.get('date'),

      title: localObjInst.get('title'),

      description: localObjInst.get('description'),

      group: localObjInst.get('group'),

    };

  }

  getLocalRecord(remoteObj) {

    return SessionRecord({

        _id: remoteObj.ext_id,

        title: remoteObj.title,

        description: remoteObj.description,

        date: moment(remoteObj.date).toDate(),

        action: ActionEnum.NONE,

        group: remoteObj.group,

        protocol: remoteObj.protocol,

    });

  }

  // actions

  doDeleteLocalObj(localObjId) {

    return doDeleteSession(localObjId);

  }

  resetLocalObj(localObjInst) {

    return resetActionSession(localObjInst);

  }

  loadObj(objRecord) {

    return loadSession(objRecord);

  }

}

export class SessionSynchronizer extends SyncMixin(SessionSyncBase) {}

export default SessionSynchronizer;