import {BehaviorSubject} from 'rxjs/BehaviorSubject';
import {Squad} from '../../models/model-interfaces';

export const LOAD = 'LOAD';
export const ADD = 'ADD';
export const EDIT = 'EDIT';
export const REMOVE = 'REMOVE';

export class SquadStore {

  private squads: Squad[] = [];

  items$ = new BehaviorSubject<Squad[]>([]);

  dispatch(action) {
    this.squads = this._reduce(this.squads, action);
    this.items$.next(this.squads);
  }

  _reduce(squads: Squad[], action) {
    switch (action.type) {
      case LOAD:
        return [...action.data];
      case ADD:
        return [...squads, action.data];
      case EDIT:
        return squads.map(squad => {
          const editedSquad = action.data;
          if (squad._id !== editedSquad._id) {
            return squad;
          }
          return editedSquad;
        });
      case REMOVE:
        return squads.filter(squad => squad._id !== action.data._id);
      default:
        return squads;
    }
  }

}