import { Map as ImmutableMap } from 'immutable';

import { SET_BROWSER_SUPPORT, SET_SUBSCRIPTION, CLEAR_SUBSCRIPTION, SET_ALERTS } from '../actions/push_notifications';

const initialState = ImmutableMap({
  subscription: null,
  alerts: new ImmutableMap({
    follow: true,
    follow_request: true,
    favourite: true,
    reblog: true,
    mention: true,
    poll: true,
  }),
  isSubscribed: false,
  browserSupport: false,
});

export default function push_subscriptions(state = initialState, action) {
  switch (action.type) {
    case SET_SUBSCRIPTION:
      return state
        .set('subscription', new ImmutableMap({
          id: action.subscription.id,
          endpoint: action.subscription.endpoint,
        }))
        .set('alerts', new ImmutableMap(action.subscription.alerts))
        .set('isSubscribed', true);
    case SET_BROWSER_SUPPORT:
      return state.set('browserSupport', action.value);
    case CLEAR_SUBSCRIPTION:
      return initialState;
    case SET_ALERTS:
      return state.setIn(action.path, action.value);
    default:
      return state;
  }
}