import { Middleware, Store, Dispatch } from 'redux';
import Raven from 'raven-js';

const loggerKey = '[redux-raven-middleware]';

export default (dsn, config = {}) => {
  if (!Raven.isSetup()) {
    if (!dsn) {
      // skip this middleware if there is no DSN (Data Source Name).
      console.error(`${loggerKey} Sentry DSN required.`);
      return store => next => action => next(action);
    }
    Raven.config(dsn, config).install();
  }

  return ({ getState }: Store) => (next: Dispatch) => (action: any): any => {
    const state: IAppState = getState();
    try {
      return next(action);
    } catch (err) {
      try {
        const { authentication, settings: { endpoint } } = state;

        if (authentication.isAuthenticated && authentication.user) {
          Raven.setUserContext({ email: authentication.user.email });
        } else {
          Raven.setUserContext();
        }

        (Raven as any).setExtraContext({ disco_api_endpoint: endpoint });
      } catch (fatalErr) {
        console.error(`Unexpected fatal error in Raven middleware: ${fatalErr}`);
      }

      console.error(`${loggerKey} Reporting error to Sentry:`, err);

      // Send the report.
      Raven.captureException(err, { extra: { action, state } });
    }
  }
}



/** WEBPACK FOOTER **
 ** ./~/tslint-loader!./src/app/store/middleware/raven.ts
 **/