import { logger } from '@storybook/client-logger';

import { getSourceType, ComposedRef } from '../modules/refs';
import { API } from '../index';

interface Meta {
  ref?: ComposedRef;
  source?: string;
  sourceType?: 'local' | 'external';
  sourceLocation?: string;
  refId?: string;
  v?: number;
  type: string;
}

export const getEventMetadata = (context: Meta, fullAPI: API) => {
  const { source, refId, type } = context;
  const [sourceType, sourceLocation] = getSourceType(source, refId);

  const ref =
    refId && fullAPI.getRefs()[refId] ? fullAPI.getRefs()[refId] : fullAPI.findRef(sourceLocation);

  const meta = {
    source,
    sourceType,
    sourceLocation,
    refId,
    ref,
    type,
  };

  switch (true) {
    case typeof refId === 'string':
    case sourceType === 'local':
    case sourceType === 'external': {
      return meta;
    }

    // if we couldn't find the source, something risky happened, we ignore the input, and log a warning
    default: {
      logger.warn(`Received a ${type} frame that was not configured as a ref`);
      return null;
    }
  }
};
