import type {
  AnalyticsAdapter,
  AnalyticsEvent,
  AliasPayload,
  GroupPayload,
  IdentifyPayload,
  ScreenEvent,
} from '../types';

export interface SegmentAdapterOptions {
  /**
   * Your Segment write key.
   * The adapter expects `@segment/analytics-react-native` to be installed
   * and its client passed in via `client`.
   */
  client: any;
}

/**
 * Segment adapter.
 *
 * Install peer dependency:
 *   npm install @segment/analytics-react-native
 *
 * Usage:
 *   import { createClient } from '@segment/analytics-react-native';
 *   const segmentClient = createClient({ writeKey: 'YOUR_KEY' });
 *   createAnalytics({ adapters: [createSegmentAdapter({ client: segmentClient })] });
 */
export function createSegmentAdapter(options: SegmentAdapterOptions): AnalyticsAdapter {
  const { client } = options;

  return {
    name: 'segment',

    async initialize() {
      // Segment client self-initializes; nothing needed here
    },

    async track(event: AnalyticsEvent) {
      await client.track(event.name, event.properties ?? {});
    },

    async screen(event: ScreenEvent) {
      await client.screen(event.name, event.properties ?? {});
    },

    async identify(payload: IdentifyPayload) {
      await client.identify(payload.userId, payload.traits ?? {});
    },

    async group(payload: GroupPayload) {
      await client.group(payload.groupId, payload.traits ?? {});
    },

    async alias(payload: AliasPayload) {
      await client.alias(payload.newId);
    },

    async reset() {
      await client.reset();
    },

    async flush() {
      await client.flush();
    },
  };
}