import PostHog from 'posthog-react-native';

type AnalyticsProperties = Record<string, unknown>;

type SafeAnalytics = {
  capture: (event: string, properties?: AnalyticsProperties) => void;
  identify: (userId: string, properties?: AnalyticsProperties) => void;
  screen: (name: string, properties?: AnalyticsProperties) => void;
  reset: () => void;
};

const POSTHOG_API_KEY = (
  process.env.EXPO_PUBLIC_POSTHOG_API_KEY || 'phc_FX6HRgx9NSpS5moxjMF6xyc37yMwjoeu6TbWUqNNKlk'
).trim();
const POSTHOG_HOST = (process.env.EXPO_PUBLIC_POSTHOG_HOST || 'https://us.i.posthog.com').trim();

// Kein Provider im Layout — die Provider-Variante (Autocapture) hat frueher den
// App-Start zerlegt (siehe Commit "App chrash + seo"). Die Instanz laeuft rein in JS,
// scheitert die Initialisierung, bleibt client null und alle Aufrufe sind no-ops.
let client: PostHog | null = null;

try {
  if (POSTHOG_API_KEY.startsWith('phc_')) {
    client = new PostHog(POSTHOG_API_KEY, {
      host: POSTHOG_HOST,
      captureAppLifecycleEvents: true, // Application Opened/Backgrounded → DAU/WAU-Dashboards
    });
  }
} catch (error) {
  console.warn('[Analytics] PostHog initialization failed — analytics disabled.', error);
  client = null;
}

const safeAnalytics: SafeAnalytics = {
  capture: (event, properties) => {
    try {
      client?.capture(event, properties as Record<string, string>);
    } catch (error) {
      console.warn('[Analytics] capture failed', event, error);
    }
  },
  identify: (userId, properties) => {
    try {
      client?.identify(userId, properties as Record<string, string>);
    } catch (error) {
      console.warn('[Analytics] identify failed', error);
    }
  },
  screen: (name, properties) => {
    try {
      client?.screen(name, properties as Record<string, string>);
    } catch (error) {
      console.warn('[Analytics] screen failed', name, error);
    }
  },
  reset: () => {
    try {
      client?.reset();
    } catch (error) {
      console.warn('[Analytics] reset failed', error);
    }
  },
};

export const Analytics = safeAnalytics;

export const useSafeAnalytics = (): SafeAnalytics => safeAnalytics;