/**
 * ChronoMind Backend — Fastify server entry point.
 *
 * Product-specific service for timers, routines, households, shared timers.
 * Common platform features (auth, billing, flags, etc.) come from platform-service.
 * Port: 4011 (configurable via PORT env var).
 */

import { createServiceApp, registerOptionalJwtContext, startService } from '@bytelyst/fastify-core';
import { timerRoutes } from './modules/timers/routes.js';
import { routineRoutes } from './modules/routines/routes.js';
import { householdRoutes } from './modules/households/routes.js';
import { sharedTimerRoutes } from './modules/shared-timers/routes.js';
import { webhookRoutes } from './modules/webhooks/routes.js';
import { initCosmosIfNeeded } from './lib/cosmos-init.js';
import { initDatastore } from './lib/datastore.js';
import { config } from './lib/config.js';
import { getAllFlags } from './lib/feature-flags.js';
import { getBufferedEvents, flushEvents } from './lib/telemetry.js';

import { jwtVerify } from 'jose';
import type { JwtPayload } from './lib/request-context.js';

const jwtSecret = new TextEncoder().encode(config.JWT_SECRET);

await initCosmosIfNeeded();
initDatastore();

const app = await createServiceApp({
  name: 'chronomind-backend',
  version: '0.1.0',
  description: 'ChronoMind product-specific backend — timers, routines, households, shared timers, webhooks',
  corsOrigin: config.CORS_ORIGIN,
  swagger: {
    title: 'ChronoMind Backend',
    description: 'Timers, routines, households, shared timers, webhooks',
    port: config.PORT,
  },
  metrics: true,
});

await registerOptionalJwtContext(app, {
  verifyToken: async (token: string) => {
    const { payload } = await jwtVerify(token, jwtSecret, { issuer: 'bytelyst-platform' });
    return payload as unknown as JwtPayload;
  },
});

await app.register(timerRoutes, { prefix: '/api' });
await app.register(routineRoutes, { prefix: '/api' });
await app.register(householdRoutes, { prefix: '/api' });
await app.register(sharedTimerRoutes, { prefix: '/api' });
await app.register(webhookRoutes, { prefix: '/api' });

// ── Diagnostics routes (no auth) ────────────────────────────────
app.get('/api/diagnostics/flags', async () => getAllFlags());
app.get('/api/diagnostics/telemetry', async () => ({ events: getBufferedEvents() }));
app.post('/api/diagnostics/telemetry/flush', async () => ({ flushed: flushEvents().length }));

await startService(app, { port: config.PORT, host: config.HOST });