import { createServiceApp, registerOptionalJwtContext, startService } from '@bytelyst/fastify-core';
import { jwtVerify } from 'jose';
import { noteAgentActionRoutes } from './modules/note-agent-actions/routes.js';
import { noteArtifactRoutes } from './modules/note-artifacts/routes.js';
import { noteRoutes } from './modules/notes/routes.js';
import { noteRelationshipRoutes } from './modules/note-relationships/routes.js';
import { noteTaskRoutes } from './modules/note-tasks/routes.js';
import { savedViewRoutes } from './modules/saved-views/routes.js';
import { workspaceRoutes } from './modules/workspaces/routes.js';
import { initCosmosIfNeeded } from './lib/cosmos-init.js';
import { initEncryption } from './lib/field-encrypt.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 { DISPLAY_NAME, PRODUCT_ID, productConfig } from './lib/product-config.js';
import type { JwtPayload } from './lib/request-context.js';

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

await initCosmosIfNeeded();
initDatastore();

const app = await createServiceApp({
  name: config.SERVICE_NAME,
  version: '0.1.0',
  description: `${DISPLAY_NAME} product-specific backend — notes and workspaces`,
  corsOrigin: config.CORS_ORIGIN,
  swagger: {
    title: `${DISPLAY_NAME} Backend`,
    description: 'Notes and workspaces API',
    port: config.PORT,
  },
  metrics: true,
  readiness: true,
});

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

type RegisterablePlugin = Parameters<typeof app.register>[0];

async function registerApiPlugin(plugin: unknown) {
  await app.register(plugin as RegisterablePlugin, { prefix: '/api' });
}

await registerApiPlugin(noteAgentActionRoutes);
await registerApiPlugin(noteArtifactRoutes);
await registerApiPlugin(noteRoutes);
await registerApiPlugin(noteRelationshipRoutes);
await registerApiPlugin(noteTaskRoutes);
await registerApiPlugin(savedViewRoutes);
await registerApiPlugin(workspaceRoutes);

// ── Bootstrap (no auth) ──────────────────────────────────────────
app.get('/api/bootstrap', async () => ({
  productId: productConfig.productId,
  displayName: productConfig.displayName,
  backendPort: config.PORT,
}));

// ── 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 }));
app.get('/api/diagnostics/config', async () => ({
  productId: PRODUCT_ID,
  serviceName: config.SERVICE_NAME,
  port: config.PORT,
  nodeEnv: config.NODE_ENV,
  dbProvider: config.DB_PROVIDER,
  telemetryEnabled: config.TELEMETRY_ENABLED,
  featureFlagsEnabled: config.FEATURE_FLAGS_ENABLED,
}));

await initEncryption(PRODUCT_ID, app.log);

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