/**
 * Data Sync Service - Sync raw MongoDB data to PostgreSQL master records
 */

// Framework imports
import { Hono } from 'hono';
import { cors } from 'hono/cors';
// Library imports
import { initializeServiceConfig } from '@stock-bot/config';
import { getLogger, setLoggerConfig, shutdownLoggers } from '@stock-bot/logger';
import { createAndConnectMongoDBClient, MongoDBClient } from '@stock-bot/mongodb-client';
import { createAndConnectPostgreSQLClient, PostgreSQLClient } from '@stock-bot/postgres-client';
import { Shutdown } from '@stock-bot/shutdown';
import { enhancedSyncManager } from './services/enhanced-sync-manager';
import { syncManager } from './services/sync-manager';
// Local imports
import { setMongoDBClient, setPostgreSQLClient } from './clients';
import { enhancedSyncRoutes, healthRoutes, statsRoutes, syncRoutes } from './routes';

// Initialize configuration with automatic monorepo config inheritance
const config = await initializeServiceConfig();
const serviceConfig = config.service;
const databaseConfig = config.database;

// Initialize logger with config
const loggingConfig = config.logging;
if (loggingConfig) {
  setLoggerConfig({
    logLevel: loggingConfig.level,
    logConsole: true,
    logFile: false,
    environment: config.environment,
  });
}

const app = new Hono();

// Add CORS middleware
app.use(
  '*',
  cors({
    origin: '*',
    allowMethods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'],
    allowHeaders: ['Content-Type', 'Authorization'],
    credentials: false,
  })
);

const logger = getLogger('data-sync-service');
const PORT = serviceConfig.port;
let server: ReturnType<typeof Bun.serve> | null = null;
let postgresClient: PostgreSQLClient | null = null;
let mongoClient: MongoDBClient | null = null;

// Initialize shutdown manager
const shutdown = Shutdown.getInstance({ timeout: 15000 });

// Mount routes
app.route('/health', healthRoutes);
app.route('/sync', syncRoutes);
app.route('/sync', enhancedSyncRoutes);
app.route('/sync/stats', statsRoutes);

// Initialize services
async function initializeServices() {
  logger.info('Initializing data sync service...');

  try {
    // Initialize MongoDB client
    logger.debug('Connecting to MongoDB...');
    const mongoConfig = databaseConfig.mongodb;
    mongoClient = await createAndConnectMongoDBClient({
      uri: mongoConfig.uri,
      database: mongoConfig.database,
      host: mongoConfig.host || 'localhost',
      port: mongoConfig.port || 27017,
      timeouts: {
        connectTimeout: 30000,
        socketTimeout: 30000,
        serverSelectionTimeout: 5000,
      },
    });
    setMongoDBClient(mongoClient);
    logger.info('MongoDB connected');

    // Initialize PostgreSQL client
    logger.debug('Connecting to PostgreSQL...');
    const pgConfig = databaseConfig.postgres;
    postgresClient = await createAndConnectPostgreSQLClient({
      host: pgConfig.host,
      port: pgConfig.port,
      database: pgConfig.database,
      username: pgConfig.user,
      password: pgConfig.password,
      poolSettings: {
        min: 2,
        max: pgConfig.poolSize || 10,
        idleTimeoutMillis: pgConfig.idleTimeout || 30000,
      },
    });
    setPostgreSQLClient(postgresClient);
    logger.info('PostgreSQL connected');

    // Initialize sync managers
    logger.debug('Initializing sync managers...');
    await syncManager.initialize();
    await enhancedSyncManager.initialize();
    logger.info('Sync managers initialized');

    logger.info('All services initialized successfully');
  } catch (error) {
    logger.error('Failed to initialize services', { error });
    throw error;
  }
}

// Start server
async function startServer() {
  await initializeServices();

  server = Bun.serve({
    port: PORT,
    fetch: app.fetch,
    development: config.environment === 'development',
  });

  logger.info(`Data Sync Service started on port ${PORT}`);
}

// Register shutdown handlers
shutdown.onShutdown(async () => {
  if (server) {
    logger.info('Stopping HTTP server...');
    try {
      server.stop();
      logger.info('HTTP server stopped');
    } catch (error) {
      logger.error('Error stopping HTTP server', { error });
    }
  }
});

shutdown.onShutdown(async () => {
  logger.info('Shutting down sync managers...');
  try {
    await syncManager.shutdown();
    await enhancedSyncManager.shutdown();
    logger.info('Sync managers shut down');
  } catch (error) {
    logger.error('Error shutting down sync managers', { error });
  }
});

shutdown.onShutdown(async () => {
  logger.info('Disconnecting from databases...');
  try {
    if (mongoClient) {
      await mongoClient.disconnect();
    }
    if (postgresClient) {
      await postgresClient.disconnect();
    }
    logger.info('Database connections closed');
  } catch (error) {
    logger.error('Error closing database connections', { error });
  }
});

shutdown.onShutdown(async () => {
  try {
    await shutdownLoggers();
    // process.stdout.write('Data sync service loggers shut down\n');
  } catch (error) {
    process.stderr.write(`Error shutting down loggers: ${error}\n`);
  }
});

// Start the service
startServer().catch(error => {
  logger.fatal('Failed to start data sync service', { error });
  process.exit(1);
});

logger.info('Data sync service startup initiated');