import fastify from 'fastify';
import { config } from '@config/index.js';
import { setupAuthHooks } from '@core/auth/middleware.js';
import { sessionRepository } from '@core/storage/repositories/sessions.js';
import { scrapeQueueRepository } from '@core/storage/repositories/scrapeQueue.js';
import { channelRepository } from '@core/storage/repositories/channels.js';
import { userRepository } from '@core/storage/repositories/users.js';
import { voteRepository } from '@core/storage/repositories/votes.js';
import { banRepository } from '@core/storage/repositories/bans.js';
import { logRepository } from '@core/storage/repositories/logs.js';

// Import routes
import { authRoutes } from '@modules/auth/routes.js';
import { channelRoutes } from '@modules/channels/routes.js';
import { searchRoutes } from '@modules/search/routes.js';
import { userRoutes } from '@modules/user/routes.js';
import { adminRoutes } from '@modules/admin/routes.js';

async function buildApp() {
  const app = fastify({
    logger: {
      level: config.LOG_LEVEL,
      transport: config.NODE_ENV === 'development' ? { target: 'pino-pretty' } : undefined,
    },
    trustProxy: true,
  });

  // Register plugins
  await app.register(import('@fastify/cookie'), {
    secret: config.SESSION_SECRET,
    parseOptions: {},
  });

  await app.register(import('@fastify/session'), {
    secret: config.SESSION_SECRET,
    cookie: {
      secure: config.NODE_ENV === 'production',
      httpOnly: true,
      sameSite: 'lax',
      maxAge: config.sessionTtlMs,
      path: '/',
    },
    saveUninitialized: false,
    rolling: true,
    store: {
      get: async (sid: string) => {
        const session = await sessionRepository.findValidSession(sid);
        return session?.data || null;
      },
      set: async (sid: string, data: Record<string, unknown>, ttl: number) => {
        // Handled by sessionRepository
      },
      destroy: async (sid: string) => {
        await sessionRepository.deleteSession(sid);
      },
    },
  });

  await app.register(import('@fastify/csrf-protection'), {
    sessionPlugin: '@fastify/session',
    cookieOpts: { signed: true },
  });

  await app.register(import('@fastify/rate-limit'), {
    max: 100,
    timeWindow: '1 minute',
    keyGenerator: (req) => req.ip,
  });

  await app.register(import('@fastify/helmet'), {
    contentSecurityPolicy: {
      directives: {
        defaultSrc: ["'self'"],
        scriptSrc: ["'self'", "'unsafe-inline'"],
        styleSrc: ["'self'", "'unsafe-inline'", 'https://fonts.googleapis.com'],
        fontSrc: ["'self'", 'https://fonts.gstatic.com'],
        imgSrc: ["'self'", 'data:', 'https:'],
        connectSrc: ["'self'"],
      },
    },
  });

  await app.register(import('@fastify/static'), {
    root: './public',
    prefix: '/public/',
  });

  await app.register(import('@fastify/view'), {
    engine: {
      nunjucks: await import('nunjucks'),
    },
    templates: './src/views',
    options: {
      autoescape: true,
      noCache: config.NODE_ENV === 'development',
    },
  });

  // Initialize repositories
  await Promise.all([
    userRepository.initialize(),
    channelRepository.initialize(),
    voteRepository.initialize(),
    banRepository.initialize(),
    logRepository.initialize(),
    sessionRepository.initialize(),
    scrapeQueueRepository.initialize(),
  ]);

  // Setup auth hooks
  setupAuthHooks(app);

  // Health check
  app.get('/health', async () => ({ status: 'ok', timestamp: new Date().toISOString() }));

  // Register modules
  await app.register(authRoutes, { prefix: '/auth' });
  await app.register(channelRoutes, { prefix: '/channels' });
  await app.register(searchRoutes, { prefix: '/' });
  await app.register(userRoutes, { prefix: '/user' });
  await app.register(adminRoutes, { prefix: '/admin' });

  // 404 handler
  app.setNotFoundHandler(async (request, reply) => {
    return reply.status(404).view('pages/404.njk', { url: request.url });
  });

  // Error handler
  app.setErrorHandler(async (error, request, reply) => {
    request.log.error(error);
    await logRepository.log({
      level: 'error',
      message: error.message,
      context: { url: request.url, method: request.method },
      error: { name: error.name, message: error.message, stack: error.stack },
      userId: request.user?.id,
      ip: request.ip,
      userAgent: request.headers['user-agent'],
      url: request.url,
      method: request.method,
      statusCode: error.statusCode || 500,
    });

    const statusCode = error.statusCode || 500;
    return reply.status(statusCode).view('pages/error.njk', {
      error: config.NODE_ENV === 'development' ? error.message : 'Internal Server Error',
      statusCode,
    });
  });

  return app;
}

async function start() {
  try {
    const app = await buildApp();
    await app.listen({ port: config.PORT, host: '0.0.0.0' });
    console.log(`🚀 Server running at ${config.APP_URL}`);
  } catch (err) {
    console.error('Failed to start server:', err);
    process.exit(1);
  }
}

if (import.meta.url === `file://${process.argv[1]}`) {
  start();
}

export { buildApp };