'use strict';

// Simulated Fastify route registration for template injection.
function buildServer() {
  const routes = {};
  return {
    post(path, handler) {
      routes[`POST ${path}`] = handler;
    },
    inject(method, path, payload) {
      const key = `${method} ${path}`;
      const handler = routes[key];
      if (!handler) return { status: 404, body: 'not found' };
      return handler({ body: payload });
    }
  };
}

function createServer() {
  const server = buildServer();
  server.post('/api/render', (req) => {
    const template = req?.body?.template;
    if (typeof template !== 'string') {
      return { status: 400, body: 'bad request' };
    }
    const compiled = template.replace('{{user}}', 'guest');
    // Sink: writes rendered content to log (simulated SSR)
    return { status: 200, body: compiled };
  });
  return server;
}

module.exports = { createServer };