'use strict';

const AJV = require('ajv');
const ajv = new AJV();

ajv.addSchema({
  $id: 'urn:schema:foo',
  definitions: {
    foo: { type: 'string' }
  },

  type: 'object',
  properties: {
    foo: { $ref: '#/definitions/foo' }
  }
});

ajv.addSchema({
  $id: 'urn:schema:response',
  type: 'object',
  properties: {
    bar: { $ref: 'urn:schema:foo' }
  }
});

const fastify = require('fastify')();
fastify.setSchemaCompiler(schema => ajv.compile(schema));
fastify.setSchemaResolver(name => ajv.getSchema(name).schema);

fastify.route({
  path: '/',
  method: 'GET',
  schema: {
    response: {
      '2xx': ajv.getSchema('urn:schema:response').schema
    }
  },
  handler(req, reply) {
    reply.send({ bar: { foo: 'bar' } });
  }
});

fastify.inject({ url: '/' }, (err, response) => {
  if (err) {
    throw err;
  }
  console.log(response.body);
});