"use strict";

const AJV = require("ajv");
const ajvInstance = new AJV();

const baseSchema = {
  $id: "http://example.com/schemas/base",
  definitions: {
    hello: { type: "string" },
  },
  type: "object",
  properties: {
    hello: { $ref: "#/definitions/hello" },
  },
};

const refSchema = {
  $id: "http://example.com/schemas/ref",
  type: "object",
  properties: {
    hello: { $ref: "http://example.com/schemas/base#/definitions/hello" },
  },
};

ajvInstance.addSchema(baseSchema);
ajvInstance.addSchema(refSchema);

/***********/

const fastify = require("fastify")({ logger: { level: "debug" } });
fastify.setValidatorCompiler(function ({ schema }) {
  return ajvInstance.compile(schema);
});

fastify.route({
  path: "/",
  method: "GET",
  schema: {
    response: {
      "2xx": ajvInstance.getSchema("http://example.com/schemas/ref").schema,
    },
  },
  handler(req, res) {
    res.send({ hello: "world" });
  },
});

fastify.inject({ url: "/" }, (err, response) => {
  if (err) throw err;

  console.log(response);
});