/*
 * Copyright 2019 Red Hat, Inc.
 *
 * Red Hat licenses this file to you under the Apache License, version 2.0
 * (the "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package io.vertx.ext.web.handler.graphql;

import graphql.GraphQL;
import graphql.schema.DataFetchingEnvironment;
import graphql.schema.GraphQLSchema;
import graphql.schema.idl.RuntimeWiring;
import graphql.schema.idl.SchemaGenerator;
import graphql.schema.idl.SchemaParser;
import graphql.schema.idl.TypeDefinitionRegistry;
import io.vertx.ext.web.WebTestBase;
import io.vertx.ext.web.handler.BodyHandler;

import static graphql.schema.idl.RuntimeWiring.newRuntimeWiring;
import static java.util.stream.Collectors.toList;

/**
 * @author Thomas Segismont
 */
public class GraphQLTestBase extends WebTestBase {

  protected TestData testData = new TestData();
  protected GraphQLHandler graphQLHandler;

  @Override
  public void setUp() throws Exception {
    super.setUp();
    router.route().handler(BodyHandler.create());
    graphQLHandler = GraphQLHandler.create(graphQL(), createOptions());
    router.route("/graphql").order(100).handler(graphQLHandler);
  }

  protected GraphQLHandlerOptions createOptions() {
    return new GraphQLHandlerOptions();
  }

  protected GraphQL graphQL() {
    String schema = vertx.fileSystem().readFileBlocking("links.graphqls").toString();

    SchemaParser schemaParser = new SchemaParser();
    TypeDefinitionRegistry typeDefinitionRegistry = schemaParser.parse(schema);

    RuntimeWiring runtimeWiring = newRuntimeWiring()
      .type("Query", builder -> builder.dataFetcher("allLinks", this::getAllLinks))
      .build();

    SchemaGenerator schemaGenerator = new SchemaGenerator();
    GraphQLSchema graphQLSchema = schemaGenerator.makeExecutableSchema(typeDefinitionRegistry, runtimeWiring);

    return GraphQL.newGraphQL(graphQLSchema)
      .build();
  }

  protected Object getAllLinks(DataFetchingEnvironment env) {
    boolean secureOnly = env.getArgument("secureOnly");
    return testData.links.stream()
      .filter(link -> !secureOnly || link.getUrl().startsWith("https://"))
      .map(link -> {
        if (env.getRoot() != null) {
          return new Link(link.getUrl(), env.getRoot().toString(), link.getUserId());
        } else {
          return link;
        }
      })
      .collect(toList());
  }
}
