/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */
package org.elasticsearch.example.resthandler;

import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.Table;
import org.elasticsearch.rest.BytesRestResponse;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.cat.AbstractCatAction;
import org.elasticsearch.rest.action.cat.RestTable;

import java.util.List;

import static java.util.Arrays.asList;
import static java.util.Collections.unmodifiableList;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestRequest.Method.POST;

/**
 * Example of adding a cat action with a plugin.
 */
public class ExampleCatAction extends AbstractCatAction {

    @Override
    public List<Route> routes() {
        return unmodifiableList(asList(
            new Route(GET, "/_cat/example"),
            new Route(POST, "/_cat/example")));
    }

    @Override
    public String getName() {
        return "rest_handler_cat_example";
    }

    @Override
    protected RestChannelConsumer doCatRequest(final RestRequest request, final NodeClient client) {
        final String message = request.param("message", "Hello from Cat Example action");

        Table table = getTableWithHeader(request);
        table.startRow();
        table.addCell(message);
        table.endRow();
        return channel -> {
            try {
                channel.sendResponse(RestTable.buildResponse(table, channel));
            } catch (final Exception e) {
                channel.sendResponse(new BytesRestResponse(channel, e));
            }
        };
    }

    @Override
    protected void documentation(StringBuilder sb) {
        sb.append(documentation());
    }

    public static String documentation() {
        return "/_cat/example\n";
    }

    @Override
    protected Table getTableWithHeader(RestRequest request) {
        final Table table = new Table();
        table.startHeaders();
        table.addCell("test", "desc:test");
        table.endHeaders();
        return table;
    }
}
