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/*
 * 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.rest.action.admin.indices;

import org.elasticsearch.action.admin.indices.template.post.SimulateIndexTemplateAction;
import org.elasticsearch.action.admin.indices.template.post.SimulateIndexTemplateRequest;
import org.elasticsearch.action.admin.indices.template.put.PutComposableIndexTemplateAction;
import org.elasticsearch.client.internal.node.NodeClient;
import org.elasticsearch.cluster.metadata.ComposableIndexTemplate;
import org.elasticsearch.cluster.metadata.DataLifecycle;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.Scope;
import org.elasticsearch.rest.ServerlessScope;
import org.elasticsearch.rest.action.RestToXContentListener;

import java.io.IOException;
import java.util.List;

import static org.elasticsearch.rest.RestRequest.Method.POST;

@ServerlessScope(Scope.PUBLIC)
public class RestSimulateIndexTemplateAction extends BaseRestHandler {

    @Override
    public List routes() {
        return List.of(new Route(POST, "/_index_template/_simulate_index/{name}"));
    }

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

    @Override
    public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
        SimulateIndexTemplateRequest simulateIndexTemplateRequest = new SimulateIndexTemplateRequest(request.param("name"));
        simulateIndexTemplateRequest.masterNodeTimeout(
            request.paramAsTime("master_timeout", simulateIndexTemplateRequest.masterNodeTimeout())
        );
        if (DataLifecycle.isEnabled()) {
            simulateIndexTemplateRequest.includeDefaults(request.paramAsBoolean("include_defaults", false));
        }
        if (request.hasContent()) {
            PutComposableIndexTemplateAction.Request indexTemplateRequest = new PutComposableIndexTemplateAction.Request(
                "simulating_template"
            );
            indexTemplateRequest.indexTemplate(ComposableIndexTemplate.parse(request.contentParser()));
            indexTemplateRequest.create(request.paramAsBoolean("create", false));
            indexTemplateRequest.cause(request.param("cause", "api"));

            simulateIndexTemplateRequest.indexTemplateRequest(indexTemplateRequest);
        }

        return channel -> client.execute(
            SimulateIndexTemplateAction.INSTANCE,
            simulateIndexTemplateRequest,
            new RestToXContentListener<>(channel)
        );
    }
}