/*
 * 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", the "GNU Affero General Public License v3.0 only", 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", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.script.mustache;

import org.elasticsearch.action.ActionType;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.IndexScopedSettings;
import org.elasticsearch.common.settings.Setting;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.settings.SettingsFilter;
import org.elasticsearch.features.NodeFeature;
import org.elasticsearch.plugins.ActionPlugin;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.plugins.ScriptPlugin;
import org.elasticsearch.plugins.SearchPlugin;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestHandler;
import org.elasticsearch.script.ScriptContext;
import org.elasticsearch.script.ScriptEngine;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.function.Predicate;
import java.util.function.Supplier;

public class MustachePlugin extends Plugin implements ScriptPlugin, ActionPlugin, SearchPlugin {

    public static final ActionType<SearchTemplateResponse> SEARCH_TEMPLATE_ACTION = new ActionType<>("indices:data/read/search/template");
    public static final ActionType<MultiSearchTemplateResponse> MULTI_SEARCH_TEMPLATE_ACTION = new ActionType<>(
        "indices:data/read/msearch/template"
    );

    @Override
    public ScriptEngine getScriptEngine(Settings settings, Collection<ScriptContext<?>> contexts) {
        return new MustacheScriptEngine(settings);
    }

    @Override
    public List<ActionHandler> getActions() {
        return Arrays.asList(
            new ActionHandler(SEARCH_TEMPLATE_ACTION, TransportSearchTemplateAction.class),
            new ActionHandler(MULTI_SEARCH_TEMPLATE_ACTION, TransportMultiSearchTemplateAction.class)
        );
    }

    @Override
    public List<RestHandler> getRestHandlers(
        Settings settings,
        NamedWriteableRegistry namedWriteableRegistry,
        RestController restController,
        ClusterSettings clusterSettings,
        IndexScopedSettings indexScopedSettings,
        SettingsFilter settingsFilter,
        IndexNameExpressionResolver indexNameExpressionResolver,
        Supplier<DiscoveryNodes> nodesInCluster,
        Predicate<NodeFeature> clusterSupportsFeature
    ) {
        return Arrays.asList(
            new RestSearchTemplateAction(clusterSupportsFeature),
            new RestMultiSearchTemplateAction(settings),
            new RestRenderSearchTemplateAction()
        );
    }

    @Override
    public List<Setting<?>> getSettings() {
        return List.of(MustacheScriptEngine.MUSTACHE_RESULT_SIZE_LIMIT);
    }
}