/*
 * 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.action.datastreams.lifecycle;

import org.elasticsearch.action.ActionType;
import org.elasticsearch.action.IndicesRequest;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.action.support.master.AcknowledgedRequest;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
import org.elasticsearch.cluster.metadata.DataStreamLifecycle;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.core.Nullable;
import org.elasticsearch.core.TimeValue;
import org.elasticsearch.xcontent.AbstractObjectParser;
import org.elasticsearch.xcontent.ConstructingObjectParser;
import org.elasticsearch.xcontent.ObjectParser;
import org.elasticsearch.xcontent.ToXContentObject;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.xcontent.XContentParser;

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

import static org.elasticsearch.cluster.metadata.DataStreamLifecycle.DATA_RETENTION_FIELD;
import static org.elasticsearch.cluster.metadata.DataStreamLifecycle.DOWNSAMPLING_FIELD;
import static org.elasticsearch.cluster.metadata.DataStreamLifecycle.ENABLED_FIELD;

/**
 * Sets the data stream lifecycle that was provided in the request to the requested data streams.
 */
public class PutDataStreamLifecycleAction {

    public static final ActionType<AcknowledgedResponse> INSTANCE = new ActionType<>("indices:admin/data_stream/lifecycle/put");

    private PutDataStreamLifecycleAction() {/* no instances */}

    public static final class Request extends AcknowledgedRequest<Request> implements IndicesRequest.Replaceable, ToXContentObject {

        public interface Factory {
            Request create(
                @Nullable TimeValue dataRetention,
                @Nullable Boolean enabled,
                @Nullable List<DataStreamLifecycle.DownsamplingRound> downsampling
            );
        }

        @SuppressWarnings("unchecked")
        public static final ConstructingObjectParser<Request, Factory> PARSER = new ConstructingObjectParser<>(
            "put_data_stream_lifecycle_request",
            false,
            (args, factory) -> factory.create((TimeValue) args[0], (Boolean) args[1], (List<DataStreamLifecycle.DownsamplingRound>) args[2])
        );

        static {
            PARSER.declareField(
                ConstructingObjectParser.optionalConstructorArg(),
                (p, c) -> TimeValue.parseTimeValue(p.text(), DATA_RETENTION_FIELD.getPreferredName()),
                DATA_RETENTION_FIELD,
                ObjectParser.ValueType.STRING
            );
            PARSER.declareBoolean(ConstructingObjectParser.optionalConstructorArg(), ENABLED_FIELD);
            PARSER.declareField(
                ConstructingObjectParser.optionalConstructorArg(),
                (p, c) -> AbstractObjectParser.parseArray(p, null, DataStreamLifecycle.DownsamplingRound::fromXContent),
                DOWNSAMPLING_FIELD,
                ObjectParser.ValueType.OBJECT_ARRAY
            );
        }

        public static Request parseRequest(XContentParser parser, Factory factory) {
            return PARSER.apply(parser, factory);
        }

        private String[] names;
        private IndicesOptions indicesOptions = IndicesOptions.builder()
            .concreteTargetOptions(IndicesOptions.ConcreteTargetOptions.ERROR_WHEN_UNAVAILABLE_TARGETS)
            .wildcardOptions(
                IndicesOptions.WildcardOptions.builder()
                    .matchOpen(true)
                    .matchClosed(true)
                    .includeHidden(false)
                    .resolveAliases(false)
                    .allowEmptyExpressions(true)
                    .build()
            )
            .gatekeeperOptions(
                IndicesOptions.GatekeeperOptions.builder()
                    .allowAliasToMultipleIndices(false)
                    .allowClosedIndices(true)
                    .ignoreThrottled(false)
                    .allowSelectors(false)
                    .build()
            )
            .build();
        private final DataStreamLifecycle lifecycle;

        public Request(StreamInput in) throws IOException {
            super(in);
            this.names = in.readStringArray();
            this.indicesOptions = IndicesOptions.readIndicesOptions(in);
            lifecycle = new DataStreamLifecycle(in);
        }

        @Override
        public void writeTo(StreamOutput out) throws IOException {
            super.writeTo(out);
            out.writeStringArray(names);
            indicesOptions.writeIndicesOptions(out);
            out.writeWriteable(lifecycle);
        }

        public Request(TimeValue masterNodeTimeout, TimeValue ackTimeout, String[] names, @Nullable TimeValue dataRetention) {
            this(masterNodeTimeout, ackTimeout, names, dataRetention, null, null);
        }

        public Request(TimeValue masterNodeTimeout, TimeValue ackTimeout, String[] names, DataStreamLifecycle lifecycle) {
            super(masterNodeTimeout, ackTimeout);
            this.names = names;
            this.lifecycle = lifecycle;
        }

        public Request(
            TimeValue masterNodeTimeout,
            TimeValue ackTimeout,
            String[] names,
            @Nullable TimeValue dataRetention,
            @Nullable Boolean enabled
        ) {
            this(masterNodeTimeout, ackTimeout, names, dataRetention, enabled, null);
        }

        public Request(
            TimeValue masterNodeTimeout,
            TimeValue ackTimeout,
            String[] names,
            @Nullable TimeValue dataRetention,
            @Nullable Boolean enabled,
            @Nullable List<DataStreamLifecycle.DownsamplingRound> downsampling
        ) {
            super(masterNodeTimeout, ackTimeout);
            this.names = names;
            this.lifecycle = DataStreamLifecycle.dataLifecycleBuilder()
                .dataRetention(dataRetention)
                .enabled(enabled == null || enabled)
                .downsampling(downsampling)
                .build();
        }

        public String[] getNames() {
            return names;
        }

        public DataStreamLifecycle getLifecycle() {
            return lifecycle;
        }

        @Override
        public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
            builder.startObject();
            builder.field("lifecycle", lifecycle);
            builder.endObject();
            return builder;
        }

        @Override
        public String[] indices() {
            return names;
        }

        @Override
        public IndicesOptions indicesOptions() {
            return indicesOptions;
        }

        public Request indicesOptions(IndicesOptions indicesOptions) {
            this.indicesOptions = indicesOptions;
            return this;
        }

        @Override
        public boolean includeDataStreams() {
            return true;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;
            Request request = (Request) o;
            return Arrays.equals(names, request.names)
                && Objects.equals(indicesOptions, request.indicesOptions)
                && lifecycle.equals(request.lifecycle);
        }

        @Override
        public int hashCode() {
            int result = Objects.hash(indicesOptions, lifecycle);
            result = 31 * result + Arrays.hashCode(names);
            return result;
        }

        @Override
        public IndicesRequest indices(String... names) {
            this.names = names;
            return this;
        }
    }
}