/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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 org.elasticsearch.action.admin.indices.mapping.get;

import org.elasticsearch.action.ActionRequest;
import org.elasticsearch.action.ActionRequestValidationException;
import org.elasticsearch.action.IndicesRequest;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.action.support.master.MasterNodeOperationRequest;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.unit.TimeValue;

import java.io.IOException;

/** Request the mappings of specific fields */
public class GetFieldMappingsRequest extends ActionRequest<GetFieldMappingsRequest> implements IndicesRequest.Replaceable {

    protected boolean local = false;

    private String[] fields = Strings.EMPTY_ARRAY;

    private boolean includeDefaults = false;

    private String[] indices = Strings.EMPTY_ARRAY;
    private String[] types = Strings.EMPTY_ARRAY;

    private IndicesOptions indicesOptions = IndicesOptions.strictExpandOpen();

    public GetFieldMappingsRequest() {

    }

    public GetFieldMappingsRequest(GetFieldMappingsRequest other) {
        this.local = other.local;
        this.includeDefaults = other.includeDefaults;
        this.indices = other.indices;
        this.types = other.types;
        this.indicesOptions = other.indicesOptions;
        this.fields = other.fields;
    }

    /**
     * Indicate whether the receiving node should operate based on local index information or forward requests,
     * where needed, to other nodes. If running locally, request will not raise errors if running locally & missing indices.
     */
    public GetFieldMappingsRequest local(boolean local) {
        this.local = local;
        return this;
    }

    public boolean local() {
        return local;
    }

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

    public GetFieldMappingsRequest types(String... types) {
        this.types = types;
        return this;
    }

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

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

    public String[] types() {
        return types;
    }

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

    /** @param fields a list of fields to retrieve the mapping for */
    public GetFieldMappingsRequest fields(String... fields) {
        this.fields = fields;
        return this;
    }

    public String[] fields() {
        return fields;
    }

    public boolean includeDefaults() {
        return includeDefaults;
    }

    /** Indicates whether default mapping settings should be returned */
    public GetFieldMappingsRequest includeDefaults(boolean includeDefaults) {
        this.includeDefaults = includeDefaults;
        return this;
    }

    @Override
    public ActionRequestValidationException validate() {
        return null;
    }

    @Override
    public void writeTo(StreamOutput out) throws IOException {
        super.writeTo(out);
        // This request used to inherit from MasterNodeOperationRequest, so for bwc we need to keep serializing it.
        MasterNodeOperationRequest.DEFAULT_MASTER_NODE_TIMEOUT.writeTo(out);
        out.writeStringArray(indices);
        out.writeStringArray(types);
        indicesOptions.writeIndicesOptions(out);
        out.writeBoolean(local);
        out.writeStringArray(fields);
        out.writeBoolean(includeDefaults);
    }

    @Override
    public void readFrom(StreamInput in) throws IOException {
        super.readFrom(in);
        // This request used to inherit from MasterNodeOperationRequest, so for bwc we need to keep serializing it.
        TimeValue.readTimeValue(in);
        indices = in.readStringArray();
        types = in.readStringArray();
        indicesOptions = IndicesOptions.readIndicesOptions(in);
        local = in.readBoolean();
        fields = in.readStringArray();
        includeDefaults = in.readBoolean();
    }
}
