/*
 * 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.delete;

import org.elasticsearch.action.ActionRequestValidationException;
import org.elasticsearch.action.IndicesRequest;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.action.support.master.AcknowledgedRequest;
import org.elasticsearch.action.support.master.MasterNodeOperationRequest;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.util.CollectionUtils;

import java.io.IOException;

import static org.elasticsearch.action.ValidateActions.addValidationError;
import static org.elasticsearch.common.unit.TimeValue.readTimeValue;

/**
 * A request to delete an index. Best created with {@link org.elasticsearch.client.Requests#deleteIndexRequest(String)}.
 */
public class DeleteIndexRequest extends MasterNodeOperationRequest<DeleteIndexRequest> implements IndicesRequest.Replaceable {

    private String[] indices;
    // Delete index should work by default on both open and closed indices.
    private IndicesOptions indicesOptions = IndicesOptions.fromOptions(false, true, true, true);
    private TimeValue timeout = AcknowledgedRequest.DEFAULT_ACK_TIMEOUT;

    DeleteIndexRequest() {
    }

    /**
     * Constructs a new delete index request for the specified index.
     *
     * @param index The index to delete. Use "_all" to delete all indices.
     */
    public DeleteIndexRequest(String index) {
        this.indices = new String[]{index};
    }

    /**
     * Constructs a new delete index request for the specified indices.
     *
     * @param indices The indices to delete. Use "_all" to delete all indices.
     */
    public DeleteIndexRequest(String... indices) {
        this.indices = indices;
    }

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

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

    @Override
    public ActionRequestValidationException validate() {
        ActionRequestValidationException validationException = null;
        if (CollectionUtils.isEmpty(indices)) {
            validationException = addValidationError("index / indices is missing", validationException);
        }
        return validationException;
    }

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

    /**
     * The index to delete.
     */
    @Override
    public String[] indices() {
        return indices;
    }

    /**
     * Timeout to wait for the index deletion to be acknowledged by current cluster nodes. Defaults
     * to <tt>10s</tt>.
     */
    public TimeValue timeout() {
        return timeout;
    }

    /**
     * Timeout to wait for the index deletion to be acknowledged by current cluster nodes. Defaults
     * to <tt>10s</tt>.
     */
    public DeleteIndexRequest timeout(TimeValue timeout) {
        this.timeout = timeout;
        return this;
    }

    /**
     * Timeout to wait for the index deletion to be acknowledged by current cluster nodes. Defaults
     * to <tt>10s</tt>.
     */
    public DeleteIndexRequest timeout(String timeout) {
        return timeout(TimeValue.parseTimeValue(timeout, null));
    }

    @Override
    public void readFrom(StreamInput in) throws IOException {
        super.readFrom(in);
        indices = in.readStringArray();
        indicesOptions = IndicesOptions.readIndicesOptions(in);
        timeout = readTimeValue(in);
    }

    @Override
    public void writeTo(StreamOutput out) throws IOException {
        super.writeTo(out);
        out.writeStringArray(indices);
        indicesOptions.writeIndicesOptions(out);
        timeout.writeTo(out);
    }
}
