/*
 * ===============================LICENSE_START======================================
 *  dcae-analytics
 * ================================================================================
 *    Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 *  Licensed 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.
 *  ============================LICENSE_END===========================================
 */

package org.onap.dcae.apod.analytics.dmaap.domain.config;

import com.google.common.base.Objects;
import org.onap.dcae.apod.analytics.common.AnalyticsConstants;

import javax.annotation.Nonnull;

/**
 * <p>
 *      Immutable DMaaP MR Configuration for DMaaP MR Publisher.
 * <p>
 *      Use {@link DMaaPMRPublisherConfig.Builder} to construct Subscriber Configuration
 * </p>
 * <p>
 * @author Rajiv Singla . Creation Date: 10/12/2016.
 */
public class DMaaPMRPublisherConfig extends DMaaPMRBaseConfig {

    /**
     * Publisher batching queue size
     */
    private int maxBatchSize;

    /**
     * Publisher Recovery Queue Size
     */
    private int maxRecoveryQueueSize;


    private DMaaPMRPublisherConfig(@Nonnull String hostName,
                                   @Nonnull Integer portNumber,
                                   @Nonnull String topicName,
                                   @Nonnull String protocol,
                                   String userName,
                                   String userPassword,
                                   @Nonnull String contentType,
                                   int maxBatchSize,
                                   int maxRecoveryQueueSize) {
        this.hostName = hostName;
        this.portNumber = portNumber;
        this.topicName = topicName;
        this.protocol = protocol;
        this.userName = userName;
        this.userPassword = userPassword;
        this.contentType = contentType;
        this.maxBatchSize = maxBatchSize;
        this.maxRecoveryQueueSize = maxRecoveryQueueSize;
    }


    /**
     * Builder to initialize immutable {@link DMaaPMRPublisherConfig} object
     */
    public static class Builder {

        private String hostName;
        private Integer portNumber;
        private String topicName;
        private String userName;
        private String userPassword;
        private String protocol;
        private String contentType;
        private int maxBatchSize;
        private int maxRecoveryQueueSize;

        public Builder(@Nonnull String hostName, @Nonnull String topicName) {
            // required values
            this.hostName = hostName;
            this.topicName = topicName;
            // Default values
            this.portNumber = AnalyticsConstants.DEFAULT_PORT_NUMBER;
            this.userName = AnalyticsConstants.DEFAULT_USER_NAME;
            this.userPassword = AnalyticsConstants.DEFAULT_USER_PASSWORD;
            this.protocol = AnalyticsConstants.DEFAULT_PROTOCOL;
            this.contentType = AnalyticsConstants.DEFAULT_CONTENT_TYPE;
            this.maxBatchSize = AnalyticsConstants.DEFAULT_PUBLISHER_MAX_BATCH_SIZE;
            this.maxRecoveryQueueSize = AnalyticsConstants.DEFAULT_PUBLISHER_MAX_RECOVERY_QUEUE_SIZE;
        }

        /**
         * Setup for custom host port number - Defaults to 80.
         *
         * @param portNumber custom port number
         * @return Builder object itself for chaining
         */
        public Builder setPortNumber(@Nonnull Integer portNumber) {
            this.portNumber = portNumber;
            return this;
        }


        /**
         * Setup user name for authentication. If no username is provided authentication will be disabled
         *
         * @param userName user name for DMaaP Topic Authentication
         * @return Builder object itself for chaining
         */
        public Builder setUserName(@Nonnull String userName) {
            this.userName = userName;
            return this;
        }


        /**
         * Setup user password for authentication. If no password is provided authentication will be disabled
         *
         * @param userPassword user password for DMaaP Topic Authentication
         * @return Builder object itself for chaining
         */
        public Builder setUserPassword(@Nonnull String userPassword) {
            this.userPassword = userPassword;
            return this;
        }


        /**
         * Setup custom Publisher protocol - Defaults to https.
         * Note: Only http and https are currently supported.
         *
         * @param protocol protocol e.g. https
         * @return Builder object itself for chaining
         */
        public Builder setProtocol(@Nonnull String protocol) {
            this.protocol = normalizeValidateProtocol(protocol);
            return this;
        }


        /**
         * Setup custom Publisher content-type - Defaults to application/json
         *
         * @param contentType content type e.g. application/json
         * @return Builder object itself for chaining
         */
        public Builder setContentType(@Nonnull String contentType) {
            final String normalizedContentType = normalizeValidateContentType(contentType);
            this.contentType = normalizedContentType;
            return this;
        }


        /**
         * Setup custom Publisher Max Batch Size - Defaults to 100
         *
         * @param maxBatchSize max Batch Size
         * @return Builder object itself for chaining
         */
        public Builder setMaxBatchSize(int maxBatchSize) {
            this.maxBatchSize = maxBatchSize;
            return this;
        }


        /**
         * Setup custom Maximum Recovery Queue Size. Recovery Queue is used to hold messages temporarily in case
         * DMaaP MR Publisher topic is not responding for any reason. Defaults to 100,000
         *
         * @param maxRecoveryQueueSize max recovery queue size
         * @return Builder object itself for chaining
         */
        public Builder setMaxRecoveryQueueSize(int maxRecoveryQueueSize) {
            this.maxRecoveryQueueSize = maxRecoveryQueueSize;
            return this;
        }

        /**
         * Creates immutable instance of {@link DMaaPMRPublisherConfig}
         *
         * @return Builds and returns thread safe, immutable {@link DMaaPMRPublisherConfig} object
         */
        public DMaaPMRPublisherConfig build() {
            return new DMaaPMRPublisherConfig(hostName, portNumber, topicName, protocol, userName, userPassword,
                    contentType, maxBatchSize, maxRecoveryQueueSize);
        }

    }


    /**
     * Returns max Publisher Batch Queue Size
     *
     * @return max Publisher Batch Queue size
     */
    public int getMaxBatchSize() {
        return maxBatchSize;
    }

    /**
     * Returns max Publisher Recovery Queue Size
     *
     * @return max Recovery Queue size
     */
    public int getMaxRecoveryQueueSize() {
        return maxRecoveryQueueSize;
    }


    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        if (!super.equals(o)) {
            return false;
        }
        DMaaPMRPublisherConfig that = (DMaaPMRPublisherConfig) o;
        return maxBatchSize == that.maxBatchSize &&
                maxRecoveryQueueSize == that.maxRecoveryQueueSize;
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(super.hashCode(), maxBatchSize, maxRecoveryQueueSize);
    }


    @Override
    public String toString() {
        return Objects.toStringHelper(this)
                .add("baseConfig", super.toString())
                .add("maxBatchSize", maxBatchSize)
                .add("maxRecoveryQueueSize", maxRecoveryQueueSize)
                .toString();
    }
}