/**
 *     Copyright (c) 2018 Orange
 *
 *     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.
 */
package org.onap.nbi.apis.hub.service;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.onap.nbi.apis.hub.model.Event;
import org.onap.nbi.apis.hub.model.EventType;
import org.onap.nbi.apis.serviceorder.model.ServiceOrder;
import org.onap.nbi.apis.serviceorder.model.ServiceOrderItem;
import org.onap.nbi.commons.JacksonFilter;
import org.onap.nbi.commons.JsonRepresentation;

import java.util.Date;
import java.util.UUID;

public class EventFactory {

    private static final ObjectMapper mapper = new ObjectMapper();

    public static Event getEvent(EventType eventType, ServiceOrder serviceOrder, ServiceOrderItem serviceOrderItem) {
        Event event = new Event();
        event.setEventId(UUID.randomUUID().toString());
        event.setEventDate(new Date());
        event.setEventType(eventType.value());

        JsonNode serviceOrderJson = mapper.valueToTree(filterServiceOrder(serviceOrder));

        if (EventType.SERVICE_ORDER_ITEM_STATE_CHANGE.equals(eventType)) {
            JsonNode serviceOrderItemJson = mapper.valueToTree(serviceOrderItem);
            ((ObjectNode)serviceOrderJson).putArray("orderItem").add(serviceOrderItemJson);
        }

        event.setEvent(serviceOrderJson);

        return event;
    }


    /**
     * Filter ServiceOrderObject to produce a lightweight object that fit the eventBody specification
     * @param serviceOrder
     * @return
     */
    private static Object filterServiceOrder(final ServiceOrder serviceOrder) {

        Object filteredServiceOrder;

        JsonRepresentation jsonRepresentation = new JsonRepresentation();
        jsonRepresentation.add("id").add("href").add("externalId").add("state").add("orderDate").add
                ("completionDateTime").add("orderItem");

        filteredServiceOrder = JacksonFilter.createNode(serviceOrder, jsonRepresentation);

        return filteredServiceOrder;
    }
}