package org.onap.holmes.ccvpn;

dialect "java"

import org.onap.holmes.common.api.stat.VesAlarm;
import org.onap.holmes.common.api.stat.AlarmAdditionalField;
import org.onap.holmes.common.aai.AaiQuery4Ccvpn;
import org.onap.holmes.common.exception.CorrelationException;
import org.onap.holmes.common.dmaap.entity.PolicyMsg;
import org.onap.holmes.common.dmaap.DmaapService;
import org.onap.holmes.common.utils.DroolsLog;
import org.onap.holmes.common.dropwizard.ioc.utils.ServiceLocatorHolder;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import java.util.List;
import java.util.Map;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.UUID;

function String getAdditionalField(VesAlarm a, String field) {
	List<AlarmAdditionalField> fields = a.getAlarmAdditionalInformation();
	for (AlarmAdditionalField f : fields) {
		if (f.getName().equals(field)) {
			return f.getValue();
		}
	}
	return null;
}

function String getLogicLink(VesAlarm alarm) {
	AaiQuery4Ccvpn aai = AaiQuery4Ccvpn.newInstance();
	return aai.getLogicLink(
		getAdditionalField(alarm, "networkId"),
		getAdditionalField(alarm, "node"),
		getAdditionalField(alarm, "tp-id"),
		getAdditionalField(alarm, "oper-status")
	);
}

function boolean isCorrelated(VesAlarm a, VesAlarm b) {
	String logicLinkA = getLogicLink(a);
	if (logicLinkA == null)	{
		return false;
	}

	String logicLinkB = getLogicLink(b);
	if (logicLinkB == null) {
		return false;
	}

	return logicLinkA.equals(logicLinkB);
}

function void updateAaiStatus(String networkId, String pnfName, String ifName,
		String linkName, String status) {
	AaiQuery4Ccvpn aai = AaiQuery4Ccvpn.newInstance();
	Map<String, Object> body = new HashMap<String, Object>(){
		{
			put("operational-status", status);
		}
	};
	aai.updateLogicLinkStatus(linkName, body);
	aai.updateTerminalPointStatus(networkId, pnfName, ifName, body);
}

function Map<String, Object> getAdditionalResourceInfo(String networkId, String pnfName, String ifName, String status) {
	AaiQuery4Ccvpn aai = AaiQuery4Ccvpn.newInstance();
	JSONArray instances = aai.getServiceInstances(networkId, pnfName, ifName, status);

	Map<String, Object> ret = new HashMap<String, Object>();

	StringBuilder sb = new StringBuilder();
	for(int i = 0; i < instances.size(); ++i) {
		JSONObject o = instances.getJSONObject(i);
		String name = o.getString("service-instance-name");
		ret.put(name + ".input-parameters", o.getString("input-parameters"));
		sb.append(name).append(",");
	}
	ret.put("service-instance.service-instance-name", sb.substring(0, sb.length() -1).toString());
	ret.put("vserver.vserver-name", "TBD");
	ret.put("globalSubscriberId", instances.getJSONObject(0).getString("globalSubscriberId"));
	ret.put("serviceType", instances.getJSONObject(0).getString("serviceType"));

	return ret;
}

function PolicyMsg createPolicyMsg(VesAlarm alarm) {
	PolicyMsg m = new PolicyMsg();
	m.setPolicyVersion("1.0.0.5");
	m.setPolicyName("CCVPN");
	m.setPolicyScope("service=SOTNService,type=SampleType,closedLoopControlName=CL-CCVPN-d925ed73-8231-4d02-9545-db4e101f88f8");
	m.setClosedLoopControlName(DmaapService.loopControlNames.get("org.onap.holmes.ccvpn"));
	m.setRequestID(UUID.randomUUID().toString());
	m.setClosedLoopAlarmStart(alarm.getStartEpochMicrosec());
	m.setClosedLoopAlarmEnd(alarm.getLastEpochMicrosec());
	m.setTarget("vserver.vserver-name");
	m.setAai(getAdditionalResourceInfo(
		getAdditionalField(alarm, "networkId"),
		getAdditionalField(alarm, "node"),
		getAdditionalField(alarm, "tp-id"),
		getAdditionalField(alarm, "oper-status")
	));

	DmaapService.alarmUniqueRequestID.put(alarm.getEventId(), m.getRequestID());

	return m;
}

rule "Update AAI Information"
	no-loop true
	salience 300
	when
		$a: VesAlarm(eventName.indexOf("Fault_Route_Status") != -1)
	then
		updateAaiStatus (
			getAdditionalField($a, "networkId"),
			getAdditionalField($a, "node"),
			getAdditionalField($a, "tp-id"),
			getLogicLink($a),
			getAdditionalField($a, "oper-status")
		);
end

rule "Set Up Correlation"
	no-loop true
	salience 200
	when
		$a: VesAlarm($id: eventId, 
						$start: startEpochMicrosec, 
						eventName.indexOf("Fault_Route_Status") != -1)
		$b: VesAlarm(eventId != $id, 
						eventName.indexOf("Fault_Route_Status") != -1, 
						Math.abs(startEpochMicrosec - $start) < 60000)
	then
		if ("down".equalsIgnoreCase(getAdditionalField($a, "oper-status")) 
				&& "down".equalsIgnoreCase(getAdditionalField($b, "oper-status"))) {
		    if (isCorrelated($a, $b)){
		    	// If any of the alarms have been marked as root, a policy message has ever been created and sent. Do NOT send it again.
		    	if ($a.getRootFlag() != 1 && $b.getRootFlag() != 1) {
			    	PolicyMsg msg = createPolicyMsg($a);
			        DmaapService dmaapService = ServiceLocatorHolder.getLocator().getService(DmaapService.class);
			        dmaapService.publishPolicyMsg(msg, "unauthenticated.DCAE_CL_OUTPUT");
		    	}
		        $a.setRootFlag(1);
		        $b.setRootFlag(1);
		        update($a);
		        update($b);
		    }
	    }
end

rule "Clear Alarms"
	no-loop true
	salience 100
	when
		$a: VesAlarm(eventName.indexOf("Fault_Route_Status") != -1)
	then
		if ("up".equalsIgnoreCase(getAdditionalField($a, "oper-status"))) {
			if (DmaapService.alarmUniqueRequestID.containsKey($a.getEventId())) {
				DmaapService.alarmUniqueRequestID.remove($a.getEventId());
			}
	
			//TODO: send alarm clearing message to Policy - for now it's not needed.
	        //...
	
			retract($a);
		}
end