//
// Copyright 2019 AT&T Intellectual Property
// Copyright 2019 Nokia
//
// 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 rmrmsghandlers

// #cgo CFLAGS: -I../../asn1codec/inc/ -I../../asn1codec/e2ap_engine/
// #cgo LDFLAGS: -L ../../asn1codec/lib/ -L../../asn1codec/e2ap_engine/ -le2ap_codec -lasncodec
// #include <asn1codec_utils.h>
// #include <configuration_update_wrapper.h>
import "C"
import (
	"e2mgr/converters"
	"e2mgr/e2pdus"
	"e2mgr/logger"
	"e2mgr/models"
	"e2mgr/rmrCgo"
	"e2mgr/sessions"
	"unsafe"
)

type EndcConfigurationUpdateHandler struct{}

func NewEndcConfigurationUpdateHandler() EndcConfigurationUpdateHandler {
	return EndcConfigurationUpdateHandler{}
}

func (src EndcConfigurationUpdateHandler) Handle(logger *logger.Logger, e2Sessions sessions.E2Sessions, request *models.NotificationRequest,
	messageChannel chan<- *models.NotificationResponse) {

	var payloadSize C.ulong
	payloadSize = e2pdus.MaxAsn1PackedBufferSize
	packedBuffer := [e2pdus.MaxAsn1PackedBufferSize]C.uchar{}
	errorBuffer := [e2pdus.MaxAsn1PackedBufferSize]C.char{}
	refinedMessage, err := converters.UnpackX2apPduAndRefine(logger, e2pdus.MaxAsn1CodecAllocationBufferSize /*allocation buffer*/, request.Len, request.Payload, e2pdus.MaxAsn1CodecMessageBufferSize /*message buffer*/)
	if err != nil {
		status := C.build_pack_endc_configuration_update_failure(&payloadSize, &packedBuffer[0], e2pdus.MaxAsn1PackedBufferSize, &errorBuffer[0])
		if status {
			payload := (*[1 << 30]byte)(unsafe.Pointer(&packedBuffer))[:payloadSize:payloadSize]
			logger.Debugf("#endc_configuration_update_handler.Handle - Endc configuration update negative ack message payload: (%d) %02x", len(payload), payload)
			response := models.NotificationResponse{RanName: request.RanName, Payload: payload, MgsType: rmrCgo.RIC_ENDC_CONF_UPDATE_FAILURE}
			messageChannel <- &response
		} else {
			logger.Errorf("#endc_configuration_update_handler.Handle - failed to build and pack Endc configuration update unsuccessful outcome message. Error: %v", errorBuffer)
		}
		logger.Errorf("#endc_configuration_update_handler.Handle - unpack failed. Error: %v", err)
	} else {
		logger.Infof("#endc_configuration_update_handler.Handle - Endc configuration update initiating message received")
		logger.Debugf("#endc_configuration_update_handler.Handle - Endc configuration update initiating message payload: %s", refinedMessage.PduPrint)
		status := C.build_pack_endc_configuration_update_ack(&payloadSize, &packedBuffer[0], e2pdus.MaxAsn1PackedBufferSize, &errorBuffer[0])
		if status {
			payload := (*[1 << 30]byte)(unsafe.Pointer(&packedBuffer))[:payloadSize:payloadSize]
			logger.Debugf("#endc_configuration_update_handler.Handle - Endc configuration update positive ack message payload: (%d) %02x", len(payload), payload)
			response := models.NotificationResponse{RanName: request.RanName, Payload: payload, MgsType: rmrCgo.RIC_ENDC_CONF_UPDATE_ACK}
			messageChannel <- &response
		} else {
			logger.Errorf("#endc_configuration_update_handler.Handle - failed to build and pack endc configuration update successful outcome message. Error: %v", errorBuffer)
		}
	}
	printHandlingSetupResponseElapsedTimeInMs(logger, "#endc_configuration_update_handler.Handle - Summary: Elapsed time for receiving and handling endc configuration update initiating message from E2 terminator", request.StartTime)
}