//
// 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

import (
	"e2mgr/configuration"
	"e2mgr/logger"
	"e2mgr/managers"
	"e2mgr/mocks"
	"e2mgr/models"
	"e2mgr/rmrCgo"
	"e2mgr/services"
	"e2mgr/services/rmrsender"
	"e2mgr/tests"
	"fmt"
	"gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
	"gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
	"testing"
)

func initRanLostConnectionTest(t *testing.T) (*logger.Logger, E2TermInitNotificationHandler, *mocks.RnibReaderMock, *mocks.RnibWriterMock, *mocks.RmrMessengerMock, *mocks.E2TInstancesManagerMock) {

	logger := initLog(t)
	config := &configuration.Configuration{RnibRetryIntervalMs: 10, MaxRnibConnectionAttempts: 3}

	rmrMessengerMock := &mocks.RmrMessengerMock{}
	rmrSender := initRmrSender(rmrMessengerMock, logger)

	readerMock := &mocks.RnibReaderMock{}

	writerMock := &mocks.RnibWriterMock{}

	rnibDataService := services.NewRnibDataService(logger, config, readerMock, writerMock)
	ranSetupManager := managers.NewRanSetupManager(logger, rmrSender, rnibDataService)

	e2tInstancesManagerMock := &mocks.E2TInstancesManagerMock{}
	ranReconnectionManager := managers.NewRanReconnectionManager(logger, configuration.ParseConfiguration(), rnibDataService, ranSetupManager, e2tInstancesManagerMock)
	handler := NewE2TermInitNotificationHandler(logger, ranReconnectionManager, rnibDataService, e2tInstancesManagerMock)
	return logger, handler, readerMock, writerMock, rmrMessengerMock, e2tInstancesManagerMock
}

func TestE2TermInitGetE2TInstanceFailure(t *testing.T) {
	_, handler, _, _, _, e2tInstancesManagerMock := initRanLostConnectionTest(t)
	e2tInstanceAddress := "10.0.2.15"
	var e2tInstance *entities.E2TInstance
	e2tInstancesManagerMock.On("GetE2TInstance", e2tInstanceAddress).Return(e2tInstance, common.NewInternalError(fmt.Errorf("internal error")))
	notificationRequest := &models.NotificationRequest{RanName: RanName, Payload: []byte(e2tInstanceAddress)}
	handler.Handle(notificationRequest)
	e2tInstancesManagerMock.AssertNotCalled(t, "AddE2TInstance")
}

func TestE2TermInitNewE2TInstance(t *testing.T) {
	_, handler, _, _, _, e2tInstancesManagerMock := initRanLostConnectionTest(t)
	e2tInstanceAddress := "10.0.2.15"
	var e2tInstance *entities.E2TInstance
	e2tInstancesManagerMock.On("GetE2TInstance", e2tInstanceAddress).Return(e2tInstance, common.NewResourceNotFoundError("not found"))
	e2tInstance = entities.NewE2TInstance(e2tInstanceAddress)
	e2tInstancesManagerMock.On("AddE2TInstance", e2tInstanceAddress).Return(nil)
	notificationRequest := &models.NotificationRequest{RanName: RanName, Payload: []byte(e2tInstanceAddress)}
	handler.Handle(notificationRequest)
	e2tInstancesManagerMock.AssertCalled(t, "AddE2TInstance", e2tInstanceAddress)
}

func TestE2TermInitExistingE2TInstanceNoAssociatedRans(t *testing.T) {
	_, handler, _, _, _, e2tInstancesManagerMock := initRanLostConnectionTest(t)
	e2tInstanceAddress := "10.0.2.15"
	e2tInstance := entities.NewE2TInstance(e2tInstanceAddress)
	e2tInstancesManagerMock.On("GetE2TInstance", e2tInstanceAddress).Return(e2tInstance, nil)
	notificationRequest := &models.NotificationRequest{RanName: RanName, Payload: []byte(e2tInstanceAddress)}
	handler.Handle(notificationRequest)
	e2tInstancesManagerMock.AssertCalled(t, "GetE2TInstance", e2tInstanceAddress)
}

//func TestE2TerminInitHandlerSuccessOneRan(t *testing.T) {
//	_, handler, readerMock, writerMock, rmrMessengerMock, _ := initRanLostConnectionTest(t)
//	var rnibErr error
//
//	ids := []*entities.NbIdentity{{InventoryName: "test1"}}
//	readerMock.On("GetListNodebIds").Return(ids, rnibErr)
//
//	var initialNodeb = &entities.NodebInfo{ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	readerMock.On("GetNodeb", ids[0].InventoryName).Return(initialNodeb, rnibErr)
//
//	var argNodeb = &entities.NodebInfo{ConnectionStatus: entities.ConnectionStatus_CONNECTING, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	writerMock.On("UpdateNodebInfo", argNodeb).Return(rnibErr)
//
//	payload := e2pdus.PackedX2setupRequest
//	xaction := []byte(ids[0].InventoryName)
//	msg := rmrCgo.NewMBuf(rmrCgo.RIC_X2_SETUP_REQ, len(payload), ids[0].InventoryName, &payload, &xaction)
//
//	rmrMessengerMock.On("SendMsg", mock.Anything).Return(msg, nil)
//
//	handler.Handle(nil)
//
//	writerMock.AssertNumberOfCalls(t, "UpdateNodebInfo", 1)
//	rmrMessengerMock.AssertNumberOfCalls(t, "SendMsg", 1)
//}
//
//func TestE2TerminInitHandlerSuccessTwoRans(t *testing.T) {
//	_, handler, readerMock, writerMock, rmrMessengerMock, _ := initRanLostConnectionTest(t)
//	var rnibErr error
//
//	ids := []*entities.NbIdentity{{InventoryName: "test1"}, {InventoryName: "test2"}}
//	readerMock.On("GetListNodebIds").Return(ids, rnibErr)
//
//	var initialNodeb0 = &entities.NodebInfo{ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	var initialNodeb1 = &entities.NodebInfo{ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	readerMock.On("GetNodeb", ids[0].InventoryName).Return(initialNodeb0, rnibErr)
//	readerMock.On("GetNodeb", ids[1].InventoryName).Return(initialNodeb1, rnibErr)
//
//	var argNodeb = &entities.NodebInfo{ConnectionStatus: entities.ConnectionStatus_CONNECTING, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	writerMock.On("UpdateNodebInfo", argNodeb).Return(rnibErr)
//
//	payload := e2pdus.PackedX2setupRequest
//	xaction := []byte(ids[0].InventoryName)
//	msg := rmrCgo.NewMBuf(rmrCgo.RIC_X2_SETUP_REQ, len(payload), ids[0].InventoryName, &payload, &xaction)
//
//	rmrMessengerMock.On("SendMsg", mock.Anything).Return(msg, nil)
//
//	handler.Handle(nil)
//
//	writerMock.AssertNumberOfCalls(t, "UpdateNodebInfo", 2)
//	rmrMessengerMock.AssertNumberOfCalls(t, "SendMsg", 2)
//}
//
//func TestE2TerminInitHandlerSuccessThreeRansFirstRmrFailure(t *testing.T) {
//	log, handler, readerMock, writerMock, rmrMessengerMock, _ := initRanLostConnectionTest(t)
//	var rnibErr error
//
//	ids := []*entities.NbIdentity{{InventoryName: "test1"}, {InventoryName: "test2"}, {InventoryName: "test3"}}
//	readerMock.On("GetListNodebIds").Return(ids, rnibErr)
//
//	var initialNodeb0 = &entities.NodebInfo{RanName: ids[0].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	var initialNodeb1 = &entities.NodebInfo{RanName: ids[1].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	var initialNodeb2 = &entities.NodebInfo{RanName: ids[2].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	readerMock.On("GetNodeb", ids[0].InventoryName).Return(initialNodeb0, rnibErr)
//	readerMock.On("GetNodeb", ids[1].InventoryName).Return(initialNodeb1, rnibErr)
//	readerMock.On("GetNodeb", ids[2].InventoryName).Return(initialNodeb2, rnibErr)
//
//	var argNodeb0 = &entities.NodebInfo{RanName: ids[0].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTING, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	var argNodeb0Fail = &entities.NodebInfo{RanName: ids[0].InventoryName, ConnectionStatus: entities.ConnectionStatus_DISCONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 0}
//	writerMock.On("UpdateNodebInfo", argNodeb0).Return(rnibErr)
//	writerMock.On("UpdateNodebInfo", argNodeb0Fail).Return(rnibErr)
//
//	payload := models.NewE2RequestMessage(ids[0].InventoryName /*tid*/, "", 0, ids[0].InventoryName, e2pdus.PackedX2setupRequest).GetMessageAsBytes(log)
//	xaction := []byte(ids[0].InventoryName)
//	msg0 := rmrCgo.NewMBuf(rmrCgo.RIC_X2_SETUP_REQ, len(payload), ids[0].InventoryName, &payload, &xaction)
//
//	// Cannot use Mock because request MBuf contains pointers
//	//payload =models.NewE2RequestMessage(ids[1].InventoryName /*tid*/, "", 0,ids[1].InventoryName, e2pdus.PackedX2setupRequest).GetMessageAsBytes(log)
//	//xaction = []byte(ids[1].InventoryName)
//	//msg1 := rmrCgo.NewMBuf(rmrCgo.RIC_X2_SETUP_REQ, len(payload), ids[1].InventoryName, &payload, &xaction)
//
//	rmrMessengerMock.On("SendMsg", mock.Anything).Return(msg0, fmt.Errorf("RMR Error"))
//
//	handler.Handle(nil)
//
//	//test1 (before send +1, after failure +1), test2 (0) test3 (0)
//	writerMock.AssertNumberOfCalls(t, "UpdateNodebInfo", 2)
//	//test1 failure (+1), test2  (0). test3 (0)
//	rmrMessengerMock.AssertNumberOfCalls(t, "SendMsg", 1)
//}
//
//func TestE2TerminInitHandlerSuccessThreeRansSecondNotFoundFailure(t *testing.T) {
//	log, handler, readerMock, writerMock, rmrMessengerMock, _ := initRanLostConnectionTest(t)
//	var rnibErr error
//
//	ids := []*entities.NbIdentity{{InventoryName: "test1"}, {InventoryName: "test2"}, {InventoryName: "test3"}}
//	readerMock.On("GetListNodebIds").Return(ids, rnibErr)
//
//	var initialNodeb0 = &entities.NodebInfo{RanName: ids[0].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	var initialNodeb1 = &entities.NodebInfo{RanName: ids[1].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	var initialNodeb2 = &entities.NodebInfo{RanName: ids[2].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	readerMock.On("GetNodeb", ids[0].InventoryName).Return(initialNodeb0, rnibErr)
//	readerMock.On("GetNodeb", ids[1].InventoryName).Return(initialNodeb1, common.NewResourceNotFoundError("not found"))
//	readerMock.On("GetNodeb", ids[2].InventoryName).Return(initialNodeb2, rnibErr)
//
//	var argNodeb0 = &entities.NodebInfo{RanName: ids[0].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTING, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	var argNodeb0Success = &entities.NodebInfo{RanName: ids[0].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	writerMock.On("UpdateNodebInfo", argNodeb0).Return(rnibErr)
//	writerMock.On("UpdateNodebInfo", argNodeb0Success).Return(rnibErr)
//
//	var argNodeb2 = &entities.NodebInfo{RanName: ids[2].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTING, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	var argNodeb2Success = &entities.NodebInfo{RanName: ids[2].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	writerMock.On("UpdateNodebInfo", argNodeb2).Return(rnibErr)
//	writerMock.On("UpdateNodebInfo", argNodeb2Success).Return(rnibErr)
//
//	payload := models.NewE2RequestMessage(ids[0].InventoryName /*tid*/, "", 0, ids[0].InventoryName, e2pdus.PackedX2setupRequest).GetMessageAsBytes(log)
//	xaction := []byte(ids[0].InventoryName)
//	msg0 := rmrCgo.NewMBuf(rmrCgo.RIC_X2_SETUP_REQ, len(payload), ids[0].InventoryName, &payload, &xaction)
//
//	// Cannot use Mock because request MBuf contains pointers
//	//payload =models.NewE2RequestMessage(ids[1].InventoryName /*tid*/, "", 0,ids[1].InventoryName, e2pdus.PackedX2setupRequest).GetMessageAsBytes(log)
//	//xaction = []byte(ids[1].InventoryName)
//	//msg1 := rmrCgo.NewMBuf(rmrCgo.RIC_X2_SETUP_REQ, len(payload), ids[1].InventoryName, &payload, &xaction)
//
//	rmrMessengerMock.On("SendMsg", mock.Anything).Return(msg0, nil)
//
//	handler.Handle(nil)
//
//	readerMock.AssertNumberOfCalls(t, "GetNodeb", 3)
//	//test1 (+1), test2 failure (0) test3 (+1)
//	writerMock.AssertNumberOfCalls(t, "UpdateNodebInfo", 2)
//	//test1 success (+1), test2  (0). test3 (+1)
//	rmrMessengerMock.AssertNumberOfCalls(t, "SendMsg", 2)
//}
//
//func TestE2TerminInitHandlerSuccessThreeRansSecondRnibInternalErrorFailure(t *testing.T) {
//	log, handler, readerMock, writerMock, rmrMessengerMock, _ := initRanLostConnectionTest(t)
//	var rnibErr error
//
//	ids := []*entities.NbIdentity{{InventoryName: "test1"}, {InventoryName: "test2"}, {InventoryName: "test3"}}
//	readerMock.On("GetListNodebIds").Return(ids, rnibErr)
//
//	var initialNodeb0 = &entities.NodebInfo{RanName: ids[0].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	var initialNodeb1 = &entities.NodebInfo{RanName: ids[1].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	var initialNodeb2 = &entities.NodebInfo{RanName: ids[2].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST}
//	readerMock.On("GetNodeb", ids[0].InventoryName).Return(initialNodeb0, rnibErr)
//	readerMock.On("GetNodeb", ids[1].InventoryName).Return(initialNodeb1, common.NewInternalError(fmt.Errorf("internal error")))
//	readerMock.On("GetNodeb", ids[2].InventoryName).Return(initialNodeb2, rnibErr)
//
//	var argNodeb0 = &entities.NodebInfo{RanName: ids[0].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTING, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	var argNodeb0Success = &entities.NodebInfo{RanName: ids[0].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	writerMock.On("UpdateNodebInfo", argNodeb0).Return(rnibErr)
//	writerMock.On("UpdateNodebInfo", argNodeb0Success).Return(rnibErr)
//
//	var argNodeb2 = &entities.NodebInfo{RanName: ids[2].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTING, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	var argNodeb2Success = &entities.NodebInfo{RanName: ids[2].InventoryName, ConnectionStatus: entities.ConnectionStatus_CONNECTED, E2ApplicationProtocol: entities.E2ApplicationProtocol_X2_SETUP_REQUEST, ConnectionAttempts: 1}
//	writerMock.On("UpdateNodebInfo", argNodeb2).Return(rnibErr)
//	writerMock.On("UpdateNodebInfo", argNodeb2Success).Return(rnibErr)
//
//	payload := models.NewE2RequestMessage(ids[0].InventoryName /*tid*/, "", 0, ids[0].InventoryName, e2pdus.PackedX2setupRequest).GetMessageAsBytes(log)
//	xaction := []byte(ids[0].InventoryName)
//	msg0 := rmrCgo.NewMBuf(rmrCgo.RIC_X2_SETUP_REQ, len(payload), ids[0].InventoryName, &payload, &xaction)
//
//	// Cannot use Mock because request MBuf contains pointers
//	//payload =models.NewE2RequestMessage(ids[1].InventoryName /*tid*/, "", 0,ids[1].InventoryName, e2pdus.PackedX2setupRequest).GetMessageAsBytes(log)
//	//xaction = []byte(ids[1].InventoryName)
//	//msg1 := rmrCgo.NewMBuf(rmrCgo.RIC_X2_SETUP_REQ, len(payload), ids[1].InventoryName, &payload, &xaction)
//
//	rmrMessengerMock.On("SendMsg", mock.Anything).Return(msg0, nil)
//
//	handler.Handle(nil)
//
//	readerMock.AssertNumberOfCalls(t, "GetNodeb", 2)
//	//test1 (+1), test2 failure (0) test3 (0)
//	writerMock.AssertNumberOfCalls(t, "UpdateNodebInfo", 1)
//	//test1 success (+1), test2  (0). test3 (+1)
//	rmrMessengerMock.AssertNumberOfCalls(t, "SendMsg", 1)
//}
//
//func TestE2TerminInitHandlerSuccessZeroRans(t *testing.T) {
//	_, handler, readerMock, writerMock, rmrMessengerMock, _ := initRanLostConnectionTest(t)
//	var rnibErr error
//
//	readerMock.On("GetListNodebIds").Return([]*entities.NbIdentity{}, rnibErr)
//
//	handler.Handle(nil)
//
//	writerMock.AssertNumberOfCalls(t, "UpdateNodebInfo", 0)
//	rmrMessengerMock.AssertNumberOfCalls(t, "SendMsg", 0)
//}
//
//func TestE2TerminInitHandlerFailureGetListNodebIds(t *testing.T) {
//	_, handler, readerMock, writerMock, rmrMessengerMock, _ := initRanLostConnectionTest(t)
//
//	readerMock.On("GetListNodebIds").Return([]*entities.NbIdentity{}, common.NewInternalError(fmt.Errorf("internal error")))
//
//	handler.Handle(nil)
//
//	writerMock.AssertNumberOfCalls(t, "UpdateNodebInfo", 0)
//	rmrMessengerMock.AssertNumberOfCalls(t, "SendMsg", 0)
//}

// TODO: extract to test_utils
func initRmrSender(rmrMessengerMock *mocks.RmrMessengerMock, log *logger.Logger) *rmrsender.RmrSender {
	rmrMessenger := rmrCgo.RmrMessenger(rmrMessengerMock)
	rmrMessengerMock.On("Init", tests.GetPort(), tests.MaxMsgSize, tests.Flags, log).Return(&rmrMessenger)
	return rmrsender.NewRmrSender(log, rmrMessenger)
}

// TODO: extract to test_utils
func initLog(t *testing.T) *logger.Logger {
	log, err := logger.InitLogger(logger.InfoLevel)
	if err != nil {
		t.Errorf("#delete_all_request_handler_test.TestHandleSuccessFlow - failed to initialize logger, error: %s", err)
	}
	return log
}