package gossip

import (
	"github.com/iotaledger/goshimmer/packages/errors"
	"github.com/iotaledger/goshimmer/packages/events"
	"github.com/iotaledger/goshimmer/packages/identity"
	"github.com/iotaledger/goshimmer/packages/model/meta_transaction"
	"github.com/iotaledger/goshimmer/packages/network"
)

var Events = pluginEvents{
	// neighbor events
	AddNeighbor:    events.NewEvent(neighborCaller),
	UpdateNeighbor: events.NewEvent(neighborCaller),
	RemoveNeighbor: events.NewEvent(neighborCaller),

	// low level network events
	IncomingConnection: events.NewEvent(connectionCaller),

	// high level protocol events
	DropNeighbor:              events.NewEvent(neighborCaller),
	SendTransaction:           events.NewEvent(transactionCaller),
	SendTransactionRequest:    events.NewEvent(transactionCaller), // TODO
	ReceiveTransaction:        events.NewEvent(transactionCaller),
	ReceiveTransactionRequest: events.NewEvent(transactionCaller), // TODO
	ProtocolError:             events.NewEvent(transactionCaller), // TODO

	// generic events
	Error: events.NewEvent(errorCaller),
}

type pluginEvents struct {
	// neighbor events
	AddNeighbor    *events.Event
	UpdateNeighbor *events.Event
	RemoveNeighbor *events.Event

	// low level network events
	IncomingConnection *events.Event

	// high level protocol events
	DropNeighbor              *events.Event
	SendTransaction           *events.Event
	SendTransactionRequest    *events.Event
	ReceiveTransaction        *events.Event
	ReceiveTransactionRequest *events.Event
	ProtocolError             *events.Event

	// generic events
	Error *events.Event
}

type protocolEvents struct {
	ReceiveVersion            *events.Event
	ReceiveIdentification     *events.Event
	ReceiveConnectionAccepted *events.Event
	ReceiveConnectionRejected *events.Event
	ReceiveDropConnection     *events.Event
	ReceiveTransactionData    *events.Event
	ReceiveRequestData        *events.Event
	HandshakeCompleted        *events.Event
	Error                     *events.Event
}

type neighborEvents struct {
	ProtocolConnectionEstablished *events.Event
}

func intCaller(handler interface{}, params ...interface{}) { handler.(func(int))(params[0].(int)) }

func identityCaller(handler interface{}, params ...interface{}) {
	handler.(func(*identity.Identity))(params[0].(*identity.Identity))
}

func connectionCaller(handler interface{}, params ...interface{}) {
	handler.(func(*network.ManagedConnection))(params[0].(*network.ManagedConnection))
}

func protocolCaller(handler interface{}, params ...interface{}) {
	handler.(func(*protocol))(params[0].(*protocol))
}

func neighborCaller(handler interface{}, params ...interface{}) {
	handler.(func(*Neighbor))(params[0].(*Neighbor))
}

func errorCaller(handler interface{}, params ...interface{}) {
	handler.(func(errors.IdentifiableError))(params[0].(errors.IdentifiableError))
}

func dataCaller(handler interface{}, params ...interface{}) {
	handler.(func([]byte))(params[0].([]byte))
}

func transactionCaller(handler interface{}, params ...interface{}) {
	handler.(func(*meta_transaction.MetaTransaction))(params[0].(*meta_transaction.MetaTransaction))
}