package messages

import (
	"forge.redroom.link/yves/meowlib"
	"forge.redroom.link/yves/meowlib/client"
	"google.golang.org/protobuf/proto"
)

// Step2InviteeCreatesInitiatorAndEncryptedContactCard deserialises the step-1 payload bytes,
// creates the invitee's peer entry, builds and encrypts the invitee's ContactCard, and returns
// a serialized Invitation (step=2) whose Payload is the PackedUserMessage encrypted with the
// initiator's temporary public key. The bytes are transport-ready and consumed directly by
// Step3InitiatorFinalizesInviteeAndCreatesContactCard.
func Step2InviteeCreatesInitiatorAndEncryptedContactCard(payloadBytes []byte, nickname string, myNickname string, serverUids []string) ([]byte, error) {
	mynick := myNickname
	if mynick == "" {
		mynick = client.GetConfig().GetIdentity().Nickname
	}
	var payload meowlib.InvitationInitPayload
	if err := proto.Unmarshal(payloadBytes, &payload); err != nil {
		return nil, err
	}
	peer, err := client.GetConfig().GetIdentity().InvitationStep2(mynick, nickname, serverUids, &payload)
	if err != nil {
		return nil, err
	}
	usermsg, err := peer.BuildInvitationStep2Message(peer.GetMyContact())
	if err != nil {
		return nil, err
	}
	packed, err := peer.ProcessOutboundUserMessage(usermsg)
	if err != nil {
		return nil, err
	}
	packedBytes, err := proto.Marshal(packed)
	if err != nil {
		return nil, err
	}
	inv := &meowlib.Invitation{
		Uuid:    payload.Uuid,
		Step:    2,
		From:    peer.MyIdentity.Public,
		Payload: packedBytes,
	}
	client.GetConfig().GetIdentity().Save()
	return proto.Marshal(inv)
}