package helpers

import (
	"strings"

	"forge.redroom.link/yves/meowlib"
	"forge.redroom.link/yves/meowlib/client"
)

// InvitationCheck
// todo
/*
func InvitationCheck(invitationdata []byte) *C.char {
	var jsoninv map[string]interface{}
	err := json.Unmarshal([]byte(C.GoString(invitationdata)), &jsoninv)
	if err != nil {
		return C.CString(errorToJson(err, "InvitationCheck: "))
	}
	var cc *meowlib.ContactCard
	if _, err := os.Stat(jsoninv["filename"].(string)); os.IsNotExist(err) {
		return C.CString(errorToJson(err, "InvitationCheck: "))
	}
	if strings.HasSuffix(jsoninv["filename"].(string), ".mwiv") {
		data, err := os.ReadFile(jsoninv["filename"].(string))
		if err != nil {
			return C.CString(errorToJson(err, "InvitationCheck: "))
		}
		cc, err = meowlib.NewContactCardFromCompressed(data)
		if err != nil {
			return C.CString(errorToJson(err, "InvitationCheck: "))
		}
	}
	identity := client.GetConfig().GetIdentity()
	result := map[string]string{}
	if cc != nil {
		isAnswer, proposed, received, invitationMessage := identity.CheckInvitation(cc)
		if isAnswer { // answer to infitation
			result["type"] = "answer"
			result["to"] = proposed
			result["from"] = received
			result["invitation_message"] = invitationMessage
			//fmt.Fprintln(os.Stdout, "Invitation sent to "+proposed+" received with  "+received+" as suggested nickname")
		} else { // finalization message
			result["type"] = "finalize"
			result["from"] = received
			//fmt.Fprintln(os.Stdout, "Invitation sent by "+received)
		}

	}
	val, err := json.Marshal(result)
	if err != nil {
		return C.CString(errorToJson(err, "InvitationCheck: "))
	}
	return C.CString(string(val))
}*/

// InvitationGetMessage
// Called by the invitation receiver
// invitationUrl: the url of server holding the invitation
// serverPublicKey: the public key of the server holding the invitation
// invitationPassword: the password of the invitation
func InvitationGetMessage(invitationUrl string, serverPublicKey string, invitationPassword string) ([]byte, string, error) {

	meowurl := strings.Split(invitationUrl[7:], "?")

	serverurl := meowurl[0]
	shortcode := meowurl[1]
	srv := client.Server{}
	// check if already in msg servers
	dbsrv, err := client.GetConfig().GetIdentity().MessageServers.LoadServer(serverurl)
	if err != nil {
		return nil, "InvitationGetMessage: LoadServer", err
	}
	if dbsrv == nil {
		// create a server object with url & pubkey
		srv.Url = serverurl
		srv.PublicKey = serverPublicKey
		srv.UserKp = meowlib.NewKeyPair()
		// save it
		err = client.GetConfig().GetIdentity().MessageServers.StoreServer(&srv)
		if err != nil {
			return nil, "InvitationGetMessage: StoreServer", err
		}
	} else {
		srv = *dbsrv
	}
	// buildserver message
	toSrvMsg, err := srv.BuildToServerMessageInvitationRequest(shortcode, invitationPassword)
	if err != nil {
		return nil, "InvitationGetMessage: BuildToServerMessageInvitationRequest", err
	}
	// processoutbound
	bytemsg, err := srv.ProcessOutboundMessage(toSrvMsg)
	if err != nil {
		return nil, "InvitationGetMessage: ProcessOutboundMessage", err
	}

	return bytemsg, "", nil
}

// InvitationGetMessageReadResponse
// Called by the invitation receiver
// invitationData: the data received from the server
// invitationServerUid: the uid of the server holding the invitation
func InvitationGetMessageReadResponse(invitationData []byte, invitationServerUid string) (*meowlib.ContactCard, string, error) {

	server, err := client.GetConfig().GetIdentity().MessageServers.LoadServer(invitationServerUid)
	if err != nil {
		return nil, "InvitationGetMessageReadResponse: LoadServer", err
	}
	// Server inbound processing : get the invitation server
	serverMsg, err := server.ProcessInboundServerResponse(invitationData)
	if err != nil {
		return nil, "InvitationGetMessageReadResponse: ProcessInboundServerResponse", err
	}
	// fmt.Println("Inbound OK, Invitation Step: ", serverMsg.Invitation.Step, len(serverMsg.Invitation.Payload))
	// fmt.Println("Invitation Check")
	// fmt.Println(hex.EncodeToString(serverMsg.Invitation.Payload))
	// contactCard decode
	cc, err := meowlib.NewContactCardFromCompressed(serverMsg.Invitation.Payload)
	if err != nil {
		return nil, "InvitationGetMessageReadResponse: NewContactCardFromCompressed", err
	}
	return cc, "", nil
}