package helpers

import (
	"os"
	"time"

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

// InvitationCreatePeer creates a new peer and returns it
// Called by invitation initiator
// name: the name of the peer
// myNickname: my nickname for that peer
// invitationMessage: the message to send to the peer
// serverUids: the list of server uids
func InvitationCreatePeer(name string, myNickname string, invitationMessage string, serverUids []string) (*client.Peer, string, error) {

	mynick := myNickname
	if myNickname == "" {
		mynick = client.GetConfig().GetIdentity().Nickname
	}

	// build my contact card for that friend
	peer, err := client.GetConfig().GetIdentity().InvitePeer(mynick, myNickname, serverUids, invitationMessage)
	if err != nil {
		return nil, "InvitationCreate: InvitePeer", err
	}
	client.GetConfig().GetIdentity().Save()

	return peer, "", nil
}

// InvitationCreateFile creates a new peer and writes the invitation to a file
// Called by invitation initiator
// name: the name of the peer
// myNickname: my nickname for that peer
// invitationMessage: the message to send to the peer
// serverUids: the list of server uids
// format: the format of the file (qr or mwiv)
func InvitationCreateFile(name string, myNickname string, invitationMessage string, serverUids []string, format string) (*client.Peer, string, error) {

	peer, errdata, err := InvitationCreatePeer(name, myNickname, invitationMessage, serverUids)
	if err != nil {
		return nil, errdata, err
	}
	c := client.GetConfig()
	var filename string = ""
	if format == "qr" {
		filename = c.StoragePath + string(os.PathSeparator) + peer.MyName + "-" + peer.Name + ".png"
		err := peer.GetMyContact().WriteQr(filename)
		if err != nil {
			return nil, "InvitationCreateFile: WriteQr", err
		}
	} else {
		filename = c.StoragePath + string(os.PathSeparator) + peer.MyName + "-" + peer.Name + ".mwiv"
		err := peer.GetMyContact().WriteCompressed(filename)
		if err != nil {
			return nil, "InvitationCreateFile: WriteCompressed", err
		}
	}
	return peer, "", nil
}

// InvitationCreateMessage creates a new invitation message for an invited peer
// Called by invitation initiator
// invitationId: the invitation id of the peer
// invitationServerUid: the uid of the server for sending the invitation
// timeOut: the timeout for the invitation
// urlLen: the length of the invitation url
// password: the password for the invitation
func InvitationCreateMessage(invitationId string, invitationServerUid string, timeOut int, urlLen int, password string) ([]byte, string, error) {

	// lookup for peer with "invitation_id"
	var myContact *meowlib.ContactCard
	for i := 0; i < len(client.GetConfig().GetIdentity().Peers); i++ {
		if client.GetConfig().GetIdentity().Peers[i].InvitationId == invitationId {
			myContact = client.GetConfig().GetIdentity().Peers[i].GetMyContact()
			break
		}
	}
	// todo handle not found !!
	// lookup for message server with "invitation_server"
	invitationServer, err := client.GetConfig().GetIdentity().MessageServers.LoadServer(invitationServerUid) //.GetServerByIdx(int(jsoninv["invitation_server"].(float64)))
	if err != nil {
		return nil, "InvitationCreateMessage: LoadServer", err
	}
	// call server.buildinviattion
	msg, err := invitationServer.BuildToServerMessageInvitationCreation(myContact, password, timeOut, urlLen)
	if err != nil {
		return nil, "InvitationCreateMessage: BuildToServerMessageInvitationCreation", err
	}
	// fmt.Println("Invitation Create")
	// fmt.Println(hex.EncodeToString(msg.Invitation.Payload))
	bytemsg, err := invitationServer.ProcessOutboundMessage(msg)
	if err != nil {
		return nil, "InvitationCreateMessage: ProcessOutboundMessage", err
	}
	return bytemsg, "", nil
}

// InvitationCreateReadResponse reads the response of an invitation creation (url, expiry)
// Called by invitation initiator
// invitationServerUid: the uid of the server where we sent the invitation
// invitationResponse: the response we got from the server
func InvitationCreateReadResponse(invitationServerUid string, invitationResponse []byte) (*meowlib.Invitation, string, error) {

	server, err := client.GetConfig().GetIdentity().MessageServers.LoadServer(invitationServerUid)
	if err != nil {
		return nil, "InvitationCreateReadResponse: LoadServer", err
	}
	serverMsg, err := server.ProcessInboundServerResponse(invitationResponse)
	if err != nil {
		return nil, "InvitationCreateReadResponse: ProcessInboundServerResponse", err
	}

	return serverMsg.Invitation, "", nil
}

// InvitationSetUrlInfo sets the url info for an invitation
// Called by invitation initiator
// invitationId: the invitation id of the peer
// url: the url of the invitation we got from the server
func InvitationSetUrlInfo(invitationId string, url string, expiry int64) {

	for i := 0; i < len(client.GetConfig().GetIdentity().Peers); i++ {
		if client.GetConfig().GetIdentity().Peers[i].InvitationId == invitationId {
			client.GetConfig().GetIdentity().Peers[i].InvitationUrl = url
			client.GetConfig().GetIdentity().Peers[i].InvitationExpiry = time.Unix(expiry, 0)
			break
		}
	}
	client.GetConfig().GetIdentity().Save()

}