from Messages import IMessage

## A network id message invites another participant to a site
#
## This can be sent in response to a ClientMsg
class NetworkIdMsg(IMessage):
    id = 0xA1
    length = 2

    ## Create a network id message
    #
    # @param network_id The network id assigned to the remote participant.
    def __init__(self, network_id):
        self.network_id = None
        if isinstance(network_id, int):
            self.network_id = network_id
        elif isinstance(network_id, bytes):
            self.network_id = network_id[1]

    ## Serialize the message into the given buffer
    #
    ## @param buffer_ref A reference to the buffer to use. This should be a list with the buffer as its first and only element
    ## @returns the length of the message
    def Serialize(self, buffer_ref):
        if self.network_id is None:
            return 0
        
        buffer: bytearray = buffer_ref[0]
        buffer[0:NetworkIdMsg.length] = [
            NetworkIdMsg.id,
            self.network_id
        ]
        return NetworkIdMsg.length

    # def SendTo(participant, network_id):
    #     if network_id is None:
    #         return 0
        
    #     participant.buffer[0:2] = [
    #         NetworkIdMsg.id,
    #         network_id
    #     ]
    #     return NetworkIdMsg.length