from Messages import IMessage

## A client message announces the presence of a participant
#
## When received by another participant, it can be followed by a NetworkIdMsg
## to announce that participant to this client such that it can join privately
class ClientMsg(IMessage):
    id = 0xA0
    length = 2

    ## Create a Client message
    #
    # @param network_id The network id of the local participant. Use 0 if it is unknown
    def __init__(self, network_id):
        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 buffer_ref is None or self.network_id is None:
            return 0
        
        buffer: bytearray = buffer_ref[0]
        buffer[0:ClientMsg.length] = [
            ClientMsg.id,
            self.network_id
        ]
        return ClientMsg.length

    # @staticmethod
    # def Serialized(buffer_ref, network_id):
    #     if buffer_ref is None or network_id is None:
    #         return 0
        
    #     buffer: bytearray = buffer_ref[0]
    #     buffer[0:ClientMsg.length] = [
    #         ClientMsg.id,
    #         network_id
    #     ]
    #     return ClientMsg.length
    
    ## Send the network_id to the participant
    # def SendTo(participant, network_id):
    #     if participant is None or network_id is None:
    #         return False

    #     participant.buffer[0:2] = [
    #         ClientMsg.id,
    #         network_id
    #     ]
    #     participant.SendBuffer(ClientMsg.length)

    ## Publish the network_id     
    # def Publish(participant, network_id):
    #     if participant is None or network_id is None:
    #         return False

    #     participant.buffer[0:2] = [
    #         ClientMsg.id,
    #         network_id
    #     ]
    #     participant.PublishBuffer(ClientMsg.length)