import socket
from threading import Lock

import compLib.CompLib_pb2 as CompLib_pb2


class CompLibClient(object):
    UNIX_SOCKET_PATH = "/tmp/compLib"
    TCP_SOCKET_HOST = ""
    TCP_SOCKET_PORT = 9090
    SOCKET = None
    LOCK = Lock()

    @staticmethod
    def use_unix_socket(socket_path="/tmp/compLib"):
        CompLibClient.UNIX_SOCKET_PATH = socket_path

        CompLibClient.SOCKET = socket.socket(
            socket.AF_UNIX, socket.SOCK_STREAM)
        CompLibClient.SOCKET.connect(CompLibClient.UNIX_SOCKET_PATH)

        from compLib.HealthCheck import HealthUpdater
        HealthUpdater.start()

    @staticmethod
    def use_tcp_socket(socket_host, socket_port=TCP_SOCKET_PORT):
        CompLibClient.TCP_SOCKET_HOST = socket_host
        CompLibClient.TCP_SOCKET_PORT = socket_port

        CompLibClient.SOCKET = socket.socket(
            socket.AF_INET, socket.SOCK_STREAM)
        CompLibClient.SOCKET.connect(
            (CompLibClient.TCP_SOCKET_HOST, CompLibClient.TCP_SOCKET_PORT))

        from compLib.HealthCheck import HealthUpdater
        HealthUpdater.start()

    @staticmethod
    def send(data: bytes, size: int) -> bytes:
        with CompLibClient.LOCK:
            if CompLibClient.SOCKET is None:
                CompLibClient.use_unix_socket()

            CompLibClient.SOCKET.sendall(size.to_bytes(1, byteorder='big'))
            CompLibClient.SOCKET.sendall(data)

            response_size_bytes = CompLibClient.SOCKET.recv(1)
            response_size = int.from_bytes(
                response_size_bytes, byteorder="big")
            # print(response_size)

            response_bytes = CompLibClient.SOCKET.recv(response_size)
            # print(response_bytes.hex())
            # print(len(response_bytes))

            CompLibClient.check_response(response_bytes)

            return response_bytes

    @staticmethod
    def check_response(response_bytes: bytes) -> bool:
        # print(f"{response_bytes}")
        res = CompLib_pb2.GenericResponse()
        res.ParseFromString(response_bytes)

        if res.status.successful:
            return True

        # TODO: Log error message if unsuccessful
        return False