from enum import Enum, auto


class InputReport:
    def __init__(self):
        self.data = [0x00] * 50
        # all input reports are prepended with 0xA1
        self.data[0] = 0xA1

    def set(self, input_report_id, timer=0x00):
        self.data[1] = input_report_id
        self.data[2] = timer % 256
        # battery level + connection info
        self.data[3] = 0x8E

        # Todo: Button status, analog stick data, vibrator input

        # ACK byte for subcmd reply
        self.data[14] = 0x82

        # Reply-to subcommand ID
        self.data[14] = 0x02

    def sub_0x2_device_info(self, mac, fm_version=(0x03, 0x48), controller=0x01):
        """
        Sub command 0x02 request device info response.

        :param mac: Controller MAC address in Big Endian (6 Bytes)
        :param fm_version: TODO
        :param controller: 1=Left Joy-Con, 2=Right Joy-Con, 3=Pro Controller
        """
        if len(fm_version) != 2:
            raise ValueError('Firmware version must consist of 2 bytes!')
        elif len(mac) != 6:
            raise ValueError('Bluetooth mac address must consist of 6 bytes!')

        # reply to sub command ID
        self.data[14] = 0x02

        # sub command reply data
        offset = 15
        self.data[offset: offset + 1] = fm_version
        self.data[offset + 2] = controller
        self.data[offset + 3] = 0x02
        self.data[offset + 4: offset + 9] = mac
        self.data[offset + 10] = 0x01
        self.data[offset + 11] = 0x01

    def __bytes__(self):
        return bytes(self.data)


class SubCommand(Enum):
    REQUEST_DEVICE_INFO = auto()
    NOT_IMPLEMENTED = auto()


class OutputReport:
    def __init__(self, data):
        if data[0] != 0xA2:
            raise ValueError('Output reports must start with 0xA2')
        self.data = data

    def sub_command(self):
        if self.data[11] == 0x02:
            return SubCommand.REQUEST_DEVICE_INFO
        else:
            return None

    def __bytes__(self):
        return bytes(self.data)