from dataclasses import dataclass

VBAN_SERVICE_RTPACKETREGISTER=32
VBAN_SERVICE_RTPACKET=33
MAX_PACKET_SIZE = 1436
HEADER_SIZE = (4+1+1+1+1+16+4)

@dataclass
class VBAN_VMRT_Packet_Data:
    """ RT Packet Data """
    _voicemeeterType: bytes
    _reserved: bytes
    _buffersize: bytes
    _voicemeeterVersion: bytes
    _optionBits: bytes
    _samplerate: bytes
    _inputLeveldB100: bytes
    _outputLeveldB100: bytes  
    _TransportBit: bytes
    _stripState: bytes
    _busState: bytes
    _stripGaindB100Layer1: bytes
    _stripGaindB100Layer2: bytes
    _stripGaindB100Layer3: bytes
    _stripGaindB100Layer4: bytes
    _stripGaindB100Layer5: bytes
    _stripGaindB100Layer6: bytes
    _stripGaindB100Layer7: bytes
    _stripGaindB100Layer8: bytes
    _busGaindB100: bytes
    _stripLabelUTF8c60: bytes
    _busLabelUTF8c60: bytes

    @property
    def voicemeetertype(self) -> str:
        """ returns voicemeeter type as a string """
        type_ = ('basic', 'banana', 'potato')
        return type_[int.from_bytes(self._voicemeeterType, 'little')-1]
    @property
    def voicemeeterversion(self) -> tuple:
        """ returns voicemeeter version as a string """
        return tuple(reversed(tuple(int.from_bytes(self._voicemeeterVersion[i:i+1], 'little') for i in range(4))))
    @property
    def samplerate(self) -> int:
        """ returns samplerate as an int """
        return int.from_bytes(self._samplerate, 'little')
    @property
    def inputlevels(self) -> tuple:
        """ returns the entire level array across all inputs """
        return tuple(((1 << 16) - 1) - int.from_bytes(self._inputLeveldB100[i:i+2], 'little') for i in range(0, 68, 2))
    @property
    def outputlevels(self) -> tuple:
        """ returns the entire level array across all outputs """
        return tuple(((1 << 16) - 1) - int.from_bytes(self._outputLeveldB100[i:i+2], 'little') for i in range(0, 128, 2))
    @property
    def stripstate(self) -> tuple:
        """ returns tuple of strip states accessable through bit modes """
        return tuple(self._stripState[i:i+4] for i in range(0, 32, 4))
    @property
    def busstate(self) -> tuple:
        """ returns tuple of bus states accessable through bit modes """
        return tuple(self._busState[i:i+4] for i in range(0, 32, 4))

    """ 
    these functions return an array of gainlayers[i] across all strips 
    ie stripgainlayer1 = [strip[0].gainlayer[0], strip[1].gainlayer[0], strip[2].gainlayer[0]...]
    """    
    @property
    def stripgainlayer1(self) -> tuple:
        return tuple(((1 << 16) - 1) - int.from_bytes(self._stripGaindB100Layer1[i:i+2], 'little') for i in range(0, 16, 2))
    @property
    def stripgainlayer2(self) -> tuple:
        return tuple(((1 << 16) - 1) - int.from_bytes(self._stripGaindB100Layer2[i:i+2], 'little') for i in range(0, 16, 2))
    @property
    def stripgainlayer3(self) -> tuple:
        return tuple(((1 << 16) - 1) - int.from_bytes(self._stripGaindB100Layer3[i:i+2], 'little') for i in range(0, 16, 2))
    @property
    def stripgainlayer4(self) -> tuple:
        return tuple(((1 << 16) - 1) - int.from_bytes(self._stripGaindB100Layer4[i:i+2], 'little') for i in range(0, 16, 2))
    @property
    def stripgainlayer5(self) -> tuple:
        return tuple(((1 << 16) - 1) - int.from_bytes(self._stripGaindB100Layer5[i:i+2], 'little') for i in range(0, 16, 2))
    @property
    def stripgainlayer6(self) -> tuple:
        return tuple(((1 << 16) - 1) - int.from_bytes(self._stripGaindB100Layer6[i:i+2], 'little') for i in range(0, 16, 2))
    @property
    def stripgainlayer7(self) -> tuple:
        return tuple(((1 << 16) - 1) - int.from_bytes(self._stripGaindB100Layer7[i:i+2], 'little') for i in range(0, 16, 2))
    @property
    def stripgainlayer8(self) -> tuple:
        return tuple(((1 << 16) - 1) - int.from_bytes(self._stripGaindB100Layer8[i:i+2], 'little') for i in range(0, 16, 2))

    @property
    def busgain(self) -> tuple:
        """ returns tuple of bus gains """
        return tuple(((1 << 16) - 1) - int.from_bytes(self._busGaindB100[i:i+2], 'little') for i in range(0, 16, 2))
    @property
    def striplabels(self) -> tuple:
        """ returns tuple of strip labels """
        return tuple(self._stripLabelUTF8c60[i:i+60].decode().strip('\x00') for i in range(0, 480, 60))
    @property
    def buslabels(self) -> tuple:
        """ returns tuple of bus labels """
        return tuple(self._busLabelUTF8c60[i:i+60].decode().strip('\x00') for i in range(0, 480, 60))

@dataclass
class VBAN_VMRT_Packet_Header:
    """ RT PACKET header (expected from Voicemeeter server) """
    name='Voicemeeter-RTP'
    timeout=15
    vban: bytes='VBAN'.encode()
    format_sr: bytes=(0x60).to_bytes(1, 'little')
    format_nbs:	bytes=(0).to_bytes(1, 'little')
    format_nbc:	bytes=(VBAN_SERVICE_RTPACKET).to_bytes(1, 'little')
    format_bit: bytes=(0).to_bytes(1, 'little')
    streamname: bytes=name.encode('ascii') + bytes(16-len(name))

    @property
    def header(self):
        header  = self.vban
        header += self.format_sr
        header += self.format_nbs
        header += self.format_nbc
        header += self.format_bit
        header += self.streamname
        assert len(header) == HEADER_SIZE-4, f'Header expected {HEADER_SIZE-4} bytes'
        return header

@dataclass
class RegisterRTHeader:
    """ REGISTER RT PACKET header """
    name='Register RTP'
    timeout=15
    vban: bytes='VBAN'.encode()
    format_sr: bytes=(0x60).to_bytes(1, 'little')
    format_nbs:	bytes=(0).to_bytes(1, 'little')
    format_nbc:	bytes=(VBAN_SERVICE_RTPACKETREGISTER).to_bytes(1, 'little')
    format_bit: bytes=(timeout & 0x000000FF).to_bytes(1, 'little') # timeout
    streamname: bytes=name.encode('ascii') + bytes(16-len(name))
    framecounter: bytes=(0).to_bytes(4, 'little')

    @property
    def header(self):
        header  = self.vban
        header += self.format_sr
        header += self.format_nbs
        header += self.format_nbc
        header += self.format_bit
        header += self.streamname
        header += self.framecounter
        assert len(header) == HEADER_SIZE, f'Header expected {HEADER_SIZE} bytes'
        return header

@dataclass
class TextRequestHeader:
    """ VBAN-TEXT request header """
    name='Command1'
    vban: bytes='VBAN'.encode()
    sr: bytes=(0x52).to_bytes(1, 'little')
    nbs: bytes=(0).to_bytes(1, 'little')
    nbc: bytes=(0).to_bytes(1, 'little')
    bit: bytes=(0x10).to_bytes(1, 'little')
    streamname: bytes=name.encode() + bytes(16-len(name))
    framecounter: bytes=(0).to_bytes(4, 'little')

    @property
    def header(self):
        header  = self.vban
        header += self.sr
        header += self.nbs
        header += self.nbc
        header += self.bit
        header += self.streamname
        header += self.framecounter
        assert len(header) == HEADER_SIZE, f'Header expected {HEADER_SIZE} bytes'
        return header