# TinyTuya Module
# -*- coding: utf-8 -*-

from . import command_types as CT

# Protocol Versions and Headers
PROTOCOL_VERSION_BYTES_31 = b"3.1"
PROTOCOL_VERSION_BYTES_33 = b"3.3"
PROTOCOL_VERSION_BYTES_34 = b"3.4"
PROTOCOL_VERSION_BYTES_35 = b"3.5"
PROTOCOL_3x_HEADER = 12 * b"\x00"
PROTOCOL_33_HEADER = PROTOCOL_VERSION_BYTES_33 + PROTOCOL_3x_HEADER
PROTOCOL_34_HEADER = PROTOCOL_VERSION_BYTES_34 + PROTOCOL_3x_HEADER
PROTOCOL_35_HEADER = PROTOCOL_VERSION_BYTES_35 + PROTOCOL_3x_HEADER
MESSAGE_HEADER_FMT = MESSAGE_HEADER_FMT_55AA = ">4I"  # 4*uint32: prefix, seqno, cmd, length [, retcode]
MESSAGE_HEADER_FMT_6699 = ">IHIII"  # 4*uint32: prefix, unknown, seqno, cmd, length
MESSAGE_RETCODE_FMT = ">I"  # retcode for received messages
MESSAGE_END_FMT = MESSAGE_END_FMT_55AA = ">2I"  # 2*uint32: crc, suffix
MESSAGE_END_FMT_HMAC = ">32sI"  # 32s:hmac, uint32:suffix
MESSAGE_END_FMT_6699 = ">16sI"  # 16s:tag, suffix
PREFIX_VALUE = PREFIX_55AA_VALUE = 0x000055AA
PREFIX_BIN = PREFIX_55AA_BIN = b"\x00\x00U\xaa"
SUFFIX_VALUE = SUFFIX_55AA_VALUE = 0x0000AA55
SUFFIX_BIN = SUFFIX_55AA_BIN = b"\x00\x00\xaaU"
PREFIX_6699_VALUE = 0x00006699
PREFIX_6699_BIN = b"\x00\x00\x66\x99"
SUFFIX_6699_VALUE = 0x00009966
SUFFIX_6699_BIN = b"\x00\x00\x99\x66"

NO_PROTOCOL_HEADER_CMDS = [CT.DP_QUERY, CT.DP_QUERY_NEW, CT.UPDATEDPS, CT.HEART_BEAT, CT.SESS_KEY_NEG_START, CT.SESS_KEY_NEG_RESP, CT.SESS_KEY_NEG_FINISH, CT.LAN_EXT_STREAM ]