"""
HEX格式文件以行为单位记录数据，每行都由任意数量的十六进制数组成。

每一行的格式如下：

：本行数据长度(2byte)+数据起始地址(4byte)+数据类型(2byte)+数据内容(N byte)+校验(1byte)
"""

from aenum import IntEnum
import binascii

HEX_LEN_H = 1
HEX_LEN_L = 2

HEX_ADDR_HH = 3
HEX_ADDR_HL = 4
HEX_ADDR_LH = 5
HEX_ADDR_LL = 6

HEX_DATA_TYPE_H = 7
HEX_DATA_TYPE_L = 8

HEX_DATA_START = 9

HexTable = {
    48: 0,
    49: 1,
    50: 2,
    51: 3,
    52: 4,
    53: 5,
    54: 6,
    55: 7,
    56: 8,
    57: 9,
    65: 10,
    66: 11,
    67: 12,
    68: 13,
    69: 14,
    70: 15
}


class HexDataType(IntEnum):
    DataRecord = 0
    FileEnd = 1
    ExtentionAddr = 2
    StartSectionAddr = 3
    ExtentionLinearAddr = 4
    StartLinearSectionAddr = 3


class Hex_read(object):

    def __init__(self):
        self.start_addr = 0
        self.len = 0
        self.data = b''

    def Open_file(self, file):
        self.file = file
        self.start_addr = 0
        self.len = 0
        self.data = b''

        with open(file, 'rb') as fd:
            for aLineData in fd:
                if aLineData[0] == 0x3A:  # 0x3A == ":"
                    # print(aLineData)
                    DataLen = HexTable[aLineData[HEX_LEN_H]] * 16 + HexTable[
                        aLineData[HEX_LEN_L]]
                    Data_Addr = HexTable[
                        aLineData[HEX_ADDR_HH]] * 16 * 16 * 16 + HexTable[
                            aLineData[HEX_ADDR_HL]] * 16 * 16 + HexTable[
                                aLineData[HEX_ADDR_LH]] * 16 + HexTable[
                                    aLineData[HEX_ADDR_LL]]
                    Data_Type = HexTable[
                        aLineData[HEX_DATA_TYPE_H]] * 16 + HexTable[
                            aLineData[HEX_DATA_TYPE_L]]
                    if Data_Type == HexDataType.FileEnd:
                        break
                    if Data_Type == HexDataType.ExtentionLinearAddr:
                        self.start_addr = HexTable[aLineData[
                            HEX_DATA_START]] << 28 | HexTable[aLineData[
                                HEX_DATA_START + 1]] << 20 | HexTable[
                                    aLineData[HEX_DATA_START +
                                              2]] << 12 | HexTable[aLineData[
                                                  HEX_DATA_START + 3]] << 4
                        # print(self.start_addr)
                    if Data_Type == HexDataType.DataRecord:
                        if self.len == 0:
                            self.start_addr += Data_Addr
                        self.len += DataLen
                        self.data += aLineData[HEX_DATA_START:HEX_DATA_START +
                                               DataLen * 2]

            fd.close()
            self.data = binascii.a2b_hex(self.data)

            # print(len(self.data))
            # print(self.start_addr)
            # print(bin_file[0:20])