#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2020/1/28 14:07
# @Author  : ywl
# @Email   : astralrovers@outlook.com
# @File    : commit-msg.py.py

import os
import sys
import re
import json


crc_list = (
    0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
    0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
    0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
    0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
    0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
    0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
    0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
    0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
    0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
    0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
    0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
    0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
    0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
    0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
    0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
    0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
    0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
    0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
    0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
    0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
    0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
    0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
    0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
    0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
    0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
    0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
    0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
    0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
    0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
    0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
    0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
    0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
)


def sum_crc16(crc, file_bit):
    """
    计算CRC16
    @param crc:初始校验码
    @param file_bit:文件2进制流
    @return:校验码
    """
    for bit in file_bit:
        crc = 0xffff & crc
        # temp = crc // 256
        temp  = crc >> 8
        crc = 0xffff & crc
        crc <<= 8
        crc = 0xffff & crc
        crc ^= crc_list[0xff & (temp ^ bit)]
    return crc


def sum_file_crc16(file_name):
    """
    计算文件校验码，每次计算4096字节
    @param file_name:文件名
    @return:校验码
    """
    crc = 0
    with open(file_name, 'rb') as f:
        crc = sum_crc16(crc, f.read())
    return crc


def get_version():
    with open("pack/release_version.json", "r+", encoding="utf8") as f:
        try:
            versions = json.load(f)
            return 'v' + versions["release_versions"][-1][-1]

        except Exception as e:
            print("读取版本失败 : ", e)
            exit(-1)


def get_srv_crc():
    srv_name = "src/AIService"
    if not os.path.exists(srv_name) or os.path.isdir(srv_name):
        print("no srv build AIService")
        exit(-1)

    return sum_file_crc16(srv_name)
    # crc = hex(sum_file_crc16(srv_name)).upper()[2:]
    # crc = '0' * (4 - len(crc)) + crc
    # return crc


def check_first_line(line):
    return re.match(r'\[version : [vV](0|[1-9][0-9]*.?)\.(0|[1-9][0-9]*.?)\.(0|[1-9][0-9]*.?)\] '
                    r'\[srv-crc16 : [0-9A-F]{4}\]$', line)


def add_pre_msg():
    commit_msg_file = sys.argv[1]

    with open(commit_msg_file, "r+") as f:
        text = list()

        while True:
            line = f.readline()

            if not line:
                break

            text.append(line)

        pre = "[version : %s] [srv-crc16 : %04X]\n" % (get_version(), get_srv_crc())

        if check_first_line(text[0]):
            text[0] = pre
        else:
            text.insert(0, pre)
        f.seek(0)
        f.truncate()
        f.writelines(text)


if __name__ == "__main__":
    add_pre_msg()
