import random
import struct
import socket

class stringandip (object):
    def __init__(self):
        pass
    def ipv4(self,m, n, x):
        if m == '-1':
            m = random.randint(0, 255)
        if n == '-1':
            n = random.randint(0, 255)
        if x == '-1':
            x = random.randint(0, 255)
        y = random.randint(0, 255)
        print(str(m) + '.' + str(n) + '.' + str(x) + '.' + str(y))
        return str(m) + '.' + str(n) + '.' + str(x) + '.' + str(y)

    def dec2hex(self,string_num):
        base = [str(x) for x in range(10)] + [chr(x) for x in range(ord('A'), ord('A') + 6)]
        num = int(string_num)
        mid = []
        while True:
            if num == 0: break
            num, rem = divmod(num, 16)
            mid.append(base[rem])

        return ''.join([str(x) for x in mid[::-1]])

    def ipv6(self):
        ipInt = random.randint(0, 400000000000000000000000000000000000)
        ipStr = ''
        leftValue = ipInt

        for i in [7, 6, 5, 4, 3, 2, 1, 0]:
            string_num = leftValue / 65536 ** i
            base = [str(x) for x in range(10)] + [chr(x) for x in range(ord('A'), ord('A') + 6)]
            num = int(string_num)
            mid = []
            while True:
                if num == 0: break
                num, rem = divmod(num, 16)
                mid.append(base[rem])

            ipTokenInt = ''.join([str(x) for x in mid[::-1]])
            if (ipTokenInt == ''):
                ipTokenInt = 0
            ipStr = ipStr + str(ipTokenInt)
            if i != 0:
                ipStr = ipStr + ':'
            leftValue %= 65536 ** i
        print(ipStr)
        return ipStr

    def getstring(self,randomlength=16,base_str='ABCDEFGHIGKLMNOPQRSTUVWXYZabcdefghigklmnopqrstuvwxyz0123456789'):
        """
        生成一个指定长度的随机字符串
        """
        random_str = ''
        #base_str = 'ABCDEFGHIGKLMNOPQRSTUVWXYZabcdefghigklmnopqrstuvwxyz0123456789'
        length = len(base_str) - 1
        for i in range(randomlength):
            random_str += base_str[random.randint(0, length)]
        print(random_str)
        return random_str
# if __name__ == '__main__':
#     ipandstring = ipandstring()
#     print(ipandstring.ipv6())