import chardet
import platform
import re
import socket
import subprocess


def ping(host='', version=None):
    def shell_exec(cmd='', timeout=None):
        try:
            result = subprocess.run(
                cmd, shell=True,
                stdout=subprocess.PIPE, stderr=subprocess.DEVNULL, timeout=timeout)
            if result.stdout:
                return result.stdout.decode(chardet.detect(result.stdout)["encoding"] or 'UTF-8')
            return ''
        except Exception:
            return ''

    match version:
        case 4 | 6:
            version_ch = '\x20-' + str(version)
        case _:
            version_ch = ''
    match platform.system():
        case 'Windows':
            result = shell_exec('chcp 65001 && ping -n 1' + version_ch + ' ' + host, timeout=5)
        case _:
            result = shell_exec('ping -c 1' + version_ch + ' ' + host, timeout=5)
    delay = re.findall('([0-9.]+)[\s]?ms*', result)
    if len(delay) == 0:
        return False
    else:
        return round(float(delay[0]), 1)


def resolve(host='', version=None):
    result = []
    lst = []
    try:
        lst = socket.getaddrinfo(host, None)
    except:
        pass
    for value in lst:
        address = value[4][0]
        match value[0]:
            case socket.AddressFamily.AF_INET6:
                if version == 6 or version is None:
                    result.append(address)
            case _:
                if version == 4 or version is None:
                    result.append(address)
    return result


if __name__ == '__main__':
    # Example. PING IPv4 Test.
    print('PING:', ping('www.taobao.com', version=4), 'ms')
    # Example. PING IPv6 Test.
    print('PING:', ping('www.taobao.com', version=6), 'ms')
    # Example. PING Auto Test.
    print('PING:', ping('www.taobao.com'), 'ms')
    # Example. Resolve IPv4-Only Host.
    print(resolve('www.taobao.com', version=4))
    # Example. Resolve IPv6-Only Host.
    print(resolve('www.taobao.com', version=6))
    # Example. Resolve IPv4/6 Host.
    print(resolve('www.taobao.com'))