import os
import subprocess
import ctypes
import ssl
import time
from urllib2 import Request, urlopen

WEBEX_INSTALLER_URL = "https://cdn-patchportal-one.comodo.com/portal/packages/spm/Webex/x64/Webex_46.4.0.34620.msi"

class disable_file_system_redirection:
    _disable = ctypes.windll.kernel32.Wow64DisableWow64FsRedirection
    _revert = ctypes.windll.kernel32.Wow64RevertWow64FsRedirection
    def __enter__(self):
        self.old_value = ctypes.c_long()
        self.success = self._disable(ctypes.byref(self.old_value))
    def __exit__(self, type, value, traceback):
        if self.success:
            self._revert(self.old_value)

def ecmd(command):
    with disable_file_system_redirection():
        process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        out, err = process.communicate()
        return out.strip() + err.strip()

def get_webex_guid():
    cmd = 'wmic product where "Name=\'Webex\'" get IdentifyingNumber'
    result = ecmd(cmd)
    lines = result.splitlines()
    guids = [line.strip() for line in lines if line.strip().startswith("{") and line.strip().endswith("}")]
    if guids:
        return guids[0]
    return None

def spm_uninstall(dir, args):
    guid = get_webex_guid()
    if not guid:
        return
    ecmd('msiexec /x %s /qn /norestart' % guid)
    time.sleep(5)

def download_installer(file_path, url):
    headers = {'User-Agent': 'Mozilla/5.0'}
    request = Request(url, headers=headers)
    try:
        context = ssl._create_unverified_context()
        response = urlopen(request, context=context)
        with open(file_path, 'wb') as f:
            while True:
                chunk = response.read(1024 * 100)
                if not chunk:
                    break
                f.write(chunk)
        return True
    except:
        return False

def spm_install(dir, args):
    temp_path = os.environ.get("TEMP", "C:\\Windows\\Temp")
    file_name = WEBEX_INSTALLER_URL.split("/")[-1]
    local_path = os.path.join(temp_path, file_name)
    if not download_installer(local_path, WEBEX_INSTALLER_URL):
        return
    ecmd('msiexec /i "%s" /qn /norestart' % local_path)
    try:
        os.remove(local_path)
    except:
        pass
    time.sleep(5)

def spm_update(dir, args):
    spm_uninstall(None, None)
    time.sleep(50)
    spm_install(None, None)