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

# ---------------------------------------------------------
# CONFIGURATION
# ---------------------------------------------------------
ADOBE_CDN_URL = "https://cdn-patchportal-one.comodo.com/portal/packages/spm/Adobe%20Acrobat/x64/AcroRdrDCx642500120997_MUI.exe"

INSTALL_ARGS = "/sAll /rs /rps /msi /norestart /quiet EULA_ACCEPT=YES"

UNINSTALL_CMD = "MsiExec.exe /X{AC76BA86-1033-FF00-7760-BC15014EA700} /qn"

# ---------------------------------------------------------
# Disable WOW64 filesystem redirection
# ---------------------------------------------------------
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)

# ---------------------------------------------------------
# Execute command (waits until completion)
# ---------------------------------------------------------
def ecmd(cmd):
    with disable_file_system_redirection():
        p = subprocess.Popen(
            cmd,
            shell=True,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE
        )
        p.communicate()
        return p.returncode


# ---------------------------------------------------------
# SAFE CLEANUP (NO FORCE DELETE)
# ---------------------------------------------------------
def safe_cleanup():
    paths = [
        r"C:\Users\Public\Desktop\Adobe Acrobat DC.lnk",
        r"C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Adobe Acrobat DC.lnk",
        r"C:\Program Files\Adobe\Acrobat DC"
    ]

    for p in paths:
        try:
            if os.path.isfile(p):
                os.remove(p)
            elif os.path.isdir(p):
                if not os.listdir(p):   # remove only if empty
                    os.rmdir(p)
        except:
            pass

# ---------------------------------------------------------
# Download installer from CDN
# ---------------------------------------------------------
def download_installer(url, dst, retries=3):
    for _ in range(retries):
        try:
            req = Request(url, headers={'User-Agent': 'Mozilla/5.0'})
            ctx = ssl._create_unverified_context()
            res = urlopen(req, context=ctx, timeout=60)

            with open(dst, 'wb') as f:
                while True:
                    data = res.read(1024 * 1024)
                    if not data:
                        break
                    f.write(data)

            if os.path.exists(dst) and os.path.getsize(dst) > 5 * 1024 * 1024:
                return True
        except:
            time.sleep(20)
    return False

# ---------------------------------------------------------
# INSTALL
# ---------------------------------------------------------
def spm_install(dir, args):
    temp = os.environ.get("TEMP", "C:\\Windows\\Temp")
    installer = os.path.join(temp, "AdobeAcrobatDC_x64.exe")

    if not download_installer(ADOBE_CDN_URL, installer):
        print "retcode1retcode"
        return

    rc = ecmd('"%s" %s' % (installer, INSTALL_ARGS))
    print "retcode" + str(rc) + "retcode"

    try:
        os.remove(installer)
    except:
        pass

# ---------------------------------------------------------
# UNINSTALL
# ---------------------------------------------------------
def spm_uninstall(dir, args):
    rc = ecmd(UNINSTALL_CMD)
    time.sleep(20)
    safe_cleanup()
    print "retcode" + str(rc) + "retcode"

# ---------------------------------------------------------
# UPDATE (ORDER AS REQUESTED)
# ---------------------------------------------------------
def spm_update(dir, args):
    spm_uninstall(dir, args)
    time.sleep(10)
    safe_cleanup()
    spm_install(None, None)