import ctypes
import os
from subprocess import PIPE,Popen
import time
import shutil

start=time.time()
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 permissions(dirpath):
    mode=0o777
    if os.path.isdir(dirpath):
        try:
            for root,dirs,files in os.walk(dirpath,topdown=False):
                for dircs in [os.path.join(root,d) for d in dirs]:
                    os.chmod(dircs,mode)
                for s_file in [os.path.join(root,f) for f in files]:
                    os.chmod(s_file,mode)
        except Exception as E:
            print "File being Used %s"

def convert_bytes(size, unit=None):
    if unit == "KB":
        return (str(round(size / 1024, 3)))
    elif unit == "MB":
        return (str(round(size / (1024 * 1024), 3)))
    elif unit == "GB":
        return (str(round(size / (1024 * 1024 * 1024), 3)))
    else:
        return (str(size))
    
def size(path):
   
    #initialize the size
    total_size = 0
    
    #use the walk() method to navigate through directory tree
    for dirpath, dirnames, filenames in os.walk(path):
        for i in filenames:
            
            #use join to concatenate all the components of path
            f = os.path.join(dirpath, i)
            
            #use getsize to generate size in bytes and add it to the total size
            total_size += os.path.getsize(f)
    return total_size


users=os.popen("net user").read().split()[5:-4]
fil_users=[i.strip() for i in users if i.strip()!="Administrator" and i.strip()!="Guest"]
loggeduser=os.popen("whoami").read().split("\\")[1].strip()
n_fil_users=[]
for i in fil_users:
    if i.upper()!=loggeduser.upper():
        n_fil_users.append(i)
    else:
        pass
#desktop
path_desktop=[]
path_documents=[]
path_download=[]
for i in n_fil_users:
    value1="C:\\Users\\"+i+"\\Desktop"
    value2="C:\\Users\\"+i+"\\Documents"
    value3="C:\\Users\\"+i+"\\Downloads"
    #print value
    if os.path.exists(value1):
        path_desktop.append(value1)
        path_documents.append(value2)
        path_download.append(value3)
    else:
        pass
# print path_desktop
# print path_documents
# print path_download
#merged list
paths=[]
paths.extend(path_documents)
paths.extend(path_desktop)
paths.extend(path_download)
# print paths
for i in paths:
    j=size(i)
    print i+" size:"+convert_bytes(j,"MB")+" MB"

with disable_file_system_redirection():
    for i in paths:
        permissions(i)
        print "Removing files and folders %s"%i
        shutil.rmtree(i,ignore_errors=True)

#checking
print "Checking"
for i in paths:
    j=size(i)
    print i+" size:"+convert_bytes(j,"MB")+" MB"
end=time.time()
print "Execution time"
print end-start