import ctypes
import os
import os.path as osp
import datetime
from util import no_parents,get_drives
from config import config

FORCE_ADMIN = not config.getboolean('global','no_admin',fallback=False)


def is_admin():
    return ctypes.windll.shell32.IsUserAnAdmin() != 0

EXE_PATH = os.path.expandvars(r"%userprofile%\portables"
                              r"\foldertimeupdate"
                              r"\FolderTimeUpdate.exe"
                              )

def update_mtimes(starts):
    if not is_admin() and FORCE_ADMIN:
        raise Exception("Process must be admin")
    for start in starts:
        subprocess.check_call([EXE_PATH,'/stext','null','/BaseFolder',start])

def build(after,starts):
    if isinstance(after,datetime.datetime):
        after = after.timestamp()
    var_unsubbed =  map(osp.expandvars,starts)
    abs_paths = map(osp.abspath,var_unsubbed)
    starts = list(no_parents(abs_paths))
    ret = []
    for path in starts:
        for root,dirs,files in os.walk(path,topdown=True):
            try:
                dirs[:] = list(filter(
                    lambda p: osp.getmtime(osp.join(root,p)) > after,
                    dirs
                    ))
                ret += [osp.join(root,file) for file in files]
            except:
                print('Error',root,sep= ': ')
    return ret

def build_ext(ext,paths):
    ret = []
    for path in paths:
        if path.endswith(ext):
            name = osp.basename(path)
            try:
                ret[name].append(path)
            except KeyError:
                ret.append([name,path])
    return ret

def update(after,*starts,update_mtimes = False):
    if update_mtimes:
        update_mtimes(starts)
    return build(after,starts)