from pathlib import Path
from sys import platform
from yaml import load, dump
import os
import sys
import re
import collections.abc

_config={}
_files=[]
_configloaded = False

_LOCATIONS = {
    '_YAMLCONFPATH':{
        '_DIR':[
            "{}/owo/".format(os.environ["XDG_CONFIG_HOME"]) if "XDG_CONFIG_HOME" in os.environ else str(Path.home())+"/.config/owo/",
            "{}/".format(os.environ["XDG_CONFIG_HOME"]) if "XDG_CONFIG_HOME" in os.environ else str(Path.home())+"/.config/",
            str(Path('~').resolve()),
            str(Path().resolve())
        ],
        '_FNAME_RE': 
            r"([ou^>]w[ou^<]|config)\.(ya?ml|c(on)?fi?g?)$"
    }

}

def _mDC_listMatches(inp: str) -> list:
  "\n".join(os.listdir(inp))
  return re.findall(
    _LOCATIONS['_YAMLCONFPATH']['_FNAME_RE'],
    inp
  )

def _makeDefaultConfs() -> list:
  locates=[]
  for x in _LOCATIONS['_YAMLCONFPATH']['_DIR']:
    locates+=_mDC_listMatches(x)
  return locates

def _updateConf(toAdd: dict):
  _config.update(toAdd)

def _loadConfigFile(path: str):
  try:
    file = Path(path)

    if file.exists() and not file.is_dir():
      try:
        conf = yaml.load(file.read_text())
      except Exception as exc:
        raise exc
      else:
        if not _config:
          _config = conf
        else:
          _updateConf(conf)
          if file not in _files:
            _files+str(file)
  except Exception as exc:
    print(exc)
    import traceback
    traceback.print_exc(file=sys.stderr)

def initConfig(path: str = None) -> bool:
    if _configloaded:
        return True# If config already loaded, do not reload.
    else:
        _toLookIn=_makeDefaultConfs()+path
        for loc in _toLookIn:
          _loadConfigFile(loc)