import re
import os
import time
import sys
import urllib, urllib2
from subprocess import Popen, PIPE
Request = urllib2.Request
urlencode = urllib.urlencode
urlopen = urllib2.urlopen

from Config import WORKING_DIR, MAX_SIZE, \
  SPECIAL_DOWNLOADERS, SPECIAL_DOWNLOADERS_MAX_SIZE, \
  BIN_IDENTIFY

class BadParamError(Exception):
  pass

class Params(object):
    def __init__(self, classname="", **kwargs):
      self._working_dir = WORKING_DIR
      self._now = kwargs.get("now", str(int(time.time())));
      self._classname = classname 
      for key, value in kwargs.items():
        setattr(self, key, value)
    
    def __iter__(self):
        for key, value in vars(self).iteritems():
           yield key, value

    def err_warn(self, s, error=None):
      self._error_log(s, error=error);
      raise BadParamError("%s - %s" % (self._classname, s))
   
    def __getattr__(self, key):
      try: 
        return self.__getattribute__(key);
      except AttributeError:
        return None

    def err_fatal(self, s, error=None):
      self._log(s, error, fatal=True);
      sys.exit(1);

    def set_val(self, key, value, value_type=None, enum_values=None):
      try:
        self.__setattr__(key, value) 
      except Exception as e:
        self.err_warn("key: %s value: %s" % (key, value), error=str(e))


    def _error_log(self, s, error=None, fatal=False):
      message = "ERROR - BAD PARAM"
      if fatal: message += "- [FATAL] -"
      sys.stderr.write("{}:{} - {}\n".format(message, self._classname, s))
      if error:
        sys.stderr.write("PARAM ERROR: {}\n".format(str(error)))