import re
import os
import sys
from Param import *

class BadParamError(Exception):
  pass

class Params(object):
    def __init__(self, **kwargs):
      for key, value in kwargs.items():
        setattr(self, key, value)
    
    def __iter__(self):
        for key, value in vars(self).iteritems():
           yield key, value

    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)))

    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 definitions_import(self, def_dict, classkwargs, classname=""):
      value = None
      for key in def_dict.keys():
        try: 
          value = None
          if key in classkwargs:
            value = classkwargs[key]
          elif 'default' in def_dict[key]:
            value = def_dict[key]['default']
          if def_dict[key]['type'] == "bool":
            instance = ParamBool(value, classname=classname)
          elif def_dict[key]['type'] == "color":
            instance = ParamColor(value, classname=classname)
          elif def_dict[key]['type'] == "enum":
            instance = ParamEnum(value, enum_values=def_dict[key]['enum_values'], classname=classname)
          elif def_dict[key]['type'] == "float":
            instance = ParamFloat(value, classname=classname)
          elif def_dict[key]['type'] == "img_url":
            instance = ParamImg_url(value, key=key, classname=classname)
          elif def_dict[key]['type'] == "int":
            instance = ParamInt(value, classname=classname)
          elif def_dict[key]['type'] == "json":
            instance = ParamJson(value, classname=classname)
          elif def_dict[key]['type'] == "raw":
            instance = ParamRaw(value, classname=classname)
          elif def_dict[key]['type'] == "string":
            instance = ParamString(value, classname=classname)
          self.__setattr__(key, instance) 
        except Exception as e:
          self.err_warn("key: %s value: %s" % (key, str(def_dict[key])), error=str(e))