class EWAssayParam:
	'''
	An EWAssayParam is a container for a parameter.  A parameter can be any type of data.
	'''	

	def __init__(self, name, value=None, default=None, description=None, summary=None, question=None):
		'''
		Parameters have values, and optional default values and descriptions
		'''
		self.name = str(name)
		self.data = value
		self.default = None
		self.summary = summary
		self.description = description
		self.question = question

	def value():
		def fget(self):
			print "Fgetting in the superclass"
			return self.data
		
		def fset(self, value):
			print "Fsetting in the superclass"
			self.data = value

		return locals()
	value = property(**value())


	def validate(self):
		return True

	def __repr__(self):
		return "<EWAssayParam data='%s'>" % repr(self.data)

	def __str__(self):
		return repr(self)


class EWAssayIntParam(EWAssayParam):
	'''
	Integer parameter
	'''
	def __init__(self, name, value, default=None, description=None, summary=None, question=None):
		EWAssayParam.__init__(self, name, value=int(value), default=default, description=description, summary=summary, question=question)
		self.min = None
		self.max = None

	def __value():
		def fget(self):
			print "Fgetting data"
			return self.data
		
		def fset(self, value):
			print "Fsetting data"
			self.data = int(value)

		return locals()
	value = property(**__value())


	def validate(self):
		if self.min != None and self.value < min:
			return False

		if self.max != None and self.value > max:
			return False
		
		return True

class EWAssayFloatParam(EWAssayParam):
	'''
	Floating-point parameter
	'''
	def __init__(self, value, default=None, description=None, summary=None, question=None):
		EWAssayParam.__init__(self, value=float(value), default=default, description=description, summary=summary, question=question)
		self.min = None
		self.max = None

	def validate(self):
		if self.min != None and self.value < min:
			return False

		if self.max != None and self.value > max:
			return False
		
		return True

class EWAssayStringParam(EWAssayParam):
	'''
	String parameter
	'''
	def __init__(self, value, default=None, description=None, summary=None, question=None):
		EWAssayParam.__init__(self, value=str(value), default=default, description=description, summary=summary, question=question)


class EWAssayFileParam(EWAssayParam):
	'''
	File parameter
	'''
	def __init__(self, value, default=None, description=None, summary=None, question=None):
		EWAssayParam.__init__(self, value=str(value), default=default, description=description, summary=summary, question=question)

class EWAssayChoiceParam(EWAssayParam):
	'''
	Choose from a list
	'''
	def __init__(self, value, choices, default=None, description=None, summary=None, question=None):
		EWAssayParam.__init__(self, value=int(value), default=default, description=description, summary=summary, question=question)
		self.choices = []
		for choice in choices:
			self.choices.append(str(choice))

	def validate(self):
		return self.value in range(len(self.choices))

class EWAssayBoolParam(EWAssayParam):
	'''
	Boolean (T/F) parameter
	'''
	def __init__(self, value, default=None, description=None, summary=None, question=None):
		EWAssayParam.__init__(self, value=bool(value), default=default, description=description, summary=summary, question=question)
		self.trueMessage = str(True)
		self.falseMessage = str(False)

	
	
class EWAssayParamGroup:
	'''
	Represents a group of parameters.
	Use like this:
	group1 = EWAssayParamGroup()
	group1["Sample Rate"] = EWAssayIntParam(40)
	group1["Integration Time"] = EWAssayFloatParam(0.4)
	...etc...
	'''
	def __init__(self, name, description=None, summary=None):
		self.name = str(name)
		self.description = description
		self.summary = summary
		self.params = []
		self.__params_dict = {}

	def __setitem__(self, x, y):
		self.__params_dict[str(x)] = y

	def __getitem__(self, x):
		return self.__params_dict[x]

	def __repr__(self):
		return "<EWAssayParamGroup %s: %d parameters>" % (self.name, len(self.params))

	def __str__(self):
		return repr(self)