import os
import os.path

import hserver

class TemplateModule:

	def __init__(self,path,parent=None):
		self.__path = path
		self.__parent = parent
		
		self.__children = {}
		self.__altchildren = {}
		
		self.__load()
		
	def __load(self):
		if not os.path.exists( self.__path ):
			return
		
		l = os.listdir( self.__path )
		for fn in l:
			p = "%s/%s" % (self.__path, fn)
			
			o = None
			if os.path.isdir( p ):
				o = TemplateModule( p, self)
			elif (os.path.isfile( p )):
				o = hserver.Template( template=fn, base=self.__path, provider=self)
				
			if not o is None:
				self.__children[ fn ] = o
				self.__altchildren[ self.transform(fn) ] = o

				
	def transform(self,name):
		if not name[0].isalpha():
			name = "_%s" % (name,)
			
		return name.replace(".","_")
			
	def __getattr__(self,name):
		if not ((name in self.__children) or (name in self.__altchildren)):
			self.__load()
			
		if name in self.__children:
			return self.__children[name]
		if name in self.__altchildren:
			return self.__altchildren[name]
		raise AttributeError("%s not found in %s" % (name,self))
		
	def __getitem__(self,name):
		if not ((name in self.__children) or (name in self.__altchildren)):
			self.__load()

		if name in self.__children:
			return self.__children[name]
		if name in self.__altchildren:
			return self.__altchildren[name]
		raise IndexError("%s not found in %s" % (name,self))		
		
	def provide(self,name):
		s = name.split("/")
		if len(s) > 1:
			return self[s[0]].provide("/".join(s[1:]))
		return self[s[0]]
	
	def __str__(self):
		cl = []
		for c in self.__children:
			cl.append( c )
	
		return "<TemplateModule (%s)>" % (", ".join(cl))