from django.http import HttpResponse, Http404
from django.conf import settings

def csspp(request, css):
	
	try:
		f = open("%s/%s.css" % (settings.CSS_DIR, css))
		css = f.read().strip("\n").strip()
		f.close()
	except:
		raise Http404
	
	css_dict = {}

	for line in [line.strip() for line in css.split("}") if line.find("{") > 0]:
		selector = line.split("{")[0].strip()
		line = line.split("{")[1].strip()
		rules = {}
		rule_list = [rule.strip() for rule in line.split(";") if rule.find(":") > 0]
		for rule in rule_list:
			prop = rule.split(":")[0].strip()
			value = rule.split(":")[1].strip()
			if value.startswith("$"):
				value = css_dict["@variables"][value]
			rules[prop] = value
		css_dict[selector] = rules

	for selector in [selector for selector in css_dict if selector.endswith(")") and selector.find("(") > 0]:
		old_selector = selector
		selector = selector.split("(")[0]
		css_dict[selector] = css_dict[old_selector]
		for extend in old_selector.split("(")[1].split(")")[0].split(","):
			try:
				if css_dict[extend]:
					for rule in css_dict[extend]:
						css_dict[selector][rule] = css_dict[extend][rule]
			except:
				pass
		del css_dict[old_selector]
	
	try:
		del css_dict["@variables"]
	except:
		pass

	css = ""

	for selector in css_dict:
		css += selector+" { "
		for rule in css_dict[selector]:
			css += "%s: %s; " % (rule, css_dict[selector][rule])
		css += "} \n"

	return HttpResponse(css, mimetype="text/css; charset=utf-8")