#!/usr/bin/env python

import ConfigParser
import sys


if len(sys.argv)!=3:
	print "USAGE:"
	print "\tltsmerger global_ltsconf local_ltsconf"
	sys.exit(0)


def is_inside_tuple(tuple_list,value):
	
	pos=0
	for t in tuple_list:
		if value in t:
			return [True,pos]
		pos+=1
		
	return [False,None]
	
#def is_inside_tuple


try:

	global_cfg = ConfigParser.ConfigParser()
	global_cfg.optionxform=str
	global_cfg.read(sys.argv[1])

	local_cfg = ConfigParser.ConfigParser()
	local_cfg.optionxform=str
	local_cfg.read(sys.argv[2])

	for section in local_cfg.sections():
		for item in local_cfg.items(section):
			k,v=item
			if global_cfg.has_section(section) and global_cfg.has_option(section,k):
				global_cfg.remove_option(section,k)
				

	new_cfg={}
	new_cfg["Default"]=[]

	cfg_list=[global_cfg,local_cfg]


	for cfg in cfg_list:

		if len(cfg.defaults())>0:
			defaults=cfg.defaults().items()
			for option in defaults:
				ret,pos=is_inside_tuple(new_cfg["Default"],option[0])
				if ret:
					new_cfg["Default"][pos]=(new_cfg["Default"][pos][0],option[1])
				else:
					new_cfg["Default"].append(option)
					
				# ConfgParser DEFAULT values appear in every section. 
				# In our case, we don't want them in other sections
				
				cfg.remove_option("DEFAULT",option[0])
			
		for section in cfg.sections():
			if section not in new_cfg and section.lower()!="default":
				new_cfg[section]=[]
				
			for option in cfg.items(section):
				if section.lower()=="default":
					section="Default"
		
				ret,pos=is_inside_tuple(new_cfg[section],option[0])
				if ret:
					new_cfg[section][pos]=(new_cfg[section][pos][0],option[1])
				else:
					new_cfg[section].append(option)



	print "[Default]"
	for option in new_cfg["Default"]:
		print "%s = %s"%(option[0],option[1])
	
	for section in new_cfg:
		if section.lower() != "default":
			print "[%s]"%section
			for option in new_cfg[section]:
				print "%s = %s"%(option[0],option[1])
			
except Exception as e:
	
	print "# Exception when merging lts.conf files"
	print "# Exception: ", str(e).strip('\n')
	print "[Default]"