#!/usr/bin/python2

print """
Variable Grabbler - version 2.5
-------------------------------"""

# definitions
import os, json, sys

if not len(sys.argv)==3:
  print >> sys.stderr, "Error: Exactly two arguments required: \"python variable_grabbler.py <file to be rewritten> <config file>\""
  sys.exit(1)

print "Reading config file...",
config_file = open(sys.argv[2],"r")
config_values = json.loads(config_file.read().decode("utf-8"))
config_file.close()
print "Done."

print "Working on file: "+sys.argv[1]
for variable in config_values:
  print variable,
  file_in = open(sys.argv[1], "r")
  file_content = file_in.read()
  file_in.close()
  file_out = open(sys.argv[1], "w")
  file_out.write(file_content.decode('utf-8').replace("%" + variable + "%", config_values[variable]).encode('utf-8'))
  file_out.close()
print "\nDone."