#!/usr/bin/env python3

import fileinput
import glob
import os
from lxml import etree as ET

class StyleFixer:
  def fix_template_style(template_path):
    changes = [
      ["version='1.0'", 'version="1.0"'],
      ["'UTF-8'", '"utf-8"']
    ]
    StyleFixer.sed(template_path, changes)

  def sed(path, changes):
    for line in fileinput.input(path, inplace=True):
      for change in changes:
        line = line.replace(change[0], change[1])
      print(line, end="")

class TemplateFixer:
  def __init__(self, vfs_root):
    self.template_folder = os.path.join(vfs_root, 'simulation', 'templates')

  def fix_template(self, template_path):
    tree = ET.parse(template_path)
    root = tree.getroot()

    changed = False
    cmp_identity = root.find('Identity')
    if cmp_identity != None:
      if self.fix_requirements(cmp_identity):
        changed = True

    cmp_upgrade = root.find('Upgrade')
    if cmp_upgrade != None:
      for upgrade in cmp_upgrade.iterfind("./"):
        if self.fix_requirements(upgrade):
          changed = True

    if not changed:
      return False

    root[:] = sorted(root, key=lambda x: x.tag)
    ET.indent(tree)

    tree.write(template_path, xml_declaration=True, pretty_print=True, encoding='utf-8')
    return True

  def fix_requirements(self, cmp):
    req_tech = cmp.find('RequiredTechnology')
    if req_tech == None:
      return False

    ET.SubElement(ET.SubElement(cmp, 'Requirements'), 'Techs').text = req_tech.text

    cmp.remove(req_tech)

    return True

  def run(self):
    for template in glob.iglob(self.template_folder + '/**/*.xml', recursive=True):
      if self.fix_template(template):
        StyleFixer.fix_template_style(template)

if __name__ == '__main__':
  script_dir = os.path.dirname(os.path.realpath(__file__))
  template_fixer = TemplateFixer(script_dir)
  template_fixer.run()