import sys

def fix_indentation(file_path):
 with open(file_path, 'r', encoding='utf-8') as f:
  lines = f.readlines()
 
 fixed_lines = []
 indent_map = {0: 0}
 
 for i, line in enumerate(lines):
  stripped = line.lstrip()
  if not stripped:
   fixed_lines.append('\n')
   continue
  
  old_indent = len(line) - len(stripped)
  
  # Remove larger indents from map if we dedent below them
  for k in list(indent_map.keys()):
   if k > old_indent:
    del indent_map[k]
  
  if old_indent not in indent_map:
   # Find the closest smaller indent
   known = sorted([k for k in indent_map.keys() if k < old_indent])
   parent_new = indent_map[max(known)]
   indent_map[old_indent] = parent_new + 1
  
  new_indent = indent_map[old_indent]
  fixed_lines.append(' ' * new_indent + stripped)
 
 with open(file_path, 'w', encoding='utf-8') as f:
  f.writelines(fixed_lines)

if __name__ == '__main__':
 fix_indentation('src/app_controller.py')
 print("Indentation fixed v3.")