import json

def replace_token_versions(config_file, target_version):

"""

Replaces authentication token values in a configuration file

for isolated environments with support for older versions.

Args:

config_file (str): Path to the configuration file (JSON).

target_version (str): The version to replace tokens with.

"""

try:

with open(config_file, 'r') as f:

config = json.load(f)

# Iterate through the config and replace tokens. Adjust keys as needed.

for env in config.get('environments', []):

if env.get('name') == 'isolated': # Check for the isolated environment

for key, value in env.items():

if isinstance(value, str) and 'token' in key.lower(): # Check for token-related keys

env[key] = f"token_{target_version}"

# Write the modified config back to the file

with open(config_file, 'w') as f:

json.dump(config, f, indent=4)

print(f"Tokens in {config_file} updated to version {target_version} for isolated environment.")

except FileNotFoundError:

print(f"Error: Configuration file not found: {config_file}")

except json.JSONDecodeError:

print(f"Error: Invalid JSON format in {config_file}")

except Exception as e:

print(f"An unexpected error occurred: {e}")

if __name__ == '__main__':

# Example usage:

replace_token_versions('config.json', 'v1')