"""Render only credential-ready routes; credentials remain environment references."""
import os
from pathlib import Path

import yaml


def build_config(catalog, env, exists):
    routes = []

    def add(alias, model, key=None, **params):
        if key:
            params['api_key'] = 'os.environ/' + key
        routes.append({'model_name': alias, 'litellm_params': {'model': model, **params}})

    for key, suffix in [('ZENMUX_SUBSCRIPTION_API_KEY', ''), ('ZENMUX_PAYG_API_KEY', '-payg')]:
        if env.get(key):
            for alias, model in catalog['zenmux'].items():
                # Strip only the LiteLLM provider prefix, retaining ZenMux's vendor prefix.
                add(alias + suffix, 'anthropic/' + model, key,
                    api_base='https://zenmux.ai/api/anthropic')
    if env.get('OPENROUTER_API_KEY'):
        for alias, model in catalog['openrouter'].items():
            add(alias, 'openrouter/' + model, 'OPENROUTER_API_KEY')
    if env.get('GOOGLE_AI_STUDIO_API_KEY'):
        for alias, model in catalog['google_ai_studio'].items():
            add(alias, 'gemini/' + model, 'GOOGLE_AI_STUDIO_API_KEY')
    for provider, token_var, default_dir in [
        ('chatgpt', 'CHATGPT_TOKEN_DIR', '/tokens/chatgpt'),
        ('xai', 'XAI_OAUTH_TOKEN_DIR', '/tokens/xai'),
    ]:
        if exists(Path(env.get(token_var, default_dir)) / 'auth.json'):
            for alias, model in catalog[provider].items():
                extra = {'use_xai_oauth': True} if provider == 'xai' else {}
                add(alias, provider + '/' + model, **extra)
    return {
        'model_list': routes,
        'general_settings': {
            'master_key': 'os.environ/LITELLM_MASTER_KEY',
            'database_url': 'os.environ/DATABASE_URL',
            'store_model_in_db': False,
        },
        'litellm_settings': {'drop_params': False, 'set_verbose': False},
        # No cross-provider or subscription-to-PAYG fallback without an explicit decision.
        'router_settings': {'num_retries': 1, 'timeout': 180},
    }


if __name__ == '__main__':
    catalog = yaml.safe_load(Path('/etc/litellm/models.yaml').read_text())
    config = build_config(catalog, os.environ, Path.is_file)
    output = Path('/tmp/litellm.yaml')
    output.write_text(yaml.safe_dump(config, allow_unicode=True, sort_keys=False))
    output.chmod(0o600)
    print('Configured routes:', ', '.join(route['model_name'] for route in config['model_list']))