import * as fs from 'fs/promises';
import * as path from 'path';
import { ModelsConfig } from '../types/models/modelsConfig.js';
/**
* Loads and validates the models configuration from a JSON file.
*
* @param configPath The relative path to the configuration file.
* @returns A promise that resolves with the validated ModelsConfig object.
* @throws Error if the file cannot be read, parsed, or does not contain the required model levels.
*/
export async function loadModelsConfig(
configPath: string
): Promise<ModelsConfig> {
const absolutePath = path.resolve(configPath);
try {
const fileContent = await fs.readFile(absolutePath, 'utf-8');
const config = JSON.parse(fileContent);
// Basic validation for required levels
if (!config.fast || !config.smart || !config.cheap) {
throw new Error(
'Invalid configuration: Missing one or more required model levels (fast, smart, cheap).'
);
}
return config as ModelsConfig;
} catch (error: any) {
console.error(
`Error loading models configuration from ${absolutePath}:`,
error.message
);
if (error.code === 'ENOENT') {
throw new Error(`Configuration file not found at ${absolutePath}`);
} else if (error instanceof SyntaxError) {
throw new Error(
`Invalid JSON format in configuration file ${absolutePath}`
);
} else {
// Rethrow other errors (validation error, etc.)
throw error;
}
}
}
