import { config as loadEnv } from 'dotenv';
import { z } from 'zod';
// Load .env file
loadEnv();
const configSchema = z.object({
// Server
port: z.coerce.number().int().positive().default(3000),
baseUrl: z.string().url(),
// Google OAuth
googleClientId: z.string().min(1),
googleClientSecret: z.string().min(1),
oauthRedirectUri: z.string().url(),
// Security
tokenEncryptionKey: z.string().min(32, 'TOKEN_ENCRYPTION_KEY must be at least 32 characters'),
jwtSecret: z.string().min(32, 'JWT_SECRET must be at least 32 characters'),
// Database
dbUrl: z.string().default('./data/gmail-mcp.db'),
// CORS
allowedOrigins: z.string().optional().transform((val) =>
val ? val.split(',').map(s => s.trim()).filter(Boolean) : []
),
});
export type Config = z.infer<typeof configSchema>;
function loadConfig(): Config {
const env = {
port: process.env['PORT'],
baseUrl: process.env['BASE_URL'],
googleClientId: process.env['GOOGLE_CLIENT_ID'],
googleClientSecret: process.env['GOOGLE_CLIENT_SECRET'],
oauthRedirectUri: process.env['OAUTH_REDIRECT_URI'],
tokenEncryptionKey: process.env['TOKEN_ENCRYPTION_KEY'],
jwtSecret: process.env['JWT_SECRET'],
dbUrl: process.env['DB_URL'],
allowedOrigins: process.env['ALLOWED_ORIGINS'],
};
const result = configSchema.safeParse(env);
if (!result.success) {
const errors = result.error.issues.map(
(issue) => ` ${issue.path.join('.')}: ${issue.message}`
);
throw new Error(`Configuration validation failed:\n${errors.join('\n')}`);
}
return result.data;
}
// Lazy initialization - config is loaded on first access
let _config: Config | null = null;
export function getConfig(): Config {
if (!_config) {
_config = loadConfig();
}
return _config;
}
// For testing - allows resetting config
export function resetConfig(): void {
_config = null;
}
