import { getExpirationInSeconds } from "#lib/utils";
import { validateJWTConfig } from "#lib/validation";

import type { JWTConfig } from "#types/config";

function createJWTConfig(): JWTConfig {
	const jwtSecret = process.env.JWT_SECRET || "";
	const jwtExpiration = process.env.JWT_EXPIRATION || "1h";
	const jwtIssuer = process.env.JWT_ISSUER || "";
	const jwtAlgorithm = process.env.JWT_ALGORITHM || "HS256";

	const configForValidation: JWTConfig = {
		secret: jwtSecret,
		expiration: getExpirationInSeconds(jwtExpiration),
		issuer: jwtIssuer,
		algorithm: jwtAlgorithm,
	};

	const validation = validateJWTConfig(configForValidation);

	if (!validation.valid) {
		throw new Error(`JWT Configuration Error: ${validation.error}`);
	}

	return configForValidation;
}

export const jwt = createJWTConfig();