import { Router } from 'express';
import type { AnyAPIExecuter, APINamespace } from './defs.js';

export function buildAPISystem<N extends APINamespace, Q extends AnyAPIExecuter>(api: N | Q): Router {
    const router = Router();
    for (const [key, value] of Object.entries(api)) {
        if (typeof value === 'function') {
            const executer = new value() as Q;
            if (!executer.reqType) {
                throw new Error('APIExecuter.reqType is not defined');
            }
            router[executer.reqType](key, async (req, res) => {
                await executer.run(req, res);
            });
            continue;
        } else {
            router.use(key, buildAPISystem(value));
        }
    }
    return router;
}