import log4js from "logger";

interface IConfig {

}

const defaultConfig: IConfig = {

}

const logger = log4js.getLogger("ERROR");

function assertRequiredContext(
    event: { context: Record<string, unknown> },
    keys: string[],
) {
    for (const key of keys) {
        if (!event.context[key]) {
            throw new Error(`event.context.${key} is not initialized`);
        }
    }
}

export const defineWrappedResponseHandler = <T extends EventHandlerRequest, D>(
    handlerOrConfig?: EventHandler<T, D> | IConfig,
    _handler?: EventHandler<T, D>,
): EventHandler<T, D> => {
    const handler = typeof handlerOrConfig === 'function' ? handlerOrConfig : _handler;
    if (!handler) {
        throw new Error('handler or config is required');
    }
    Object.assign({ ...defaultConfig }, typeof handlerOrConfig === 'object' ? handlerOrConfig : {});

    return defineEventHandler<T>(async (event) => {
        try {
            assertRequiredContext(event, ["auth", "config"]);
            const response = await handler(event)
            return response
        } catch (error) {
            logger.error(
                event?.method ?? "",
                event?.path ?? "(no request)",
                `[request]`,
                "\n",
                error
            );
            throw error
        }
    })
}