import {getValArg} from './types';

export async function getVal(ctx: getValArg, path: string, delay?: number): Promise<any> {
    const {host} = ctx;
    if (host === undefined)
        return path;
    switch(path){
        case '.':
        case '$0':
            return host;
    }
    if(path.startsWith('?.')){
        const qSplit = path.split('??');
        let deflt = qSplit[1];
        const {splitExt} = await import('./splitExt.js');
        const dSplit = splitExt(qSplit[0].trim());
        const { getProp } = await import('./getProp.js');
        if(delay !== undefined) await sleep(delay);
        let val = await getProp(host, dSplit);
        if (val === undefined && deflt) {
            deflt = deflt.trim();
            if (deflt[0] === ".") {
                return await getVal(ctx!, deflt);
            }
            else {
                return deflt;
            }
        }
        return val;
    }else{
        return (<any>host)[path];
    }

        

}

function sleep(delay: number) : Promise<void>{
    return new Promise((resolve) => {
        setTimeout(() => {
            resolve();
        }, delay);
    })
}