import type { IFileLoader } from '../index';
import { access, readFile } from 'graceful-fs';
import { promisify } from 'util';
const readFileP = promisify(readFile);
const accessP = promisify(access);

export default class FileSystemLoader implements IFileLoader {
    async loadFile(filePath: string): Promise<string> {
        return readFileP(filePath, 'utf-8');
    }
    async exists(filePath: string): Promise<boolean> {
        try {
            await accessP(filePath);
            return true;
        } catch {
            return false;
        }
    }
    async loadJS(filePath: string): Promise<any> {
        delete require.cache[filePath];
        // eslint-disable-next-line @typescript-eslint/no-var-requires
        return Promise.resolve(require(filePath));
    }
}