import path from 'path';
import dotenv from 'dotenv';
import dotenvExpand from 'dotenv-expand';
import process from 'process';
import { fileURLToPath } from 'url';
export const trimSlashes = (dirPath: string) => {
  return dirPath.replace(/^[\/\\]|[\/\\]$/g, '');
};

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

export interface ProcessEnv {
    GOOGLE_ADSENSE_ADS_TXT?: string;
    GOOGLE_ANALYTICS_GTAG?: string;
    SITE_URL?: string;
}

export interface Config {
    GoogleAdsenseAdsTxt: string;
    GoogleAnalyticsGTag: string;
    siteUrl: string;
}

const env: ProcessEnv = {};
let dotEnvConfig = dotenv.config({
    path: path.resolve(process.cwd(), '.env'),
    processEnv: env as dotenv.DotenvPopulateInput
});
dotEnvConfig = dotenvExpand.expand({
    parsed: env as dotenvExpand.DotenvParseInput,
    processEnv: process.env as dotenvExpand.DotenvParseInput
});

export const getGoogleAnalyticsGtag = () => (env.GOOGLE_ANALYTICS_GTAG||``).trim();
export const getGoogleAdsenseAdsTxt = () => (env.GOOGLE_ADSENSE_ADS_TXT||``).trim()||`google.com, pub-1234567890abcdef, DIRECT, fedcba9876543210`;
export const getSiteUrl = () => trimSlashes(env.SITE_URL||`http://localhost`);

export const config: Config = {
    GoogleAnalyticsGTag: getGoogleAnalyticsGtag(),
    GoogleAdsenseAdsTxt: getGoogleAdsenseAdsTxt(),
    siteUrl: getSiteUrl(),
};