import { config as loadDotenv, type DotenvConfigOptions } from "dotenv";
import { env } from 'node:process';

/**
 * Load a .env file from the CWD with the given options (or defaults), returns the new value of process.env
 * @param dotenvOptions 
 * @param overrides 
 * @returns 
 */
export function getEnv(dotenvOptions?: DotenvConfigOptions, overrides?: NodeJS.ProcessEnv): NodeJS.ProcessEnv {
    loadDotenv(dotenvOptions);

    if (overrides)
        Object.assign(env, overrides);

    return env;
}

/**
 * Get the value from the given env var. If undefined, load .env from CWD and try again or return undefined.
 * @param envVar 
 * @returns 
 */
export function getEnvVarValue(envVar: string): string | undefined {
    let value = env[envVar];
    if (!value) {
        try {
            loadDotenv();
        }
        catch (err) {
            console.error(String(err))
        }
        value = env[envVar];
    }
    return value;
}