var fs = require('node:fs');
var path = require('node:path');
var dotEnv = require('dotenv');
var dotenvExpand = require('dotenv-expand');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var fs__default = /*#__PURE__*/_interopDefaultLegacy(fs);
var path__default = /*#__PURE__*/_interopDefaultLegacy(path);
var dotEnv__default = /*#__PURE__*/_interopDefaultLegacy(dotEnv);

/**
 * Setup environment variables from .env files based on NODE_ENV
 * @param rootPath - root path for the .env files
 * @param debug - dotEnv debug flag
 * @returns list of loaded files
 */
function setupEnv(rootPath, {
  envVar = "NODE_ENV",
  debug = false,
  onLoad
} = {}) {
  const resolvedEnv = (process.env[envVar] || "").toLowerCase();
  if (!resolvedEnv) {
    throw new Error(`Environment variable ${envVar} is not set`);
  }
  let files = [`.env.${resolvedEnv}.local`, ".env.local", `.env.${resolvedEnv}`, ".env"];
  if (resolvedEnv === "test") {
    files = files.filter(file => !file.includes(".local"));
  }
  const loaded = [];
  for (const file of files) {
    const fullPath = path__default["default"].normalize(`${rootPath}/${file}`);
    if (fs__default["default"].existsSync(fullPath)) {
      loaded.push(file);
      const result = dotEnv__default["default"].config({
        path: fullPath,
        override: false,
        debug
      });
      if (onLoad) {
        onLoad({
          path: rootPath,
          filename: file,
          result
        });
      }
    }
  }
  // @ts-expect-error - process.env string index signature
  dotenvExpand.expand({
    ignoreProcessEnv: true,
    parsed: process.env
  });
  return loaded;
}

exports.setupEnv = setupEnv;
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