import assert from "node:assert/strict";
import { mkdtempSync, rmSync, writeFileSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import test from "node:test";
import { loadDotEnv } from "./env.js";

test("loadDotEnv loads missing keys from .env without overriding", () => {
  const dir = mkdtempSync(join(tmpdir(), "ticketlab-env-"));
  const key = `TICKETLAB_ENV_TEST_${Date.now()}`;
  try {
    writeFileSync(join(dir, ".env"), `${key}=from-file\n# comment\nOTHER=1\n`, "utf8");
    delete process.env[key];
    loadDotEnv(dir);
    assert.equal(process.env[key], "from-file");

    process.env[key] = "already-set";
    writeFileSync(join(dir, ".env"), `${key}=should-not-win\n`, "utf8");
    loadDotEnv(dir);
    assert.equal(process.env[key], "already-set");
  } finally {
    delete process.env[key];
    rmSync(dir, { recursive: true, force: true });
  }
});