import test from "node:test";
import assert from "node:assert/strict";
import { mkdtemp, readFile, writeFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import { resolve } from "node:path";
import { parseEnvFile, writeEnvFileUpdates } from "../src/ui/env-store.js";

test("parseEnvFile handles missing files", async () => {
  const root = await mkdtemp(resolve(tmpdir(), "ai-ops-env-store-"));
  const envPath = resolve(root, ".env");

  const parsed = await parseEnvFile(envPath);
  assert.deepEqual(parsed.values, {});
  assert.deepEqual(parsed.lines, []);
});

test("writeEnvFileUpdates merges and appends keys", async () => {
  const root = await mkdtemp(resolve(tmpdir(), "ai-ops-env-store-"));
  const envPath = resolve(root, ".env");

  await writeFile(envPath, "FOO=bar\nAGENT_MAX_CONCURRENT=4\n", "utf8");

  const updated = await writeEnvFileUpdates(envPath, {
    AGENT_MAX_CONCURRENT: "9",
    AGENT_RUNTIME_DISCORD_MIN_SEVERITY: "warning",
  });

  assert.equal(updated.values.FOO, "bar");
  assert.equal(updated.values.AGENT_MAX_CONCURRENT, "9");
  assert.equal(updated.values.AGENT_RUNTIME_DISCORD_MIN_SEVERITY, "warning");

  const rendered = await readFile(envPath, "utf8");
  assert.match(rendered, /AGENT_MAX_CONCURRENT=9/);
  assert.match(rendered, /AGENT_RUNTIME_DISCORD_MIN_SEVERITY=warning/);
});