"use strict";

const test = require("node:test");
const assert = require("node:assert/strict");
const os = require("node:os");
const path = require("node:path");
const fs = require("node:fs/promises");
const { JsonFileStateStore, InMemoryStateStore } = require("../src/lib/state-store");

test("load returns null when state file does not exist", async () => {
  const tempDir = await fs.mkdtemp(path.join(os.tmpdir(), "xartaudio-state-test-"));
  const store = new JsonFileStateStore(path.join(tempDir, "missing.json"));

  const data = await store.load();
  assert.equal(data, null);
});

test("save and load roundtrip state", async () => {
  const tempDir = await fs.mkdtemp(path.join(os.tmpdir(), "xartaudio-state-test-"));
  const filePath = path.join(tempDir, "state.json");
  const store = new JsonFileStateStore(filePath);

  const expected = {
    version: 1,
    engine: {
      jobs: { "1": { id: "1", status: "completed" } },
      nextJobId: 2,
    },
  };

  await store.save(expected);
  const actual = await store.load();

  assert.deepEqual(actual, expected);
});

test("in memory state store roundtrips without filesystem", async () => {
  const store = new InMemoryStateStore();
  assert.equal(await store.load(), null);

  await store.save({ engine: { jobs: {} } });
  const loaded = await store.load();
  assert.deepEqual(loaded, { engine: { jobs: {} } });
});