import { ObjectTree } from "@weborigami/async-tree";
import assert from "node:assert";
import { describe, test } from "node:test";
import { handleExtension } from "../../src/runtime/handlers.js";

describe("handlers", () => {
  test("attaches an unpack method to a value with an extension", async () => {
    const fixture = createFixture();
    const numberValue = await fixture.get("foo");
    assert(typeof numberValue === "number");
    assert.equal(numberValue, 1);
    const jsonFile = await fixture.get("bar.json");
    const withHandler = await handleExtension(fixture, jsonFile, "bar.json");
    assert.equal(String(withHandler), `{ "bar": 2 }`);
    const data = await withHandler.unpack();
    assert.deepEqual(data, { bar: 2 });
  });

  test("immediately unpacks if key ends in slash", async () => {
    const fixture = createFixture();
    const jsonFile = await fixture.get("bar.json");
    const data = await handleExtension(fixture, jsonFile, "bar.json/");
    assert.deepEqual(data, { bar: 2 });
  });
});

function createFixture() {
  const parent = new ObjectTree({
    "json.handler": {
      unpack: (buffer) => JSON.parse(String(buffer)),
    },
  });
  let tree = new ObjectTree({
    foo: 1, // No extension, should be left alone
    "bar.json": `{ "bar": 2 }`,
  });
  tree.parent = parent;
  return tree;
}