/**
 * @file Tests for codex-home.js: CODEX_HOME resolution and related path
 * resolutions for Codex project and surface directories.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const path = require("node:path");
const os = require("node:os");

const { describe, it, beforeEach } = require("node:test");
const assert = require("node:assert/strict");

describe("codex-home", () => {
  beforeEach(() => {
    // Clear the require cache so getCodexHome() reads the fresh env var
    delete require.cache[require.resolve("../lib/codex-home")];
  });

  it("honours CODEX_HOME over the home directory", () => {
    process.env.CODEX_HOME = "/tmp/injected-codex";
    delete require.cache[require.resolve("../lib/codex-home")];
    assert.equal(require("../lib/codex-home").getCodexHome(), "/tmp/injected-codex");
  });

  it("puts the project surfaces under <cwd>/.codex", () => {
    const { getProjectCodexDir } = require("../lib/codex-home");
    assert.equal(getProjectCodexDir("/repo"), path.join("/repo", ".codex"));
  });

  it("returns the cwd as the project root", () => {
    const { getProjectRoot } = require("../lib/codex-home");
    assert.equal(getProjectRoot("/repo"), "/repo");
  });

  it("defaults to ~/.codex when CODEX_HOME is not set", () => {
    delete process.env.CODEX_HOME;
    delete require.cache[require.resolve("../lib/codex-home")];
    const { getCodexHome } = require("../lib/codex-home");
    assert.equal(getCodexHome(), path.join(os.homedir(), ".codex"));
  });
});