import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
import * as os from "os";
import * as path from "path";
import { expandWorkspacesRoot } from "../../src/config/loader";

const HOME = os.homedir();
// Use an absolute path that is portable across Linux, macOS, and Windows.
// os.tmpdir() always returns an absolute path on all platforms.
const REPO_ROOT = path.join(os.tmpdir(), "fake-disclaw-repo");

describe("expandWorkspacesRoot", () => {
  beforeEach(() => {
    vi.spyOn(console, "warn").mockImplementation(() => undefined);
  });

  afterEach(() => {
    vi.restoreAllMocks();
  });

  it("(a) expands leading ~ to os.homedir() and resolves to absolute path", () => {
    const result = expandWorkspacesRoot("~/.disclaw/workspaces", REPO_ROOT);
    expect(result).toBe(path.resolve(HOME, ".disclaw", "workspaces"));
    expect(path.isAbsolute(result)).toBe(true);
  });

  it("(a) expands ~ with no trailing path to os.homedir()", () => {
    const result = expandWorkspacesRoot("~", REPO_ROOT);
    expect(result).toBe(path.resolve(HOME));
  });

  it("(b) leaves an already-absolute path unchanged (no double expansion)", () => {
    const absolute = path.join(HOME, ".disclaw", "workspaces");
    const result = expandWorkspacesRoot(absolute, REPO_ROOT);
    expect(result).toBe(absolute);
  });

  it("(c) resolves a relative path (without ~) against repoRoot to an absolute path", () => {
    const result = expandWorkspacesRoot("myworkspaces", REPO_ROOT);
    expect(result).toBe(path.join(REPO_ROOT, "myworkspaces"));
    expect(path.isAbsolute(result)).toBe(true);
  });

  it("(d) triggers console.warn when workspaces_root is inside the repo", () => {
    expandWorkspacesRoot("workspaces", REPO_ROOT);
    expect(console.warn).toHaveBeenCalledOnce();
    expect(console.warn).toHaveBeenCalledWith(
      expect.stringContaining("[DisClaw] WARNING")
    );
    expect(console.warn).toHaveBeenCalledWith(
      expect.stringContaining("CLAUDE.md")
    );
  });

  it("(d) does NOT warn when workspaces_root is outside the repo", () => {
    expandWorkspacesRoot("~/.disclaw/workspaces", REPO_ROOT);
    expect(console.warn).not.toHaveBeenCalled();
  });

  it("(d) does NOT warn when an absolute path outside the repo is given", () => {
    expandWorkspacesRoot("/tmp/disclaw-workspaces", REPO_ROOT);
    expect(console.warn).not.toHaveBeenCalled();
  });
});