import { describe, it, expect } from "vitest";
import { isUnderRoot, selectionRejection } from "../src/workspacePath";

describe("isUnderRoot", () => {
  const root = "/a/vscode-cowriting-plugin/sandbox";

  it("accepts the root itself and files inside it", () => {
    expect(isUnderRoot(root, root)).toBe(true);
    expect(isUnderRoot(`${root}/docs/x.md`, root)).toBe(true);
  });

  it("rejects files outside the root", () => {
    expect(isUnderRoot("/a/other/x.md", root)).toBe(false);
  });

  it("rejects a SIBLING whose path is a string-prefix of the root's parent (the prefix-collision bug)", () => {
    // The reported case: EDH root is .../vscode-cowriting-plugin/sandbox, the file
    // is in the sibling content repo. Plain startsWith on the plugin-repo prefix
    // would falsely match; the separator boundary must reject it.
    const pluginRoot = "/a/vscode-cowriting-plugin";
    const contentFile = "/a/vscode-cowriting-plugin-content/issues/x.md";
    expect(contentFile.startsWith(pluginRoot)).toBe(true); // the latent bug
    expect(isUnderRoot(contentFile, pluginRoot)).toBe(false); // fixed
  });
});

describe("selectionRejection", () => {
  const root = "/ws";
  const ok = { hasEditor: true, selectionEmpty: false, scheme: "file", fsPath: "/ws/a.md", root };

  it("returns null when everything is valid", () => {
    expect(selectionRejection(ok)).toBeNull();
  });

  it("names the missing editor", () => {
    const msg = selectionRejection({ ...ok, hasEditor: false });
    expect(msg).toMatch(/focus a text editor/i);
  });

  it("names the empty selection (only when there IS an editor)", () => {
    const msg = selectionRejection({ ...ok, selectionEmpty: true });
    expect(msg).toMatch(/select some text/i);
  });

  it("names an unsaved/non-file document", () => {
    const msg = selectionRejection({ ...ok, scheme: "untitled" });
    expect(msg).toMatch(/save this document/i);
  });

  it("names an out-of-workspace file (the reported bug — NOT a selection problem)", () => {
    const msg = selectionRejection({ ...ok, fsPath: "/elsewhere/a.md" });
    expect(msg).toMatch(/outside your workspace folder/i);
    expect(msg).not.toMatch(/select some text/i);
  });
});