import { describe, expect, it } from "vitest";

import {
  GLOBAL_NAV_ITEMS,
  isNavItemActive,
  navSections,
  projectNavItems,
  type NavItem,
} from "./items";

const PID = "p1";

describe("projectNavItems", () => {
  it("builds the ten project entries scoped to the project id", () => {
    const items = projectNavItems(PID);

    expect(items).toHaveLength(10);
    expect(items.map((i) => i.key)).toEqual([
      "write",
      "outline",
      "foreshadow",
      "review",
      "chains",
      "style",
      "codex",
      "toolbox",
      "rules",
      "skills",
    ]);
    expect(items.every((i) => i.href.startsWith(`/projects/${PID}/`))).toBe(
      true,
    );
  });
});

describe("navSections", () => {
  it("returns only the unlabeled global section outside a project", () => {
    const sections = navSections();

    expect(sections).toHaveLength(1);
    expect(sections[0]?.label).toBeNull();
    expect(sections[0]?.items).toEqual(GLOBAL_NAV_ITEMS);
  });

  it("groups project entries under the four labeled sections (P2-1)", () => {
    const sections = navSections(PID);

    // 全局组（无标题）+ 写作 / 资料库 / 审阅 / 更多。
    expect(sections.map((s) => s.label)).toEqual([
      null,
      "写作",
      "资料库",
      "审阅",
      "更多",
    ]);

    const byLabel = (label: string): (string | undefined)[] =>
      sections.find((s) => s.label === label)?.items.map((i) => i.key) ?? [];

    expect(byLabel("写作")).toEqual(["write"]);
    expect(byLabel("资料库")).toEqual([
      "outline",
      "codex",
      "foreshadow",
      "style",
    ]);
    expect(byLabel("审阅")).toEqual(["review", "chains"]);
    expect(byLabel("更多")).toEqual(["toolbox", "rules", "skills"]);
  });

  it("places every project entry exactly once (no dropped or duplicated links)", () => {
    const sections = navSections(PID);
    const grouped = sections
      .filter((s) => s.label !== null)
      .flatMap((s) => s.items.map((i) => i.key));
    const flat = projectNavItems(PID).map((i) => i.key);

    expect([...grouped].sort()).toEqual([...flat].sort());
    expect(grouped).toHaveLength(flat.length);
  });
});

describe("isNavItemActive", () => {
  const write: NavItem = {
    href: `/projects/${PID}/write`,
    label: "写作",
    key: "write",
  };

  it("matches a project item by its activeNav key regardless of pathname", () => {
    expect(
      isNavItemActive(write, { pathname: "/anything", activeNav: "write" }),
    ).toBe(true);
  });

  it("matches a project item by exact pathname when no activeNav given", () => {
    expect(isNavItemActive(write, { pathname: `/projects/${PID}/write` })).toBe(
      true,
    );
  });

  it("does not match a project item when neither key nor path align", () => {
    expect(isNavItemActive(write, { pathname: "/", activeNav: "outline" })).toBe(
      false,
    );
  });

  it("matches a global item by exact pathname only", () => {
    const works = GLOBAL_NAV_ITEMS[0];
    if (!works) throw new Error("expected GLOBAL_NAV_ITEMS[0]");
    expect(isNavItemActive(works, { pathname: "/" })).toBe(true);
    expect(isNavItemActive(works, { pathname: "/projects/p1/write" })).toBe(
      false,
    );
  });

  it("ignores activeNav for global items (no key)", () => {
    const settings = GLOBAL_NAV_ITEMS[1];
    if (!settings) throw new Error("expected GLOBAL_NAV_ITEMS[1]");
    expect(
      isNavItemActive(settings, { pathname: "/", activeNav: "write" }),
    ).toBe(false);
  });
});
