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

// Mock chrome.storage.local before importing the module under test.
const store: Record<string, unknown> = {};

vi.stubGlobal("chrome", {
  storage: {
    local: {
      get: vi.fn(async (key: string | string[]) => (Array.isArray(key)
        ? Object.fromEntries(key.map((item) => [item, store[item]]))
        : { [key]: store[key] })),
      set: vi.fn(async (entries: Record<string, unknown>) => {
        Object.assign(store, entries);
      }),
      remove: vi.fn(async (key: string | string[]) => {
        for (const item of Array.isArray(key) ? key : [key]) delete store[item];
      }),
    },
  },
});

// Import after globals are stubbed so the module captures the mock.
const {
  PEACH_VERSION,
  RELEASES,
  importantReleasesSince,
  selectImportantReleases,
  pendingImportantReleases,
  recordInstalledVersion,
  hasReleaseNotes,
  shouldShowWhatsNew,
  markWhatsNewSeen,
} = await import("./release-notes");

describe("release-notes", () => {
  beforeEach(() => {
    Object.keys(store).forEach((k) => delete store[k]);
    vi.clearAllMocks();
  });

  it("PEACH_VERSION is a non-empty string", () => {
    expect(typeof PEACH_VERSION).toBe("string");
    expect(PEACH_VERSION.length).toBeGreaterThan(0);
  });

  it("RELEASES has a versioned breaking V4 entry", () => {
    const breaking = RELEASES.find((release) => release.importance === "breaking");
    expect(breaking).toBeDefined();
    expect(breaking!.notes.some((note) => note.body.toLowerCase().includes("android"))).toBe(true);
    expect(breaking!.notes.some((note) => note.body.toLowerCase().includes("revoke") && note.body.toLowerCase().includes("pair"))).toBe(true);
  });

  it("hasReleaseNotes returns true when notes exist", () => {
    expect(hasReleaseNotes()).toBe(true);
  });

  it("combines every important release newer than the installed version", () => {
    expect(importantReleasesSince("5.0.0").map((release) => release.version)).toEqual(["5.1.3"]);
  });

  it("combines several important patches across a skipped upgrade interval", () => {
    const selected = selectImportantReleases([
      { version: "3.0.0", releasedAt: "2026-03-03", importance: "critical", notes: [] },
      { version: "2.1.0", releasedAt: "2026-02-02", notes: [] },
      { version: "2.0.0", releasedAt: "2026-02-01", importance: "breaking", notes: [] },
      { version: "1.5.0", releasedAt: "2026-01-15", importance: "critical", notes: [] },
    ], "1.0.0", "3.0.0");
    expect(selected.map((release) => release.version)).toEqual(["3.0.0", "2.0.0", "1.5.0"]);
  });

  it("shouldShowWhatsNew returns true when an important release was skipped", async () => {
    store["peach_release_notes_from"] = "5.0.0";
    expect(await shouldShowWhatsNew()).toBe(true);
  });

  it("routine patches do not show the interruptive view", async () => {
    store["peach_release_notes_from"] = "5.2.4";
    expect(await shouldShowWhatsNew()).toBe(false);
  });

  it("preserves the earliest upgrade boundary across multiple updates", async () => {
    await recordInstalledVersion({ reason: "update", previousVersion: "5.0.0" } as chrome.runtime.InstalledDetails);
    await recordInstalledVersion({ reason: "update", previousVersion: "5.1.0" } as chrome.runtime.InstalledDetails);
    expect(store["peach_release_notes_from"]).toBe("5.0.0");
    expect((await pendingImportantReleases()).map((release) => release.version)).toEqual(["5.1.3"]);
  });

  it("shouldShowWhatsNew returns false on a fresh install (nothing seen yet)", async () => {
    expect(await shouldShowWhatsNew()).toBe(false);
  });

  it("markWhatsNewSeen stores the current version and suppresses reshowing", async () => {
    store["peach_release_notes_from"] = "5.0.0";
    expect(await shouldShowWhatsNew()).toBe(true);
    await markWhatsNewSeen();
    expect(await shouldShowWhatsNew()).toBe(false);
    expect(store["peach_release_notes_from"]).toBeUndefined();
  });
});