import { beforeEach, describe, expect, it } from "vitest";
import {
  DEFAULT_GATES,
  visibleTourSteps,
  type TourGateContext,
  type TourStep,
} from "@/lib/tours/types";
import { TOURS, getTourForPath } from "@/lib/tours/registry";
import {
  isTourDismissed,
  isToursOptedOut,
  readTourDismissals,
  setToursOptedOut,
  storeTourDismissal,
  writeTourDismissals,
} from "@/lib/tours/dismissals";

const gates = (overrides: Partial<TourGateContext>): TourGateContext => ({
  ...DEFAULT_GATES,
  ...overrides,
});

describe("tour step filtering", () => {
  const steps: TourStep[] = [
    { id: "open", selector: '[data-tour="page-header"]', title: "Open", body: "b" },
    {
      id: "logistics-only",
      selector: '[data-tour="logistics-only"]',
      title: "Logistics",
      body: "b",
      showWhen: (g) => g.hasLogistics,
    },
    {
      id: "intel-only",
      selector: '[data-tour="intel-only"]',
      title: "Intel",
      body: "b",
      showWhen: (g) => g.hasIntelligence,
    },
    {
      id: "stats-flag",
      selector: '[data-tour="stats"]',
      title: "Stats",
      body: "b",
      showWhen: (g) => g.statisticsEnabled,
    },
  ];

  it("a fully privileged visitor sees every step", () => {
    expect(visibleTourSteps(steps, DEFAULT_GATES)).toHaveLength(4);
  });

  it("a visitor without logistics qualification never sees logistics steps", () => {
    const visible = visibleTourSteps(steps, gates({ hasLogistics: false }));
    expect(visible.map((s) => s.id)).toEqual(["open", "intel-only", "stats-flag"]);
  });

  it("a visitor without intelligence qualification never sees intel steps", () => {
    const visible = visibleTourSteps(steps, gates({ hasIntelligence: false }));
    expect(visible.map((s) => s.id)).toEqual(["open", "logistics-only", "stats-flag"]);
  });

  it("feature-flag gates hide steps when the feature is disabled", () => {
    const visible = visibleTourSteps(steps, gates({ statisticsEnabled: false }));
    expect(visible.map((s) => s.id)).toEqual(["open", "logistics-only", "intel-only"]);
  });

  it("a visitor with nothing unlocked sees only ungated steps", () => {
    const visible = visibleTourSteps(
      steps,
      gates({
        hasLogistics: false,
        hasIntelligence: false,
        hasAdminPanel: false,
        statisticsEnabled: false,
        helpdeskEnabled: false,
      }),
    );
    expect(visible.map((s) => s.id)).toEqual(["open"]);
  });
});

describe("tour registry", () => {
  it("covers the major sidebar routes", () => {
    const paths = TOURS.map((tour) => tour.path);
    for (const path of [
      "/",
      "/roster",
      "/map",
      "/operations",
      "/logistics",
      "/logistics/shipments",
      "/logistics/banking",
      "/logistics/market",
      "/wiki",
      "/awards",
      "/locker",
    ]) {
      expect(paths, `missing tour for ${path}`).toContain(path);
    }
  });

  it("has unique tour ids and unique paths", () => {
    expect(new Set(TOURS.map((t) => t.id)).size).toBe(TOURS.length);
    expect(new Set(TOURS.map((t) => t.path)).size).toBe(TOURS.length);
  });

  it("gives every step a unique id and a data-tour anchor", () => {
    for (const tour of TOURS) {
      expect(tour.steps.length, `${tour.id} has steps`).toBeGreaterThan(0);
      expect(new Set(tour.steps.map((s) => s.id)).size, tour.id).toBe(tour.steps.length);
      for (const step of tour.steps) {
        expect(step.selector, `${tour.id}/${step.id}`).toMatch(/^(\[data-tour=|html|body|#)/);
        expect(step.body.length, `${tour.id}/${step.id}`).toBeGreaterThan(0);
        expect(step.body, `${tour.id}/${step.id} copy is dash-clean`).not.toMatch(/[–—]/);
      }
    }
  });

  it("looks up tours by exact path and ignores query strings", () => {
    expect(getTourForPath("/")?.id).toBe("dashboard");
    expect(getTourForPath("/logistics/shipments")?.id).toBe("shipments");
    expect(getTourForPath("/logistics/shipments?foo=bar")).toBeNull();
    expect(getTourForPath("/no/such/page")).toBeNull();
    expect(getTourForPath(null)).toBeNull();
    expect(getTourForPath(undefined)).toBeNull();
  });
});

describe("tour dismissals (per-browser localStorage)", () => {
  const originalSetItem = window.localStorage.setItem.bind(window.localStorage);
  const originalGetItem = window.localStorage.getItem.bind(window.localStorage);

  beforeEach(() => {
    window.localStorage.clear();
  });

  it("stores, reads, and reports dismissals", () => {
    const now = 1_000_000;
    expect(isTourDismissed("dashboard", now)).toBe(false);
    storeTourDismissal("dashboard", now);
    expect(isTourDismissed("dashboard", now)).toBe(true);
    expect(isTourDismissed("other-tour", now)).toBe(false);
    expect(readTourDismissals(now)).toEqual({ dashboard: now });
  });

  it("merges dismissals without losing other tours", () => {
    const now = 5_000;
    window.localStorage.clear();
    writeTourDismissals({ a: now }, now);
    storeTourDismissal("b", now + 1);
    expect(readTourDismissals(now)).toEqual({ a: now, b: now + 1 });
  });

  it("degrades to an empty map when storage reads fail", () => {
    window.localStorage.setItem = () => {
      throw new Error("disabled");
    };
    window.localStorage.getItem = () => {
      throw new Error("disabled");
    };
    expect(readTourDismissals(1)).toEqual({});
    expect(isTourDismissed("dashboard", 1)).toBe(false);
    // Writers swallow the failure instead of crashing the page.
    expect(() => storeTourDismissal("dashboard", 1)).not.toThrow();
  });

  window.localStorage.setItem = originalSetItem;
  window.localStorage.getItem = originalGetItem;
});

describe("tours opt-out (skip all)", () => {
  beforeEach(() => {
    window.localStorage.clear();
  });

  it("defaults to opted-in and toggles per browser", () => {
    expect(isToursOptedOut()).toBe(false);
    setToursOptedOut(true);
    expect(isToursOptedOut()).toBe(true);
    setToursOptedOut(false);
    expect(isToursOptedOut()).toBe(false);
  });

  it("keeps the opt-out independent of per-tour dismissals", () => {
    setToursOptedOut(true);
    storeTourDismissal("dashboard", 1);
    setToursOptedOut(false);
    expect(isTourDismissed("dashboard", 1)).toBe(true);
    expect(isToursOptedOut()).toBe(false);
  });
});