import { act, renderHook } from "@testing-library/react";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";

const INVITATION_TOKEN_KEY = "wren_invitation_token";

// Mock setSearchParams function
const mockSetSearchParams = vi.fn();

// Default mock searchParams
let mockSearchParamsData: Record<string, string> = {};

// Mock react-router
vi.mock("react-router", () => ({
  useSearchParams: () => [
    {
      get: (key: string) => mockSearchParamsData[key] || null,
      has: (key: string) => key in mockSearchParamsData,
    },
    mockSetSearchParams,
  ],
}));

// Import after mocking
import { useInvitation } from "#/hooks/use-invitation";

describe("useInvitation", () => {
  beforeEach(() => {
    // Clear localStorage before each test
    localStorage.clear();
    // Reset mock data
    mockSearchParamsData = {};
    mockSetSearchParams.mockClear();
  });

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

  describe("initialization", () => {
    it("should initialize with null token when localStorage is empty", () => {
      // Arrange - localStorage is empty (cleared in beforeEach)

      // Act
      const { result } = renderHook(() => useInvitation());

      // Assert
      expect(result.current.invitationToken).toBeNull();
      expect(result.current.hasInvitation).toBe(false);
    });

    it("should initialize with token from localStorage if present", () => {
      // Arrange
      const storedToken = "inv-stored-token-12345";
      localStorage.setItem(INVITATION_TOKEN_KEY, storedToken);

      // Act
      const { result } = renderHook(() => useInvitation());

      // Assert
      expect(result.current.invitationToken).toBe(storedToken);
      expect(result.current.hasInvitation).toBe(true);
    });
  });

  describe("URL token capture", () => {
    it("should capture invitation_token from URL and store in localStorage", () => {
      // Arrange
      const urlToken = "inv-url-token-67890";
      mockSearchParamsData = { invitation_token: urlToken };

      // Act
      renderHook(() => useInvitation());

      // Assert
      expect(localStorage.getItem(INVITATION_TOKEN_KEY)).toBe(urlToken);
      expect(mockSetSearchParams).toHaveBeenCalled();
    });
  });

  describe("completion cleanup", () => {
    it("should clear localStorage when email_mismatch param is present", () => {
      // Arrange
      const storedToken = "inv-token-to-clear";
      localStorage.setItem(INVITATION_TOKEN_KEY, storedToken);
      mockSearchParamsData = { email_mismatch: "true" };

      // Act
      const { result } = renderHook(() => useInvitation());

      // Assert
      expect(localStorage.getItem(INVITATION_TOKEN_KEY)).toBeNull();
      expect(mockSetSearchParams).toHaveBeenCalled();
    });

    it("should clear localStorage when invitation_success param is present", () => {
      // Arrange
      const storedToken = "inv-token-to-clear";
      localStorage.setItem(INVITATION_TOKEN_KEY, storedToken);
      mockSearchParamsData = { invitation_success: "true" };

      // Act
      renderHook(() => useInvitation());

      // Assert
      expect(localStorage.getItem(INVITATION_TOKEN_KEY)).toBeNull();
    });

    it("should clear localStorage when invitation_expired param is present", () => {
      // Arrange
      localStorage.setItem(INVITATION_TOKEN_KEY, "inv-token");
      mockSearchParamsData = { invitation_expired: "true" };

      // Act
      renderHook(() => useInvitation());

      // Assert
      expect(localStorage.getItem(INVITATION_TOKEN_KEY)).toBeNull();
    });
  });

  describe("buildOAuthStateData", () => {
    it("should include invitation_token in OAuth state when token is present", () => {
      // Arrange
      const token = "inv-oauth-token-12345";
      localStorage.setItem(INVITATION_TOKEN_KEY, token);

      const { result } = renderHook(() => useInvitation());
      const baseState = { redirect_url: "/dashboard" };

      // Act
      const stateData = result.current.buildOAuthStateData(baseState);

      // Assert
      expect(stateData.invitation_token).toBe(token);
      expect(stateData.redirect_url).toBe("/dashboard");
    });

    it("should not include invitation_token when no token is present", () => {
      // Arrange - no token in localStorage

      const { result } = renderHook(() => useInvitation());
      const baseState = { redirect_url: "/dashboard" };

      // Act
      const stateData = result.current.buildOAuthStateData(baseState);

      // Assert
      expect(stateData.invitation_token).toBeUndefined();
      expect(stateData.redirect_url).toBe("/dashboard");
    });
  });

  describe("clearInvitation", () => {
    it("should remove token from localStorage when called", () => {
      // Arrange
      localStorage.setItem(INVITATION_TOKEN_KEY, "inv-token-to-clear");
      const { result } = renderHook(() => useInvitation());

      // Act
      act(() => {
        result.current.clearInvitation();
      });

      // Assert
      expect(localStorage.getItem(INVITATION_TOKEN_KEY)).toBeNull();
      expect(result.current.invitationToken).toBeNull();
      expect(result.current.hasInvitation).toBe(false);
    });
  });
});