import { describe, it, expect, beforeEach, vi } from 'vitest';
import { setActivePinia, createPinia } from 'pinia';

// Mock apiError to prevent side effects (imports router, pinia, toast)
vi.mock('@/module/apiError.js', () => ({
  default: vi.fn(),
}));

import axios from 'axios';
import useLoginStore from '@/stores/login.ts';

// Mock axios methods
vi.spyOn(axios, 'post').mockImplementation(vi.fn());
vi.spyOn(axios, 'get').mockImplementation(vi.fn());

describe('loginStore', () => {
  let store;

  beforeEach(() => {
    setActivePinia(createPinia());
    store = useLoginStore();
    store.$router = { push: vi.fn() };
    vi.clearAllMocks();
    // Clear cookies
    document.cookie.split(';').forEach((c) => {
      const name = c.split('=')[0].trim();
      if (name) {
        document.cookie = name + '=; Max-Age=-99999999; path=/';
      }
    });
  });

  it('has correct default state', () => {
    expect(store.auth.grant_type).toBe('password');
    expect(store.auth.username).toBe('');
    expect(store.isLoggedIn).toBe(false);
    expect(store.isInvalid).toBe(false);
  });

  describe('signIn', () => {
    it('stores token and navigates on success', async () => {
      axios.post.mockResolvedValue({
        data: {
          access_token: 'test-access-token',
          refresh_token: 'test-refresh-token',
        },
      });

      await store.signIn();

      expect(axios.post).toHaveBeenCalledWith(
        '/api/oauth/token',
        store.auth,
        expect.objectContaining({
          headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
        }),
      );
      expect(store.isLoggedIn).toBe(true);
      expect(document.cookie).toContain('luciaToken=test-access-token');
      expect(store.$router.push).toHaveBeenCalledWith('/files');
    });

    it('redirects to remembered URL when set', async () => {
      axios.post.mockResolvedValue({
        data: {
          access_token: 'token',
          refresh_token: 'refresh',
        },
      });
      // btoa('/dashboard') = 'L2Rhc2hib2FyZA=='
      store.rememberedReturnToUrl = btoa('/dashboard');

      // Mock window.location.href setter
      const originalLocation = window.location;
      delete window.location;
      window.location = { href: '' };

      await store.signIn();

      expect(window.location.href).toBe('/dashboard');
      window.location = originalLocation;
    });

    it('sets isInvalid on error', async () => {
      axios.post.mockRejectedValue(new Error('401'));

      await store.signIn();

      expect(store.isInvalid).toBe(true);
    });
  });

  describe('logOut', () => {
    it('clears auth state and navigates to login', () => {
      store.isLoggedIn = true;
      store.logOut();

      expect(store.isLoggedIn).toBe(false);
      expect(store.$router.push).toHaveBeenCalledWith('/login');
    });
  });

  describe('getUserData', () => {
    it('stores user data on success', async () => {
      axios.get.mockResolvedValue({
        data: { username: 'testuser', name: 'Test User' },
      });

      await store.getUserData();

      expect(axios.get).toHaveBeenCalledWith('/api/my-account');
      expect(store.userData).toEqual({
        username: 'testuser',
        name: 'Test User',
      });
    });
  });

  describe('checkLogin', () => {
    it('does not redirect on success', async () => {
      axios.get.mockResolvedValue({ data: {} });

      await store.checkLogin();

      expect(store.$router.push).not.toHaveBeenCalled();
    });

    it('redirects to login on error', async () => {
      axios.get.mockRejectedValue(new Error('401'));

      await store.checkLogin();

      expect(store.$router.push).toHaveBeenCalledWith('/login');
    });
  });

  it('setRememberedReturnToUrl stores URL', () => {
    store.setRememberedReturnToUrl('abc');
    expect(store.rememberedReturnToUrl).toBe('abc');
  });

  it('setIsLoggedIn sets boolean', () => {
    store.setIsLoggedIn(true);
    expect(store.isLoggedIn).toBe(true);
  });

  describe('expired', () => {
    it('is approximately 6 months in the future', () => {
      const now = new Date();
      const sixMonthsLater = new Date(now);
      sixMonthsLater.setMonth(sixMonthsLater.getMonth() + 6);

      const expiredDate = new Date(store.expired);
      // Allow 1 day tolerance
      const diffMs = Math.abs(expiredDate.getTime() - sixMonthsLater.getTime());
      expect(diffMs).toBeLessThan(24 * 60 * 60 * 1000);
    });
  });
});