/**
 * Router Guards Tests
 * Verifies route protection with auth and feature flags
 */

import { describe, it, expect, beforeEach, vi } from 'vitest';
import { setupAuthGuards } from '../../../src/router/guards.js';

// Mock composables
vi.mock('../../../src/composables/useAuth.js', () => ({
  useAuth: vi.fn()
}));

vi.mock('../../../src/composables/useFeatureFlags.js', () => ({
  useFeatureFlags: vi.fn()
}));

import { useAuth } from '../../../src/composables/useAuth.js';
import { useFeatureFlags } from '../../../src/composables/useFeatureFlags.js';

describe('Router Guards', () => {
  let router;
  let beforeEachGuard;

  beforeEach(() => {
    // Create mock router
    router = {
      beforeEach: vi.fn(guard => {
        beforeEachGuard = guard;
      }),
      afterEach: vi.fn()
    };

    // Default mock implementations
    useAuth.mockReturnValue({
      isAuthenticated: { value: false },
      initializeAuth: vi.fn()
    });

    useFeatureFlags.mockReturnValue({
      isEnabled: { value: vi.fn(() => true) }
    });
  });

  it('registers beforeEach and afterEach guards', () => {
    setupAuthGuards(router);

    expect(router.beforeEach).toHaveBeenCalled();
    expect(router.afterEach).toHaveBeenCalled();
  });

  it('allows navigation to public routes', async () => {
    setupAuthGuards(router);

    const to = { path: '/', meta: {} };
    const from = { path: '/previous' };
    const next = vi.fn();

    await beforeEachGuard(to, from, next);

    expect(next).toHaveBeenCalledWith();
  });

  it('blocks access to feature-flagged routes when flag is disabled', async () => {
    useFeatureFlags.mockReturnValue({
      isEnabled: { value: vi.fn(() => false) }
    });

    setupAuthGuards(router);

    const to = {
      path: '/experimental',
      meta: { featureFlag: 'experimental-feature' }
    };
    const from = { path: '/' };
    const next = vi.fn();

    await beforeEachGuard(to, from, next);

    expect(next).toHaveBeenCalledWith({ name: 'Home', replace: true });
  });

  it('allows access to feature-flagged routes when flag is enabled', async () => {
    useFeatureFlags.mockReturnValue({
      isEnabled: { value: vi.fn(() => true) }
    });

    setupAuthGuards(router);

    const to = {
      path: '/experimental',
      meta: { featureFlag: 'experimental-feature' }
    };
    const from = { path: '/' };
    const next = vi.fn();

    await beforeEachGuard(to, from, next);

    expect(next).toHaveBeenCalledWith();
  });

  it('redirects to login for admin routes when not authenticated', async () => {
    useAuth.mockReturnValue({
      isAuthenticated: { value: false },
      initializeAuth: vi.fn()
    });

    setupAuthGuards(router);

    const to = {
      path: '/admin',
      fullPath: '/admin?tab=settings',
      meta: { requiresAdmin: true }
    };
    const from = { path: '/' };
    const next = vi.fn();

    await beforeEachGuard(to, from, next);

    expect(next).toHaveBeenCalledWith({
      name: 'admin-login',
      query: { redirect: '/admin?tab=settings' }
    });
  });

  it('allows navigation to admin routes when authenticated', async () => {
    useAuth.mockReturnValue({
      isAuthenticated: { value: true },
      initializeAuth: vi.fn()
    });

    setupAuthGuards(router);

    const to = {
      path: '/admin',
      meta: { requiresAdmin: true }
    };
    const from = { path: '/' };
    const next = vi.fn();

    await beforeEachGuard(to, from, next);

    expect(next).toHaveBeenCalledWith();
  });

  it('initializes auth before checking routes', async () => {
    const initializeAuth = vi.fn();
    useAuth.mockReturnValue({
      isAuthenticated: { value: false },
      initializeAuth
    });

    setupAuthGuards(router);

    const to = { path: '/', meta: {} };
    const from = { path: '/' };
    const next = vi.fn();

    await beforeEachGuard(to, from, next);

    expect(initializeAuth).toHaveBeenCalled();
  });

  it('handles both auth and feature flag requirements', async () => {
    useAuth.mockReturnValue({
      isAuthenticated: { value: true },
      initializeAuth: vi.fn()
    });

    useFeatureFlags.mockReturnValue({
      isEnabled: { value: vi.fn(() => true) }
    });

    setupAuthGuards(router);

    const to = {
      path: '/admin-feature',
      meta: {
        requiresAdmin: true,
        featureFlag: 'admin-panel'
      }
    };
    const from = { path: '/' };
    const next = vi.fn();

    await beforeEachGuard(to, from, next);

    // Should pass both checks
    expect(next).toHaveBeenCalledWith();
  });
});