/**
 * @jest-environment node
 */
import { NextRequest, NextResponse } from 'next/server';
import { middleware } from '../middleware';

// Mock NextResponse
jest.mock('next/server', () => ({
  ...jest.requireActual('next/server'),
  NextResponse: {
    next: jest.fn(() => ({ type: 'next' })),
    redirect: jest.fn((url: URL) => ({ type: 'redirect', url: url.toString() })),
  },
}));

describe('Protected Route Middleware', () => {
  const baseUrl = 'http://localhost:3000';

  // Helper to create mock request
  const createRequest = (pathname: string, hasToken = false): NextRequest => {
    const url = new URL(pathname, baseUrl);
    const request = new NextRequest(url);

    // Mock cookies
    if (hasToken) {
      Object.defineProperty(request, 'cookies', {
        value: {
          get: jest.fn((name: string) => {
            if (name === 'accessToken') {
              return { value: 'mock-token-123' };
            }
            return undefined;
          }),
        },
        writable: true,
      });
    } else {
      Object.defineProperty(request, 'cookies', {
        value: {
          get: jest.fn(() => undefined),
        },
        writable: true,
      });
    }

    return request;
  };

  beforeEach(() => {
    jest.clearAllMocks();
  });

  describe('Public Routes (Auth Routes)', () => {
    it('should allow access to /login without token', () => {
      const request = createRequest('/login', false);
      const response = middleware(request);

      expect(response).toEqual({ type: 'next' });
      expect(NextResponse.next).toHaveBeenCalled();
    });

    it('should allow access to /verify-otp without token', () => {
      const request = createRequest('/verify-otp', false);
      const response = middleware(request);

      expect(response).toEqual({ type: 'next' });
      expect(NextResponse.next).toHaveBeenCalled();
    });

    it('should redirect authenticated user from /login to /dashboard', () => {
      const request = createRequest('/login', true);
      const response = middleware(request);

      expect(response).toEqual({
        type: 'redirect',
        url: `${baseUrl}/dashboard`,
      });
      expect(NextResponse.redirect).toHaveBeenCalledWith(
        expect.objectContaining({
          href: `${baseUrl}/dashboard`,
        })
      );
    });

    it('should redirect authenticated user from /verify-otp to /dashboard', () => {
      const request = createRequest('/verify-otp', true);
      const response = middleware(request);

      expect(response).toEqual({
        type: 'redirect',
        url: `${baseUrl}/dashboard`,
      });
    });
  });

  describe('Protected Routes (Main Routes)', () => {
    it('should allow access to /dashboard with token', () => {
      const request = createRequest('/dashboard', true);
      const response = middleware(request);

      expect(response).toEqual({ type: 'next' });
      expect(NextResponse.next).toHaveBeenCalled();
    });

    it('should redirect to /login when accessing /dashboard without token', () => {
      const request = createRequest('/dashboard', false);
      const response = middleware(request);

      expect(response).toEqual({
        type: 'redirect',
        url: expect.stringContaining('/login?redirect=%2Fdashboard'),
      });
      expect(NextResponse.redirect).toHaveBeenCalledWith(
        expect.objectContaining({
          href: expect.stringContaining('/login?redirect=%2Fdashboard'),
        })
      );
    });

    it('should redirect to /login when accessing /profile without token', () => {
      const request = createRequest('/profile', false);
      const response = middleware(request);

      expect(response).toEqual({
        type: 'redirect',
        url: expect.stringContaining('/login?redirect=%2Fprofile'),
      });
    });
  });

  describe('Root Path Handling', () => {
    it('should redirect to /dashboard when accessing / with token', () => {
      const request = createRequest('/', true);
      const response = middleware(request);

      expect(response).toEqual({
        type: 'redirect',
        url: `${baseUrl}/dashboard`,
      });
    });

    it('should redirect to /login when accessing / without token', () => {
      const request = createRequest('/', false);
      const response = middleware(request);

      expect(response).toEqual({
        type: 'redirect',
        url: `${baseUrl}/login`,
      });
    });
  });

  describe('API and Static Routes', () => {
    it('should allow access to API routes without token', () => {
      const request = createRequest('/api/test', false);
      const response = middleware(request);

      expect(response).toEqual({ type: 'next' });
      expect(NextResponse.next).toHaveBeenCalled();
    });

    it('should allow access to _next/static without token', () => {
      const request = createRequest('/_next/static/chunk.js', false);
      const response = middleware(request);

      expect(response).toEqual({ type: 'next' });
    });

    it('should allow access to favicon.ico without token', () => {
      const request = createRequest('/favicon.ico', false);
      const response = middleware(request);

      expect(response).toEqual({ type: 'next' });
    });

    it('should allow access to /images without token', () => {
      const request = createRequest('/images/logo.png', false);
      const response = middleware(request);

      expect(response).toEqual({ type: 'next' });
    });
  });

  describe('Redirect Parameter Preservation', () => {
    it('should preserve original URL in redirect parameter', () => {
      const request = createRequest('/dashboard/settings', false);
      const response = middleware(request);

      expect(response).toEqual({
        type: 'redirect',
        url: expect.stringContaining('/login?redirect=%2Fdashboard%2Fsettings'),
      });
    });

    it('should preserve query parameters in redirect', () => {
      const request = createRequest('/dashboard?tab=profile', false);
      const response = middleware(request);

      expect(response).toEqual({
        type: 'redirect',
        url: expect.stringContaining('/login?redirect='),
      });
    });
  });
});