import { describe, it, expect } from 'vitest'

/**
 * Middleware Route Protection Tests
 * 
 * These tests verify the route protection logic defined in middleware.ts
 * Testing the actual middleware requires mocking NextAuth which is complex,
 * so we test the route matching logic here.
 */

describe('Middleware Route Protection Logic', () => {
  // Helper to check if a path is a protected route
  const isProtectedRoute = (pathname: string): boolean => {
    return (
      pathname === "/" ||
      pathname.startsWith("/list") ||
      pathname.startsWith("/profile") ||
      pathname.startsWith("/invitations")
    )
  }

  // Helper to check if a path is an auth page
  const isAuthPage = (pathname: string): boolean => {
    return pathname.startsWith("/auth")
  }

  describe('Protected Routes', () => {
    it('should identify root path as protected', () => {
      expect(isProtectedRoute("/")).toBe(true)
    })

    it('should identify list routes as protected', () => {
      expect(isProtectedRoute("/list")).toBe(true)
      expect(isProtectedRoute("/list/123")).toBe(true)
      expect(isProtectedRoute("/list/123/item/456")).toBe(true)
    })

    it('should identify profile routes as protected', () => {
      expect(isProtectedRoute("/profile")).toBe(true)
      expect(isProtectedRoute("/profile/settings")).toBe(true)
    })

    it('should identify invitations routes as protected', () => {
      expect(isProtectedRoute("/invitations")).toBe(true)
    })
  })

  describe('Auth Pages', () => {
    it('should identify login page as auth page', () => {
      expect(isAuthPage("/auth/login")).toBe(true)
    })

    it('should identify register page as auth page', () => {
      expect(isAuthPage("/auth/register")).toBe(true)
    })

    it('should identify error page as auth page', () => {
      expect(isAuthPage("/auth/error")).toBe(true)
    })

    it('should not identify non-auth pages as auth pages', () => {
      expect(isAuthPage("/")).toBe(false)
      expect(isAuthPage("/list/123")).toBe(false)
    })
  })

  describe('Route Classification', () => {
    it('should correctly classify various routes', () => {
      // Protected routes
      expect(isProtectedRoute("/")).toBe(true)
      expect(isProtectedRoute("/list/abc123")).toBe(true)
      expect(isProtectedRoute("/profile")).toBe(true)
      
      // Auth pages (not protected, but special handling)
      expect(isAuthPage("/auth/login")).toBe(true)
      expect(isAuthPage("/auth/register")).toBe(true)
      
      // Public routes (not protected)
      expect(isProtectedRoute("/api/auth/signin")).toBe(false)
      expect(isProtectedRoute("/offline")).toBe(false)
    })
  })

  describe('Middleware Matcher Pattern', () => {
    // Test that the matcher pattern would correctly exclude certain paths
    const shouldBeExcludedByMatcher = (pathname: string): boolean => {
      // Based on the matcher config in middleware.ts
      return (
        pathname.startsWith("/api") ||
        pathname.startsWith("/_next/static") ||
        pathname.startsWith("/_next/image") ||
        pathname === "/favicon.ico" ||
        /\.(svg|png|jpg|jpeg|gif|webp|ico|json|js)$/.test(pathname)
      )
    }

    it('should exclude API routes from middleware', () => {
      expect(shouldBeExcludedByMatcher("/api/lists")).toBe(true)
      expect(shouldBeExcludedByMatcher("/api/auth/signin")).toBe(true)
    })

    it('should exclude static files from middleware', () => {
      expect(shouldBeExcludedByMatcher("/_next/static/chunks/main.js")).toBe(true)
      expect(shouldBeExcludedByMatcher("/_next/image/logo.png")).toBe(true)
    })

    it('should exclude public assets from middleware', () => {
      expect(shouldBeExcludedByMatcher("/favicon.ico")).toBe(true)
      expect(shouldBeExcludedByMatcher("/icon-192.png")).toBe(true)
      expect(shouldBeExcludedByMatcher("/manifest.json")).toBe(true)
      expect(shouldBeExcludedByMatcher("/sw.js")).toBe(true)
    })

    it('should not exclude regular pages from middleware', () => {
      expect(shouldBeExcludedByMatcher("/")).toBe(false)
      expect(shouldBeExcludedByMatcher("/list/123")).toBe(false)
      expect(shouldBeExcludedByMatcher("/auth/login")).toBe(false)
      expect(shouldBeExcludedByMatcher("/profile")).toBe(false)
    })
  })
})