/**
 * Property-based tests for UserCard component
 * **Feature: miniapp-frontend, Property 3: User Card Photo Display**
 * **Feature: miniapp-frontend, Property 4: User Card Badge Display**
 * **Validates: Requirements 2.4, 2.5, 2.6, 2.7, 2.8, 5.2**
 */

import { describe, it, expect } from 'vitest'
import * as fc from 'fast-check'
import { getPhotoDisplayState, getBadgeDisplayState } from '../../components/UserCard/userCardUtils.js'

describe('UserCard Property Tests', () => {
  /**
   * Property 3: User Card Photo Display
   * *For any* user data where `isPhotoPublic` is true, the rendered user card 
   * SHALL display the actual photo; where `isPhotoPublic` is false, the card 
   * SHALL display a blurred placeholder.
   * **Validates: Requirements 2.4, 2.5, 5.2**
   */
  describe('Property 3: User Card Photo Display', () => {
    // Arbitrary for photo URL (non-empty string representing a valid URL)
    const photoUrlArb = fc.webUrl()
    
    // Arbitrary for empty/null photo
    const emptyPhotoArb = fc.constantFrom('', null, undefined)

    it('should show actual photo when isPhotoPublic is true and photo exists', () => {
      fc.assert(
        fc.property(
          photoUrlArb,
          (photoUrl) => {
            const result = getPhotoDisplayState(true, photoUrl)
            
            // When photo is public and exists, should show the photo
            expect(result.showPhoto).toBe(true)
            expect(result.showPlaceholder).toBe(false)
            expect(result.isBlurred).toBe(false)
            
            return true
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should show blurred placeholder when isPhotoPublic is false', () => {
      fc.assert(
        fc.property(
          fc.oneof(photoUrlArb, emptyPhotoArb),
          (photoUrl) => {
            const result = getPhotoDisplayState(false, photoUrl)
            
            // When photo is private, should show blurred placeholder
            expect(result.showPlaceholder).toBe(true)
            expect(result.isBlurred).toBe(true)
            expect(result.showPhoto).toBe(false)
            
            return true
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should show placeholder when photo URL is empty even if public', () => {
      fc.assert(
        fc.property(
          emptyPhotoArb,
          (photoUrl) => {
            const result = getPhotoDisplayState(true, photoUrl)
            
            // When photo URL is empty, should show placeholder (not blurred)
            expect(result.showPlaceholder).toBe(true)
            expect(result.showPhoto).toBe(false)
            // Not blurred because it's public, just missing
            expect(result.isBlurred).toBe(false)
            
            return true
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should correctly determine photo display for any combination of isPhotoPublic and photo', () => {
      fc.assert(
        fc.property(
          fc.boolean(),
          fc.oneof(photoUrlArb, emptyPhotoArb),
          (isPhotoPublic, photoUrl) => {
            const result = getPhotoDisplayState(isPhotoPublic, photoUrl)
            const hasPhoto = !!photoUrl
            
            // Core property: showPhoto is true IFF isPhotoPublic AND hasPhoto
            expect(result.showPhoto).toBe(isPhotoPublic && hasPhoto)
            
            // showPlaceholder is the inverse of showPhoto
            expect(result.showPlaceholder).toBe(!result.showPhoto)
            
            // isBlurred is true IFF isPhotoPublic is false
            expect(result.isBlurred).toBe(!isPhotoPublic)
            
            return true
          }
        ),
        { numRuns: 100 }
      )
    })
  })

  /**
   * Property 4: User Card Badge Display
   * *For any* user data, the user card SHALL display "会员" badge if and only if 
   * `isMember` is true, "已实名" badge if and only if `isRealName` is true, and 
   * "今天看过" indicator if and only if `viewedToday` is true.
   * **Validates: Requirements 2.6, 2.7, 2.8**
   */
  describe('Property 4: User Card Badge Display', () => {
    // Arbitrary for user badge data
    const userBadgeDataArb = fc.record({
      isMember: fc.boolean(),
      isRealName: fc.boolean(),
      viewedToday: fc.boolean()
    })

    it('should show member badge if and only if isMember is true', () => {
      fc.assert(
        fc.property(
          userBadgeDataArb,
          (userData) => {
            const result = getBadgeDisplayState(userData)
            
            // Member badge should be shown IFF isMember is true
            expect(result.showMemberBadge).toBe(userData.isMember)
            
            return true
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should show realname badge if and only if isRealName is true', () => {
      fc.assert(
        fc.property(
          userBadgeDataArb,
          (userData) => {
            const result = getBadgeDisplayState(userData)
            
            // RealName badge should be shown IFF isRealName is true
            expect(result.showRealNameBadge).toBe(userData.isRealName)
            
            return true
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should show viewedToday indicator if and only if viewedToday is true', () => {
      fc.assert(
        fc.property(
          userBadgeDataArb,
          (userData) => {
            const result = getBadgeDisplayState(userData)
            
            // ViewedToday indicator should be shown IFF viewedToday is true
            expect(result.showViewedTodayIndicator).toBe(userData.viewedToday)
            
            return true
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should correctly determine all badge states for any combination', () => {
      fc.assert(
        fc.property(
          userBadgeDataArb,
          (userData) => {
            const result = getBadgeDisplayState(userData)
            
            // All three badge states should match their corresponding flags
            expect(result.showMemberBadge).toBe(userData.isMember)
            expect(result.showRealNameBadge).toBe(userData.isRealName)
            expect(result.showViewedTodayIndicator).toBe(userData.viewedToday)
            
            return true
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should handle missing or undefined properties gracefully', () => {
      fc.assert(
        fc.property(
          fc.oneof(
            fc.constant(null),
            fc.constant(undefined),
            fc.constant({}),
            fc.record({
              isMember: fc.option(fc.boolean(), { nil: undefined }),
              isRealName: fc.option(fc.boolean(), { nil: undefined }),
              viewedToday: fc.option(fc.boolean(), { nil: undefined })
            })
          ),
          (userData) => {
            const result = getBadgeDisplayState(userData)
            
            // Should default to false for missing properties
            const expectedMember = userData?.isMember === true
            const expectedRealName = userData?.isRealName === true
            const expectedViewedToday = userData?.viewedToday === true
            
            expect(result.showMemberBadge).toBe(expectedMember)
            expect(result.showRealNameBadge).toBe(expectedRealName)
            expect(result.showViewedTodayIndicator).toBe(expectedViewedToday)
            
            return true
          }
        ),
        { numRuns: 100 }
      )
    })
  })
})