/**
 * 签到配置管理模块属性测试
 * 
 * 使用 fast-check 进行属性测试，验证签到配置管理模块的正确性属性
 * 
 * Feature: welfare-task-frontend
 */

import { describe, it, expect } from 'vitest'
import * as fc from 'fast-check'
import { SignType, SignTypeLabels } from './signconfig'
import { RewardType, RewardTypeLabels } from './reward'

// ==================== 辅助函数 ====================

/**
 * 构建搜索参数对象，过滤掉空值
 * 用于验证搜索参数正确传递
 */
function buildSearchParams<T extends Record<string, any>>(params: T): Record<string, any> {
  const result: Record<string, any> = {}
  for (const [key, value] of Object.entries(params)) {
    if (value !== undefined && value !== null && (typeof value !== 'string' || value !== '')) {
      result[key] = value
    }
  }
  return result
}

/**
 * 检查值是否为空（undefined, null, 或空字符串）
 */
function isEmptyValue(value: unknown): boolean {
  return value === undefined || value === null || (typeof value === 'string' && value === '')
}

/**
 * 验证分页参数是否有效
 */
function isValidPagination(page: number, pageSize: number): boolean {
  return page >= 1 && pageSize > 0 && Number.isInteger(page) && Number.isInteger(pageSize)
}

/**
 * 验证签到类型是否有效
 */
function _isValidSignType(type: number): boolean {
  return type === SignType.Daily || type === SignType.Cumulative
}
// Export for potential future use
export { _isValidSignType as isValidSignType }

/**
 * 验证奖励类型是否有效
 */
function isValidRewardType(type: number): boolean {
  return type === RewardType.Diamond || 
         type === RewardType.UUCoin || 
         type === RewardType.DaDaCoin || 
         type === RewardType.Coupon
}

/**
 * 验证签到配置表单必填字段
 */
function isValidSignConfigForm(title: string, day: number): boolean {
  return (
    title.trim().length > 0 &&
    typeof day === 'number' && day > 0 && Number.isInteger(day)
  )
}

/**
 * 验证奖励配置是否有效
 */
function isValidRewardConfig(rewardType: number, rewardValue: number, rewardExtend?: number): boolean {
  if (!isValidRewardType(rewardType)) {
    return false
  }
  
  if (rewardType === RewardType.Coupon) {
    // 优惠券类型需要有效的优惠券ID
    return typeof rewardExtend === 'number' && rewardExtend > 0
  } else {
    // 非优惠券类型需要有效的奖励数值
    return typeof rewardValue === 'number' && rewardValue > 0
  }
}

/**
 * 根据签到类型获取数据，验证数据隔离
 */
function filterBySignType(items: Array<{ type: number }>, signType: number): Array<{ type: number }> {
  return items.filter(item => item.type === signType)
}

/**
 * 验证API响应格式是否符合规范
 */
function _isValidApiResponse(response: any): boolean {
  return (
    typeof response === 'object' &&
    response !== null &&
    typeof response.code === 'number' &&
    typeof response.message === 'string'
  )
}
// Export for potential future use
export { _isValidApiResponse as isValidApiResponse }

// ==================== 生成器 ====================

/** 生成有效的签到类型 */
const validSignTypeArb = fc.constantFrom(SignType.Daily, SignType.Cumulative)

/** 生成有效的奖励类型 */
const validRewardTypeArb = fc.constantFrom(
  RewardType.Diamond,
  RewardType.UUCoin,
  RewardType.DaDaCoin,
  RewardType.Coupon
)

/** 生成有效的页码 */
const validPageArb = fc.integer({ min: 1, max: 1000 })

/** 生成有效的每页数量 */
const validPageSizeArb = fc.integer({ min: 1, max: 100 })

/** 生成可选的关键词 */
const optionalKeywordArb = fc.option(
  fc.string({ minLength: 1, maxLength: 50 }),
  { nil: undefined }
)

/** 生成有效的标题 */
const validTitleArb = fc.string({ minLength: 1, maxLength: 50 }).filter(s => s.trim().length > 0)

/** 生成有效的天数 */
const validDayArb = fc.integer({ min: 1, max: 365 })

/** 生成有效的奖励数值 */
const validRewardValueArb = fc.integer({ min: 1, max: 99999 })

/** 生成有效的优惠券ID */
const validCouponIdArb = fc.integer({ min: 1, max: 99999 })

/** 生成有效的排序值 */
const validSortArb = fc.integer({ min: 0, max: 9999 })

/** 生成签到配置项 */
const signConfigItemArb = fc.record({
  id: fc.integer({ min: 1, max: 99999 }),
  type: validSignTypeArb,
  day: validDayArb,
  title: validTitleArb,
  status: fc.constantFrom(0, 1),
  sort: validSortArb
})

/** 生成奖励配置项 - exported for potential future use */
export const rewardConfigArb = fc.record({
  rewardType: validRewardTypeArb,
  rewardValue: validRewardValueArb,
  rewardExtend: fc.option(validCouponIdArb, { nil: undefined })
})

// ==================== 属性测试 ====================

describe('签到配置管理模块属性测试', () => {
  /**
   * Property 6: 签到类型切换数据隔离
   * 
   * 对于任意签到类型切换，返回的配置应该只包含所选类型的数据
   * 
   * Validates: Requirements 3.2
   * Feature: welfare-task-frontend, Property 6: 签到类型切换数据隔离
   */
  describe('Property 6: 签到类型切换数据隔离', () => {
    it('对于任意签到类型，filterBySignType应该只返回匹配类型的配置', () => {
      fc.assert(
        fc.property(
          fc.array(signConfigItemArb, { minLength: 0, maxLength: 20 }),
          validSignTypeArb,
          (items, signType) => {
            const filtered = filterBySignType(items, signType)
            
            // 所有返回的项目都应该是所选类型
            const allMatchType = filtered.every(item => item.type === signType)
            
            // 返回的数量应该等于原数组中该类型的数量
            const expectedCount = items.filter(item => item.type === signType).length
            const actualCount = filtered.length
            
            return allMatchType && actualCount === expectedCount
          }
        ),
        { numRuns: 100 }
      )
    })

    it('切换到每日签到时，不应该包含累计签到的数据', () => {
      fc.assert(
        fc.property(
          fc.array(signConfigItemArb, { minLength: 1, maxLength: 20 }),
          (items) => {
            const filtered = filterBySignType(items, SignType.Daily)
            return filtered.every(item => item.type !== SignType.Cumulative)
          }
        ),
        { numRuns: 100 }
      )
    })

    it('切换到累计签到时，不应该包含每日签到的数据', () => {
      fc.assert(
        fc.property(
          fc.array(signConfigItemArb, { minLength: 1, maxLength: 20 }),
          (items) => {
            const filtered = filterBySignType(items, SignType.Cumulative)
            return filtered.every(item => item.type !== SignType.Daily)
          }
        ),
        { numRuns: 100 }
      )
    })
  })

  /**
   * Property: 奖励配置验证
   * 
   * 对于任意奖励配置，验证函数应该正确判断配置是否有效
   * 
   * Validates: Requirements 4.3
   * Feature: welfare-task-frontend, Property: 奖励配置验证
   */
  describe('奖励配置验证', () => {
    it('对于优惠券类型，必须有有效的优惠券ID', () => {
      fc.assert(
        fc.property(
          validRewardValueArb,
          validCouponIdArb,
          (rewardValue, couponId) => {
            // 有优惠券ID时应该有效
            const validWithCoupon = isValidRewardConfig(RewardType.Coupon, rewardValue, couponId)
            // 没有优惠券ID时应该无效
            const invalidWithoutCoupon = !isValidRewardConfig(RewardType.Coupon, rewardValue, undefined)
            
            return validWithCoupon && invalidWithoutCoupon
          }
        ),
        { numRuns: 100 }
      )
    })

    it('对于非优惠券类型，必须有有效的奖励数值', () => {
      fc.assert(
        fc.property(
          fc.constantFrom(RewardType.Diamond, RewardType.UUCoin, RewardType.DaDaCoin),
          validRewardValueArb,
          (rewardType, rewardValue) => {
            // 有有效数值时应该有效
            const validWithValue = isValidRewardConfig(rewardType, rewardValue)
            // 数值为0或负数时应该无效
            const invalidWithZero = !isValidRewardConfig(rewardType, 0)
            const invalidWithNegative = !isValidRewardConfig(rewardType, -1)
            
            return validWithValue && invalidWithZero && invalidWithNegative
          }
        ),
        { numRuns: 100 }
      )
    })

    it('对于任意有效的奖励类型，isValidRewardType应该返回true', () => {
      fc.assert(
        fc.property(
          validRewardTypeArb,
          (rewardType) => {
            return isValidRewardType(rewardType)
          }
        ),
        { numRuns: 100 }
      )
    })

    it('对于无效的奖励类型，isValidRewardType应该返回false', () => {
      fc.assert(
        fc.property(
          fc.integer({ min: 5, max: 100 }),
          (invalidType) => {
            return !isValidRewardType(invalidType)
          }
        ),
        { numRuns: 100 }
      )
    })
  })

  /**
   * Property: 分页参数验证
   * 
   * 对于任意分页参数，验证函数应该正确判断参数是否有效
   * 
   * Validates: Requirements 3.3
   * Feature: welfare-task-frontend, Property 10: 分页参数正确传递
   */
  describe('分页参数验证', () => {
    it('对于任意有效的分页参数，isValidPagination应该返回true', () => {
      fc.assert(
        fc.property(
          validPageArb,
          validPageSizeArb,
          (page, pageSize) => {
            return isValidPagination(page, pageSize)
          }
        ),
        { numRuns: 100 }
      )
    })

    it('对于页码小于1的参数，isValidPagination应该返回false', () => {
      fc.assert(
        fc.property(
          fc.integer({ min: -100, max: 0 }),
          validPageSizeArb,
          (page, pageSize) => {
            return !isValidPagination(page, pageSize)
          }
        ),
        { numRuns: 100 }
      )
    })

    it('对于每页数量小于等于0的参数，isValidPagination应该返回false', () => {
      fc.assert(
        fc.property(
          validPageArb,
          fc.integer({ min: -100, max: 0 }),
          (page, pageSize) => {
            return !isValidPagination(page, pageSize)
          }
        ),
        { numRuns: 100 }
      )
    })
  })

  /**
   * Property: 签到配置表单验证
   * 
   * 对于任意签到配置表单数据，验证函数应该正确判断数据是否有效
   * 
   * Validates: Requirements 4.1, 4.2
   * Feature: welfare-task-frontend, Property: 签到配置表单验证
   */
  describe('签到配置表单验证', () => {
    it('对于任意有效的表单数据，isValidSignConfigForm应该返回true', () => {
      fc.assert(
        fc.property(
          validTitleArb,
          validDayArb,
          (title, day) => {
            return isValidSignConfigForm(title, day)
          }
        ),
        { numRuns: 100 }
      )
    })

    it('对于空标题，isValidSignConfigForm应该返回false', () => {
      fc.assert(
        fc.property(
          fc.constantFrom('', '   ', '\t', '\n'),
          validDayArb,
          (title, day) => {
            return !isValidSignConfigForm(title, day)
          }
        ),
        { numRuns: 100 }
      )
    })

    it('对于天数小于等于0，isValidSignConfigForm应该返回false', () => {
      fc.assert(
        fc.property(
          validTitleArb,
          fc.integer({ min: -100, max: 0 }),
          (title, day) => {
            return !isValidSignConfigForm(title, day)
          }
        ),
        { numRuns: 100 }
      )
    })
  })

  /**
   * Property: 搜索参数构建
   * 
   * 对于任意搜索参数，buildSearchParams应该正确过滤空值
   * 
   * Validates: Requirements 3.1
   * Feature: welfare-task-frontend, Property: 搜索参数构建
   */
  describe('搜索参数构建', () => {
    it('对于任意搜索参数，buildSearchParams应该过滤掉空值', () => {
      fc.assert(
        fc.property(
          validPageArb,
          validPageSizeArb,
          validSignTypeArb,
          optionalKeywordArb,
          (page, pageSize, type, keyword) => {
            const params = { page, pageSize, type, keyword }
            const result = buildSearchParams(params)
            
            // 结果中不应该包含空值
            const hasNoEmptyValues = Object.values(result).every(v => !isEmptyValue(v))
            
            // 非空值应该被保留
            const preservesNonEmpty = result.page === page && 
                                      result.pageSize === pageSize && 
                                      result.type === type
            
            // 如果keyword有值，应该被保留
            const keywordPreserved = keyword === undefined || result.keyword === keyword
            
            return hasNoEmptyValues && preservesNonEmpty && keywordPreserved
          }
        ),
        { numRuns: 100 }
      )
    })
  })

  /**
   * Property: 签到类型标签映射
   * 
   * 对于任意有效的签到类型，应该有对应的标签
   * 
   * Validates: Requirements 3.1
   * Feature: welfare-task-frontend, Property: 签到类型标签映射
   */
  describe('签到类型标签映射', () => {
    it('对于任意有效的签到类型，SignTypeLabels应该有对应的标签', () => {
      fc.assert(
        fc.property(
          validSignTypeArb,
          (signType) => {
            const label = SignTypeLabels[signType]
            return typeof label === 'string' && label.length > 0
          }
        ),
        { numRuns: 100 }
      )
    })

    it('每日签到类型应该有正确的标签', () => {
      expect(SignTypeLabels[SignType.Daily]).toBe('每日签到')
    })

    it('累计签到类型应该有正确的标签', () => {
      expect(SignTypeLabels[SignType.Cumulative]).toBe('累计签到')
    })
  })

  /**
   * Property: 奖励类型标签映射
   * 
   * 对于任意有效的奖励类型，应该有对应的标签
   * 
   * Validates: Requirements 4.3
   * Feature: welfare-task-frontend, Property: 奖励类型标签映射
   */
  describe('奖励类型标签映射', () => {
    it('对于任意有效的奖励类型，RewardTypeLabels应该有对应的标签', () => {
      fc.assert(
        fc.property(
          validRewardTypeArb,
          (rewardType) => {
            const label = RewardTypeLabels[rewardType]
            return typeof label === 'string' && label.length > 0
          }
        ),
        { numRuns: 100 }
      )
    })
  })
})
