/**
 * 管理员系统属性测试基础框架
 * 
 * 功能描述：
 * - 提供属性测试的基础工具和断言
 * - 实现通用的测试数据生成器
 * - 支持随机化测试和边界条件验证
 * 
 * 属性测试原理：
 * - 验证系统在各种输入条件下的通用正确性属性
 * - 通过大量随机测试用例发现边界问题
 * - 确保系统行为的一致性和可靠性
 * 
 * 最近修改：
 * - 2026-01-08: 注释规范优化 - 修正@author字段，更新版本号和修改记录 (修改者: moyin)
 * - 2026-01-08: 注释规范优化 - 为接口添加注释，完善文档说明 (修改者: moyin)
 * - 2026-01-08: 功能新增 - 创建属性测试基础框架 (修改者: assistant)
 * 
 * @author moyin
 * @version 1.0.2
 * @since 2026-01-08
 * @lastModified 2026-01-08
 */

import { Logger } from '@nestjs/common';
import { UserStatus } from '../user_mgmt/user_status.enum';

/**
 * 属性测试配置接口
 * 
 * 功能描述：
 * 定义属性测试的运行配置参数
 * 
 * 使用场景：
 * - 配置属性测试的迭代次数和超时时间
 * - 设置随机种子以确保测试的可重现性
 */
export interface PropertyTestConfig {
  iterations: number;
  timeout: number;
  seed?: number;
}

export const DEFAULT_PROPERTY_CONFIG: PropertyTestConfig = {
  iterations: 100,
  timeout: 30000,
  seed: 12345
};

/**
 * 属性测试生成器
 */
export class PropertyTestGenerators {
  /**
   * 生成随机用户数据
   */
  static generateUser(seed?: number) {
    const random = seed ? Math.sin(seed) * 10000 - Math.floor(Math.sin(seed) * 10000) : Math.random();
    const id = Math.floor(random * 1000000);
    return {
      username: `testuser${id}`,
      nickname: `Test User ${id}`,
      email: `test${id}@example.com`,
      phone: `138${String(id).padStart(8, '0').substring(0, 8)}`,
      role: Math.floor(random * 10),
      status: ['ACTIVE', 'INACTIVE', 'SUSPENDED'][Math.floor(random * 3)] as any,
      avatar_url: `https://example.com/avatar${id}.jpg`,
      github_id: `github${id}`
    };
  }

  /**
   * 生成随机用户档案数据
   */
  static generateUserProfile(seed?: number) {
    const random = seed ? Math.sin(seed) * 10000 - Math.floor(Math.sin(seed) * 10000) : Math.random();
    const id = Math.floor(random * 1000000);
    return {
      user_id: String(id),
      bio: `This is a test bio for user ${id}`,
      resume_content: `Test resume content for user ${id}. This is a sample resume.`,
      tags: JSON.stringify(['developer', 'tester']),
      social_links: JSON.stringify({
        github: `https://github.com/user${id}`,
        linkedin: `https://linkedin.com/in/user${id}`
      }),
      skin_id: `skin${id}`,
      current_map: ['plaza', 'forest', 'beach', 'mountain'][Math.floor(random * 4)],
      pos_x: random * 1000,
      pos_y: random * 1000,
      status: Math.floor(random * 3)
    };
  }

  /**
   * 生成随机Zulip账号数据
   */
  static generateZulipAccount(seed?: number) {
    const random = seed ? Math.sin(seed) * 10000 - Math.floor(Math.sin(seed) * 10000) : Math.random();
    const id = Math.floor(random * 1000000);
    const statuses = ['active', 'inactive', 'suspended', 'error'] as const;
    return {
      gameUserId: String(id),
      zulipUserId: Math.floor(random * 999999) + 1,
      zulipEmail: `zulip${id}@example.com`,
      zulipFullName: `Zulip User ${id}`,
      zulipApiKeyEncrypted: `encrypted_key_${id}`,
      status: statuses[Math.floor(random * 4)]
    };
  }

  /**
   * 生成随机分页参数
   */
  static generatePaginationParams(seed?: number) {
    const random = seed ? Math.sin(seed) * 10000 - Math.floor(Math.sin(seed) * 10000) : Math.random();
    return {
      limit: Math.floor(random * 100) + 1,
      offset: Math.floor(random * 1000)
    };
  }

  /**
   * 生成边界值测试数据
   */
  static generateBoundaryValues() {
    return {
      limits: [0, 1, 50, 100, 101, 999, 1000],
      offsets: [0, 1, 100, 999, 1000, 9999],
      strings: ['', 'a', 'x'.repeat(50), 'x'.repeat(255), 'x'.repeat(256)],
      numbers: [-1, 0, 1, 999, 1000, 9999, 99999]
    };
  }
}

/**
 * 属性测试断言工具
 */
export class PropertyTestAssertions {
  /**
   * 验证API响应格式一致性
   */
  static assertApiResponseFormat(response: any, shouldHaveData: boolean = true) {
    expect(response).toHaveProperty('success');
    expect(response).toHaveProperty('message');
    expect(response).toHaveProperty('timestamp');
    expect(response).toHaveProperty('request_id');
    
    expect(typeof response.success).toBe('boolean');
    expect(typeof response.message).toBe('string');
    expect(typeof response.timestamp).toBe('string');
    expect(typeof response.request_id).toBe('string');

    if (shouldHaveData && response.success) {
      expect(response).toHaveProperty('data');
    }

    if (!response.success) {
      expect(response).toHaveProperty('error_code');
      expect(typeof response.error_code).toBe('string');
    }
  }

  /**
   * 验证列表响应格式
   */
  static assertListResponseFormat(response: any) {
    this.assertApiResponseFormat(response, true);
    
    expect(response.data).toHaveProperty('items');
    expect(response.data).toHaveProperty('total');
    expect(response.data).toHaveProperty('limit');
    expect(response.data).toHaveProperty('offset');
    expect(response.data).toHaveProperty('has_more');

    expect(Array.isArray(response.data.items)).toBe(true);
    expect(typeof response.data.total).toBe('number');
    expect(typeof response.data.limit).toBe('number');
    expect(typeof response.data.offset).toBe('number');
    expect(typeof response.data.has_more).toBe('boolean');
  }

  /**
   * 验证分页逻辑正确性
   */
  static assertPaginationLogic(response: any, requestedLimit: number, requestedOffset: number) {
    this.assertListResponseFormat(response);
    
    const { items, total, limit, offset, has_more } = response.data;
    
    // 验证分页参数
    expect(limit).toBeLessThanOrEqual(100); // 最大限制
    expect(offset).toBeGreaterThanOrEqual(0);
    
    // 验证has_more逻辑
    const expectedHasMore = offset + items.length < total;
    expect(has_more).toBe(expectedHasMore);
    
    // 验证返回项目数量
    expect(items.length).toBeLessThanOrEqual(limit);
  }

  /**
   * 验证CRUD操作一致性
   */
  static assertCrudConsistency(createResponse: any, readResponse: any, updateResponse: any) {
    // 创建和读取的数据应该一致
    expect(createResponse.success).toBe(true);
    expect(readResponse.success).toBe(true);
    expect(createResponse.data.id).toBe(readResponse.data.id);
    
    // 更新后的数据应该反映变更
    expect(updateResponse.success).toBe(true);
    expect(updateResponse.data.id).toBe(createResponse.data.id);
  }
}

/**
 * 属性测试运行器
 */
export class PropertyTestRunner {
  static async runPropertyTest<T>(
    testName: string,
    generator: () => T,
    testFunction: (input: T) => Promise<void>,
    config: PropertyTestConfig = DEFAULT_PROPERTY_CONFIG
  ): Promise<void> {
    const logger = new Logger('PropertyTestRunner');
    logger.log(`Running property test: ${testName} with ${config.iterations} iterations`);
    
    const failures: Array<{ iteration: number; input: T; error: any }> = [];
    
    for (let i = 0; i < config.iterations; i++) {
      try {
        const input = generator();
        await testFunction(input);
      } catch (error) {
        failures.push({
          iteration: i,
          input: generator(), // 重新生成用于错误报告
          error
        });
      }
    }
    
    if (failures.length > 0) {
      const failureRate = (failures.length / config.iterations) * 100;
      logger.error(`Property test failed: ${failures.length}/${config.iterations} iterations failed (${failureRate.toFixed(2)}%)`);
      logger.error('First failure:', failures[0]);
      throw new Error(`Property test "${testName}" failed with ${failures.length} failures`);
    }
    
    logger.log(`Property test "${testName}" passed all ${config.iterations} iterations`);
  }
}