import { SecurityConfig, SecurityStatus, ComplianceCheck, ComplianceResult } from '../types/security';
import { logger } from '../utils/logger';

/**
 * 安全合规服务
 * 负责管理系统的安全配置和合规检查
 */
export class SecurityComplianceService {
  private static securityConfigs: Map<string, SecurityConfig> = new Map();
  private static securityStatus: Map<string, SecurityStatus> = new Map();
  private static complianceChecks: Map<string, ComplianceCheck> = new Map();

  /**
   * 配置安全设置
   * @param config 安全配置
   * @returns 配置结果
   */
  static async configureSecurity(config: SecurityConfig): Promise<{ success: boolean; message: string }> {
    try {
      this.securityConfigs.set(config.id, config);
      this.securityStatus.set(config.id, {
        status: 'ACTIVE',
        lastUpdated: new Date(),
        complianceLevel: 'COMPLIANT'
      });

      logger.info(`Security config ${config.id} configured successfully`);
      return { success: true, message: 'Security config configured successfully' };
    } catch (error) {
      logger.error(`Error configuring security: ${error}`);
      return { success: false, message: `Error configuring security: ${error}` };
    }
  }

  /**
   * 执行合规检查
   * @param checkId 检查ID
   * @param target 检查目标
   * @returns 合规检查结果
   */
  static async runComplianceCheck(checkId: string, target: string): Promise<ComplianceResult> {
    try {
      const check = this.complianceChecks.get(checkId);
      if (!check) {
        return {
          checkId,
          target,
          status: 'ERROR',
          message: 'Compliance check not found',
          timestamp: new Date(),
          details: {}
        };
      }

      // 模拟合规检查
      await new Promise(resolve => setTimeout(resolve, 1500));

      // 随机生成合规结果
      const isCompliant = Math.random() > 0.2; // 80% 概率合规

      const result: ComplianceResult = {
        checkId,
        target,
        status: isCompliant ? 'COMPLIANT' : 'NON_COMPLIANT',
        message: isCompliant ? 'Compliance check passed' : 'Compliance check failed',
        timestamp: new Date(),
        details: {
          checkType: check.type,
          severity: check.severity,
          remediation: isCompliant ? null : `Please fix ${check.type} issues in ${target}`
        }
      };

      logger.info(`Compliance check ${checkId} completed for ${target}, result: ${result.status}`);
      return result;
    } catch (error) {
      logger.error(`Error running compliance check: ${error}`);
      return {
        checkId,
        target,
        status: 'ERROR',
        message: `Error running compliance check: ${error}`,
        timestamp: new Date(),
        details: {}
      };
    }
  }

  /**
   * 注册合规检查
   * @param check 合规检查配置
   * @returns 注册结果
   */
  static async registerComplianceCheck(check: ComplianceCheck): Promise<{ success: boolean; message: string }> {
    try {
      this.complianceChecks.set(check.id, check);

      logger.info(`Compliance check ${check.id} registered successfully`);
      return { success: true, message: 'Compliance check registered successfully' };
    } catch (error) {
      logger.error(`Error registering compliance check: ${error}`);
      return { success: false, message: `Error registering compliance check: ${error}` };
    }
  }

  /**
   * 获取安全状态
   * @param configId 配置ID
   * @returns 安全状态
   */
  static async getSecurityStatus(configId: string): Promise<SecurityStatus | null> {
    try {
      const status = this.securityStatus.get(configId);
      if (!status) {
        return null;
      }

      return status;
    } catch (error) {
      logger.error(`Error getting security status: ${error}`);
      return null;
    }
  }

  /**
   * 列出所有安全配置
   * @returns 安全配置列表
   */
  static async listSecurityConfigs(): Promise<Array<{ id: string; config: SecurityConfig; status: SecurityStatus }>> {
    try {
      const configs: Array<{ id: string; config: SecurityConfig; status: SecurityStatus }> = [];

      for (const [id, config] of this.securityConfigs.entries()) {
        const status = this.securityStatus.get(id) || {
          status: 'INACTIVE',
          lastUpdated: new Date(),
          complianceLevel: 'UNKNOWN'
        };
        configs.push({ id, config, status });
      }

      return configs;
    } catch (error) {
      logger.error(`Error listing security configs: ${error}`);
      return [];
    }
  }

  /**
   * 列出所有合规检查
   * @returns 合规检查列表
   */
  static async listComplianceChecks(): Promise<ComplianceCheck[]> {
    try {
      return Array.from(this.complianceChecks.values());
    } catch (error) {
      logger.error(`Error listing compliance checks: ${error}`);
      return [];
    }
  }

  /**
   * 执行所有合规检查
   * @param target 检查目标
   * @returns 合规检查结果列表
   */
  static async runAllComplianceChecks(target: string): Promise<ComplianceResult[]> {
    try {
      const results: ComplianceResult[] = [];

      for (const check of this.complianceChecks.values()) {
        const result = await this.runComplianceCheck(check.id, target);
        results.push(result);
      }

      return results;
    } catch (error) {
      logger.error(`Error running all compliance checks: ${error}`);
      return [];
    }
  }

  /**
   * 更新安全配置
   * @param configId 配置ID
   * @param updates 更新内容
   * @returns 更新结果
   */
  static async updateSecurityConfig(configId: string, updates: Partial<SecurityConfig>): Promise<{ success: boolean; message: string }> {
    try {
      const config = this.securityConfigs.get(configId);
      if (!config) {
        return { success: false, message: 'Security config not found' };
      }

      // 更新配置
      const updatedConfig = { ...config, ...updates };
      this.securityConfigs.set(configId, updatedConfig);

      // 更新状态
      const status = this.securityStatus.get(configId);
      if (status) {
        status.lastUpdated = new Date();
        this.securityStatus.set(configId, status);
      }

      logger.info(`Security config ${configId} updated successfully`);
      return { success: true, message: 'Security config updated successfully' };
    } catch (error) {
      logger.error(`Error updating security config: ${error}`);
      return { success: false, message: `Error updating security config: ${error}` };
    }
  }

  /**
   * 删除安全配置
   * @param configId 配置ID
   * @returns 删除结果
   */
  static async deleteSecurityConfig(configId: string): Promise<{ success: boolean; message: string }> {
    try {
      const config = this.securityConfigs.get(configId);
      if (!config) {
        return { success: false, message: 'Security config not found' };
      }

      this.securityConfigs.delete(configId);
      this.securityStatus.delete(configId);

      logger.info(`Security config ${configId} deleted successfully`);
      return { success: true, message: 'Security config deleted successfully' };
    } catch (error) {
      logger.error(`Error deleting security config: ${error}`);
      return { success: false, message: `Error deleting security config: ${error}` };
    }
  }

  /**
   * 删除合规检查
   * @param checkId 检查ID
   * @returns 删除结果
   */
  static async deleteComplianceCheck(checkId: string): Promise<{ success: boolean; message: string }> {
    try {
      const check = this.complianceChecks.get(checkId);
      if (!check) {
        return { success: false, message: 'Compliance check not found' };
      }

      this.complianceChecks.delete(checkId);

      logger.info(`Compliance check ${checkId} deleted successfully`);
      return { success: true, message: 'Compliance check deleted successfully' };
    } catch (error) {
      logger.error(`Error deleting compliance check: ${error}`);
      return { success: false, message: `Error deleting compliance check: ${error}` };
    }
  }

  /**
   * 生成安全报告
   * @returns 安全报告
   */
  static async generateSecurityReport(): Promise<{ success: boolean; report: any; message: string }> {
    try {
      const configs = await this.listSecurityConfigs();
      const checks = await this.listComplianceChecks();

      const report = {
        generatedAt: new Date(),
        summary: {
          totalConfigs: configs.length,
          totalChecks: checks.length,
          compliantConfigs: configs.filter(c => c.status.complianceLevel === 'COMPLIANT').length
        },
        details: {
          configs,
          checks
        }
      };

      logger.info('Security report generated successfully');
      return { success: true, report, message: 'Security report generated successfully' };
    } catch (error) {
      logger.error(`Error generating security report: ${error}`);
      return { success: false, report: null, message: `Error generating security report: ${error}` };
    }
  }
}
