import db from '../config/database';
import { logger } from '../utils/logger';
import { AIService } from './AIService';
import { FeatureGovernanceService } from '../core/governance/FeatureGovernanceService';

/**
 * [BIZ_TRADE_GEO_01] 全球地缘政治风险对冲与弹性调度 (GeopoliticalRiskHedgeService)
 * @description 基于 AGI 实时监控全球地缘政治动态（关税、贸易禁令、制裁、地缘冲突），动态调整供应链拓扑，实现主权级的风险对冲。
 */
export class GeopoliticalRiskHedgeService {
  private static readonly RISK_TABLE = 'cf_geo_risk_hedge';

  /**
   * 初始化数据库表
   */
  static async initTable() {
    const hasTable = await db.schema.hasTable(this.RISK_TABLE);
    if (!hasTable) {
      logger.info(`📦 Creating ${this.RISK_TABLE} table...`);
      await db.schema.createTable(this.RISK_TABLE, (table) => {
        table.increments('id').primary();
        table.string('tenant_id', 64).notNullable();
        table.string('region_code', 16).notNullable();
        table.decimal('risk_score', 5, 2); // 0-100
        table.string('risk_type', 64); // TARIFF, EMBARGO, CONFLICT, REGULATORY
        table.text('impact_analysis');
        table.json('mitigation_strategy'); // 对冲策略 (e.g., reroute, alternative sourcing)
        table.string('status', 32).defaultTo('MONITORING'); // MONITORING, ALERT, MITIGATED
        table.string('trace_id', 128);
        table.timestamps(true, true);
        table.index(['region_code', 'status']);
      });
      logger.info(`✅ Table ${this.RISK_TABLE} created`);
    }
  }

  /**
   * 评估并对冲地缘政治风险
   */
  static async evaluateAndHedge(tenantId: string, regionCode: string, traceId: string): Promise<boolean> {
    if (!(await FeatureGovernanceService.isEnabled('BIZ_TRADE_GEO_HEDGE', tenantId))) {
      return false;
    }

    logger.info(`[GeoRiskHedge] Evaluating geopolitical risk for tenant ${tenantId} in region ${regionCode} | traceId: ${traceId}`);

    // 1. 获取 AGI 实时风险分析
    const riskAnalysis = await AIService.analyzeSecurityRisk(`Analyze geopolitical risk for trade region ${regionCode}`, traceId);
    
    // 2. 解析风险评分与类型 (模拟逻辑)
    const riskScore = riskAnalysis.includes('HIGH') ? 85.5 : 20.0;
    const riskType = riskAnalysis.includes('TARIFF') ? 'TARIFF' : 'REGULATORY';

    if (riskScore > 50) {
      logger.warn(`[GeoRiskHedge] High risk detected in ${regionCode} (Score: ${riskScore})! Generating mitigation strategy...`);

      // 3. 调用 AGI 生成弹性调度策略
      const strategyPrompt = `Generate mitigation strategy for ${riskType} risk in ${regionCode} with score ${riskScore}. Analysis: ${riskAnalysis}`;
      const strategy = await AIService.generateStrategy(strategyPrompt, traceId);

      // 4. 持久化风险对冲记录
      await db(this.RISK_TABLE).insert({
        tenant_id: tenantId,
        region_code: regionCode,
        risk_score: riskScore,
        risk_type: riskType,
        impact_analysis: riskAnalysis,
        mitigation_strategy: JSON.stringify({
          strategy: strategy,
          recommended_nodes: ['NODE_SG_01', 'NODE_VN_02'],
          estimated_cost_increase: '12%'
        }),
        status: 'ALERT',
        trace_id: traceId,
        created_at: new Date(),
        updated_at: new Date()
      });

      // 5. 触发弹性调度 (模拟)
      // TODO: 调用 DynamicRecompositionService 进行供应链重组
      return true;
    }

    return false;
  }
}