import db from '../config/database';
import { logger } from '../utils/logger';
import { FXHedgingService } from './FXHedgingService';

/**
 * [BIZ_FIN_04] 基于汇率预测的自动结汇策略
 * @description 核心逻辑：利用 AI 预测汇率走势，在汇率高点自动执行换汇与结汇动作
 */
export class PredictiveFXService {
  /**
   * 运行预测与结汇任务
   */
  static async runAutoExchange(tenantId: string): Promise<void> {
    logger.info(`[PredictiveFX] Running auto-exchange check for Tenant: ${tenantId}`);

    // 1. 获取当前汇率与 AI 预测走势
    const currentRate = 7.23; // Mock
    const predictedTrend = 'UPWARD'; // AI 预测未来 24 小时走势

    // 2. 检查待结汇金额 (USD)
    const pendingUSD = 15000; // Mock: 从 cf_orders 汇总

    // 3. 执行策略决策
    if (predictedTrend === 'UPWARD' && currentRate >= 7.25) {
      logger.info(`[PredictiveFX] AI signal: SELL USD at ${currentRate}. Triggering auto-exchange.`);
      await this.executeExchange(tenantId, pendingUSD, currentRate);
    } else {
      logger.info('[PredictiveFX] AI signal: HOLD. Current rate does not meet optimal exchange threshold.');
    }
  }

  private static async executeExchange(tenantId: string, amount: number, rate: number) {
    logger.info(`[PredictiveFX] Executed exchange for ${amount} USD at rate ${rate}`);
    // 逻辑：调用第三方支付/银行 API 执行换汇
  }
}
