import db from '../config/database';
import { logger } from '../utils/logger';
import { DecisionExplainabilityEngine } from '../core/ai/DecisionExplainabilityEngine';

/**
 * [BIZ_OPS_153] 高客单价商品强行验货流程建议 (QA)
 * @description 核心逻辑：针对单价超过 $500 的高客单价 SKU，自动在采购流程中插入“强制人工验货”建议，降低售后成本。
 */
export class HighValueQAService {
  /**
   * 识别高价值商品并建议强行验货 (BIZ_OPS_153)
   */
  static async suggestHighValueQA(tenantId: string, productId: string): Promise<any> {
    logger.info(`[HighValueQA] Auditing product value for: ${productId}`);

    try {
      const product = await db('cf_product').where({ id: productId }).first();
      const price = product.price || 0;
      const threshold = 500;

      if (price > threshold) {
        const advice = `HIGH VALUE ALERT: Product ${productId} unit price ($${price}) exceeds $${threshold}. ` +
          `Suggesting mandatory 100% QA inspection at warehouse before shipping to consumer.`;

        // 记录决策
        await DecisionExplainabilityEngine.logDecision({
          tenantId,
          module: 'QUALITY_ASSURANCE',
          resourceId: productId,
          decisionType: 'MANDATORY_QA_SUGGESTION',
          causalChain: advice,
          factors: [
            { name: 'UnitPrice', value: price, weight: 1.0, impact: 'NEGATIVE' }
          ],
          traceId: 'qa-suggest-' + Date.now()
        });

        return { success: true, advice, status: 'PENDING_REVIEW' };
      }

      return { success: true, message: 'Value within standard limits' };
    } catch (err: any) {
      logger.error(`[HighValueQA][WARN] Audit failed: ${err.message}`);
      return { success: false, error: err.message };
    }
  }
}
