import db from '../config/database';
import { AuditService } from './AuditService';
import { AIService } from './AIService';
import { crypto } from 'crypto';

/**
 * [BIZ_SOV_01] 跨平台贸易主权证书体系 (Sovereignty Identity)
 * 负责建立不依赖单一平台的商家数字身份资产 (DID)，并聚合全网声誉数据
 */
export class SovereigntyIdentityService {
  /**
   * 为租户初始化主权身份 (DID)
   */
  static async initializeIdentity(tenantId: string, traceId: string): Promise<string> {
    const existing = await db('cf_sovereignty_identity').where({ tenant_id: tenantId }).first();
    if (existing) return existing.did;

    // 1. 生成 DID 与密钥对 (模拟)
    const did = `did:crawlful:${tenantId}-${Date.now()}`;
    const publicKey = 'PUB-' + Math.random().toString(36).substring(7).toUpperCase();

    await db.transaction(async (trx) => {
      await trx('cf_sovereignty_identity').insert({
        tenant_id: tenantId,
        did,
        public_key: publicKey,
        reputation_score: JSON.stringify({ 
          fulfillment: 95, 
          quality: 98, 
          communication: 92,
          global_rank: 'TOP_5_PERCENT'
        }),
        status: 'ACTIVE'
      });

      // 审计记录
      await AuditService.log({
        tenant_id: tenantId,
        action: 'SOVEREIGNTY_IDENTITY_CREATED',
        target_type: 'TENANT_IDENTITY',
        target_id: tenantId,
        trace_id: traceId,
        new_data: JSON.stringify({ did, publicKey }),
        metadata: JSON.stringify({ version: 'V27.0 Initial' })
      });
    });

    return did;
  }

  /**
   * 聚合跨平台声誉 (BIZ_SOV_01)
   */
  static async syncCrossPlatformReputation(tenantId: string, traceId: string): Promise<void> {
    // 1. 模拟从 Amazon, TikTok, Shopee 采集商家评分
    const platforms = ['Amazon', 'TikTok', 'Shopee'];
    const scores = await Promise.all(platforms.map(p => AIService.getPlatformReputation(tenantId, p)));
    
    // 2. 计算加权综合评分
    const averageScore = scores.reduce((a, b) => a + b, 0) / scores.length;

    await db('cf_sovereignty_identity')
      .where({ tenant_id: tenantId })
      .update({
        reputation_score: db.raw('JSON_SET(reputation_score, "$.aggregated_market_score", ?)', [averageScore]),
        updated_at: db.fn.now()
      });

    await AuditService.log({
      tenant_id: tenantId,
      action: 'REPUTATION_SYNCED',
      target_type: 'TENANT_IDENTITY',
      target_id: tenantId,
      trace_id: traceId,
      new_data: JSON.stringify({ averageScore }),
      metadata: JSON.stringify({ platforms })
    });
  }

  /**
   * 获取租户主权身份信息
   */
  static async getIdentity(tenantId: string) {
    return await db('cf_sovereignty_identity').where({ tenant_id: tenantId }).first();
  }
}
