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

/**
 * [BIZ_TRADE_24] 主权跨境物流协议 V2 (SovereignLogisticsV2Service)
 * @description 升级物流协议。集成主权 DID 与 ZKP 技术，实现自动化主权报关、主权级履约共识与基于 AGI 的最优主权路由。
 */
export class SovereignLogisticsV2Service {
  private static readonly LOGISTICS_V2_TABLE = 'cf_sov_logistics_v2';

  /**
   * 初始化数据库表
   */
  static async initTable() {
    const hasTable = await db.schema.hasTable(this.LOGISTICS_V2_TABLE);
    if (!hasTable) {
      logger.info(`📦 Creating ${this.LOGISTICS_V2_TABLE} table...`);
      await db.schema.createTable(this.LOGISTICS_V2_TABLE, (table) => {
        table.increments('id').primary();
        table.string('order_id', 64).notNullable();
        table.string('tenant_id', 64).notNullable();
        table.string('origin_sovereign', 16).notNullable();
        table.string('dest_sovereign', 16).notNullable();
        table.string('did_proof_hash', 255); // DID 报关证明
        table.string('fulfillment_consensus_hash', 255); // 履约共识哈希
        table.string('status', 32).defaultTo('INITIATED'); // INITIATED, CLEARED, IN_TRANSIT, DELIVERED
        table.json('sovereign_routing'); // { hops, sovereign_fees, compliance_flags }
        table.string('trace_id', 128);
        table.timestamps(true, true);
        table.index(['order_id', 'status']);
      });
      logger.info(`✅ Table ${this.LOGISTICS_V2_TABLE} created`);
    }
  }

  /**
   * 启动主权级跨境履约
   */
  static async initiateSovereignFulfillment(
    tenantId: string,
    orderId: string,
    origin: string,
    dest: string,
    traceId: string
  ): Promise<boolean> {
    if (!(await FeatureGovernanceService.isEnabled('BIZ_TRADE_SOV_LOGISTICS_V2', tenantId))) {
      return false;
    }

    logger.info(`[SovereignLogisticsV2] Initiating fulfillment for order ${orderId} | traceId: ${traceId}`);

    // 1. AGI 计算最优主权路由
    const routePrompt = `Calculate optimal sovereign route from ${origin} to ${dest} for order ${orderId}. Consider sovereign fees and real-time customs status.`;
    const routing = await AIService.generateStrategy(routePrompt, traceId);

    // 2. 生成主权报关 ZKP (模拟)
    const didProof = 'DID-SOV-CLEAR-' + Math.random().toString(36).substring(7).toUpperCase();

    // 3. 记录物流任务
    await db(this.LOGISTICS_V2_TABLE).insert({
      order_id: orderId,
      tenant_id: tenantId,
      origin_sovereign: origin,
      dest_sovereign: dest,
      did_proof_hash: didProof,
      status: 'INITIATED',
      sovereign_routing: JSON.stringify({ route: routing, fees: 'AGI_CALCULATED' }),
      trace_id: traceId,
      created_at: new Date(),
      updated_at: new Date()
    });

    logger.info(`[SovereignLogisticsV2] Sovereign routing calculated and DID proof generated | traceId: ${traceId}`);
    return true;
  }

  /**
   * 验证履约共识 (联动物流节点)
   */
  static async verifyFulfillmentConsensus(orderId: string, consensusHash: string, traceId: string) {
    logger.info(`[SovereignLogisticsV2] Verifying consensus for order ${orderId} | traceId: ${traceId}`);

    await db(this.LOGISTICS_V2_TABLE)
      .where({ order_id: orderId })
      .update({
        fulfillment_consensus_hash: consensusHash,
        status: 'DELIVERED',
        updated_at: new Date()
      });
    
    // TODO: 触发 SovereignLedgerService 记录最终价值交换
  }
}
