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

/**
 * [BIZ_ECO_01] 自治供应链生态系统 (Autonomous Eco)
 * 负责代理自动寻找、评估并签约全球供应商，实现供应链的自我演化
 */
export class AutonomousEcoService {
  /**
   * 初始化表结构
   */
  static async initTable() {
    const hasTable = await db.schema.hasTable('cf_autonomous_eco_contracts');
    if (!hasTable) {
      console.log('📦 Creating cf_autonomous_eco_contracts table...');
      await db.schema.createTable('cf_autonomous_eco_contracts', (table) => {
        table.increments('id').primary();
        table.string('tenant_id', 64).notNullable().index();
        table.string('supplier_id', 64).notNullable();
        table.string('contract_hash', 128).notNullable();
        table.json('sla_terms');
        table.string('status', 16).defaultTo('SIGNED');
        table.timestamps(true, true);
      });
      console.log('✅ Table cf_autonomous_eco_contracts created');
    }
  }

  /**
   * 自动寻找并评估新供应商
   */
  static async discoverAndEvaluateSuppliers(tenantId: string, category: string, traceId: string): Promise<void> {
    // 1. 全网供应商扫描 (模拟调用 AI 供应商库扫描)
    const candidates = await AIService.scanGlobalSuppliers(category);
    
    for (const supplier of candidates) {
      // 2. 深度风险评估 (BIZ_SC_14 Risk Radar 联动)
      const riskScore = await AIService.evaluateSupplierRisk(supplier.id);
      
      if (riskScore < 0.3) { // 风险低于 0.3 视为优质
        await db.transaction(async (trx) => {
          // 3. 自动生成并签约 SLA (智能合约模拟)
          const contractHash = 'HASH-' + Math.random().toString(36).substring(7).toUpperCase();
          const slaTerms = {
            deliveryLeadTime: 7,
            qualityPassRate: 0.99,
            paymentTerm: 'NET_30'
          };

          await trx('cf_autonomous_eco_contracts').insert({
            tenant_id: tenantId,
            supplier_id: supplier.id,
            contract_hash: contractHash,
            sla_terms: JSON.stringify(slaTerms),
            status: 'SIGNED'
          });

          // 4. 将供应商加入可用列表
          await trx('cf_suppliers').insert({
            tenant_id: tenantId,
            supplier_id: supplier.id,
            name: supplier.name,
            category,
            rating: 5,
            status: 'ACTIVE'
          });

          // 审计记录
          await AuditService.log({
            tenant_id: tenantId,
            action: 'AUTONOMOUS_SUPPLIER_SIGNED',
            target_type: 'SUPPLIER',
            target_id: supplier.id,
            trace_id: traceId,
            new_data: JSON.stringify({ contractHash, slaTerms }),
            metadata: JSON.stringify({ category })
          });
        });
      }
    }
  }

  /**
   * 获取租户所有自治签约的合同
   */
  static async getContracts(tenantId: string) {
    return await db('cf_autonomous_eco_contracts')
      .where({ tenant_id: tenantId })
      .orderBy('created_at', 'desc');
  }
}