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

/**
 * [BIZ_ECO_06] 自治生产节点动态协调引擎 (ManufacturingCoordinationService)
 * @description 在自治生态中，通过 AGI 实时调度全球各主权国家的生产制造节点，基于订单优先级、原材料供应波动与生产能效进行动态博弈与协同生产。
 */
export class ManufacturingCoordinationService {
  private static readonly COORD_TABLE = 'cf_manufacturing_coord';

  /**
   * 初始化数据库表
   */
  static async initTable() {
    const hasTable = await db.schema.hasTable(this.COORD_TABLE);
    if (!hasTable) {
      logger.info(`📦 Creating ${this.COORD_TABLE} table...`);
      await db.schema.createTable(this.COORD_TABLE, (table) => {
        table.increments('id').primary();
        table.string('tenant_id', 64).notNullable();
        table.string('factory_id', 64).notNullable(); // 生产节点 ID
        table.string('product_id', 64).notNullable(); // 产品 ID
        table.integer('order_quantity').notNullable(); // 订单数量
        table.string('production_status', 32).defaultTo('PENDING'); // PENDING, IN_PRODUCTION, COMPLETED, DELAYED
        table.dateTime('estimated_completion'); // 预估完成日期
        table.json('efficiency_stats'); // { cycle_time, defect_rate, energy_efficiency }
        table.json('supply_chain_constraints'); // { raw_material_status, labor_availability }
        table.string('trace_id', 128);
        table.timestamps(true, true);
        table.index(['factory_id', 'production_status']);
      });
      logger.info(`✅ Table ${this.COORD_TABLE} created`);
    }
  }

  /**
   * 调度生产任务
   */
  static async scheduleProductionTask(
    tenantId: string,
    productId: string,
    quantity: number,
    traceId: string
  ): Promise<string | null> {
    if (!(await FeatureGovernanceService.isEnabled('BIZ_ECO_MANUFACTURING_COORD', tenantId))) {
      return null;
    }

    logger.info(`[ManufacturingCoordination] Scheduling production for product ${productId} | quantity: ${quantity} | traceId: ${traceId}`);

    // 1. 获取所有可用生产节点
    const factories = await db(this.COORD_TABLE)
      .where({ production_status: 'COMPLETED' })
      .orWhere({ production_status: 'PENDING' })
      .limit(10); // 模拟获取活跃节点

    if (factories.length === 0) {
      logger.error(`[ManufacturingCoordination] No available production nodes found | traceId: ${traceId}`);
      return null;
    }

    // 2. 调用 AGI “生产博弈调度引擎”
    const prompt = `Schedule production for ${quantity} of product ${productId} among factories: ${JSON.stringify(factories)}. Consider efficiency, raw material supply, and lead time.`;
    const decision = await AIService.generateStrategy(prompt, traceId);

    // 3. 解析 AGI 决策结果 (模拟解析逻辑)
    // 假设 AGI 返回格式：FACTORY:FAC_CN_01,ETA:2026-04-15
    const selectedFactoryId = decision.includes('FACTORY:') ? decision.split('FACTORY:')[1].split(',')[0] : 'FAC_CN_01';
    const eta = decision.includes('ETA:') ? new Date(decision.split('ETA:')[1].split(',')[0]) : new Date();
    eta.setDate(eta.getDate() + 15); // 默认 15 天后

    // 4. 持久化生产调度记录
    await db(this.COORD_TABLE).insert({
      tenant_id: tenantId,
      factory_id: selectedFactoryId,
      product_id: productId,
      order_quantity: quantity,
      production_status: 'IN_PRODUCTION',
      estimated_completion: eta,
      efficiency_stats: JSON.stringify({
        cycle_time: '12 days',
        defect_rate: '0.1%',
        energy_efficiency: 'A'
      }),
      supply_chain_constraints: JSON.stringify({
        raw_material_status: 'STABLE',
        labor_availability: 'NORMAL'
      }),
      trace_id: traceId,
      created_at: new Date(),
      updated_at: new Date()
    });

    logger.info(`[ManufacturingCoordination] AGI scheduled Factory ${selectedFactoryId} for product ${productId} | traceId: ${traceId}`);
    
    // 5. 联动工厂监控 (模拟)
    // TODO: 调用 FactoryMonitorService 启动实时监控
    return selectedFactoryId;
  }

  /**
   * 自动监控并更新生产进度 (AGI 驱动)
   */
  static async updateProductionProgress(traceId: string) {
    const activeTasks = await db(this.COORD_TABLE).where({ production_status: 'IN_PRODUCTION' });
    if (activeTasks.length === 0) return;

    logger.info(`[ManufacturingCoordination] Start AGI monitoring for ${activeTasks.length} active tasks | traceId: ${traceId}`);

    for (const task of activeTasks) {
      // 模拟：从工厂 API 获取进度
      const progress = Math.random() * 100;
      
      if (progress >= 100) {
        await db(this.COORD_TABLE)
          .where({ id: task.id })
          .update({
            production_status: 'COMPLETED',
            updated_at: new Date()
          });
        logger.info(`[ManufacturingCoordination] Task ID ${task.id} completed! | traceId: ${traceId}`);
      }
    }
  }
}
