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

export interface MarketingEvent {
  id: string;
  tenantId: string;
  name: string;
  startTime: Date;
  endTime: Date;
  platforms: string[];
  actionType: 'DISCOUNT' | 'COUPON' | 'FLASH_SALE';
  actionConfig: any;
  status: 'SCHEDULED' | 'RUNNING' | 'COMPLETED' | 'CANCELLED';
}

/**
 * [BIZ_AUTO_03] 多渠道营销日历自动执行
 * @description 核心逻辑：基于预设日历自动在多个平台执行促销、折扣与营销动作
 */
export class MarketingCalendarService {
  private static readonly TABLE_NAME = 'cf_marketing_calendar';

  /**
   * 检查并执行到期的营销动作
   */
  static async checkAndExecute(): Promise<void> {
    const now = new Date();
    const pendingEvents = await db(this.TABLE_NAME)
      .where('start_time', '<=', now)
      .andWhere({ status: 'SCHEDULED' });

    for (const event of pendingEvents) {
      logger.info(`[Marketing] Starting event: ${event.name} for Tenant: ${event.tenant_id}`);
      
      // 执行跨平台营销分发 (Mock)
      await this.dispatchToPlatforms(event);

      await db(this.TABLE_NAME).where({ id: event.id }).update({
        status: 'RUNNING',
        updated_at: new Date()
      });
    }
  }

  private static async dispatchToPlatforms(event: any) {
    // 逻辑：联动 DynamicPricingV3Service 执行跨平台改价
    logger.info(`[Marketing] Dispatched ${event.action_type} to platforms: ${event.platforms}`);
    
    const platforms = JSON.parse(event.platforms);
    for (const platform of platforms) {
      // 模拟下发改价指令
      logger.info(`[Marketing] Executing ${event.action_type} on ${platform} for event ${event.id}`);
    }
  }

  /**
   * 初始化表
   */
  static async initTable() {
    const exists = await db.schema.hasTable(this.TABLE_NAME);
    if (!exists) {
      logger.info(`📦 Creating ${this.TABLE_NAME} table...`);
      await db.schema.createTable(this.TABLE_NAME, (table) => {
        table.string('id', 64).primary();
        table.string('tenant_id', 64).notNullable();
        table.string('name', 128).notNullable();
        table.timestamp('start_time').notNullable();
        table.timestamp('end_time').notNullable();
        table.json('platforms').notNullable();
        table.string('action_type', 32).notNullable();
        table.json('action_config');
        table.string('status', 32).defaultTo('SCHEDULED');
        table.timestamps(true, true);

        table.index(['tenant_id', 'status']);
      });
      logger.info(`✅ Table ${this.TABLE_NAME} created`);
    }
  }
}
