import { logger } from '../utils/logger';

export interface ReconciliationRecord {
  id: string;
  tenantId: string;
  shopId: string;
  platform: string;
  periodStart: Date;
  periodEnd: Date;
  expectedAmount: number;
  actualAmount: number;
  difference: number;
  status: 'PENDING' | 'PROCESSING' | 'COMPLETED' | 'EXCEPTION';
  exceptionDetails: string;
  traceId: string;
  taskId: string;
  businessType: 'TOC' | 'TOB';
  createdAt: Date;
  updatedAt: Date;
}

export interface CreateReconciliationParams {
  tenantId: string;
  shopId: string;
  platform: string;
  periodStart: Date;
  periodEnd: Date;
  expectedAmount: number;
  actualAmount: number;
  traceId: string;
  taskId: string;
  businessType: 'TOC' | 'TOB';
}

export interface ReconciliationResult {
  success: boolean;
  record: ReconciliationRecord;
  message: string;
}

export class FinanceReconciliationService {
  /**
   * 初始化数据库表
   */
  static async initTable() {
    logger.info('🚀 FinanceReconciliationService table initialized');
    // 这里可以添加数据库表初始化逻辑
  }

  /**
   * 创建对账记录
   */
  static async createReconciliation(params: CreateReconciliationParams): Promise<ReconciliationResult> {
    logger.info(`[FinanceReconciliationService] Creating reconciliation for platform: ${params.platform}`, { traceId: params.traceId });
    
    const difference = params.expectedAmount - params.actualAmount;
    const status = Math.abs(difference) < 0.01 ? 'COMPLETED' : 'EXCEPTION';
    const exceptionDetails = status === 'EXCEPTION' ? `Amount mismatch: expected ${params.expectedAmount}, actual ${params.actualAmount}, difference ${difference}` : '';
    
    const record: ReconciliationRecord = {
      id: 'reconciliation_' + Date.now(),
      tenantId: params.tenantId,
      shopId: params.shopId,
      platform: params.platform,
      periodStart: params.periodStart,
      periodEnd: params.periodEnd,
      expectedAmount: params.expectedAmount,
      actualAmount: params.actualAmount,
      difference,
      status,
      exceptionDetails,
      traceId: params.traceId,
      taskId: params.taskId,
      businessType: params.businessType,
      createdAt: new Date(),
      updatedAt: new Date()
    };
    
    // 这里可以添加创建对账记录的逻辑
    
    return {
      success: true,
      record,
      message: status === 'COMPLETED' ? 'Reconciliation completed successfully' : 'Reconciliation completed with exceptions'
    };
  }

  /**
   * 获取对账记录列表
   */
  static async getReconciliations(tenantId: string, shopId: string, traceId: string): Promise<ReconciliationRecord[]> {
    logger.info(`[FinanceReconciliationService] Getting reconciliations for tenant: ${tenantId}, shop: ${shopId}`, { traceId });
    // 这里可以添加获取对账记录列表的逻辑
    return [];
  }

  /**
   * 获取对账记录详情
   */
  static async getReconciliationById(id: string, traceId: string): Promise<ReconciliationRecord | null> {
    logger.info(`[FinanceReconciliationService] Getting reconciliation: ${id}`, { traceId });
    // 这里可以添加获取对账记录详情的逻辑
    return null;
  }

  /**
   * 处理异常对账
   */
  static async handleException(id: string, action: string, traceId: string): Promise<ReconciliationResult> {
    logger.info(`[FinanceReconciliationService] Handling exception for reconciliation: ${id}, action: ${action}`, { traceId });
    // 这里可以添加处理异常对账的逻辑
    
    const record: ReconciliationRecord = {
      id,
      tenantId: 'tenant_1',
      shopId: 'shop_1',
      platform: 'AMAZON',
      periodStart: new Date(),
      periodEnd: new Date(),
      expectedAmount: 1000,
      actualAmount: 999.99,
      difference: 0.01,
      status: 'COMPLETED',
      exceptionDetails: 'Exception handled: ' + action,
      traceId,
      taskId: 'task_1',
      businessType: 'TOC',
      createdAt: new Date(),
      updatedAt: new Date()
    };
    
    return {
      success: true,
      record,
      message: 'Exception handled successfully'
    };
  }

  /**
   * 批量对账
   */
  static async batchReconciliation(tenantId: string, shopId: string, platforms: string[], periodStart: Date, periodEnd: Date, traceId: string): Promise<ReconciliationResult[]> {
    logger.info(`[FinanceReconciliationService] Batch reconciliation for platforms: ${platforms.join(', ')}`, { traceId });
    // 这里可以添加批量对账的逻辑
    return [];
  }
}
