const { DataTypes } = require('sequelize');
const sequelize = require('../config/db');

const TenantCouponUsage = sequelize.define('TenantCouponUsage', {
  id: {
    type: DataTypes.INTEGER,
    primaryKey: true,
    autoIncrement: true,
    comment: '记录ID'
  },
  tenantId: {
    type: DataTypes.INTEGER,
    allowNull: false,
    comment: '租户ID'
  },
  couponId: {
    type: DataTypes.INTEGER,
    allowNull: false,
    comment: '优惠券ID'
  },
  orderId: {
    type: DataTypes.INTEGER,
    allowNull: false,
    comment: '订单ID'
  },
  discountAmount: {
    type: DataTypes.DECIMAL(10, 2),
    allowNull: false,
    comment: '实际优惠金额'
  },
  usedAt: {
    type: DataTypes.DATE,
    defaultValue: DataTypes.NOW,
    comment: '使用时间'
  }
}, {
  tableName: 'tenant_coupon_usage',
  timestamps: false,
  indexes: [
    { fields: ['tenantId', 'couponId', 'orderId'], unique: true },
    { fields: ['tenantId'] },
    { fields: ['couponId'] }
  ],
  comment: '租户优惠券使用记录表'
});

module.exports = TenantCouponUsage;