package com.example.building.dto;

import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;
import java.math.BigDecimal;
import java.util.List;

/**
 * 创建订单请求DTO
 * 核心业务逻辑：
 * 1. 计算订单原价(total_amount) = Σ(item.price × item.quantity)
 * 2. 计算优惠金额(discount_amount) = total_amount × (100 - discount_rate) / 100
 * 3. 计算实付金额(actual_amount) = total_amount - discount_amount
 */
public class CreateOrderRequest {

    /**
     * 客户ID
     */
    private String customerId;

    /**
     * 订单明细
     */
    @NotEmpty(message = "订单明细不能为空")
    private List<OrderItemDTO> items;

    /**
     * 折扣率(百分比), 默认100
     */
    private BigDecimal discountRate;

    /**
     * 备注
     */
    private String remark;

    /**
     * 支付方式
     */
    private String paymentMethod;

    // Getters and Setters
    public String getCustomerId() {
        return customerId;
    }

    public void setCustomerId(String customerId) {
        this.customerId = customerId;
    }

    public List<OrderItemDTO> getItems() {
        return items;
    }

    public void setItems(List<OrderItemDTO> items) {
        this.items = items;
    }

    public BigDecimal getDiscountRate() {
        return discountRate;
    }

    public void setDiscountRate(BigDecimal discountRate) {
        this.discountRate = discountRate;
    }

    public String getRemark() {
        return remark;
    }

    public void setRemark(String remark) {
        this.remark = remark;
    }

    public String getPaymentMethod() {
        return paymentMethod;
    }

    public void setPaymentMethod(String paymentMethod) {
        this.paymentMethod = paymentMethod;
    }

    /**
     * 订单明细项DTO
     */
    public static class OrderItemDTO {
        /**
         * 商品ID
         */
        @NotBlank(message = "商品ID不能为空")
        private String productId;

        /**
         * 数量
         */
        @NotNull(message = "数量不能为空")
        private Integer quantity;

        /**
         * 销售单价(用户可自定义)
         */
        private BigDecimal price;

        // Getters and Setters
        public String getProductId() {
            return productId;
        }

        public void setProductId(String productId) {
            this.productId = productId;
        }

        public Integer getQuantity() {
            return quantity;
        }

        public void setQuantity(Integer quantity) {
            this.quantity = quantity;
        }

        public BigDecimal getPrice() {
            return price;
        }

        public void setPrice(BigDecimal price) {
            this.price = price;
        }
    }
}