/**
 * 订单处理器类，负责处理订单的主要逻辑
 */
package com.orderprocessing;

import com.orderprocessing.Logger;
import com.orderprocessing.OrderValidator;
import com.orderprocessing.OrderNotifier;
import com.orderprocessing.DiscountStrategy;

public class OrderProcessor {
    private OrderValidator validator;
    private OrderNotifier notifier;
    private Logger logger;
    private DiscountStrategy discountStrategy;
    
    /**
     * 构造方法，注入依赖
     * @param validator 订单验证器
     * @param notifier 订单通知器
     * @param logger 日志记录器
     */
    public OrderProcessor(OrderValidator validator, OrderNotifier notifier, Logger logger) {
        this.validator = validator;
        this.notifier = notifier;
        this.logger = logger;
    }
    
    /**
     * 设置折扣策略
     * @param discountStrategy 折扣策略
     */
    public void setDiscountStrategy(DiscountStrategy discountStrategy) {
        this.discountStrategy = discountStrategy;
    }
    
    /**
     * 验证订单
     * @param order 需要验证的订单
     * @return 如果验证通过返回true，否则返回false
     */
    public boolean validateOrder(Order order) {
        logger.log("开始验证订单: " + order.getOrderId());
        
        boolean isValid = validator.isValid(order);
        
        if (isValid) {
            order.setStatus(Order.OrderStatus.VALIDATED);
            logger.log("订单验证通过: " + order.getOrderId());
        } else {
            logger.log("订单验证失败: " + order.getOrderId());
            // 记录详细错误信息
            for (String error : validator.getValidationErrors(order)) {
                logger.log("验证错误: " + error);
            }
        }
        
        return isValid;
    }
    
    /**
     * 处理订单
     * @param order 需要处理的订单
     * @return 如果处理成功返回true，否则返回false
     */
    public boolean processOrder(Order order) {
        logger.log("开始处理订单: " + order.getOrderId());
        
        // 首先验证订单
        if (!validateOrder(order)) {
            return false;
        }
        
        // 应用折扣
        if (discountStrategy != null) {
            double discount = discountStrategy.calculateDiscount(order);
            order.applyDiscount(discount);
            logger.log("应用折扣: " + discount + " 到订单: " + order.getOrderId());
        }
        
        // 更新订单状态
        order.setStatus(Order.OrderStatus.PROCESSED);
        logger.log("订单处理完成: " + order.getOrderId() + ", 最终金额: " + order.getTotalAmount());
        
        // 发送通知
        notifier.notifyOrderProcessed(order);
        
        return true;
    }
}