/**
 * 客户订单分析策略，分析每个客户的订单数量和消费总额
 */
package com.orderprocessing;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class CustomerOrderAnalysisStrategy implements OrderAnalysisStrategy {
    @Override
    public Map<String, Object> analyze(List<Order> orders) {
        Map<String, Object> results = new HashMap<>();
        Map<String, Integer> customerOrderCount = new HashMap<>();
        Map<String, Double> customerSpending = new HashMap<>();
        
        if (orders != null) {
            for (Order order : orders) {
                String customerName = order.getCustomerName();
                
                // 统计每个客户的订单数量
                customerOrderCount.put(customerName, 
                    customerOrderCount.getOrDefault(customerName, 0) + 1);
                
                // 统计每个客户的消费总额
                customerSpending.put(customerName, 
                    customerSpending.getOrDefault(customerName, 0.0) + order.getTotalAmount());
            }
        }
        
        results.put("customerOrderCount", customerOrderCount);
        results.put("customerSpending", customerSpending);
        results.put("uniqueCustomerCount", customerOrderCount.size());
        
        return results;
    }
    
    @Override
    public String getStrategyName() {
        return "客户订单分析";
    }
}