{# 映射器模板 #}
{% if part == 'header' %}
#pragma once

#include "deserializer.h"
#include "serializer.h"

/**
 * 消息映射器
 * 将{{ source_message.full_name }}映射到{{ target_message.full_name }}
 */
class MessageMapper {
public:
    MessageMapper();

    // 执行映射
    {{ target_message.system_name }}{{ target_message.message_type }} map(
        const {{ source_message.system_name }}{{ source_message.message_type }}& source);

private:
    // 各个字段的映射函数
    {% for edge in mapping_path %}
    void map_{{ edge.mapping.source_field.name }}_to_{{ edge.mapping.target_field.name }}(
        const {{ source_message.system_name }}{{ source_message.message_type }}& source,
        {{ target_message.system_name }}{{ target_message.message_type }}& target);
    {% endfor %}
};

{% else %}
#include "mapper.h"
#include <cmath>
#include <algorithm>

MessageMapper::MessageMapper() {
}

{{ target_message.system_name }}{{ target_message.message_type }}
MessageMapper::map(const {{ source_message.system_name }}{{ source_message.message_type }}& source) {
    {{ target_message.system_name }}{{ target_message.message_type }} target;

    {% for edge in mapping_path %}
    // 映射: {{ edge.mapping.source_field.full_name }} -> {{ edge.mapping.target_field.full_name }}
    map_{{ edge.mapping.source_field.name }}_to_{{ edge.mapping.target_field.name }}(source, target);
    {% endfor %}

    return target;
}

{% for edge in mapping_path %}
void MessageMapper::map_{{ edge.mapping.source_field.name }}_to_{{ edge.mapping.target_field.name }}(
    const {{ source_message.system_name }}{{ source_message.message_type }}& source,
    {{ target_message.system_name }}{{ target_message.message_type }}& target) {

    {% if edge.mapping.operator.value == 'DIRECT' %}
    // 直接赋值
    target.{{ edge.mapping.target_field.name }} = source.{{ edge.mapping.source_field.name }};

    {% elif edge.mapping.operator.value == 'ADD' %}
    // 加法运算
    target.{{ edge.mapping.target_field.name }} = source.{{ edge.mapping.source_field.name }} + {{ edge.mapping.operand }};

    {% elif edge.mapping.operator.value == 'MULTIPLY' %}
    // 乘法运算
    target.{{ edge.mapping.target_field.name }} = source.{{ edge.mapping.source_field.name }} * {{ edge.mapping.operand }};

    {% else %}
    // 默认直接赋值
    target.{{ edge.mapping.target_field.name }} = source.{{ edge.mapping.source_field.name }};
    {% endif %}
}

{% endfor %}
{% endif %}