/*
 *  Copyright (c) 2023-2026, Easy-Agents (fuhai999@gmail.com).
 *  <p>
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  <p>
 *  http://www.apache.org/licenses/LICENSE-2.0
 *  <p>
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.easyagents.core.message;

import java.util.HashMap;

public class SystemMessage extends AbstractTextMessage<SystemMessage> {

    public SystemMessage() {
    }

    public SystemMessage(String content) {
        this.content = content;
    }

    public static SystemMessage of(String content) {
        return new SystemMessage(content);
    }

    @Override
    public String toString() {
        return "SystemMessage{" +
            "content='" + content + '\'' +
            ", metadataMap=" + metadataMap +
            '}';
    }

    /**
     * 创建并返回当前对象的副本。
     *
     * @return 一个新的、内容相同但内存独立的对象
     */
    @Override
    public SystemMessage copy() {
        SystemMessage copy = new SystemMessage();
        copy.content = this.content;
        if (this.metadataMap != null) {
            copy.metadataMap = new HashMap<>(this.metadataMap);
        }
        return copy;
    }
}
