package com.ard.agent.service;

import com.alibaba.cloud.ai.graph.RunnableConfig;
import com.alibaba.cloud.ai.graph.agent.ReactAgent;
import com.alibaba.cloud.ai.graph.exception.GraphRunnerException;
import com.ard.common.security.utils.SecurityUtils;
import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.ai.chat.messages.AssistantMessage;
import org.springframework.ai.content.Content;
import org.springframework.stereotype.Service;
import reactor.core.publisher.Flux;

@Slf4j
@Service
public class AIChatService {

    @Resource(name = "unifiedAgent")
    private ReactAgent unifiedAgent;

    /**
     * 唯一流式聊天入口
     */
    public Flux<String> streamChat(String userMessage) {
        try {
            return unifiedAgent.streamMessages(userMessage, runnableConfig())
                    .filter(msg -> msg instanceof AssistantMessage)
                    .map(Content::getText)
                    .doOnError(error -> log.error("Agent执行出错: {}", error.getMessage()));
        } catch (GraphRunnerException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 唯一同步聊天入口
     */
    public String chat(String userMessage) throws GraphRunnerException {
        AssistantMessage response = unifiedAgent.call(userMessage, runnableConfig());
        return response.getText();
    }

    private RunnableConfig runnableConfig() {
        return RunnableConfig.builder()
                .threadId(currentThreadId())
                .build();
    }

    private String currentThreadId() {
        Long userId;
        try {
            userId = SecurityUtils.getUserId();
        } catch (Exception e) {
            userId = null;
        }
        return userId == null ? "anonymous" : userId.toString();
    }
}