package cc.mrbird.febs.ai.service.impl;

import cc.mrbird.febs.ai.entity.AiProductRole;
import cc.mrbird.febs.ai.res.ai.AiResponse;
import cc.mrbird.febs.ai.service.AiProductRoleService;
import cc.mrbird.febs.ai.service.AiService;
import com.volcengine.ark.runtime.model.completion.chat.ChatCompletionChoice;
import com.volcengine.ark.runtime.model.completion.chat.ChatCompletionRequest;
import com.volcengine.ark.runtime.model.completion.chat.ChatMessage;
import com.volcengine.ark.runtime.model.completion.chat.ChatMessageRole;
import com.volcengine.ark.runtime.service.ArkService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import okhttp3.ConnectionPool;
import okhttp3.Dispatcher;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author Administrator
 */
@Slf4j
@Service
@RequiredArgsConstructor
public class AiServiceImpl implements AiService {

    private static final String CODE_SUCCESS = "200";
    private static final String CODE_NOT_FOUND = "201";
    private static final String CODE_ERROR = "500";

    private final AiProductRoleService aiProductRoleService;

    @Value("${ai.service.ak}")
    private String ak;

    @Value("${ai.service.sk}")
    private String sk;

    @Value("${ai.service.base-url}")
    private String baseUrl;

    private ArkService service;

    @PostConstruct
    public void init() {
        ConnectionPool connectionPool = new ConnectionPool(10, 30, TimeUnit.SECONDS);
        Dispatcher dispatcher = new Dispatcher();
        this.service = ArkService.builder()
                .dispatcher(dispatcher)
                .connectionPool(connectionPool)
                .baseUrl(baseUrl)
                .ak(ak)
                .sk(sk)
                .build();
    }

    @PreDestroy
    public void destroy() {
        if (service != null) {
            service.shutdownExecutor();
        }
    }

    @Override
    public AiResponse start(String productRoleId, String content) {
        if (!StringUtils.hasText(productRoleId)) {
            log.warn("productRoleId 不能为空");
            return buildErrorResponse(CODE_NOT_FOUND, "AI陪练不存在");
        }

        AiProductRole aiProductRole = aiProductRoleService.getById(productRoleId);
        if (aiProductRole == null) {
            log.warn("未找到对应的角色配置，productRoleId: {}", productRoleId);
            return buildErrorResponse(CODE_NOT_FOUND, "AI陪练不存在");
        }

        String promptTemplate = aiProductRole.getPromptTemplate();
        String linkId = aiProductRole.getLinkId();

        if (!StringUtils.hasText(promptTemplate) || !StringUtils.hasText(linkId)) {
            log.warn("角色配置不完整，promptTemplate 或 linkId 为空，productRoleId: {}", productRoleId);
            return buildErrorResponse(CODE_ERROR, "角色配置不完整");
        }

        return question(promptTemplate, linkId, content);
    }

    @Override
    public AiResponse question(String promptTemplate, String linkId, String content) {
        if (!StringUtils.hasText(promptTemplate) || !StringUtils.hasText(linkId) || !StringUtils.hasText(content)) {
            log.warn("请求参数不完整，promptTemplate: {}, linkId: {}, content: {}", promptTemplate, linkId, content);
            return buildErrorResponse(CODE_ERROR, "请求参数不完整");
        }

        final List<ChatMessage> messages = new ArrayList<>();
        final ChatMessage systemMessage = ChatMessage.builder().role(ChatMessageRole.SYSTEM).content(promptTemplate).build();
        final ChatMessage userMessage = ChatMessage.builder().role(ChatMessageRole.USER).content(content).build();
        messages.add(systemMessage);
        messages.add(userMessage);

        ChatCompletionRequest chatCompletionRequest = ChatCompletionRequest.builder()
                .model(linkId)
                .messages(messages)
                .temperature(1.0)
                .topP(0.7)
                .maxTokens(4096)
                .frequencyPenalty(0.0)
                .build();

        try {
            List<ChatCompletionChoice> choices = service.createChatCompletion(chatCompletionRequest).getChoices();
            String result = choices.stream()
                    .map(choice -> choice.getMessage().getContent())
                    .filter(contentObj -> contentObj != null)
                    .map(Object::toString)
                    .collect(Collectors.joining());

            return buildSuccessResponse(result);
        } catch (Exception e) {
            log.error("调用AI服务失败，modelId: {}, content: {}", linkId, content, e);
            return buildErrorResponse(CODE_ERROR, "AI服务调用失败");
        }
    }

    private AiResponse buildErrorResponse(String code, String description) {
        AiResponse response = new AiResponse();
        response.setCode(code);
        response.setDescription(description);
        return response;
    }

    private AiResponse buildSuccessResponse(String result) {
        AiResponse response = new AiResponse();
        response.setCode(CODE_SUCCESS);
        response.setDescription("成功");
        response.setResContext(result);
        return response;
    }
}