package com.wecom.robot.service;

import com.wecom.robot.config.TransferConfig;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Date;
import java.util.List;

@Slf4j
@Service
@RequiredArgsConstructor
public class TransferService {

    private final TransferConfig transferConfig;

    public boolean shouldTransferToManual(String message, double confidence, int messageCount, LocalDateTime sessionCreatedAt) {
        if (!transferConfig.isEnabled()) {
            log.info("转人工功能已关闭，不转人工");
            return false;
        }

        if (containsKeywords(message)) {
            log.info("触发转人工: 关键词匹配");
            return true;
        }

        /*if (confidence < transferConfig.getConfidenceThreshold()) {
            log.info("触发转人工: AI置信度过低 confidence={}", confidence);
            return true;
        }

        if (messageCount >= transferConfig.getMaxMessageRounds()) {
            log.info("触发转人工: 消息轮次过多 count={}", messageCount);
            return true;
        }

        if (sessionCreatedAt != null) {
            long duration = System.currentTimeMillis() - 
                    sessionCreatedAt.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
            if (duration >= transferConfig.getMaxSessionDuration()) {
                log.info("触发转人工: 会话时长超限 duration={}ms", duration);
                return true;
            }
        }*/

        return false;
    }

    public String getTransferReason(String message, double confidence, int messageCount) {
        List<String> keywords = transferConfig.getKeywords();
        if (keywords != null) {
            for (String keyword : keywords) {
                if (message != null && message.contains(keyword)) {
                    return "关键词触发: " + keyword;
                }
            }
        }

        if (confidence < transferConfig.getConfidenceThreshold()) {
            return "AI置信度过低: " + confidence;
        }

        if (messageCount >= transferConfig.getMaxMessageRounds()) {
            return "消息轮次过多: " + messageCount;
        }

        return "其他原因";
    }

    private boolean containsKeywords(String message) {
        if (message == null) {
            return false;
        }

        List<String> keywords = transferConfig.getKeywords();
        if (keywords == null) {
            return false;
        }

        for (String keyword : keywords) {
            if (message.contains(keyword)) {
                return true;
            }
        }

        return false;
    }
}