package com.fs.company.service.workflow.deepdialogue;

import java.util.regex.Pattern;

/**
 * General-knowledge questions unrelated to tenant products may be answered via web research.
 */
public final class GeneralKnowledgeDialoguePolicy {

    private static final Pattern PRODUCT_INTENT = Pattern.compile(
            "价格|多少钱|多少钸|怎么买|怎么卖|套餐|产品|商品|服务|课程|订单|下单|购买|优惠|折扣|"
                    + "你们的|咱们的|我们的|店里|公司的|咨询一下.*卖|怎么卖|怎么办|怎么开通");

    private static final Pattern GENERAL_KNOWLEDGE = Pattern.compile(
            "能否|能不能|可以吗|好吗|有用吗|有效吗|怎么样|是否|是不是|什么是|为什么|怎么回事|有什么好处|能治|能否治|对.*有用|对.*有好处");

    public static final String WEB_RESEARCH_MARKER = "网页摘要参考";

    /** Public health / general-knowledge answers (not tenant product KB). */
    public static final String GENERAL_KNOWLEDGE_MARKER = "【通识作答】";

    private GeneralKnowledgeDialoguePolicy() {
    }

    public static boolean isProductRelatedQuestion(String message) {
        return message != null && !message.isBlank() && PRODUCT_INTENT.matcher(message.trim()).find();
    }

    public static boolean isGeneralKnowledgeQuestion(String message) {
        if (message == null || message.isBlank()) {
            return false;
        }
        if (MedicalEfficacyDialoguePolicy.isMedicalEfficacyConsultation(message)) {
            return true;
        }
        if (isProductRelatedQuestion(message)) {
            return false;
        }
        return GENERAL_KNOWLEDGE.matcher(message.trim()).find();
    }

    /**
     * @return true when web snippets or public-knowledge context should supplement the answer
     */
    public static boolean shouldEnrichWithWebResearch(String message, String knowledgeContext) {
        if (message == null || message.isBlank()) {
            return false;
        }
        if (!isGeneralKnowledgeQuestion(message)) {
            return false;
        }
        if (knowledgeContext != null) {
            if (knowledgeContext.contains(WEB_RESEARCH_MARKER)
                    || knowledgeContext.contains(GENERAL_KNOWLEDGE_MARKER)) {
                return false;
            }
        }
        // 通识/公域问题且 KB 未命中时，允许走网页摘要补充回答
        return true;
    }

    public static boolean allowsPublicKnowledgeAnswer(String knowledgeContext) {
        if (knowledgeContext == null || knowledgeContext.isBlank()) {
            return false;
        }
        return knowledgeContext.contains(WEB_RESEARCH_MARKER)
                || knowledgeContext.contains(GENERAL_KNOWLEDGE_MARKER);
    }
}