package com.tzld.piaoquan.longarticle.utils;

import com.alibaba.fastjson.JSONObject;
import com.google.common.reflect.TypeToken;
import com.google.gson.GsonBuilder;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

@Slf4j
public class JSONUtils {


    public static String toJsonNew(Object obj) {
        if (obj == null) {
            return "";
        }
        try {
            return JSONObject.toJSONString(obj);
        } catch (Exception e) {
            log.error("toJson exception", e);
            return "";
        }
    }

    public static String toJson(Object obj) {
        if (obj == null) {
            return "";
        }
        try {
            return new GsonBuilder().disableHtmlEscaping().create().toJson(obj);
        } catch (Exception e) {
            log.error("toJson exception", e);
            return "";
        }
    }

    public static <T> T fromJson(String value, TypeToken<T> typeToken, T defaultValue) {

        if (StringUtils.isBlank(value)) {
            return defaultValue;
        }
        try {
            return JSONObject.parseObject(value, typeToken.getType());
        } catch (Exception e) {
            log.error("parseObject error! value=[{}]", value, e);
        }
        return defaultValue;
    }

    /**
     * 解析AI返回的JSON内容，自动处理markdown代码块包裹的情况
     * AI返回的内容可能被 ```json ... ``` 包裹，导致直接解析失败
     */
    public static JSONObject parseAIJsonContent(String content) {
        if (StringUtils.isBlank(content)) {
            return null;
        }
        // 先直接尝试解析
        try {
            return JSONObject.parseObject(content);
        } catch (Exception e) {
            log.warn("JSON直接解析失败，尝试清理markdown格式后重试, content=[{}]", content);
        }
        // 清理markdown代码块标记后重试
        String cleaned = cleanMarkdownJsonBlock(content);
        try {
            return JSONObject.parseObject(cleaned);
        } catch (Exception e) {
            log.error("清理markdown格式后JSON解析仍然失败, cleaned=[{}]", cleaned, e);
            return null;
        }
    }

    /**
     * 清理markdown代码块标记，如 ```json ... ```
     */
    public static String cleanMarkdownJsonBlock(String content) {
        if (StringUtils.isBlank(content)) {
            return content;
        }
        String cleaned = content.trim();
        // 去除开头的 ```json 或 ```
        cleaned = cleaned.replaceAll("^```(?:json)?\\s*", "");
        // 去除结尾的 ```
        cleaned = cleaned.replaceAll("\\s*```$", "");
        return cleaned.trim();
    }

}