package com.docus.bgts.utils;


import com.alibaba.fastjson.JSON;
import com.docus.bgts.enums.Codes;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class XmlUtils {
    //定义解析器和文档对象
    private SAXReader saxReader;
    private Document document;

    public XmlUtils(String path) {
        //获取解析器
        saxReader = new SAXReader();
        try {
            //获取文档对象
            document = saxReader.read(path);
        } catch (DocumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public XmlUtils(InputStream path) {
        //获取解析器
        saxReader = new SAXReader();
        try {
            //获取文档对象
            document = saxReader.read(path);
        } catch (DocumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * 动态获取节点内容
     * @return
     */
    public String getElement(String name){
        //获取根节点
        Element root = document.getRootElement();
        Object directory = FileUtils.getJsonByName(Codes.DIRECTORY.getMessage());
        Element current=root;
        if(directory==null){
            throw new RuntimeException("没有定义目录结构");
        }
        List<String> directoryArr=(List<String>)directory;
        for (String dire : directoryArr) {
            current=current.element(dire);
        }
        return current.element(name)==null?"":current.element(name).getText();
    }

    /**
     * 根据路径动态获取节点
     * @return
     */
    public Element getElement(List<String> directory){
        //获取根节点
        Element root = document.getRootElement();

        Element current=root;
        List<String> directoryArr=directory;
        for (String dire : directoryArr) {
            current=current.element(dire);
        }
        if(current==null){
            throw new RuntimeException("未找到对应节点");
        }
        return current;
    }

    /**
     * 返回存在的根节点
     */
    public List<Element> getJsonByName(){
        //获取目录结构
        String path = FileUtils.currentPath();
        //解析json映射文件
        String json = JsonUtils.readJsonFile(path + Codes.JSON_ADDRESS.getMessage());
        Map jsonMap = JSON.parseObject(json, Map.class);
        //判断是否多条
        List<String> basicArr= (List<String>) jsonMap.get("doubleBasic");
        List<String> directory= (List<String>) jsonMap.get("basicDirectory");
        List<Element> elements=null;
        Element root=this.getElement(directory);
        for (String basic : basicArr) {
            elements=root.elements(basic);
            if(elements!=null&&elements.size()>0){
                break;
            }
        }
        if(elements==null||elements.size()==0){
            //只有一条
            List<String> rootDirectory= (List<String>) jsonMap.get("directory");
            root = this.getElement(rootDirectory);
            elements=new ArrayList<>();
            elements.add(root);
        }
        return elements;
    }

    /**
     * 根据节点名称获取内容
     *
     * @param name 节点名称
     * @return 节点内容
     */
    public String getElementText(String name) {
        //定位根节点
        Element root = document.getRootElement();
        //根据名称定位节点
        Element msg = root.element(Codes.MSG.getMessage());
        if(msg==null){
            throw new RuntimeException("没有"+Codes.MSG.getMessage()+"节点");
        }
//        Element patInfo = msg.element(Codes.PAT_INFO.getMessage());
//        if(patInfo==null){
//            throw new RuntimeException("没有"+Codes.PAT_INFO.getMessage()+"节点");
//        }
        Element element = msg.element(name);
        if(element==null){
            return null;
        }
        //返回节点内容
        return element.getText();
    }

}