package com.administrator.dao.xml;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.springframework.stereotype.Component;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import com.administrator.endpoint.model.AUserModel;
import com.entity.UserEntity;

@Component
public class AXMLUserEntityDao implements IXMLAUserEntityDao {

    static DocumentBuilderFactory dbFactory;
    static DocumentBuilder dBuilder;
    static Document doc;

    @Override
    public List<UserEntity> getAllUsers() {
        File xmlFile = new File(EnStrings.filePath.getText());
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder;
        List<UserEntity> empList = new ArrayList<UserEntity>();

        try {
            dBuilder = dbFactory.newDocumentBuilder();
            org.w3c.dom.Document doc = dBuilder.parse(xmlFile);
            doc.getDocumentElement().normalize();

            NodeList nodeList = doc.getElementsByTagName("UserEntity");

            for (int i = 0; i < nodeList.getLength(); i++) {
                empList.add(getEmployee(nodeList.item(i)));
            }

        } catch (SAXException | ParserConfigurationException | IOException e1) {
            e1.printStackTrace();
        }

        return empList;
    }

    private static UserEntity getEmployee(Node node) {
        UserEntity user = new UserEntity();

        if (node.getNodeType() == Node.ELEMENT_NODE) {
            Element element = (Element) node;
        //  user.setId(getTagValue("id", element));
            user.setUsername(getTagValue("username", element));
            user.setPassword(getTagValue("password", element));
            user.setEmail(getTagValue("email", element));
            //user.setPhone(getTagValue("phone", element));
            //user.setUserDate(Long.parseLong(getTagValue("userDate", element)));
        }
        return user;
    }

    private static String getTagValue(String i, Element element) {
        NodeList nodeList = element.getElementsByTagName(i).item(0).getChildNodes();
        Node node = (Node) nodeList.item(0);
        return node.getNodeValue();
    }

    @Override
    public void registerUser(AUserModel userModel) {
        try {
            DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            Document document = documentBuilder.parse(EnStrings.filePath.getText());
            Element root = document.getDocumentElement();

            Element newUser = document.createElement("UserEntity");
            String userID = getLastId() + "";
            Element id = document.createElement("id");
            id.appendChild(document.createTextNode(userID));
            newUser.appendChild(id);

            Element username = document.createElement("username");
            username.appendChild(document.createTextNode(userModel.getUsername()));
            newUser.appendChild(username);

            Element password = document.createElement("password");
            password.appendChild(document.createTextNode(userModel.getPassword()));
            newUser.appendChild(password);

            Element email = document.createElement("email");
            email.appendChild(document.createTextNode(userModel.getEmail()));
            newUser.appendChild(email);

            Element phone = document.createElement("phone");
            phone.appendChild(document.createTextNode(userModel.getPhone()));
            newUser.appendChild(phone);
            long date = System.currentTimeMillis();
            Element userDate = document.createElement("userDate");
            userDate.appendChild(document.createTextNode(date + ""));
            newUser.appendChild(userDate);

            root.appendChild(newUser);
            DOMSource source = new DOMSource(document);

            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            StreamResult result = new StreamResult(EnStrings.filePath.getText());
            transformer.transform(source, result);
            System.out.println(getLastId());
        } catch (org.xml.sax.SAXException saxe1) {
            saxe1.printStackTrace();
        } catch (ParserConfigurationException pce1) {
            pce1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        } catch (TransformerException te1) {
            te1.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private int getLastId() {
        List<UserEntity> userList = getAllUsers();
        int userId = 0;
        for (UserEntity user : userList) {
            //int id = Integer.parseInt(user.getId());
        //  if (id > userId) {
            //  userId = id;
            }
        //}
        return userId + 1;
    }

    @Override
    public void deleteUser(long userId) {
        NodeList nodeList = ParserXML.getNodeListByTag(EnStrings.filePath.getText(), "UserEntity");
        for (int i = 0; i < nodeList.getLength(); i++) {
            Element userEntity = (Element) nodeList.item(i);
            Element idElement = (Element) userEntity.getElementsByTagName("id").item(0);
            String id = idElement.getTextContent();
            String usId = userId + "";
            if (id.equals(usId)) {

                userEntity.getParentNode().removeChild(userEntity);
                ParserXML.updateXML(EnStrings.filePath.getText());
            }
        }
    }

    @Override
    public void updateUser(AUserModel userModel, Long userId) {
        NodeList nodeList = ParserXML.getNodeListByTag(EnStrings.filePath.getText(), "UserEntity");
        for (int i = 0; i < nodeList.getLength(); i++) {
            Element userEntity = (Element) nodeList.item(i);
            String userID = userId + "";
            userEntity.getParentNode().removeChild(userEntity);
            ParserXML.updateXML(EnStrings.filePath.getText());
        }
        try {
            DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            Document document = documentBuilder.parse(EnStrings.filePath.getText());
            Element root = document.getDocumentElement();

            Element newUser = document.createElement("UserEntity");
            String userID = userId + "";
            Element id = document.createElement("id");
            id.appendChild(document.createTextNode(userID));
            newUser.appendChild(id);

            Element username = document.createElement("username");
            username.appendChild(document.createTextNode(userModel.getUsername()));
            newUser.appendChild(username);

            Element password = document.createElement("password");
            password.appendChild(document.createTextNode(userModel.getPassword()));
            newUser.appendChild(password);

            Element email = document.createElement("email");
            email.appendChild(document.createTextNode(userModel.getEmail()));
            newUser.appendChild(email);

            Element phone = document.createElement("phone");
            phone.appendChild(document.createTextNode(userModel.getPhone()));
            newUser.appendChild(phone);
            long date = System.currentTimeMillis();
            Element userDate = document.createElement("userDate");
            userDate.appendChild(document.createTextNode(date + ""));
            newUser.appendChild(userDate);

            root.appendChild(newUser);
            DOMSource source = new DOMSource(document);

            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            StreamResult result = new StreamResult(EnStrings.filePath.getText());
            transformer.transform(source, result);
            System.out.println(getLastId());
        } catch (org.xml.sax.SAXException saxe1) {
            saxe1.printStackTrace();
        } catch (ParserConfigurationException pce1) {
            pce1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        } catch (TransformerException te1) {
            te1.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}