package design.persistence;
import java.io.File;
import java.io.IOException;
import design.model.DataHandler;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

import design.model.Golfer;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;



public class XMLHandler implements DataHandler 
{    
    private final ObjectMapper jsonMapper = new ObjectMapper();
    private final XmlMapper xmlMapper = new XmlMapper();

    public void exportPersonalData(File file) throws IOException {
        // get our json data
        File jsonData = JSONPersonalDatabase.instance().exportData(file);
        // read the top tree node (the array)
        JsonNode golfersNode = jsonMapper.readTree(jsonData);
        // map it to an object node
        ObjectNode root = xmlMapper.createObjectNode();
        root.set("golfer", golfersNode);
        xmlMapper.writerWithDefaultPrettyPrinter().writeValue(file, root);
    }

    public void importPersonalData(File file) throws IOException {

    JsonNode root = xmlMapper.readTree(file);
    JsonNode golfersNode = root.get("golfer");
    if (golfersNode == null) {
        throw new IOException("Expected 'golfer' element in XML root, but none found");
    }
    if (!golfersNode.isArray()) {
        golfersNode = xmlMapper.createArrayNode().add(golfersNode);
    }

    Golfer[] golfers = xmlMapper.treeToValue(golfersNode, Golfer[].class);

    File tempJson = File.createTempFile("imported", ".json");
    jsonMapper.writerWithDefaultPrettyPrinter().writeValue(tempJson, golfers);
    JSONPersonalDatabase.instance().importData(tempJson);
    tempJson.delete();
    }

    

    public void exportLeagueData(File file) throws IOException
    {
        // TO DO: exporting league data
    }

    public void importLeagueData(File file) throws IOException
    {
        // TO DO: importing league data
    }
}