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 just from the JSON database
        File jsonData = JSONPersonalDatabase.instance().exportData(file);

        // read the the data from the JSON, as a JsonNode.
        JsonNode golfersNode = jsonMapper.readTree(jsonData);

        // XML requires a parent node, we can't just throw the golfersnode into the xml or else it will only produce the first element
        ObjectNode root = xmlMapper.createObjectNode();
        root.set("golfer", golfersNode);
        
        //write to the xml file.
        xmlMapper.writerWithDefaultPrettyPrinter().writeValue(file, root);
    }

    public void importPersonalData(File file) throws IOException {
        
        // read our root, the object node
        JsonNode root = xmlMapper.readTree(file); 

        // debug print line
        System.out.println(root.toPrettyString());

        // !!! here is where it's failing...our root is not serializable to an array of golfers. !!!
        Golfer[] golfers = xmlMapper.treeToValue(root, Golfer[].class); 

        // from here out should be good
        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
    }
}