package com.gpl.rpg.atcontentstudio.model;

import com.gpl.rpg.atcontentstudio.ATContentStudio;
import com.gpl.rpg.atcontentstudio.Notification;
import com.gpl.rpg.atcontentstudio.io.JsonSerializable;
import com.gpl.rpg.atcontentstudio.io.SettingsSave;
import com.gpl.rpg.atcontentstudio.model.GameSource.Type;
import com.gpl.rpg.atcontentstudio.model.bookmarks.BookmarksRoot;
import com.gpl.rpg.atcontentstudio.model.gamedata.*;
import com.gpl.rpg.atcontentstudio.model.maps.TMXMap;
import com.gpl.rpg.atcontentstudio.model.maps.TMXMapSet;
import com.gpl.rpg.atcontentstudio.model.maps.Worldmap;
import com.gpl.rpg.atcontentstudio.model.maps.WorldmapSegment;
import com.gpl.rpg.atcontentstudio.model.sprites.Spritesheet;
import com.gpl.rpg.atcontentstudio.model.tools.writermode.WriterModeData;
import com.gpl.rpg.atcontentstudio.ui.DefaultIcons;
import com.gpl.rpg.atcontentstudio.ui.WorkerDialog;
import com.gpl.rpg.atcontentstudio.utils.FileUtils;
import org.w3c.dom.Comment;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import javax.swing.tree.TreeNode;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import java.awt.*;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.*;

public class Project implements ProjectTreeNode, Serializable, JsonSerializable {

    private static final long serialVersionUID = 4807454973303366758L;
    private static final String drawablePath = TMXMapSet.DEFAULT_REL_PATH_TO_DRAWABLE.replace("\\", "/");


    //Every instance field that is not transient will be saved in this file.
    public static final String SETTINGS_FILE = ".project";
    public static final String SETTINGS_FILE_JSON = ".project.json";

    public String name;

    public File baseFolder;
    public boolean open;

    public GameSource baseContent; //A.k.a library

    public transient GameSource alteredContent; //Copied from base content (does not overwrite yet)
    public transient GameSource createdContent; //Stand-alone.
    public transient BookmarksRoot bookmarks;


    public transient SavedSlotCollection v;

    public transient Workspace parent;

    public Properties knownSpritesheetsProperties;

    @Override
    public Map toMap() {
        Map map = new HashMap();
        map.put("name", name.toString());
        map.put("baseFolder", baseFolder.getPath());
        map.put("open", open);
        map.put("baseContent", baseContent.toMap());
        map.put("sourceSetToUse", sourceSetToUse.toString());
        return map;
    }

    @Override
    public void fromMap(Map map) {
        if(map==null)return;
        name = (String) map.get("name");
        baseFolder = new File((String) map.get("baseFolder"));
        open = (boolean) map.get("open");

        baseContent = new GameSource((Map) map.get("baseContent"), this);

        sourceSetToUse = Enum.valueOf(ResourceSet.class, (String)map.get("sourceSetToUse"));
    }

    public static enum ResourceSet {
        gameData,
        debugData,
        allFiles
    }

    public ResourceSet sourceSetToUse;

    public Project(Workspace w, File projectFile) {
        this.parent = w;
        loadSpritesheetProperties();
        Map json = FileUtils.mapFromJsonFile(projectFile);
        this.fromMap(json);

        initializeData();
        save();
    }
    public Project(Workspace w, String name, File source, ResourceSet sourceSet){
        this.parent = w;
        this.name = name;
        this.sourceSetToUse = sourceSet;

        //CREATE PROJECT
        baseFolder = new File(w.baseFolder, name + File.separator);
        try {
            baseFolder.mkdir();
        } catch (SecurityException e) {
            Notification.addError("Eror creating project root folder: " + e.getMessage());
            e.printStackTrace();
        }

        loadSpritesheetProperties();
        baseContent = new GameSource(source, this);
        open = true;
        initializeData();
        linkAll();
        save();
    }

    private void initializeData() {
        v = new SavedSlotCollection();

        alteredContent = new GameSource(this, Type.altered);
        createdContent = new GameSource(this, Type.created);
        bookmarks = new BookmarksRoot(this);


        v.add(createdContent);
        v.add(alteredContent);
//		v.add(referencedContent);
        v.add(baseContent);
        v.add(bookmarks);
    }


    @Override
    public TreeNode getChildAt(int childIndex) {
        return v.getNonEmptyElementAt(childIndex);
    }

    @Override
    public int getChildCount() {
        return v.getNonEmptySize();
    }

    @Override
    public TreeNode getParent() {
        return parent;
    }

    @Override
    public int getIndex(TreeNode node) {
        return v.getNonEmptyIndexOf((ProjectTreeNode) node);
    }

    @Override
    public boolean getAllowsChildren() {
        return open;
    }

    @Override
    public boolean isLeaf() {
        return !open;
    }

    @Override
    public Enumeration<ProjectTreeNode> children() {
        return v.getNonEmptyElements();
    }

    @Override
    public void childrenAdded(List<ProjectTreeNode> path) {
        path.add(0, this);
        parent.childrenAdded(path);
    }

    @Override
    public void childrenChanged(List<ProjectTreeNode> path) {
        path.add(0, this);
        parent.childrenChanged(path);
    }

    @Override
    public void childrenRemoved(List<ProjectTreeNode> path) {
        path.add(0, this);
        parent.childrenRemoved(path);
    }

    @Override
    public void notifyCreated() {
        childrenAdded(new ArrayList<ProjectTreeNode>());
        for (ProjectTreeNode node : v.getNonEmptyIterable()) {
            node.notifyCreated();
        }
    }

    @Override
    public String getDesc() {
        return (needsSaving() ? "*" : "") + name;
    }


    public void close() {
        this.open = false;
        childrenRemoved(new ArrayList<ProjectTreeNode>());
    }

    public void open() {
        open = true;
    }


    public static Project fromFolder(Workspace w, File projRoot) {
        Project p;

        File fJson = new File(projRoot, Project.SETTINGS_FILE_JSON);
        if (fJson.exists()) {
            p = new Project(w, fJson);
        } else {
            File f = new File(projRoot, Project.SETTINGS_FILE);
            if (!f.exists()) {
                Notification.addError("Unable to find " + SETTINGS_FILE + " for project " + projRoot.getName());
                return null;
            } else {
                p = (Project) SettingsSave.loadInstance(f, "Project");
                p.baseFolder = projRoot;
            }
            p.save();
        }
        p.refreshTransients(w);
        return p;
    }

    public void refreshTransients(Workspace w) {
        this.parent = w;

        projectElementListeners = new HashMap<Class<? extends GameDataElement>, List<ProjectElementListener>>();

        loadSpritesheetProperties();

        if (sourceSetToUse == null) {
            sourceSetToUse = ResourceSet.allFiles;
        }

//		long l = new Date().getTime();
        baseContent.refreshTransients(this);
//		l = new Date().getTime() - l;
//		System.out.println("All initialized in "+l+"ms.");
//		referencedContent.refreshTransients(this);
        alteredContent = new GameSource(this, GameSource.Type.altered);
        createdContent = new GameSource(this, GameSource.Type.created);
        bookmarks = new BookmarksRoot(this);

        v = new SavedSlotCollection();
        v.add(createdContent);
        v.add(alteredContent);
//		v.add(referencedContent);
        v.add(baseContent);
        v.add(bookmarks);


        linkAll();

    }

    private void loadSpritesheetProperties() {
        knownSpritesheetsProperties = new Properties();
        try {
            knownSpritesheetsProperties.load(Project.class.getResourceAsStream("/spritesheets.properties"));
        } catch (IOException e) {
            Notification.addWarn("Unable to load default spritesheets properties.");
            e.printStackTrace();
        }
    }

    public void linkAll() {
        for (ProjectTreeNode node : baseContent.gameData.v.getNonEmptyIterable()) {
            if (node instanceof GameDataCategory<?>) {
                for (GameDataElement e : ((GameDataCategory<?>) node).toList()) {
                    e.link();
                }
            }
        }
        for (ProjectTreeNode node : baseContent.gameMaps.tmxMaps) {
            ((TMXMap) node).link();
        }
        for (ProjectTreeNode node : alteredContent.gameData.v.getNonEmptyIterable()) {
            if (node instanceof GameDataCategory<?>) {
                for (GameDataElement e : ((GameDataCategory<?>) node).toList()) {
                    e.link();
                }
            }
        }
        for (ProjectTreeNode node : alteredContent.gameMaps.tmxMaps) {
            ((TMXMap) node).link();
        }
        for (ProjectTreeNode node : createdContent.gameData.v.getNonEmptyIterable()) {
            if (node instanceof GameDataCategory<?>) {
                for (GameDataElement e : ((GameDataCategory<?>) node).toList()) {
                    e.link();
                }
            }
        }
        for (ProjectTreeNode node : createdContent.gameMaps.tmxMaps) {
            ((TMXMap) node).link();
        }

        for (WorldmapSegment node : createdContent.worldmap) {
            node.link();
        }
        for (WorldmapSegment node : alteredContent.worldmap) {
            node.link();
        }
        for (WorldmapSegment node : baseContent.worldmap) {
            node.link();
        }
    }

    public void save() {
        FileUtils.writeStringToFile(FileUtils.toJsonString(toMap()),new File(baseFolder, Project.SETTINGS_FILE_JSON), "Project " + this.name);
    }


    public JSONElement getGameDataElement(Class<? extends JSONElement> gdeClass, String id) {
        if (gdeClass == ActorCondition.class) {
            return getActorCondition(id);
        }
        if (gdeClass == Dialogue.class) {
            return getDialogue(id);
        }
        if (gdeClass == Droplist.class) {
            return getDroplist(id);
        }
        if (gdeClass == ItemCategory.class) {
            return getItemCategory(id);
        }
        if (gdeClass == Item.class) {
            return getItem(id);
        }
        if (gdeClass == NPC.class) {
            return getNPC(id);
        }
        if (gdeClass == Quest.class) {
            return getQuest(id);
        }
        return null;
    }

    public int getNodeCount(Class<? extends GameDataElement> gdeClass) {
        if (gdeClass == ActorCondition.class) {
            return getActorConditionCount();
        }
        if (gdeClass == Dialogue.class) {
            return getDialogueCount();
        }
        if (gdeClass == Droplist.class) {
            return getDroplistCount();
        }
        if (gdeClass == ItemCategory.class) {
            return getItemCategoryCount();
        }
        if (gdeClass == Item.class) {
            return getItemCount();
        }
        if (gdeClass == NPC.class) {
            return getNPCCount();
        }
        if (gdeClass == Quest.class) {
            return getQuestCount();
        }
        return 0;
    }

    public int getNodeIndex(GameDataElement node) {
        Class<? extends GameDataElement> gdeClass = node.getClass();
        if (gdeClass == ActorCondition.class) {
            return getActorConditionIndex((ActorCondition) node);
        }
        if (gdeClass == Dialogue.class) {
            return getDialogueIndex((Dialogue) node);
        }
        if (gdeClass == Droplist.class) {
            return getDroplistIndex((Droplist) node);
        }
        if (gdeClass == ItemCategory.class) {
            return getItemCategoryIndex((ItemCategory) node);
        }
        if (gdeClass == Item.class) {
            return getItemIndex((Item) node);
        }
        if (gdeClass == NPC.class) {
            return getNPCIndex((NPC) node);
        }
        if (gdeClass == Quest.class) {
            return getQuestIndex((Quest) node);
        }
        return 0;
    }

    public ActorCondition getActorCondition(String id) {
        ActorCondition gde = createdContent.gameData.getActorCondition(id);
        if (gde == null) gde = alteredContent.gameData.getActorCondition(id);
        if (gde == null) gde = baseContent.gameData.getActorCondition(id);
        return gde;
    }

    public int getActorConditionCount() {
        return createdContent.gameData.actorConditions.size() + baseContent.gameData.actorConditions.size();
    }

    public ActorCondition getActorCondition(int index) {
        if (index < createdContent.gameData.actorConditions.size()) {
            return createdContent.gameData.actorConditions.get(index);
        } else if (index < getActorConditionCount()) {
            return getActorCondition(baseContent.gameData.actorConditions.get(index - createdContent.gameData.actorConditions.size()).id);
        }
        return null;
    }

    public int getActorConditionIndex(ActorCondition ac) {
        if (ac.getDataType() == GameSource.Type.created) {
            return createdContent.gameData.actorConditions.getIndex(ac);
        } else {
            return createdContent.gameData.actorConditions.size() + baseContent.gameData.actorConditions.indexOf(baseContent.gameData.getActorCondition(ac.id));
        }
    }


    public Dialogue getDialogue(String id) {
        Dialogue gde = createdContent.gameData.getDialogue(id);
        if (gde == null) gde = alteredContent.gameData.getDialogue(id);
        if (gde == null) gde = baseContent.gameData.getDialogue(id);
        return gde;
    }

    public int getDialogueCount() {
        return createdContent.gameData.dialogues.size() + baseContent.gameData.dialogues.size();
    }

    public Dialogue getDialogue(int index) {
        if (index < createdContent.gameData.dialogues.size()) {
            return createdContent.gameData.dialogues.get(index);
        } else if (index < getDialogueCount()) {
            return getDialogue(baseContent.gameData.dialogues.get(index - createdContent.gameData.dialogues.size()).id);
        }
        return null;
    }

    public int getDialogueIndex(Dialogue dialogue) {
        if (dialogue.getDataType() == GameSource.Type.created) {
            return createdContent.gameData.dialogues.getIndex(dialogue);
        } else {
            return createdContent.gameData.dialogues.size() + baseContent.gameData.dialogues.indexOf(baseContent.gameData.getDialogue(dialogue.id));
        }
    }


    public Droplist getDroplist(String id) {
        Droplist gde = createdContent.gameData.getDroplist(id);
        if (gde == null) gde = alteredContent.gameData.getDroplist(id);
        if (gde == null) gde = baseContent.gameData.getDroplist(id);
        return gde;
    }

    public int getDroplistCount() {
        return createdContent.gameData.droplists.size() + baseContent.gameData.droplists.size();
    }

    public Droplist getDroplist(int index) {
        if (index < createdContent.gameData.droplists.size()) {
            return createdContent.gameData.droplists.get(index);
        } else if (index < getDroplistCount()) {
            return getDroplist(baseContent.gameData.droplists.get(index - createdContent.gameData.droplists.size()).id);
        }
        return null;
    }

    public int getDroplistIndex(Droplist droplist) {
        if (droplist.getDataType() == GameSource.Type.created) {
            return createdContent.gameData.droplists.getIndex(droplist);
        } else {
            return createdContent.gameData.droplists.size() + baseContent.gameData.droplists.indexOf(baseContent.gameData.getDroplist(droplist.id));
        }
    }


    public Item getItem(String id) {
        Item gde = createdContent.gameData.getItem(id);
        if (gde == null) gde = alteredContent.gameData.getItem(id);
        if (gde == null) gde = baseContent.gameData.getItem(id);
        return gde;
    }

    public int getItemCount() {
        return createdContent.gameData.items.size() + baseContent.gameData.items.size();
    }

    public Item getItem(int index) {
        if (index < createdContent.gameData.items.size()) {
            return createdContent.gameData.items.get(index);
        } else if (index < getItemCount()) {
            return getItem(baseContent.gameData.items.get(index - createdContent.gameData.items.size()).id);
        }
        return null;
    }

    public int getItemCountIncludingAltered() {
        return createdContent.gameData.items.size() + alteredContent.gameData.items.size() + baseContent.gameData.items.size();
    }

    public Item getItemIncludingAltered(int index) {
        if (index < createdContent.gameData.items.size()) {
            return createdContent.gameData.items.get(index);
        } else if (index < createdContent.gameData.items.size() + alteredContent.gameData.items.size()) {
            return alteredContent.gameData.items.get(index - createdContent.gameData.items.size());
        } else if (index < getItemCountIncludingAltered()) {
            return baseContent.gameData.items.get(index - (createdContent.gameData.items.size() + alteredContent.gameData.items.size()));
        }
        return null;
    }

    public int getItemIndex(Item item) {
        if (item.getDataType() == GameSource.Type.created) {
            return createdContent.gameData.items.getIndex(item);
        } else {
            return createdContent.gameData.items.size() + baseContent.gameData.items.indexOf(baseContent.gameData.getItem(item.id));
        }
    }


    public ItemCategory getItemCategory(String id) {
        ItemCategory gde = createdContent.gameData.getItemCategory(id);
        if (gde == null) gde = alteredContent.gameData.getItemCategory(id);
        if (gde == null) gde = baseContent.gameData.getItemCategory(id);
        return gde;
    }

    public int getItemCategoryCount() {
        return createdContent.gameData.itemCategories.size() + baseContent.gameData.itemCategories.size();
    }

    public ItemCategory getItemCategory(int index) {
        if (index < createdContent.gameData.itemCategories.size()) {
            return createdContent.gameData.itemCategories.get(index);
        } else if (index < getItemCategoryCount()) {
            return getItemCategory(baseContent.gameData.itemCategories.get(index - createdContent.gameData.itemCategories.size()).id);
        }
        return null;
    }

    public int getItemCategoryIndex(ItemCategory iCat) {
        if (iCat.getDataType() == GameSource.Type.created) {
            return createdContent.gameData.itemCategories.getIndex(iCat);
        } else {
            return createdContent.gameData.itemCategories.size() + baseContent.gameData.itemCategories.indexOf(baseContent.gameData.getItemCategory(iCat.id));
        }
    }


    public NPC getNPC(String id) {
        NPC gde = createdContent.gameData.getNPC(id);
        if (gde == null) gde = alteredContent.gameData.getNPC(id);
        if (gde == null) gde = baseContent.gameData.getNPC(id);
        return gde;
    }

    public NPC getNPCIgnoreCase(String id) {
        NPC gde = createdContent.gameData.getNPCIgnoreCase(id);
        if (gde == null) gde = alteredContent.gameData.getNPCIgnoreCase(id);
        if (gde == null) gde = baseContent.gameData.getNPCIgnoreCase(id);
        return gde;
    }

    public int getNPCCount() {
        return createdContent.gameData.npcs.size() + baseContent.gameData.npcs.size();
    }

    public NPC getNPC(int index) {
        if (index < createdContent.gameData.npcs.size()) {
            return createdContent.gameData.npcs.get(index);
        } else if (index < getNPCCount()) {
            return getNPC(baseContent.gameData.npcs.get(index - createdContent.gameData.npcs.size()).id);
        }
        return null;
    }

    public int getNPCCountIncludingAltered() {
        return createdContent.gameData.npcs.size() + alteredContent.gameData.npcs.size() + baseContent.gameData.npcs.size();
    }

    public NPC getNPCIncludingAltered(int index) {
        if (index < createdContent.gameData.npcs.size()) {
            return createdContent.gameData.npcs.get(index);
        } else if (index < createdContent.gameData.npcs.size() + alteredContent.gameData.npcs.size()) {
            return alteredContent.gameData.npcs.get(index - createdContent.gameData.npcs.size());
        } else if (index < getNPCCountIncludingAltered()) {
            return baseContent.gameData.npcs.get(index - (createdContent.gameData.npcs.size() + alteredContent.gameData.npcs.size()));
        }
        return null;
    }

    public int getNPCIndex(NPC npc) {
        if (npc.getDataType() == GameSource.Type.created) {
            return createdContent.gameData.npcs.getIndex(npc);
        } else {
            return createdContent.gameData.npcs.size() + baseContent.gameData.npcs.indexOf(baseContent.gameData.getNPC(npc.id));
        }
    }


    public Quest getQuest(String id) {
        Quest gde = createdContent.gameData.getQuest(id);
        if (gde == null) gde = alteredContent.gameData.getQuest(id);
        if (gde == null) gde = baseContent.gameData.getQuest(id);
        return gde;
    }

    public int getQuestCount() {
        return createdContent.gameData.quests.size() + baseContent.gameData.quests.size();
    }

    public Quest getQuest(int index) {
        if (index < createdContent.gameData.quests.size()) {
            return createdContent.gameData.quests.get(index);
        } else if (index < getQuestCount()) {
            return getQuest(baseContent.gameData.quests.get(index - createdContent.gameData.quests.size()).id);
        }
        return null;
    }

    public int getQuestIndex(Quest quest) {
        if (quest.getDataType() == GameSource.Type.created) {
            return createdContent.gameData.quests.getIndex(quest);
        } else {
            return createdContent.gameData.quests.size() + baseContent.gameData.quests.indexOf(baseContent.gameData.getQuest(quest.id));
        }
    }

    public WorldmapSegment getWorldmapSegment(String id) {
        WorldmapSegment gde = createdContent.getWorldmapSegment(id);
        if (gde == null) gde = alteredContent.getWorldmapSegment(id);
        if (gde == null) gde = baseContent.getWorldmapSegment(id);
        return gde;
    }

    public int getWorldmapSegmentCount() {
        return createdContent.worldmap.size() + baseContent.worldmap.size();
    }

    public WorldmapSegment getWorldmapSegment(int index) {
        if (index < createdContent.worldmap.size()) {
            return createdContent.worldmap.get(index);
        } else if (index < getWorldmapSegmentCount()) {
            return getWorldmapSegment(baseContent.worldmap.get(index - createdContent.worldmap.size()).id);
        }
        return null;
    }

    public int getWorldmapSegmentIndex(WorldmapSegment segment) {
        if (segment.getDataType() == GameSource.Type.created) {
            return createdContent.worldmap.getIndex(segment);
        } else {
            return createdContent.worldmap.size() + baseContent.worldmap.indexOf(baseContent.getWorldmapSegment(segment.id));
        }
    }

    public Image getIcon(String iconId) {
        return baseContent.getIcon(iconId);
    }

    public Image getImage(String iconId) {
        return baseContent.getImage(iconId);
    }

    public Spritesheet getSpritesheet(String id) {
        Spritesheet sheet = createdContent.gameSprites.getSpritesheet(id);
        if (sheet == null) sheet = alteredContent.gameSprites.getSpritesheet(id);
        if (sheet == null) sheet = baseContent.gameSprites.getSpritesheet(id);
        return sheet;
    }

    public int getSpritesheetCount() {
        return createdContent.gameSprites.spritesheets.size() + baseContent.gameSprites.spritesheets.size();
    }

    public Spritesheet getSpritesheet(int index) {
        if (index < createdContent.gameSprites.spritesheets.size()) {
            return createdContent.gameSprites.spritesheets.get(index);
        } else if (index < getSpritesheetCount()) {
            return getSpritesheet(baseContent.gameSprites.spritesheets.get(index - createdContent.gameSprites.spritesheets.size()).id);
        }
        return null;
    }

    public int getSpritesheetIndex(Spritesheet spritesheet) {
        if (spritesheet.getDataType() == GameSource.Type.created) {
            return createdContent.gameSprites.spritesheets.indexOf(spritesheet);
        } else {
            return createdContent.gameSprites.spritesheets.size() + baseContent.gameSprites.spritesheets.indexOf(baseContent.gameSprites.getSpritesheet(spritesheet.id));
        }
    }

    public TMXMap getMap(String id) {
        TMXMap map = createdContent.gameMaps.getMap(id);
        if (map == null) map = alteredContent.gameMaps.getMap(id);
        if (map == null) map = baseContent.gameMaps.getMap(id);
        return map;
    }

    public int getMapCount() {
        return createdContent.gameMaps.getChildCount() + baseContent.gameMaps.getChildCount();
    }

    public TMXMap getMap(int index) {
        if (index < createdContent.gameMaps.getChildCount()) {
            return createdContent.gameMaps.get(index);
        } else if (index < getMapCount()) {
            return getMap(baseContent.gameMaps.get(index - createdContent.gameMaps.getChildCount()).id);
        }
        return null;
    }

    public int getMapIndex(TMXMap map) {
        if (map.getDataType() == GameSource.Type.created) {
            return createdContent.gameMaps.tmxMaps.indexOf(map);
        } else {
            return createdContent.gameMaps.tmxMaps.size() + baseContent.gameMaps.tmxMaps.indexOf(baseContent.gameMaps.getMap(map.id));
        }
    }

    public int getWriterSketchCount() {
        return createdContent.writerModeDataSet.getChildCount();
    }

    public WriterModeData getWriterSketch(String id) {
        return createdContent.writerModeDataSet.getWriterSketch(id);
    }

    public WriterModeData getWriterSketch(int index) {
        if (index < createdContent.writerModeDataSet.getChildCount()) {
            return createdContent.writerModeDataSet.get(index);
        }
        return null;
    }

    @Override
    public Project getProject() {
        return this;
    }

    @Override
    public Image getIcon() {
        return getOpenIcon();
    }

    @Override
    public Image getClosedIcon() {
        //TODO Create a cool Project icon.
        return DefaultIcons.getStdClosedIcon();
    }

    @Override
    public Image getLeafIcon() {
        //TODO Create a cool Project icon.
        return DefaultIcons.getStdClosedIcon();
    }

    @Override
    public Image getOpenIcon() {
        //TODO Create a cool Project icon.
        return DefaultIcons.getStdOpenIcon();
    }

    public void makeWritable(JSONElement node) {
        GameSource.Type type = node.getDataType();
        if (type == null) {
            Notification.addError("Unable to make " + node.getDesc() + " writable. No owning GameDataSet found.");
        } else {
            if (type == GameSource.Type.source) {
                JSONElement clone = (JSONElement) node.clone();
                if (node instanceof Quest) {
                    for (QuestStage oldStage : ((Quest) node).stages) {
                        QuestStage newStage = ((Quest) clone).getStage(oldStage.progress);
                        for (GameDataElement backlink : oldStage.getBacklinks()) {
                            backlink.elementChanged(oldStage, newStage);
                        }
                        oldStage.getBacklinks().clear();
                    }
                }
                for (GameDataElement backlink : node.getBacklinks()) {
                    backlink.elementChanged(node, clone);
                }
                node.getBacklinks().clear();
                clone.writable = true;
                clone.state = GameDataElement.State.created;
                alteredContent.gameData.addElement(clone);
            } else {
                Notification.addError("Unable to make " + node.getDesc() + " writable. It does not originate from game source material.");
            }
        }
    }


    public void makeWritable(TMXMap node) {
        GameSource.Type type = node.getDataType();
        if (type == null) {
            Notification.addError("Unable to make " + node.getDesc() + " writable. No owning GameDataSet found.");
        } else {
            if (type == GameSource.Type.source) {
                TMXMap clone = node.clone();
                for (GameDataElement backlink : node.getBacklinks()) {
                    backlink.elementChanged(node, clone);
                }
                node.getBacklinks().clear();
                clone.writable = true;
                clone.state = GameDataElement.State.created;
                alteredContent.gameMaps.addMap(clone);
            } else {
                Notification.addError("Unable to make " + node.getDesc() + " writable. It does not originate from game source material.");
            }
        }
    }

    public void makeWritable(WorldmapSegment node) {
        GameSource.Type type = node.getDataType();
        if (type == null) {
            Notification.addError("Unable to make " + node.getDesc() + " writable. No owning GameDataSet found.");
        } else {
            if (type == GameSource.Type.source) {
                WorldmapSegment clone = node.clone();
                for (GameDataElement backlink : node.getBacklinks()) {
                    backlink.elementChanged(node, clone);
                }
                clone.state = GameDataElement.State.init;
                clone.parse();
                node.getBacklinks().clear();
                clone.writable = true;
                clone.state = GameDataElement.State.created;
                alteredContent.worldmap.addSegment(clone);
            } else {
                Notification.addError("Unable to make " + node.getDesc() + " writable. It does not originate from game source material.");
            }
        }
    }

    /**
     * @param node. Before calling this method, make sure that no other node with the same class and id exist in either created or altered.
     */
    public void createElement(JSONElement node) {
        node.writable = true;
        if (getGameDataElement(node.getClass(), node.id) != null) {
            GameDataElement existingNode = getGameDataElement(node.getClass(), node.id);
            for (GameDataElement backlink : existingNode.getBacklinks()) {
                backlink.elementChanged(existingNode, node);
            }
            existingNode.getBacklinks().clear();
            node.writable = true;
            alteredContent.gameData.addElement(node);
            node.link();
            node.state = GameDataElement.State.created;
        } else {
            createdContent.gameData.addElement(node);
            node.link();
            node.state = GameDataElement.State.created;
        }
        fireElementAdded(node, getNodeIndex(node));
    }

    /**
     * @param node. Before calling this method, make sure that no other node with the same class and id exist in either created or altered.
     */
    public void createElements(List<? extends JSONElement> nodes) {
        for (JSONElement node : nodes) {
            //Already added.
            if (node.getProject() != null) continue;
            node.writable = true;
            if (getGameDataElement(node.getClass(), node.id) != null) {
                GameDataElement existingNode = getGameDataElement(node.getClass(), node.id);
                for (GameDataElement backlink : existingNode.getBacklinks()) {
                    backlink.elementChanged(existingNode, node);
                }
                existingNode.getBacklinks().clear();
                node.writable = true;
                alteredContent.gameData.addElement(node);
            } else {
                createdContent.gameData.addElement(node);
            }
        }
        for (JSONElement node : nodes) {
            node.link();
            node.state = GameDataElement.State.created;
            fireElementAdded(node, getNodeIndex(node));
        }
    }

    /**
     * @param node. Before calling this method, make sure that no other map with the same id exist in either created or altered.
     */
    public void createElement(TMXMap node) {
        node.writable = true;
        if (getMap(node.id) != null) {
            GameDataElement existingNode = getMap(node.id);
            for (GameDataElement backlink : existingNode.getBacklinks()) {
                backlink.elementChanged(existingNode, node);
            }
            existingNode.getBacklinks().clear();
            node.writable = true;
            node.tmxFile = new File(alteredContent.baseFolder, node.tmxFile.getName());
            node.parent = alteredContent.gameMaps;
            alteredContent.gameMaps.addMap(node);
            node.link();
            node.state = GameDataElement.State.created;
        } else {
            node.tmxFile = new File(createdContent.baseFolder, node.tmxFile.getName());
            node.parent = createdContent.gameMaps;
            createdContent.gameMaps.addMap(node);
            node.link();
            node.state = GameDataElement.State.created;
        }
        fireElementAdded(node, getNodeIndex(node));
    }


    public void moveToCreated(JSONElement target) {
        target.childrenRemoved(new ArrayList<ProjectTreeNode>());
        ((GameDataCategory<?>) target.getParent()).removeGeneric(target);
        target.state = GameDataElement.State.created;
        createdContent.gameData.addElement(target);
    }

    public void moveToAltered(JSONElement target) {
        target.childrenRemoved(new ArrayList<ProjectTreeNode>());
        ((GameDataCategory<?>) target.getParent()).removeGeneric(target);
        target.state = GameDataElement.State.created;
        ((JSONElement) target).jsonFile = new File(baseContent.gameData.getGameDataElement(((JSONElement) target).getClass(), target.id).jsonFile.getAbsolutePath());
        alteredContent.gameData.addElement((JSONElement) target);
    }

    public void createWorldmapSegment(WorldmapSegment node) {
        node.writable = true;
        if (getWorldmapSegment(node.id) != null) {
            WorldmapSegment existingNode = getWorldmapSegment(node.id);
            for (GameDataElement backlink : existingNode.getBacklinks()) {
                backlink.elementChanged(existingNode, node);
            }
            existingNode.getBacklinks().clear();
            node.writable = true;
            node.state = GameDataElement.State.created;
            alteredContent.worldmap.addSegment(node);
            node.link();
        } else {
            createdContent.worldmap.addSegment(node);
            node.state = GameDataElement.State.created;
            node.link();
        }
        fireElementAdded(node, getNodeIndex(node));
    }


    public void createWriterSketch(WriterModeData node) {
        node.writable = true;
        createdContent.writerModeDataSet.add(node);
        node.link();
        fireElementAdded(node, getNodeIndex(node));
    }

    public void bookmark(GameDataElement gde) {
        bookmarks.addBookmark(gde);
    }


    @Override
    public GameDataSet getDataSet() {
        return null;
    }

    @Override
    public Type getDataType() {
        return null;
    }


    public String getSpritesheetsProperty(String string) {
        return knownSpritesheetsProperties.getProperty(string);
    }

    public void setSpritesheetsProperty(String key, String value) {
        knownSpritesheetsProperties.setProperty(key, value);
    }


    @Override
    public boolean isEmpty() {
        return v.isEmpty();
    }


    public List<NPC> getSpawnGroup(String spawngroup_id) {
        List<NPC> result = new ArrayList<NPC>();
        int i = getNPCCount();
        boolean alreadyAdded = false;
        int index = -1;
        while (--i >= 0) {
            NPC npc = getNPC(i);
            if (spawngroup_id.equalsIgnoreCase(npc.spawngroup_id)) {
                for (NPC present : result) {
                    if (present.id.equals(npc.id)) {
                        alreadyAdded = true;
                        index = result.indexOf(present);
                        break;
                    }
                }
                if (alreadyAdded) {
                    result.set(index, npc);
                } else {
                    result.add(npc);
                }
            }
            alreadyAdded = false;
        }
        if (result.isEmpty()) {
            //Fallback case. A single NPC does not declare a spawn group, but is referred by its ID in maps' spawn areas.
            NPC npc = getNPCIgnoreCase(spawngroup_id);
            if (npc != null) result.add(npc);
        }
        return result;
    }

    transient Map<Class<? extends GameDataElement>, List<ProjectElementListener>> projectElementListeners = new HashMap<Class<? extends GameDataElement>, List<ProjectElementListener>>();

    public void addElementListener(Class<? extends GameDataElement> interestingType, ProjectElementListener listener) {
        if (projectElementListeners.get(interestingType) == null) {
            projectElementListeners.put(interestingType, new ArrayList<ProjectElementListener>());
        }
        projectElementListeners.get(interestingType).add(listener);
    }

    public void removeElementListener(Class<? extends GameDataElement> interestingType, ProjectElementListener listener) {
        if (projectElementListeners.get(interestingType) != null)
            projectElementListeners.get(interestingType).remove(listener);
    }

    public void fireElementAdded(GameDataElement element, int index) {
        if (projectElementListeners.get(element.getClass()) != null) {
            for (ProjectElementListener l : projectElementListeners.get(element.getClass())) {
                l.elementAdded(element, index);
            }
        }
    }

    public void fireElementRemoved(GameDataElement element, int index) {
        if (projectElementListeners.get(element.getClass()) != null) {
            for (ProjectElementListener l : projectElementListeners.get(element.getClass())) {
                l.elementRemoved(element, index);
            }
        }
    }

    public void exportProjectAsZipPackage(final File target) {
        WorkerDialog.showTaskMessage("Exporting project " + name + "...", ATContentStudio.frame, true, new Runnable() {
            @Override
            public void run() {
                Notification.addInfo("Exporting project \"" + name + "\" as " + target.getAbsolutePath());

                File tmpDir;
                try {
                    tmpDir = exportProjectToTmpDir();
                    FileUtils.writeToZip(tmpDir, target);
                    FileUtils.deleteDir(tmpDir);
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

                Notification.addSuccess("Project \"" + name + "\" exported as " + target.getAbsolutePath());
            }


        });
    }

    public void exportProjectOverGameSource(final File target) {
        WorkerDialog.showTaskMessage("Exporting project " + name + "...", ATContentStudio.frame, true, new Runnable() {
            @Override
            public void run() {
                Notification.addInfo("Exporting project \"" + name + "\" into " + target.getAbsolutePath());

                File tmpDir;
                try {
                    tmpDir = exportProjectToTmpDir();
                    FileUtils.copyOver(tmpDir, target);
                    FileUtils.deleteDir(tmpDir);
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

                Notification.addSuccess("Project \"" + name + "\" exported into " + target.getAbsolutePath());
            }


        });
    }

    public File exportProjectToTmpDir() throws IOException {
        File tmpDir = new File(baseFolder, "tmp");
        FileUtils.deleteDir(tmpDir);
        tmpDir.mkdir();
        File tmpJsonDataDir = new File(tmpDir, GameDataSet.DEFAULT_REL_PATH_IN_SOURCE);
        tmpJsonDataDir.mkdirs();

//		for (File createdJsonFile : createdContent.gameData.baseFolder.listFiles()) {
//			FileUtils.copyFile(createdJsonFile, new File(tmpJsonDataDir, createdJsonFile.getName()));
//		}
        Map<Class<? extends GameDataElement>, List<String>> writtenFilesPerDataType = new LinkedHashMap<Class<? extends GameDataElement>, List<String>>();
        List<String> writtenFiles;
        writtenFiles = writeDataDeltaForDataType(createdContent.gameData.actorConditions, alteredContent.gameData.actorConditions, baseContent.gameData.actorConditions, ActorCondition.class,
                                                 tmpJsonDataDir);
        writtenFilesPerDataType.put(ActorCondition.class, writtenFiles);
        writtenFiles = writeDataDeltaForDataType(createdContent.gameData.dialogues, alteredContent.gameData.dialogues, baseContent.gameData.dialogues, Dialogue.class, tmpJsonDataDir);
        writtenFilesPerDataType.put(Dialogue.class, writtenFiles);
        writtenFiles = writeDataDeltaForDataType(createdContent.gameData.droplists, alteredContent.gameData.droplists, baseContent.gameData.droplists, Droplist.class, tmpJsonDataDir);
        writtenFilesPerDataType.put(Droplist.class, writtenFiles);
        writtenFiles = writeDataDeltaForDataType(createdContent.gameData.itemCategories, alteredContent.gameData.itemCategories, baseContent.gameData.itemCategories, ItemCategory.class,
                                                 tmpJsonDataDir);
        writtenFilesPerDataType.put(ItemCategory.class, writtenFiles);
        writtenFiles = writeDataDeltaForDataType(createdContent.gameData.items, alteredContent.gameData.items, baseContent.gameData.items, Item.class, tmpJsonDataDir);
        writtenFilesPerDataType.put(Item.class, writtenFiles);
        writtenFiles = writeDataDeltaForDataType(createdContent.gameData.npcs, alteredContent.gameData.npcs, baseContent.gameData.npcs, NPC.class, tmpJsonDataDir);
        writtenFilesPerDataType.put(NPC.class, writtenFiles);
        writtenFiles = writeDataDeltaForDataType(createdContent.gameData.quests, alteredContent.gameData.quests, baseContent.gameData.quests, Quest.class, tmpJsonDataDir);
        writtenFilesPerDataType.put(Quest.class, writtenFiles);

        File tmpMapDir = new File(tmpDir, TMXMapSet.DEFAULT_REL_PATH_IN_SOURCE);
        tmpMapDir.mkdirs();
        writtenFiles = new LinkedList<String>();
        for (File createdMapFile : createdContent.gameMaps.mapFolder.listFiles()) {
            if (createdMapFile.getName().equalsIgnoreCase("worldmap.xml")) continue;
            copyTmxConverted(createdMapFile.toPath(), Paths.get(tmpMapDir.getAbsolutePath(), createdMapFile.getName()));
            writtenFiles.add(createdMapFile.getName());
        }
        for (File alteredMapFile : alteredContent.gameMaps.mapFolder.listFiles()) {
            if (alteredMapFile.getName().equalsIgnoreCase("worldmap.xml")) continue;
            copyTmxConverted(alteredMapFile.toPath(), Paths.get(tmpMapDir.getAbsolutePath(), alteredMapFile.getName()));
            writtenFiles.add(alteredMapFile.getName());
        }
        writtenFilesPerDataType.put(TMXMap.class, writtenFiles);

        if (sourceSetToUse == ResourceSet.gameData) {
            writeResourceListXml(writtenFilesPerDataType, GameSource.DEFAULT_REL_PATH_FOR_GAME_RESOURCE, baseContent.baseFolder, tmpDir);
        } else if (sourceSetToUse == ResourceSet.debugData) {
            writeResourceListXml(writtenFilesPerDataType, GameSource.DEFAULT_REL_PATH_FOR_DEBUG_RESOURCE, baseContent.baseFolder, tmpDir);
        }


        if (!createdContent.worldmap.isEmpty() || !alteredContent.worldmap.isEmpty()) {
            try {
                Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
                doc.setXmlVersion("1.0");
                Element root = doc.createElement("worldmap");
                doc.appendChild(root);

                for (int i = 0; i < getWorldmapSegmentCount(); i++) {
                    root.appendChild(getWorldmapSegment(i).toXmlElement(doc));
                }

                Worldmap.saveDocToFile(doc, new File(tmpMapDir, "worldmap.xml"));
            } catch (ParserConfigurationException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        return tmpDir;
    }

    private void copyTmxConverted(Path from, Path to) throws IOException {
        String xml = new String(Files.readAllBytes(from), StandardCharsets.UTF_8);
        xml = xml.replace("../../altered/spritesheets/", drawablePath);
        xml = xml.replace("../../created/spritesheets/", drawablePath);
        xml = xml.replace("../spritesheets/", drawablePath);
        xml = xml.replace("../spritesheets/", drawablePath);
        Files.write(to, xml.getBytes(StandardCharsets.UTF_8));
    }


    @SuppressWarnings("rawtypes")
    public List<String> writeDataDeltaForDataType(GameDataCategory<? extends JSONElement> created, GameDataCategory<? extends JSONElement> altered, GameDataCategory<? extends JSONElement> source, Class<? extends JSONElement> gdeClass, File targetFolder) {
        List<String> filenamesToWrite = new LinkedList<String>();
        Map<String, List<Map>> dataToWritePerFilename = new LinkedHashMap<String, List<Map>>();
        for (JSONElement gde : altered.toList()) {
            if (!filenamesToWrite.contains(gde.jsonFile.getName())) {
                filenamesToWrite.add(gde.jsonFile.getName());
            }
        }
        for (JSONElement gde : created.toList()) {
            if (!filenamesToWrite.contains(gde.jsonFile.getName())) {
                filenamesToWrite.add(gde.jsonFile.getName());
            }
        }
        for (String fName : filenamesToWrite) {
            for (JSONElement gde : source.toList()) {
                if (gde.jsonFile.getName().equals(fName)) {
                    if (dataToWritePerFilename.get(fName) == null) {
                        dataToWritePerFilename.put(fName, new ArrayList<Map>());
                    }
                    //Automatically fetches altered element over source element.
                    dataToWritePerFilename.get(fName).add(getGameDataElement(gdeClass, gde.id).toJson());
                }
            }
            for (JSONElement gde : created.toList()) {
                if (gde.jsonFile.getName().equals(fName)) {
                    if (dataToWritePerFilename.get(fName) == null) {
                        dataToWritePerFilename.put(fName, new ArrayList<Map>());
                    }
                    //Add the created elements.
                    dataToWritePerFilename.get(fName).add(getGameDataElement(gdeClass, gde.id).toJson());
                }
            }
        }
        for (String fName : dataToWritePerFilename.keySet()) {
            File jsonFile = new File(targetFolder, fName);

            String textToWrite = FileUtils.toJsonString(dataToWritePerFilename.get(fName));
            FileUtils.writeStringToFile(textToWrite, jsonFile, "JSON file '"+jsonFile.getAbsolutePath()+"'", false);
        }
        return filenamesToWrite;
    }


    private void writeResourceListXml(Map<Class<? extends GameDataElement>, List<String>> writtenFilesPerDataType, String xmlFileRelPath, File baseFolder, File tmpDir) {
        File xmlFile = new File(baseFolder, xmlFileRelPath);
        File outputFile = new File(tmpDir, xmlFileRelPath);

        Map<String, Class<? extends GameDataElement>> classNamesByArrayNames = new HashMap<String, Class<? extends GameDataElement>>();
        classNamesByArrayNames.put("loadresource_itemcategories", ItemCategory.class);
        classNamesByArrayNames.put("loadresource_actorconditions", ActorCondition.class);
        classNamesByArrayNames.put("loadresource_items", Item.class);
        classNamesByArrayNames.put("loadresource_droplists", Droplist.class);
        classNamesByArrayNames.put("loadresource_quests", Quest.class);
        classNamesByArrayNames.put("loadresource_conversationlists", Dialogue.class);
        classNamesByArrayNames.put("loadresource_monsters", NPC.class);
        classNamesByArrayNames.put("loadresource_maps", TMXMap.class);

        String jsonResPrefix = "@raw/";
        String tmxResPrefix = "@xml/";
        String jsonFileSuffix = ".json";
        String tmxFileSuffix = ".tmx";

        if (!xmlFile.exists()) return;
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        Document doc;
        try {
            factory.setIgnoringElementContentWhitespace(true);
            factory.setExpandEntityReferences(false);
            DocumentBuilder builder = factory.newDocumentBuilder();

            InputSource insrc = new InputSource(new FileInputStream(xmlFile));
            insrc.setEncoding("UTF-8");
            doc = builder.parse(insrc);

            Element arrayNode;
            String name, resPrefix, fileSuffix, resName, resToFile, fileToRes;
            Class<? extends GameDataElement> clazz;
            List<String> writtenFiles;

            Element root = (Element) doc.getElementsByTagName("resources").item(0);
            if (root != null) {
                NodeList arraysList = root.getElementsByTagName("array");
                if (arraysList != null) {
                    for (int i = 0; i < arraysList.getLength(); i++) {
                        arrayNode = (Element) arraysList.item(i);
                        name = arrayNode.getAttribute("name");
                        clazz = classNamesByArrayNames.get(name);
                        if (clazz == null) continue;
                        writtenFiles = writtenFilesPerDataType.get(clazz);
                        if (writtenFiles == null) continue;
                        if (clazz == TMXMap.class) {
                            resPrefix = tmxResPrefix;
                            fileSuffix = tmxFileSuffix;
                        } else {
                            resPrefix = jsonResPrefix;
                            fileSuffix = jsonFileSuffix;
                        }
                        NodeList arrayItems = arrayNode.getElementsByTagName("item");
                        if (arrayItems != null) {
                            for (int j = 0; j < arrayItems.getLength(); j++) {
                                resName = ((Element) arrayItems.item(j)).getTextContent();
                                if (resName == null) continue;
                                resToFile = resName.replaceFirst("\\A" + resPrefix, "") + fileSuffix;
                                writtenFiles.remove(resToFile);
                            }
                        }
                        if (!writtenFiles.isEmpty()) {
                            Comment com = doc.createComment("Added by ATCS " + ATContentStudio.APP_VERSION + " for project " + getProject().name);
                            arrayNode.appendChild(com);
                            Collections.sort(writtenFiles);
                            for (String missingRes : writtenFiles) {
                                Element item = doc.createElement("item");
                                fileToRes = resPrefix + missingRes.replaceFirst(fileSuffix + "\\z", "");
                                item.setTextContent(fileToRes);
                                arrayNode.appendChild(item);
                            }
                        }
                    }
                }
            }

            Transformer transformer = TransformerFactory.newInstance().newTransformer();
            if (!outputFile.getParentFile().exists()) {
                outputFile.getParentFile().mkdirs();
            }
            StringWriter temp = new StringWriter();
            Result output = new StreamResult(temp);
            Source input = new DOMSource(doc);
            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
            transformer.setOutputProperty(OutputKeys.METHOD, "xml");
            transformer.transform(input, output);

            String tempString = temp.toString();
            doc = builder.parse(new ByteArrayInputStream(tempString.getBytes("UTF-8")));
            input = new DOMSource(doc);
            transformer = TransformerFactory.newInstance().newTransformer(new StreamSource(new StringReader(
                    "<?xml version=\"1.0\"?>\r\n" +
                            "<xsl:stylesheet version=\"1.0\"\r\n" +
                            "                xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\">\r\n" +
                            "  <xsl:strip-space elements=\"*\" />\r\n" +
                            "  <xsl:output method=\"xml\" indent=\"yes\" />\r\n" +
                            "\r\n" +
                            "  <xsl:template match=\"node() | @*\" name=\"identity\">\r\n" +
                            "    <xsl:copy>\r\n" +
                            "      <xsl:apply-templates select=\"node() | @*\" />\r\n" +
                            "    </xsl:copy>\r\n" +
                            "  </xsl:template>\r\n" +
                            "\r\n" +
                            "  <xsl:template match=\"array\">\r\n" +
                            "    <xsl:call-template name=\"identity\"/>\r\n" +
                            "    <xsl:text>&#xA;&#xA;&#x20;&#x20;&#x20;&#x20;</xsl:text>\r\n" +
                            "  </xsl:template>\r\n" +
                            "</xsl:stylesheet>")));
            output = new StreamResult(new FileOutputStream(outputFile));
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
            transformer.transform(input, output);


        } catch (SAXException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (TransformerException e) {
            e.printStackTrace();
        }
    }

    @Override
    public boolean needsSaving() {
        for (ProjectTreeNode node : v.getNonEmptyIterable()) {
            if (node.needsSaving()) return true;
        }
        return false;
    }


}