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package org.anjocaido.groupmanager.dataholder;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.anjocaido.groupmanager.GroupManager;
import org.anjocaido.groupmanager.data.Group;
import org.anjocaido.groupmanager.data.User;
import org.anjocaido.groupmanager.events.GMGroupEvent;
import org.anjocaido.groupmanager.events.GMSystemEvent;
import org.anjocaido.groupmanager.events.GMUserEvent;
import org.anjocaido.groupmanager.events.GMUserEvent.Action;
import org.anjocaido.groupmanager.events.GroupManagerEventHandler;
import org.anjocaido.groupmanager.permissions.AnjoPermissionsHandler;
import org.bukkit.Server;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.PluginManager;
import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.SafeConstructor;
import org.yaml.snakeyaml.reader.UnicodeReader;

/**
 *
 * @author gabrielcouto
 */
public class WorldDataHolder {

    /**
     * World name
     */
    protected String name;
    /**
     * The actual groups holder
     */
    protected GroupsDataHolder groups = new GroupsDataHolder();
	/**
     * The actual users holder
     */
    protected UsersDataHolder users = new UsersDataHolder();    
    /**
     *
     */
    protected AnjoPermissionsHandler permissionsHandler;

    
	/**
     * Prevent direct instantiation
     * @param worldName
     */
    public WorldDataHolder(String worldName) {
        name = worldName;
    }

    /**
     * The main constructor for a new WorldDataHolder
     * @param worldName
     * @param groups
     * @param users
     */
    public WorldDataHolder(String worldName, GroupsDataHolder groups, UsersDataHolder users) {
        this.name = worldName;
        this.groups = groups;
        this.users = users;
        
        //this.defaultGroup = defaultGroup;
    }
    
    /**
     * update the dataSource to point to this object.
     * 
     * This should be called whenever a set of world data is fetched.
     */
    public void updateDataSource() {
    	this.groups.setDataSource(this);
    	this.users.setDataSource(this);
    }

    /**
     * Search for a user. If it doesn't exist, create a new one with
     * default group.
     *
     * @param userName the name of the user
     * @return class that manage that user permission
     */
    public User getUser(String userName) {
        if (getUsers().containsKey(userName.toLowerCase())) {
            return getUsers().get(userName.toLowerCase());
        }
        User newUser = createUser(userName);
        return newUser;
    }

    /**
     * Add a user to the list. If it already exists, overwrite the old.
     * @param theUser the user you want to add to the permission list
     */
    public void addUser(User theUser) {
        if (theUser.getDataSource() != this) {
            theUser = theUser.clone(this);
        }
        if (theUser == null) {
            return;
        }
        if ((theUser.getGroup() == null)) {
            theUser.setGroup(groups.getDefaultGroup());
        }
        removeUser(theUser.getName());
        getUsers().put(theUser.getName().toLowerCase(), theUser);
        setUsersChanged(true);
        if (GroupManager.isLoaded())
        	GroupManagerEventHandler.callEvent(theUser, Action.USER_ADDED);
    }

    /**
     * Removes the user from the list. (he might become a default user)
     * @param userName the username from the user to remove
     * @return true if it had something to remove
     */
    public boolean removeUser(String userName) {
        if (getUsers().containsKey(userName.toLowerCase())) {
        	getUsers().remove(userName.toLowerCase());
        	setUsersChanged(true);
            if (GroupManager.isLoaded())
            	GroupManagerEventHandler.callEvent(userName, GMUserEvent.Action.USER_REMOVED);
            return true;
        }
        return false;
    }

    /**
     *
     * @param userName
     * @return true if we have data for this player.
     */
    public boolean isUserDeclared(String userName) {
        return getUsers().containsKey(userName.toLowerCase());
    }

    /**
     * Change the default group of the file.
     * @param group the group you want make default.
     */
    public void setDefaultGroup(Group group) {
        if (!getGroups().containsKey(group.getName().toLowerCase()) || (group.getDataSource() != this)) {
            addGroup(group);
        }
        groups.setDefaultGroup(getGroup(group.getName()));
        setGroupsChanged(true);
        if (GroupManager.isLoaded())
        	GroupManagerEventHandler.callEvent(GMSystemEvent.Action.DEFAULT_GROUP_CHANGED);
    }

    /**
     * Returns the default group of the file
     * @return the default group
     */
    public Group getDefaultGroup() {
        return groups.getDefaultGroup();
    }

    /**
     * Returns a group of the given name
     * @param groupName the name of the group
     * @return a group if it is found. null if not found.
     */
    public Group getGroup(String groupName) {
    	if (groupName.toLowerCase().startsWith("g:"))
    		return GroupManager.getGlobalGroups().getGroup(groupName);
    	else
    		return getGroups().get(groupName.toLowerCase());
    }

    /**
     * Check if a group exists.
     * Its the same of getGroup, but check if it is null.
     * @param groupName the name of the group
     * @return true if exists. false if not.
     */
    public boolean groupExists(String groupName) {
    	if (groupName.toLowerCase().startsWith("g:"))
    		return GroupManager.getGlobalGroups().hasGroup(groupName);
    	else
    		return getGroups().containsKey(groupName.toLowerCase());
    }

    /**
     * Add a group to the list
     * @param groupToAdd
     */
    public void addGroup(Group groupToAdd) {
    	if (groupToAdd.getName().toLowerCase().startsWith("g:")) {
    		GroupManager.getGlobalGroups().addGroup(groupToAdd);
    		GroupManagerEventHandler.callEvent(groupToAdd, GMGroupEvent.Action.GROUP_ADDED);
        	return;
        }
    	
        if (groupToAdd.getDataSource() != this) {
            groupToAdd = groupToAdd.clone(this);
        }
        removeGroup(groupToAdd.getName());
        getGroups().put(groupToAdd.getName().toLowerCase(), groupToAdd);
        setGroupsChanged(true);
        if (GroupManager.isLoaded())
        	GroupManagerEventHandler.callEvent(groupToAdd, GMGroupEvent.Action.GROUP_ADDED);
    }

    /**
     * Remove the group from the list
     * @param groupName
     * @return true if had something to remove. false the group was default or non-existant
     */
    public boolean removeGroup(String groupName) {
    	if (groupName.toLowerCase().startsWith("g:")) {
        	return GroupManager.getGlobalGroups().removeGroup(groupName);
        }
    	
        if (getDefaultGroup() != null && groupName.equalsIgnoreCase(getDefaultGroup().getName())) {
            return false;
        }
        if (getGroups().containsKey(groupName.toLowerCase())) {
            getGroups().remove(groupName.toLowerCase());
            setGroupsChanged(true);
            if (GroupManager.isLoaded())
            	GroupManagerEventHandler.callEvent(groupName.toLowerCase(), GMGroupEvent.Action.GROUP_REMOVED);
            return true;
        }
        return false;

    }

    /**
     * Creates a new User with the given name
     * and adds it to this holder.
     * @param userName the username you want
     * @return null if user already exists. or new User
     */
    public User createUser(String userName) {
        if (getUsers().containsKey(userName.toLowerCase())) {
            return null;
        }
        User newUser = new User(this, userName);
        newUser.setGroup(groups.getDefaultGroup(), false);
        addUser(newUser);
        setUsersChanged(true);
        return newUser;
    }

    /**
     * Creates a new Group with the given name
     * and adds it to this holder
     * @param groupName the groupname you want
     * @return null if group already exists. or new Group
     */
    public Group createGroup(String groupName) {
    	if (groupName.toLowerCase().startsWith("g:")) {
        	Group newGroup = new Group(groupName);
        	return GroupManager.getGlobalGroups().newGroup(newGroup);
        }
    	
    	if (getGroups().containsKey(groupName.toLowerCase())) {
            return null;
        }
        
    	Group newGroup = new Group(this, groupName);
        addGroup(newGroup);
        setGroupsChanged(true);
        return newGroup;
    }

    /**
     *
     * @return a collection of the groups
     */
    public Collection<Group> getGroupList() {
        return getGroups().values();
    }

    /**
     *
     * @return a collection of the users
     */
    public Collection<User> getUserList() {
        return getUsers().values();
    }

    /**
     * reads the file again
     */
    public void reload() {
        try {
        	reloadGroups();
        	reloadUsers();
        } catch (Exception ex) {
            Logger.getLogger(WorldDataHolder.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
    
    /**
     * Refresh Group data from file
     */
    public void reloadGroups() {
    	GroupManager.setLoaded(false);
    	try {
    		// temporary holder in case the load fails.
    		WorldDataHolder ph = new WorldDataHolder(this.getName());

    		loadGroups(ph, getGroupsFile());
    		// transfer new data
    		resetGroups();
    		for (Group tempGroup : ph.getGroupList()) {
    			tempGroup.clone(this);
    		}
    		this.setDefaultGroup(getGroup(ph.getDefaultGroup().getName()));
    		this.removeGroupsChangedFlag();
    		this.setTimeStampGroups(getGroupsFile().lastModified());
    		
    		ph = null;
    	} catch (Exception ex) {
            Logger.getLogger(WorldDataHolder.class.getName()).log(Level.WARNING, null, ex);
        }
    	GroupManager.setLoaded(true);
    	GroupManagerEventHandler.callEvent(GMSystemEvent.Action.RELOADED);
    }
    
    /**
     * Refresh Users data from file
     */
    public void reloadUsers() {
    	GroupManager.setLoaded(false);
    	try {
    		// temporary holder in case the load fails.
    		WorldDataHolder ph = new WorldDataHolder(this.getName());
    		// copy groups for reference
    		for (Group tempGroup : this.getGroupList()) {
    			tempGroup.clone(ph);
    		}
    		// setup the default group before loading user data.
    		ph.setDefaultGroup(ph.getGroup(getDefaultGroup().getName()));
    		loadUsers(ph, getUsersFile());
    		// transfer new data
    		resetUsers();
    		for (User tempUser : ph.getUserList()) {
    			tempUser.clone(this);
    		}
    		this.removeUsersChangedFlag();
    		this.setTimeStampUsers(getUsersFile().lastModified());
    		
    		ph = null;
    	} catch (Exception ex) {
            Logger.getLogger(WorldDataHolder.class.getName()).log(Level.WARNING, null, ex);
        } 
    	GroupManager.setLoaded(true);
    	GroupManagerEventHandler.callEvent(GMSystemEvent.Action.RELOADED);
    }

    public void loadGroups(File groupsFile) {

    	GroupManager.setLoaded(false);
    	try {
    		setGroupsFile(groupsFile);
			loadGroups(this, groupsFile);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			throw new IllegalArgumentException("The file which should contain groups does not exist!\n" + groupsFile.getPath());
		} catch (IOException e) {
			e.printStackTrace();
			throw new IllegalArgumentException("Error access the groups file!\n" + groupsFile.getPath());
		}

    	GroupManager.setLoaded(true);
    }
    
    public void loadUsers(File usersFile) {

    	GroupManager.setLoaded(false);
    	try {
    		setUsersFile(usersFile);
			loadUsers(this, usersFile);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			throw new IllegalArgumentException("The file which should contain users does not exist!\n" + usersFile.getPath());
		} catch (IOException e) {
			e.printStackTrace();
			throw new IllegalArgumentException("Error access the users file!\n" + usersFile.getPath());
		}

    	GroupManager.setLoaded(true);
    }
    /**
     * Returns a NEW data holder containing data read from the files
     * 
     * @param worldName
     * @param groupsFile
     * @param usersFile
     * 
     * @throws FileNotFoundException
     * @throws IOException
     */
    public static WorldDataHolder load(String worldName, File groupsFile, File usersFile) throws FileNotFoundException, IOException {
    	WorldDataHolder ph = new WorldDataHolder(worldName);
    	
    	GroupManager.setLoaded(false);
    	if (groupsFile != null) loadGroups(ph, groupsFile);
    	if (usersFile != null) loadUsers(ph, usersFile);
    	GroupManager.setLoaded(true);
    	
    	return ph;
    }
    
    /**
     * Updates the WorldDataHolder from the Groups file
     * 
     * @param ph
     * @param groupsFile
     * 
     * @throws FileNotFoundException
     * @throws IOException
     */
    @SuppressWarnings({"rawtypes", "unchecked"})
    protected static void loadGroups(WorldDataHolder ph, File groupsFile) throws FileNotFoundException, IOException {

        //READ GROUPS FILE
        Yaml yamlGroups = new Yaml(new SafeConstructor());
        Map<String, Object> groupsRootDataNode;
        if (!groupsFile.exists()) {
            throw new IllegalArgumentException("The file which should contain groups does not exist!\n" + groupsFile.getPath());
        }
        FileInputStream groupsInputStream = new FileInputStream(groupsFile);
        try {
            groupsRootDataNode = (Map<String, Object>) yamlGroups.load(new UnicodeReader(groupsInputStream));
            if (groupsRootDataNode == null) {
                throw new NullPointerException();
            }
        } catch (Exception ex) {
            throw new IllegalArgumentException("The following file couldn't pass on Parser.\n" + groupsFile.getPath(), ex);
        } finally {
            groupsInputStream.close();
        }

        //PROCESS GROUPS FILE
        Map<String, List<String>> inheritance = new HashMap<String, List<String>>();
        try {
            Map<String, Object> allGroupsNode = (Map<String, Object>) groupsRootDataNode.get("groups");
            for (String groupKey : allGroupsNode.keySet()) {
                Map<String, Object> thisGroupNode = (Map<String, Object>) allGroupsNode.get(groupKey);
                Group thisGrp = ph.createGroup(groupKey);
                if (thisGrp == null) {
                    throw new IllegalArgumentException("I think this Group was declared more than once: " + groupKey + " in file: " + groupsFile.getPath());
                }
                if (thisGroupNode.get("default") == null) {
                    thisGroupNode.put("default", false);
                }
                if ((Boolean.parseBoolean(thisGroupNode.get("default").toString()))) {
                    if (ph.getDefaultGroup() != null) {
                        GroupManager.logger.warning("The group " + thisGrp.getName() + " is claiming to be default where" + ph.getDefaultGroup().getName() + " already was.");
                        GroupManager.logger.warning("Overriding first request for file: " + groupsFile.getPath());
                    }
                    ph.setDefaultGroup(thisGrp);
                }

                //PERMISSIONS NODE
                try {
	                if (thisGroupNode.get("permissions") == null) {
	                    thisGroupNode.put("permissions", new ArrayList<String>());
	                } else {
		                if (thisGroupNode.get("permissions") instanceof List) {
		                    for (Object o : ((List) thisGroupNode.get("permissions"))) {
		                    	try {
		                    		thisGrp.addPermission(o.toString());
		                    	} catch (NullPointerException e) {
		                    		// Ignore this entry as it's null.
		                    		//throw new IllegalArgumentException("Invalid permission node in group:  " + thisGrp.getName() + " in file: " + groupsFile.getPath());
		                    	}
		                    }
		                } else if (thisGroupNode.get("permissions") instanceof String) {
		                    thisGrp.addPermission((String) thisGroupNode.get("permissions"));
		                } else {
		                    throw new IllegalArgumentException("Unknown type of permissions node(Should be String or List<String>) for group:  " + thisGrp.getName() + " in file: " + groupsFile.getPath());
		                }
		                thisGrp.sortPermissions();
	                }
                } catch (Exception e) {
                	throw new IllegalArgumentException("Invalid formatting found in permissions section for group: " + thisGrp.getName() + " in file: " + groupsFile.getPath());
                }

                //INFO NODE
                try {
	                if (thisGroupNode.get("info") instanceof Map) {
		                Map<String, Object> infoNode = (Map<String, Object>) thisGroupNode.get("info");
		                if (infoNode != null) {
		                    thisGrp.setVariables(infoNode);
		                }
	                } else
	                	throw new IllegalArgumentException("Unknown entry found in Info section for group: " + thisGrp.getName() + " in file: " + groupsFile.getPath());
                } catch (Exception e1) {
                	throw new IllegalArgumentException("Invalid formatting found in info section for group: " + thisGrp.getName() + " in file: " + groupsFile.getPath());
                }
                	
                //END INFO NODE

                try {
	                if (thisGroupNode.get("inheritance") == null || thisGroupNode.get("inheritance") instanceof List) {
		                Object inheritNode = thisGroupNode.get("inheritance");
		                if (inheritNode == null) {
		                    thisGroupNode.put("inheritance", new ArrayList<String>());
		                } else if (inheritNode instanceof List) {
		                    List<String> groupsInh = (List<String>) inheritNode;
		                    for (String grp : groupsInh) {
		                        if (inheritance.get(groupKey) == null) {
		                            List<String> thisInherits = new ArrayList<String>();
		                            inheritance.put(groupKey, thisInherits);
		                        }
		                        inheritance.get(groupKey).add(grp);
		
		                    }
		                }
	                }else
	                	throw new IllegalArgumentException("Unknown entry found in inheritance section for group: " + thisGrp.getName() + " in file: " + groupsFile.getPath());
                } catch (Exception e2) {
                	throw new IllegalArgumentException("Invalid formatting found in inheritance section for group: " + thisGrp.getName() + " in file: " + groupsFile.getPath());
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            throw new IllegalArgumentException("Your " + groupsFile.getPath() + " file is invalid. See console for details.");
        }
        
        if (ph.getDefaultGroup() == null) {
            throw new IllegalArgumentException("There was no Default Group declared in file: " + groupsFile.getPath());
        }
        for (String groupKey : inheritance.keySet()) {
            List<String> inheritedList = inheritance.get(groupKey);
            Group thisGroup = ph.getGroup(groupKey);
            for (String inheritedKey : inheritedList) {
                Group inheritedGroup = ph.getGroup(inheritedKey);
                if (thisGroup != null && inheritedGroup != null) {
                    thisGroup.addInherits(inheritedGroup);
                }
            }
        }
        
        ph.removeGroupsChangedFlag();
        // Update the LastModified time.
        ph.setGroupsFile(groupsFile);
        ph.setTimeStampGroups(groupsFile.lastModified());

        //return ph;
    }
    
    /**
     * Updates the WorldDataHolder from the Users file
     * 
     * @param ph
     * @param usersFile
     * 
     * @throws FileNotFoundException
     * @throws IOException
     */
    @SuppressWarnings({"rawtypes", "unchecked"})
    protected static void loadUsers(WorldDataHolder ph, File usersFile) throws FileNotFoundException, IOException {
    	
        //READ USERS FILE
        Yaml yamlUsers = new Yaml(new SafeConstructor());
        Map<String, Object> usersRootDataNode;
        if (!usersFile.exists()) {
            throw new IllegalArgumentException("The file which should contain users does not exist!\n" + usersFile.getPath());
        }
        FileInputStream usersInputStream = new FileInputStream(usersFile);
        try {
            usersRootDataNode = (Map<String, Object>) yamlUsers.load(new UnicodeReader(usersInputStream));
            if (usersRootDataNode == null) {
                throw new NullPointerException();
            }
        } catch (Exception ex) {
            throw new IllegalArgumentException("The following file couldn't pass on Parser.\n" + usersFile.getPath(), ex);
        } finally {
            usersInputStream.close();
        }

        // PROCESS USERS FILE
        Map<String, Object> allUsersNode = (Map<String, Object>) usersRootDataNode.get("users");
        
        // Load users if the file is NOT empty
        if (allUsersNode != null)
	        for (String usersKey : allUsersNode.keySet()) {
	            Map<String, Object> thisUserNode = (Map<String, Object>) allUsersNode.get(usersKey);
	            User thisUser = ph.createUser(usersKey);
	            if (thisUser == null) {
	                throw new IllegalArgumentException("I think this user was declared more than once: " + usersKey + " in file: " + usersFile.getPath());
	            }
	            if (thisUserNode.get("permissions") == null) {
	                thisUserNode.put("permissions", new ArrayList<String>());
	            } else {
		            if (thisUserNode.get("permissions") instanceof List) {
		                for (Object o : ((List) thisUserNode.get("permissions"))) {
		                    thisUser.addPermission(o.toString());
		                }
		            } else if (thisUserNode.get("permissions") instanceof String) {
		            	try {
		                	thisUser.addPermission(thisUserNode.get("permissions").toString());
		            	} catch (NullPointerException e) {
		            		// Ignore this entry as it's null.
		            		//throw new IllegalArgumentException("Invalid permission node for user:  " + thisUser.getName() + " in file: " + UserFile.getPath());
		            	}
		            }
		            thisUser.sortPermissions();
	            }
	
	            //SUBGROUPS LOADING
	            if (thisUserNode.get("subgroups") == null) {
	                thisUserNode.put("subgroups", new ArrayList<String>());
	            }
	            if (thisUserNode.get("subgroups") instanceof List) {
	                for (Object o : ((List) thisUserNode.get("subgroups"))) {
	                    Group subGrp = ph.getGroup(o.toString());
	                    if (subGrp != null) {
	                        thisUser.addSubGroup(subGrp);
	                    } else {
	                        GroupManager.logger.warning("Subgroup " + o.toString() + " not found for user " + thisUser.getName() + ". Ignoring entry in file: " + usersFile.getPath());
	                    }
	                }
	            } else if (thisUserNode.get("subgroups") instanceof String) {
	                Group subGrp = ph.getGroup(thisUserNode.get("subgroups").toString());
	                if (subGrp != null) {
	                    thisUser.addSubGroup(subGrp);
	                } else {
	                    GroupManager.logger.warning("Subgroup " + thisUserNode.get("subgroups").toString() + " not found for user " + thisUser.getName() + ". Ignoring entry in file: " + usersFile.getPath());
	                }
	            }
	
	
	            //USER INFO NODE
	            
	            //INFO NODE
                if (thisUserNode.get("info") instanceof Map) {
	                Map<String, Object> infoNode = (Map<String, Object>) thisUserNode.get("info");
	                if (infoNode != null) {
	                	thisUser.setVariables(infoNode);
	                }
                } else if (thisUserNode.get("info") != null)
                	throw new IllegalArgumentException("Unknown entry found in Info section for user: " + thisUser.getName() + " in file: " + usersFile.getPath());
                	
                //END INFO NODE
	
	
	            if (thisUserNode.get("group") != null) {
	                Group hisGroup = ph.getGroup(thisUserNode.get("group").toString());
	                if (hisGroup == null) {
	                	GroupManager.logger.warning("There is no group " + thisUserNode.get("group").toString() + ", as stated for player " + thisUser.getName() + ": Set to '" + ph.getDefaultGroup().getName() + "' for file: " + usersFile.getPath());
	                	hisGroup = ph.getDefaultGroup();
	                    //throw new IllegalArgumentException("There is no group " + thisUserNode.get("group").toString() + ", as stated for player " + thisUser.getName());
	                }
	                thisUser.setGroup(hisGroup);
	            } else {
	                thisUser.setGroup(ph.getDefaultGroup());
	            }
	        }
        
        ph.removeUsersChangedFlag();
        // Update the LastModified time.
        ph.setUsersFile(usersFile);
        ph.setTimeStampUsers(usersFile.lastModified());
    }

    /**
     * Write a dataHolder in a specified file
     * @param ph
     * @param groupsFile
     */
    public static void writeGroups(WorldDataHolder ph, File groupsFile) {
        Map<String, Object> root = new HashMap<String, Object>();

        Map<String, Object> groupsMap = new HashMap<String, Object>();

        root.put("groups", groupsMap);
        for (String groupKey : ph.getGroups().keySet()) {
            Group group = ph.getGroups().get(groupKey);

            Map<String, Object> aGroupMap = new HashMap<String, Object>();
            groupsMap.put(group.getName(), aGroupMap);

            if (ph.getDefaultGroup() == null) {
                GroupManager.logger.severe("There is no default group for world: " + ph.getName());
            }
            aGroupMap.put("default", group.equals(ph.getDefaultGroup()));

            Map<String, Object> infoMap = new HashMap<String, Object>();
            aGroupMap.put("info", infoMap);

            for (String infoKey : group.getVariables().getVarKeyList()) {
                infoMap.put(infoKey, group.getVariables().getVarObject(infoKey));
            }

            aGroupMap.put("inheritance", group.getInherits());

            aGroupMap.put("permissions", group.getPermissionList());
        }

        if (!root.isEmpty()) {
	        DumperOptions opt = new DumperOptions();
	        opt.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
	        final Yaml yaml = new Yaml(opt);
	        try {
	        	OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream(groupsFile), "UTF-8");
	        	
	        	String newLine = System.getProperty("line.separator");
	        	
	        	out.write("# Group inheritance" + newLine);
	        	out.write("# any inherited groups prefixed with a g: are global groups" + newLine);
	        	out.write("# These groups are defined in the globalgroups.yml" + newLine);
	        	out.write("# and can be inherited in any worlds groups/users.yml." + newLine);
	        	out.write("#" + newLine);
	        	out.write("# Groups without the g: prefix are groups local to this world" + newLine);
	        	out.write("# and defined in the this groups.yml file." + newLine);
	        	out.write(newLine);
	        	
	            yaml.dump(root, out);
	            out.close();
	        } catch (UnsupportedEncodingException ex) {
	        } catch (FileNotFoundException ex) {
	        } catch (IOException e) {
			}
        }
        
        // Update the LastModified time.
        ph.setGroupsFile(groupsFile);
        ph.setTimeStampGroups(groupsFile.lastModified());
        ph.removeGroupsChangedFlag();
        
        if (GroupManager.isLoaded())
        	GroupManagerEventHandler.callEvent(GMSystemEvent.Action.SAVED);

        /*FileWriter tx = null;
        try {
        tx = new FileWriter(groupsFile, false);
        tx.write(yaml.dump(root));
        tx.flush();
        } catch (Exception e) {
        } finally {
        try {
        tx.close();
        } catch (IOException ex) {
        }
        }*/
    }

    /**
     * Write a dataHolder in a specified file
     * @param ph
     * @param usersFile
     */
    public static void writeUsers(WorldDataHolder ph, File usersFile) {
        Map<String, Object> root = new HashMap<String, Object>();

        Map<String, Object> usersMap = new HashMap<String, Object>();
        root.put("users", usersMap);
        for (String userKey : ph.getUsers().keySet()) {
            User user = ph.getUsers().get(userKey);
            if ((user.getGroup() == null || user.getGroup().equals(ph.getDefaultGroup())) && user.getPermissionList().isEmpty() && user.getVariables().isEmpty() && user.isSubGroupsEmpty()) {
                continue;
            }

            Map<String, Object> aUserMap = new HashMap<String, Object>();
            usersMap.put(user.getName(), aUserMap);

            if (user.getGroup() == null) {
                aUserMap.put("group", ph.getDefaultGroup().getName());
            } else {
                aUserMap.put("group", user.getGroup().getName());
            }
            //USER INFO NODE - BETA
            if (user.getVariables().getSize() > 0) {
                Map<String, Object> infoMap = new HashMap<String, Object>();
                aUserMap.put("info", infoMap);
                for (String infoKey : user.getVariables().getVarKeyList()) {
                    infoMap.put(infoKey, user.getVariables().getVarObject(infoKey));
                }
            }
            //END USER INFO NODE - BETA
            aUserMap.put("permissions", user.getPermissionList());

            //SUBGROUPS NODE - BETA
            aUserMap.put("subgroups", user.subGroupListStringCopy());
            //END SUBGROUPS NODE - BETA
        }
        
        if (!root.isEmpty()) {
	        DumperOptions opt = new DumperOptions();
	        opt.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
	        final Yaml yaml = new Yaml(opt);
	        try {
	        	OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream(usersFile), "UTF-8");
	            yaml.dump(root, out);
	            out.close();
	        } catch (UnsupportedEncodingException ex) {
	        } catch (FileNotFoundException ex) {
	        } catch (IOException e) {
			}
        }
        
        // Update the LastModified time.
        ph.setUsersFile(usersFile);
        ph.setTimeStampUsers(usersFile.lastModified());
        ph.removeUsersChangedFlag();
        
        if (GroupManager.isLoaded())
        	GroupManagerEventHandler.callEvent(GMSystemEvent.Action.SAVED);
        
        /*FileWriter tx = null;
        try {
        tx = new FileWriter(usersFile, false);
        tx.write(yaml.dump(root));
        tx.flush();
        } catch (Exception e) {
        } finally {
        try {
        tx.close();
        } catch (IOException ex) {
        }
        }*/
    }

    /**
     * Don't use this. Unless you want to make this plugin to interact with original Nijikokun Permissions
     * This method is supposed to make the original one reload the file, and propagate the changes made here.
     *
     * Prefer to use the AnjoCaido's fake version of Nijikokun's Permission plugin.
     * The AnjoCaido's Permission can propagate the changes made on this plugin instantly,
     * without need to save the file.
     *
     * @param server the server that holds the plugin
     * @deprecated it is not used anymore... unless if you use original Permissions
     */
    @Deprecated
    public static void reloadOldPlugins(Server server) {
        // Only reload permissions
        PluginManager pm = server.getPluginManager();
        Plugin[] plugins = pm.getPlugins();
        for (int i = 0; i < plugins.length; i++) {
            plugins[i].getConfiguration().load();
            try {
                plugins[i].getClass().getMethod("setupPermissions").invoke(plugins[i]);
            } catch (Exception ex) {
                continue;
            }
        }
    }

    /**
     * @return the permissionsHandler
     */
    public AnjoPermissionsHandler getPermissionsHandler() {
        if (permissionsHandler == null) {
            permissionsHandler = new AnjoPermissionsHandler(this);
        }
        return permissionsHandler;
    }
    
    /**
	 * @param haveUsersChanged the haveUsersChanged to set
	 */
	public void setUsersChanged(boolean haveUsersChanged) {
		users.setUsersChanged(haveUsersChanged);
	}

    /**
     *
     * @return true if any user data has changed
     */
    public boolean haveUsersChanged() {
        if (users.HaveUsersChanged()) {
            return true;
        }
        for (User u : users.getUsers().values()) {
            if (u.isChanged()) {
                return true;
            }
        }
        return false;
    }

    /**
	 * @param setGroupsChanged the haveGroupsChanged to set
	 */
	public void setGroupsChanged(boolean setGroupsChanged) {
		groups.setGroupsChanged(setGroupsChanged);
	}
	
    /**
     *
     * @return true if any group data has changed.
     */
    public boolean haveGroupsChanged() {
        if (groups.HaveGroupsChanged()) {
            return true;
        }
        for (Group g : groups.getGroups().values()) {
            if (g.isChanged()) {
                return true;
            }
        }
        return false;
    }

    /**
     *
     */
    public void removeUsersChangedFlag() {
    	setUsersChanged(false);
        for (User u : getUsers().values()) {
            u.flagAsSaved();
        }
    }

    /**
     *
     */
    public void removeGroupsChangedFlag() {
        setGroupsChanged(false);
        for (Group g : getGroups().values()) {
            g.flagAsSaved();
        }
    }

    /**
     * @return the usersFile
     */
    public File getUsersFile() {
        return users.getUsersFile();
    }
    
    /**
     * @param file the usersFile to set
     */
    public void setUsersFile(File file) {
        users.setUsersFile(file);
    }

    /**
     * @return the groupsFile
     */
    public File getGroupsFile() {
        return groups.getGroupsFile();
    }
    
    /**
     * @param file the groupsFile to set
     */
    public void setGroupsFile(File file) {
        groups.setGroupsFile(file);
    }

    /**
     * @return the name
     */
    public String getName() {
        return name;
    }
    
    /**
	 * Resets Groups.
	 */
	public void resetGroups() {
		//setDefaultGroup(null);
		groups.setGroups(new HashMap<String, Group>());
	}
    /**
	 * Resets Users
	 */
	public void resetUsers() {
		users.setUsers(new HashMap<String, User>());
	}
    
    /**
	 * @return the groups
	 */
	public Map<String, Group> getGroups() {
		return groups.getGroups();
	}
    /**
	 * @return the users
	 */
	public Map<String, User> getUsers() {
		return users.getUsers();
	}
	
	/**
	 * @return the groups
	 */
	public GroupsDataHolder getGroupsObject() {
		return groups;
	}
	/**
	 * @param groupsDataHolder the GroupsDataHolder to set
	 */
	public void setGroupsObject(GroupsDataHolder groupsDataHolder) {
		groups = groupsDataHolder;
	}
    /**
	 * @return the users
	 */
	public UsersDataHolder getUsersObject() {
		return users;
	}
	/**
	 * @param usersDataHolder the UsersDataHolder to set
	 */
	public void setUsersObject(UsersDataHolder usersDataHolder) {
		users = usersDataHolder;
	}
    
    /**
	 * @return the timeStampGroups
	 */
	public long getTimeStampGroups() {
		return groups.getTimeStampGroups();
	}
    /**
	 * @return the timeStampUsers
	 */
	public long getTimeStampUsers() {
		return users.getTimeStampUsers();
	}

	/**
	 * @param timeStampGroups the timeStampGroups to set
	 */
	protected void setTimeStampGroups(long timeStampGroups) {
		groups.setTimeStampGroups(timeStampGroups);
	}
    /**
	 * @param timeStampUsers the timeStampUsers to set
	 */
	protected void setTimeStampUsers(long timeStampUsers) {
		users.setTimeStampUsers(timeStampUsers);
	}
	
	public void setTimeStamps() {
		if (getGroupsFile() != null)
			setTimeStampGroups(getGroupsFile().lastModified());
		if (getUsersFile() != null)
			setTimeStampUsers(getUsersFile().lastModified());
	}	
	
}