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package org.anjocaido.groupmanager.dataholder;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.anjocaido.groupmanager.data.User;

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

    /**
     *
     */
    protected final Map<String, User> overloadedUsers = Collections.synchronizedMap(new HashMap<String, User>());

    /**
     * 
     * @param ph
     */
    public OverloadedWorldHolder(WorldDataHolder ph) {

        super(ph.getName());
        this.setGroupsFile(ph.getGroupsFile());
        this.setUsersFile(ph.getUsersFile());
        this.groups = ph.groups;
        this.users = ph.users;
    }

    /**
     * 
     * @param userName
     * @return user object or a new user if none exists.
     */
    @Override
    public User getUser(String userName) {

        // OVERLOADED CODE
        String userNameLowered = userName.toLowerCase();
        if (overloadedUsers.containsKey(userNameLowered)) {
            return overloadedUsers.get(userNameLowered);
        }
        // END CODE

        return super.getUser(userName);
    }

    /**
     * 
     * @param theUser
     */
    @Override
    public void addUser(User theUser) {

        if (theUser.getDataSource() != this) {
            theUser = theUser.clone(this);
        }
        if (theUser == null) {
            return;
        }
        if ((theUser.getGroup() == null) || (!getGroups().containsKey(theUser.getGroupName().toLowerCase()))) {
            theUser.setGroup(getDefaultGroup());
        }
        // OVERLOADED CODE
        if (overloadedUsers.containsKey(theUser.getUUID().toLowerCase())) {
            overloadedUsers.remove(theUser.getUUID().toLowerCase());
            overloadedUsers.put(theUser.getUUID().toLowerCase(), theUser);
            return;
        }
        // END CODE
        removeUser(theUser.getUUID());
        getUsers().put(theUser.getUUID().toLowerCase(), theUser);
        setUsersChanged(true);
    }

    /**
     * 
     * @param userId
     * @return true if removed/false if not found.
     */
    @Override
    public boolean removeUser(String userId) {

        // OVERLOADED CODE
        if (overloadedUsers.containsKey(userId.toLowerCase())) {
            overloadedUsers.remove(userId.toLowerCase());
            return true;
        }
        // END CODE
        if (getUsers().containsKey(userId.toLowerCase())) {
            getUsers().remove(userId.toLowerCase());
            setUsersChanged(true);
            return true;
        }
        return false;
    }

    @Override
    public boolean removeGroup(String groupName) {

        if (groupName.equals(getDefaultGroup())) {
            return false;
        }
        synchronized (getGroups()) {
            for (String key : getGroups().keySet()) {
                if (groupName.equalsIgnoreCase(key)) {
                    getGroups().remove(key);
                    synchronized (getUsers()) {
                        for (String userKey : getUsers().keySet()) {
                            User user = getUsers().get(userKey);
                            if (user.getGroupName().equalsIgnoreCase(key)) {
                                user.setGroup(getDefaultGroup());
                            }

                        }
                    }
                    // OVERLOADED CODE
                    synchronized (overloadedUsers) {
                        for (String userKey : overloadedUsers.keySet()) {
                            User user = overloadedUsers.get(userKey);
                            if (user.getGroupName().equalsIgnoreCase(key)) {
                                user.setGroup(getDefaultGroup());
                            }

                        }
                    }
                    // END OVERLOAD
                    setGroupsChanged(true);
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 
     * @return Collection of all users
     */
    @Override
    public Collection<User> getUserList() {

        Collection<User> overloadedList = new ArrayList<User>();
        synchronized (getUsers()) {
            Collection<User> normalList = getUsers().values();
            for (User u : normalList) {
                if (overloadedUsers.containsKey(u.getUUID().toLowerCase())) {
                    overloadedList.add(overloadedUsers.get(u.getUUID().toLowerCase()));
                } else {
                    overloadedList.add(u);
                }
            }
        }
        return overloadedList;
    }

    /**
     * 
     * @param userId
     * @return true if user is overloaded.
     */
    public boolean isOverloaded(String userId) {

        return overloadedUsers.containsKey(userId.toLowerCase());
    }

    /**
     * 
     * @param userId
     */
    public void overloadUser(String userId) {

        if (!isOverloaded(userId)) {
            User theUser = getUser(userId);
            theUser = theUser.clone();
            if (overloadedUsers.containsKey(theUser.getUUID().toLowerCase())) {
                overloadedUsers.remove(theUser.getUUID().toLowerCase());
            }
            overloadedUsers.put(theUser.getUUID().toLowerCase(), theUser);
        }
    }

    /**
     * 
     * @param userId
     */
    public void removeOverload(String userId) {

        User theUser = getUser(userId);
        overloadedUsers.remove(theUser.getUUID().toLowerCase());
    }

    /**
     * Gets the user in normal state. Surpassing the overload state.
     * It doesn't affect permissions. But it enables plugins change the
     * actual user permissions even in overload mode.
     * 
     * @param userId
     * @return user object
     */
    public User surpassOverload(String userId) {

        if (!isOverloaded(userId)) {
            return getUser(userId);
        }
        if (getUsers().containsKey(userId.toLowerCase())) {
            return getUsers().get(userId.toLowerCase());
        }
        User newUser = createUser(userId);
        return newUser;
    }
}