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package org.anjocaido.groupmanager.data;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import org.anjocaido.groupmanager.GroupManager;
import org.anjocaido.groupmanager.dataholder.WorldDataHolder;
import org.anjocaido.groupmanager.events.GMGroupEvent.Action;

/**
 *
 * @author gabrielcouto/ElgarL
 */
public class Group extends DataUnit implements Cloneable {
    /**
     * The group it inherits DIRECTLY!
     */
    private List<String> inherits = Collections.unmodifiableList(Collections.<String> emptyList());
    /**
     * This one holds the fields in INFO node.
     * like prefix = 'c'
     * or build = false
     */
    private GroupVariables variables = new GroupVariables(this);

    /**
     * Constructor for Global Groups.
     *
     * @param name
     */
    public Group(final String name) {
        super(name);
    }

    /**
     * Constructor for individual World Groups.
     *
     * @param name
     */
    public Group(final WorldDataHolder source, final String name) {
        super(source, name);
    }

    /**
     * @param inherit
     *            the inherits to set
     */
    public void addInherits(final Group inherit) {
        if (!isGlobal()) {
            if (!this.getDataSource().groupExists(inherit.getName())) {
                getDataSource().addGroup(inherit);
            }
            if (!inherits.contains(inherit.getName().toLowerCase())) {
                final List<String> clone = new ArrayList<String>(inherits);
                clone.add(inherit.getName().toLowerCase());
                inherits = Collections.unmodifiableList(clone);
            }
            flagAsChanged();
            if (GroupManager.isLoaded()) {
                GroupManager.BukkitPermissions.updateAllPlayers();
                GroupManager.getGMEventHandler().callEvent(this, Action.GROUP_INHERITANCE_CHANGED);
            }
        }
    }

    /**
     * Clone this group
     *
     * @return a clone of this group
     */
    @Override
    public Group clone() {
        Group clone;
        if (isGlobal()) {
            clone = new Group(this.getName());
        } else {
            clone = new Group(getDataSource(), this.getName());
            clone.inherits = this.getInherits().isEmpty() ? Collections.unmodifiableList(Collections.<String> emptyList()) : Collections.unmodifiableList(new ArrayList<String>(this.getInherits()));
        }
        for (final String perm : this.getPermissionList()) {
            clone.addPermission(perm);
        }
        clone.variables = variables.clone(clone);
        // clone.flagAsChanged();
        return clone;
    }

    /**
     * Use this to deliver a group from a different dataSource to another
     *
     * @param dataSource
     * @return Null or Clone
     */
    public Group clone(final WorldDataHolder dataSource) {
        if (dataSource.groupExists(this.getName())) {
            return null;
        }
        final Group clone = dataSource.createGroup(this.getName());
        // Don't add inheritance for GlobalGroups
        if (!isGlobal()) {
            clone.inherits = this.getInherits().isEmpty() ? Collections.unmodifiableList(Collections.<String> emptyList()) : Collections.unmodifiableList(new ArrayList<String>(this.getInherits()));
        }
        for (final String perm : this.getPermissionList()) {
            clone.addPermission(perm);
        }
        clone.variables = variables.clone(clone);
        clone.flagAsChanged(); // use this to make the new dataSource save the new group
        return clone;
    }

    /**
     * an unmodifiable list of inherits list
     * You can't manage the list by here
     * Lol... version 0.6 had a problem because this.
     *
     * @return the inherits
     */
    public List<String> getInherits() {
        return inherits;
    }

    /**
     * @return the name
     */
    public String getName() {
        return this.getUUID();
    }

    /**
     * @return the variables
     */
    public GroupVariables getVariables() {
        return variables;
    }

    /**
     * Is this a GlobalGroup
     *
     * @return true if this is a global group
     */
    public boolean isGlobal() {
        return (getDataSource() == null);
    }

    public boolean removeInherits(final String inherit) {
        if (!isGlobal()) {
            if (this.inherits.contains(inherit.toLowerCase())) {
                final List<String> clone = new ArrayList<String>(inherits);
                clone.remove(inherit.toLowerCase());
                inherits = Collections.unmodifiableList(clone);
                flagAsChanged();
                GroupManager.getGMEventHandler().callEvent(this, Action.GROUP_INHERITANCE_CHANGED);
                return true;
            }
        }
        return false;
    }

    /**
     *
     * @param varList
     */
    public void setVariables(final Map<String, Object> varList) {
        if (!isGlobal()) {
            final GroupVariables temp = new GroupVariables(this, varList);
            variables.clearVars();
            for (final String key : temp.getVarKeyList()) {
                variables.addVar(key, temp.getVarObject(key));
            }
            flagAsChanged();
            if (GroupManager.isLoaded()) {
                GroupManager.BukkitPermissions.updateAllPlayers();
                GroupManager.getGMEventHandler().callEvent(this, Action.GROUP_INFO_CHANGED);
            }
        }
    }
}