/*
 * Minecraft Forge
 * Copyright (c) 2016-2019.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation version 2.1
 * of the License.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

package net.minecraftforge.fml.client.config;

/**
 * Provides an interface for defining GuiConfigEntry.listEntry objects.
 */
public interface IConfigEntry
{
    /**
     * Gets the IConfigElement object owned by this entry.
     * @return
     */
    IConfigElement getConfigElement();

    /**
     * Gets the name of the ConfigElement owned by this entry.
     */
    String getName();

    /**
     * Gets the current value of this entry.
     */
    Object getCurrentValue();

    /**
     * Gets the current values of this list entry.
     */
    Object[] getCurrentValues();

    /**
     * Is this list entry enabled?
     *
     * @return true if this entry's controls should be enabled, false otherwise.
     */
    boolean enabled();

    /**
     * Handles user keystrokes for any GuiTextField objects in this entry. Call {@link GuiTextField#textboxKeyTyped(char, int)} for any GuiTextField
     * objects that should receive the input provided.
     */
    void keyTyped(char eventChar, int eventKey);

    /**
     * Call {@link GuiTextField#updateCursorCounter()} for any GuiTextField objects in this entry.
     */
    void updateCursorCounter();

    /**
     * Call {@link GuiTextField#mouseClicked(int, int, int)} for and GuiTextField objects in this entry.
     */
    void mouseClicked(int x, int y, int mouseEvent);

    /**
     * Is this entry's value equal to the default value? Generally true should be returned if this entry is not a property or category
     * entry.
     *
     * @return true if this entry's value is equal to this entry's default value.
     */
    boolean isDefault();

    /**
     * Sets this entry's value to the default value.
     */
    void setToDefault();

    /**
     * Handles reverting any changes that have occurred to this entry.
     */
    void undoChanges();

    /**
     * Has the value of this entry changed?
     *
     * @return true if changes have been made to this entry's value, false otherwise.
     */
    boolean isChanged();

    /**
     * Handles saving any changes that have been made to this entry back to the underlying object. It is a good practice to check
     * isChanged() before performing the save action. This method should return true if the element has changed AND REQUIRES A RESTART.
     */
    boolean saveConfigElement();

    /**
     * Handles drawing any tooltips that apply to this entry. This method is called after all other GUI elements have been drawn to the
     * screen, so it could also be used to draw any GUI element that needs to be drawn after all entries have had drawEntry() called.
     */
    void drawToolTip(int mouseX, int mouseY);

    /**
     * Gets this entry's label width.
     */
    int getLabelWidth();

    /**
     * Gets this entry's right-hand x boundary. This value is used to control where the scroll bar is placed.
     */
    int getEntryRightBound();

    /**
     * This method is called when the parent GUI is closed. Most handlers won't need this; it is provided for special cases.
     */
    void onGuiClosed();
}