// $Id$
/*
 * WorldEdit
 * Copyright (C) 2010 sk89q <http://www.sk89q.com> and contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

package com.sk89q.worldedit.command.tool;

import com.sk89q.worldedit.*;
import com.sk89q.worldedit.blocks.BaseBlock;

/**
 * A mode that cycles the data values of supported blocks.
 * 
 * @author sk89q
 */
public class BlockDataCyler implements DoubleActionBlockTool {

    public boolean canUse(LocalPlayer player) {
        return player.hasPermission("worldedit.tool.data-cycler");
    }

    private boolean handleCycle(ServerInterface server, LocalConfiguration config,
            LocalPlayer player, LocalSession session, WorldVector clicked, boolean forward) {

        LocalWorld world = clicked.getWorld();

        int type = world.getBlockType(clicked);
        int data = world.getBlockData(clicked);

        if (config.allowedDataCycleBlocks.size() > 0
                && !player.hasPermission("worldedit.override.data-cycler")
                && !config.allowedDataCycleBlocks.contains(type)) {
            player.printError("You are not permitted to cycle the data value of that block.");
            return true;
        }

        int increment = forward ? 1 : -1;
        data = (new BaseBlock(type, data)).cycleData(increment);

        if (data < 0) {
            player.printError("That block's data cannot be cycled!");
        } else {
            world.setBlockData(clicked, data);
        }

        return true;
    }

    public boolean actPrimary(ServerInterface server, LocalConfiguration config,
            LocalPlayer player, LocalSession session, WorldVector clicked) {
        return handleCycle(server, config, player, session, clicked, true);
    }

    public boolean actSecondary(ServerInterface server,
            LocalConfiguration config, LocalPlayer player,
            LocalSession session, WorldVector clicked) {
        return handleCycle(server, config, player, session, clicked, false);
    }

}