// $Id$
/*
 * WorldEdit
 * Copyright (C) 2010 sk89q <http://www.sk89q.com>
 *
 * 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/>.
*/

import java.util.logging.Level;
import java.util.logging.Logger;
import com.sk89q.worldedit.EditSession;
import com.sk89q.worldedit.LocalWorld;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.blocks.BaseItemStack;

/**
 * World for hMod.
 * 
 * @author sk89q
 */
public class HMWorld extends LocalWorld {
    /**
     * Logger.
     */
    private final Logger logger = Logger.getLogger("Minecraft.WorldEdit");
    
    /**
     * Set block type.
     *
     * @param pt
     * @param type
     * @return
     */
    public boolean setBlockType(Vector pt, int type) {
        // Can't set colored cloth or crash
        if ((type >= 21 && type <= 34) || type == 36) {
            return false;
        }
        return etc.getServer().setBlockAt(type, pt.getBlockX(), pt.getBlockY(),
                pt.getBlockZ());
    }
    
    /**
     * Get block type.
     *
     * @param pt
     * @return
     */
    public int getBlockType(Vector pt) {
        return etc.getServer().getBlockIdAt(pt.getBlockX(), pt.getBlockY(),
                pt.getBlockZ());
    }

    /**
     * Set block data.
     *
     * @param pt
     * @param data
     * @return
     */
    public void setBlockData(Vector pt, int data) {
        etc.getServer().setBlockData(pt.getBlockX(), pt.getBlockY(),
                        pt.getBlockZ(), data);
    }

    /**
     * Get block data.
     *
     * @param pt
     * @return
     */
    public int getBlockData(Vector pt) {
        return etc.getServer().getBlockData(pt.getBlockX(), pt.getBlockY(),
                pt.getBlockZ());
    }
    
    /**
     * Set sign text.
     *
     * @param pt
     * @param text
     */
    public void setSignText(Vector pt, String[] text) {
        Sign signData = (Sign)etc.getServer().getComplexBlock(
                pt.getBlockX(), pt.getBlockY(), pt.getBlockZ());
        if (signData == null) {
            return;
        }
        for (byte i = 0; i < 4; i++) {
            signData.setText(i, text[i]);
        }
        signData.update();
    }
    
    /**
     * Get sign text.
     *
     * @param pt
     * @return
     */
    public String[] getSignText(Vector pt) {
        Sign signData = (Sign)etc.getServer().getComplexBlock(
                pt.getBlockX(), pt.getBlockY(), pt.getBlockZ());
        if (signData == null) {
            return new String[]{"", "", "", ""};
        }
        String[] text = new String[4];
        for (byte i = 0; i < 4; i++) {
            text[i] = signData.getText(i);
        }
        return text;
    }

    /**
     * Gets the contents of chests. Will return null if the chest does not
     * really exist or it is the second block for a double chest.
     *
     * @param pt
     * @return
     */
    public BaseItemStack[] getChestContents(Vector pt) {
        ComplexBlock cblock = etc.getServer().getOnlyComplexBlock(
                pt.getBlockX(), pt.getBlockY(), pt.getBlockZ());

        BaseItemStack[] items;
        Item[] nativeItems;

        if (cblock instanceof Chest) {
            Chest chest = (Chest)cblock;
            nativeItems = chest.getContents();
        } else {
            return null;
        }

        items = new BaseItemStack[nativeItems.length];

        for (byte i = 0; i < nativeItems.length; i++) {
            Item item = nativeItems[i];
            
            if (item != null) {
                items[i] = new BaseItemStack((short)item.getItemId(),
                        item.getAmount(), (short)item.getDamage());
            }
        }

        return items;
    }

    /**
     * Sets a chest slot.
     *
     * @param pt
     * @param contents
     * @return
     */
    public boolean setChestContents(Vector pt,
            BaseItemStack[] contents) {
        
        ComplexBlock cblock = etc.getServer().getOnlyComplexBlock(
                pt.getBlockX(), pt.getBlockY(), pt.getBlockZ());

        if (cblock instanceof Chest) {
            Chest chest = (Chest)cblock;
            Item[] nativeItems = new Item[contents.length];
            
            for (int i = 0; i < contents.length; i++) {
                BaseItemStack item = contents[i];
                
                if (item != null) {
                    Item nativeItem =
                        new Item(item.getID(), item.getAmount());
                    nativeItem.setDamage(item.getDamage());
                    nativeItems[i] = nativeItem;
                }
            }
            
            setContents(chest, nativeItems);
        }

        return false;
    }

    /**
     * Clear a chest's contents.
     * 
     * @param pt
     */
    public boolean clearChest(Vector pt) {
        ComplexBlock cblock = etc.getServer().getOnlyComplexBlock(
                pt.getBlockX(), pt.getBlockY(), pt.getBlockZ());

        if (cblock instanceof Chest) {
            Chest chest = (Chest)cblock;
            chest.clearContents();
            chest.update();
            return true;
        }


        return false;
    }
    
    /**
     * Set the contents of an ItemArray.
     * 
     * @param itemArray
     * @param contents
     */
    private void setContents(ItemArray<?> itemArray, Item[] contents) {
        int size = contents.length;

        for (int i = 0; i < size; i++) {
            if (contents[i] == null) {
                itemArray.removeItem(i);
            } else {
                itemArray.setSlot(contents[i].getItemId(),
                        contents[i].getAmount(), contents[i].getDamage(), i);
            }
        }
    }

    /**
     * Set mob spawner mob type.
     *
     * @param pt
     * @param mobType
     */
    public void setMobSpawnerType(Vector pt, String mobType) {
        ComplexBlock cblock = etc.getServer().getComplexBlock(
                pt.getBlockX(), pt.getBlockY(), pt.getBlockZ());

        if (!(cblock instanceof MobSpawner)) {
            return;
        }

        MobSpawner mobSpawner = (MobSpawner)cblock;
        mobSpawner.setSpawn(mobType);
        mobSpawner.update();
    }

    /**
     * Get mob spawner mob type. May return an empty string.
     *
     * @param pt
     * @param mobType
     */
    public String getMobSpawnerType(Vector pt) {
        try {
            return MinecraftServerInterface.getMobSpawnerType(pt);
        } catch (Throwable t) {
            logger.severe("Failed to get mob spawner type (do you need to update WorldEdit due to a Minecraft update?): "
                    + t.getMessage());
            return "";
        }
    }

    /**
     * Generate a tree at a location.
     * 
     * @param pt
     * @return
     */
    public boolean generateTree(EditSession editSession, Vector pt) {
        try {
            return MinecraftServerInterface.generateTree(editSession, pt);
        } catch (Throwable t) {
            logger.log(Level.SEVERE, 
                    "Failed to create tree (do you need to update WorldEdit " +
                    "due to a Minecraft update?)", t);
            return false;
        }
    }

    /**
     * Generate a big tree at a location.
     * 
     * @param pt
     * @return
     */
    public boolean generateBigTree(EditSession editSession, Vector pt) {
        try {
            return MinecraftServerInterface.generateBigTree(editSession, pt);
        } catch (Throwable t) {
            logger.log(Level.SEVERE, 
                    "Failed to create big tree (do you need to update WorldEdit " +
                    "due to a Minecraft update?)", t);
            return false;
        }
    }

    /**
     * Drop an item.
     *
     * @param pt
     * @param type
     * @param count
     * @param times
     */
    public void dropItem(Vector pt, int type, int count) {
        etc.getServer().dropItem(pt.getBlockX(), pt.getBlockY(), pt.getBlockZ(),
                type, count);
    }

    /**
     * Drop an item.
     *
     * @param pt
     * @param type
     * @param count
     * @param times
     */
    public void dropItem(Vector pt, int type) {
        etc.getServer().dropItem(pt.getBlockX(), pt.getBlockY(), pt.getBlockZ(),
                type, 1);
    }
    
    /**
     * Kill mobs in an area.
     * 
     * @param origin
     * @param radius
     * @return
     */
    public int killMobs(Vector origin, int radius) {
        int killed = 0;
        
        for (Mob mob : etc.getServer().getMobList()) {
            Vector mobPos = new Vector(mob.getX(), mob.getY(), mob.getZ());
            if (mob.getHealth() > 0
                    && (radius == -1 || mobPos.distance(origin) <= radius)) {
                mob.setHealth(0);
                killed++;
            }
        }
        
        return killed;
    }

    @Override
    public boolean equals(Object other) {
        return other instanceof HMWorld;
    }

    @Override
    public int hashCode() {
        return 1;
    }
}