/*
 * WorldEdit, a Minecraft world manipulation toolkit
 * Copyright (C) sk89q <http://www.sk89q.com>
 * Copyright (C) WorldEdit team and contributors
 *
 * This program 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, 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.sk89q.worldedit.blocks;

import java.util.HashMap;
import java.util.Map;

import com.sk89q.jnbt.ByteTag;
import com.sk89q.jnbt.CompoundTag;
import com.sk89q.jnbt.StringTag;
import com.sk89q.jnbt.Tag;
import com.sk89q.worldedit.world.DataException;

/**
 * A skull block.
 */
public class SkullBlock extends BaseBlock implements TileEntityBlock {

    private String owner = ""; // notchian
    private byte skullType; // stored here for block, in damage value for item
    private byte rot; // only matters if block data == 0x1 (on floor)

    /**
     * Construct the skull block with a default type of skelton.
     * @param data data value to set, controls placement
     */
    public SkullBlock(int data) {
        this(data, (byte) 0);
    }

    /**
     * Construct the skull block with a given type.
     * 0 - skeleton
     * 1 - wither skelly
     * 2 - zombie
     * 3 - human
     * 4 - creeper
     * @param data data value to set, controls placement
     * @param type type of skull
     */
    public SkullBlock(int data, byte type) {
        this(data, type, (byte) 0);
    }

    /**
     * Construct the skull block with a given type and rotation.
     * @param data data value to set, controls placement
     * @param type type of skull
     * @param rot rotation (if on floor)
     */
    public SkullBlock(int data, byte type, byte rot) {
        super(BlockID.HEAD, data);
        if (type < (byte) 0 || type > (byte) 4) {
            this.skullType = (byte) 0;
        } else {
            this.skullType = type;
        }
        this.rot = rot;
        this.owner = "";
    }

    /**
     * Construct the skull block with a given rotation and owner.
     * The type is assumed to be player unless owner is null or empty.
     * @param data data value to set, controls placement
     * @param rot rotation of skull
     * @param owner name of player
     */
    public SkullBlock(int data, byte rot, String owner) {
        super(BlockID.HEAD, data);
        this.rot = rot;
        this.setOwner(owner);
        if (owner == null || owner.isEmpty()) this.skullType = (byte) 0;
    }

    /**
     * Set the skull's owner. Automatically sets type to player if not empty or null.
     * @param owner player name to set the skull to
     */
    public void setOwner(String owner) {
        if (owner == null) {
            this.owner = "";
        } else {
            if (owner.length() > 16 || owner.isEmpty()) this.owner = "";
            else this.owner = owner;
        }
        if (this.owner != null && !this.owner.isEmpty()) this.skullType = (byte) 3;
    }

    /**
     * Get the skull's owner. Returns null if unset.
     * @return player name or null
     */
    public String getOwner() {
        return owner;
    }

    /**
     * Get the type of skull.
     * @return the skullType
     */
    public byte getSkullType() {
        return skullType;
    }

    /**
     * Set the type of skull;
     * @param skullType the skullType to set
     */
    public void setSkullType(byte skullType) {
        this.skullType = skullType;
    }

    /**
     * Get rotation of skull. This only means anything if the block data is 1.
     * @return the rotation
     */
    public byte getRot() {
        return rot;
    }

    /**
     * Set the rotation of skull.
     * @param rot the rotation to set
     */
    public void setRot(byte rot) {
        this.rot = rot;
    }

    @Override
    public boolean hasNbtData() {
        return true;
    }

    @Override
    public String getNbtId() {
        return "Skull";
    }

    @Override
    public CompoundTag getNbtData() {
        Map<String, Tag> values = new HashMap<String, Tag>();
        values.put("SkullType", new ByteTag("SkullType", skullType));
        if (owner == null) owner = "";
        values.put("ExtraType", new StringTag("ExtraType", owner));
        values.put("Rot", new ByteTag("Rot", rot));
        return new CompoundTag(getNbtId(), values);
    }

    @Override
    public void setNbtData(CompoundTag rootTag) throws DataException {
        if (rootTag == null) {
            return;
        }

        Map<String, Tag> values = rootTag.getValue();

        Tag t;

        t = values.get("id");
        if (!(t instanceof StringTag)
                || !((StringTag) t).getValue().equals("Skull")) {
            throw new DataException("'Skull' tile entity expected");
        }

        t = values.get("SkullType");
        if (t instanceof ByteTag) {
            skullType = ((ByteTag) t).getValue();
        }
        t = values.get("ExtraType");
        if (t != null && t instanceof StringTag) {
            owner = ((StringTag) t).getValue();
        }
        t = values.get("Rot");
        if (t instanceof ByteTag) {
            rot = ((ByteTag) t).getValue();
        }
    }
}