fillflowersv1

import com.sk89q.worldedit.bukkit.WorldEditPlugin;
import com.sk89q.worldedit.bukkit.selections.Selection;
import net.menoni.rd.Debugger;
import net.menoni.rd.RuntimeDebugger;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.block.Block;
import org.bukkit.block.BlockFace;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class FillFlowers implements Debugger {

    private static List<Blocky> flowerList;
    private static Random random;

    private static class Blocky {
        private Material material;
        private byte data;
        private int height;
        private int weight;

        public Blocky(Material material, int weight) {
            this(material, (byte) 0, weight);
        }

        public Blocky(Material material, int data, int weight) {
            this(material, data, 1, weight);
        }

        public Blocky(Material material, int data, int height, int weight) {
            this.material = material;
            this.height = height;
            this.data = (byte) data;
            this.weight = weight;
        }

        public int getHeight() {
            return height;
        }

        public Material getMaterial() {
            return material;
        }

        public byte getData() {
            return data;
        }

        public int getWeight() {
            return this.weight;
        }

    }

    static {
        random = new SecureRandom();
        flowerList = new ArrayList<>();
        flowerList.add(new Blocky(Material.YELLOW_FLOWER, 1));
        flowerList.add(new Blocky(Material.LONG_GRASS, 1, 5));
        flowerList.add(new Blocky(Material.LONG_GRASS, 2, 5));
        flowerList.add(new Blocky(Material.RED_ROSE, 0, 1));
        flowerList.add(new Blocky(Material.RED_ROSE, 1, 1));
        flowerList.add(new Blocky(Material.RED_ROSE, 2, 1));
        flowerList.add(new Blocky(Material.RED_ROSE, 3, 1));
        flowerList.add(new Blocky(Material.RED_ROSE, 4, 1));
        flowerList.add(new Blocky(Material.RED_ROSE, 5, 1));
        flowerList.add(new Blocky(Material.RED_ROSE, 6, 1));
        flowerList.add(new Blocky(Material.RED_ROSE, 7, 1));
        flowerList.add(new Blocky(Material.RED_ROSE, 8, 1));
        flowerList.add(new Blocky(Material.DOUBLE_PLANT, 0, 2, 1));
        flowerList.add(new Blocky(Material.DOUBLE_PLANT, 1, 2, 1));
        flowerList.add(new Blocky(Material.DOUBLE_PLANT, 4, 2, 1));
        flowerList.add(new Blocky(Material.DOUBLE_PLANT, 5, 2, 1));
    }

    @Override
    public void debug(RuntimeDebugger runtimeDebugger, CommandSender commandSender) {
        if (!(commandSender instanceof Player)) {
            commandSender.sendMessage("Only players can run this script.");
            return;
        }
        Player player = (Player) commandSender;
        WorldEditPlugin worldEdit = (WorldEditPlugin) Bukkit.getServer().getPluginManager().getPlugin("WorldEdit");
        if (worldEdit == null) {
            player.sendMessage("Unable to indicate WorldEdit plugin presence...");
            return;
        }
        Selection selection = worldEdit.getSelection(player);
        if (selection == null) {
            player.sendMessage("You need to make a selection with worldedit first");
            return;
        }
        World world = selection.getWorld();
        Location min = selection.getMinimumPoint();
        Location max = selection.getMaximumPoint();
        int placed = 0;
        player.sendMessage("Starting flower placement...");
        for (int x = min.getBlockX(); x <= max.getBlockX(); x++) {
            for (int y = min.getBlockY(); y <= max.getBlockY(); y++) {
                for (int z = min.getBlockZ(); z <= max.getBlockZ(); z++) {
                    Block block = world.getBlockAt(x, y, z);
                    if (block == null) {
                        continue;
                    }
                    if (block.getType() != Material.GRASS) {
                        continue;
                    }
                    Block oneUp = block.getRelative(BlockFace.UP, 1);
                    Block twoUp = block.getRelative(BlockFace.UP, 2);
                    if (!((oneUp == null || oneUp.getType() == Material.AIR) && (twoUp == null || twoUp.getType() == Material.AIR))) {
                        continue;
                    }
                    placeRandomFlower(oneUp);
                    placed++;
                }
            }
        }
        player.sendMessage("Placed " + placed + " flowers!");
    }

    public Blocky getRandomFlower() {
        Blocky res = null;
        int totalWeight = 0;
        for (Blocky blocky : flowerList) {
            totalWeight += blocky.getWeight();
        }
        while (res == null) {
            int index = random.nextInt(totalWeight);
            for (Blocky blocky : flowerList) {
                index -= blocky.getWeight();
                if (index <= 0) {
                    res = blocky;
                    break;
                }
            }
        }
        return res;
    }

    public void placeRandomFlower(Block airBlock) {
        if (random.nextBoolean()) {
            return;
        }
        Blocky flower = getRandomFlower();
        airBlock.setType(flower.getMaterial());
        airBlock.setData(flower.getData());
        if (flower.getHeight() > 1) {
            Block up = airBlock.getRelative(BlockFace.UP);
            up.setType(flower.getMaterial());
            up.setData((byte) 8);
        }
    }

}