package pptest;

import eu.mhsl.minecraft.pixelpics.Main;
import eu.mhsl.minecraft.pixelpics.render.render.DefaultScreenRenderer;
import eu.mhsl.minecraft.pixelpics.render.render.RenderJob;
import eu.mhsl.minecraft.pixelpics.render.render.Resolution;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.*;
import java.util.function.Consumer;
import javax.imageio.ImageIO;
import net.kyori.adventure.text.Component;
import net.kyori.adventure.text.format.NamedTextColor;
import org.bukkit.*;
import org.bukkit.block.Block;
import org.bukkit.block.data.BlockData;
import org.bukkit.block.data.type.Bed;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.*;
import org.bukkit.inventory.EquipmentSlot;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.util.Transformation;
import org.bukkit.util.Vector;
import org.joml.AxisAngle4f;
import org.joml.Quaternionf;
import org.joml.Vector3f;

/** Test-only plugin: builds edge-case scenes and renders them through PixelPics into PNGs. */
public class PPTest extends JavaPlugin {

    record Scene(String name, Consumer<Location> build, double camX, double camY, double camZ, double lookX, double lookY, double lookZ) {}

    private final Map<String, Scene> scenes = new LinkedHashMap<>();
    private World w;

    @Override
    public void onEnable() {
        // Each scene sits on its own stone platform; the camera is placed relative to the platform origin.
        scenes.put("held", new Scene("held", this::held, 4.4, 2.6, -8.5, 4.4, 1.0, 1));
        scenes.put("equip", new Scene("equip", this::equip, 4, 3, -8.5, 4, 1.0, 1.5));
        scenes.put("riding", new Scene("riding", this::riding, 5, 3, -7.5, 5, 1.2, 1));
        scenes.put("leash", new Scene("leash", this::leash, 5, 4, -9, 5, 2.5, 2));
        scenes.put("displays", new Scene("displays", this::displays, 5, 3, -9, 5, 1.0, 1.5));
        scenes.put("pixelblock", new Scene("pixelblock", this::pixelblock, 1.5, 1.9, -1.3, 0.5, 0.5, 0.5));
        scenes.put("misc", new Scene("misc", this::misc, 5, 3, -7, 5, 0.8, 1.5));
        scenes.put("dbg", new Scene("dbg", this::dbg, 1, 1.6, -3, 1, 0.8, 0.5));
        scenes.put("shelf", new Scene("shelf", this::shelf, 3.5, 3.2, -2.5, 0.5, 1.5, 0.5));
        scenes.put("shelftop", new Scene("shelftop", this::shelf, 0.52, 6, 0.5, 0.5, 0, 0.5));
        scenes.put("rotated", new Scene("rotated", this::rotated, 3, 4.5, -4, 3, 0.5, 2));
        scenes.put("rotated2", new Scene("rotated2", this::rotated, -0.5, 3.5, 9.5, -0.5, 0.5, 5));
        scenes.put("redstone", new Scene("redstone", this::redstone, 3, 3, -3, 3, 0, 2));
        scenes.put("piston", new Scene("piston", this::piston, 4.5, 3.2, -3.5, 5, 1, 1));
        scenes.put("pistonback", new Scene("pistonback", this::piston, 5.5, 3.2, 5.5, 5, 1, 1));
        scenes.put("pistondown", new Scene("pistondown", this::piston, -1.6, 2.6, -1.6, 0.5, 1.4, 0.5));
        scenes.put("pistonup", new Scene("pistonup", this::piston, 0.4, 2.6, -1.6, 2.5, 1.4, 0.5));
        scenes.put("vehicles", new Scene("vehicles", this::vehicles, 5, 3, -7, 5, 0.6, 1.5));
    }

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        w = Bukkit.getWorlds().getFirst();
        w.setTime(6000);
        w.setStorm(false);
        List<String> todo = args.length == 0 || args[0].equals("all") ? new ArrayList<>(scenes.keySet()) : List.of(args);
        int i = 0;
        for (String n : todo) {
            Scene sc = scenes.get(n);
            if (sc == null) { getLogger().warning("unknown scene " + n); continue; }
            int idx = new ArrayList<>(scenes.keySet()).indexOf(n);
            Location origin = new Location(w, 5000 + idx * 64, 200, 5000);
            Bukkit.getScheduler().runTaskLater(this, () -> run(sc, origin), 1 + i * 60L);
            i++;
        }
        return true;
    }

    private void run(Scene sc, Location o) {
        try {
            prepareArea(o);
            sc.build.accept(o.clone());
        } catch (Throwable t) {
            getLogger().severe("build " + sc.name + " failed: " + t);
            t.printStackTrace();
        }
        // Let one tick pass (passengers/leashes settle), then render.
        Bukkit.getScheduler().runTaskLater(this, () -> render(sc, o), 10);
    }

    private void render(Scene sc, Location o) {
        DefaultScreenRenderer r = Main.getInstance().getScreenRenderer();
        Location eye = o.clone().add(sc.camX, sc.camY, sc.camZ);
        Vector look = o.clone().add(sc.lookX, sc.lookY, sc.lookZ).toVector().subtract(eye.toVector());
        eye.setDirection(look);
        RenderJob job = r.prepare(eye, new Resolution(480, 320), null);
        if (sc.name.equals("dbg")) {
            try {
                java.lang.reflect.Field f = DefaultScreenRenderer.class.getDeclaredField("objectBaker");
                f.setAccessible(true);
                var ob = (eu.mhsl.minecraft.pixelpics.render.entity.ObjectBaker) f.get(r);
                for (var st : job.objects()) {
                    double[] pos = st.toWorld().t;
                    if (Math.abs(pos[0] - o.getX()) > 5 || Math.abs(pos[2] - o.getZ()) > 5) continue;
                    try {
                        var re = ob.bake(st);
                        getLogger().info("dbg obj " + st.kind() + " item=" + st.item() + " ctx=" + st.context() + " -> "
                                + (re == null ? "null" : re.cubes.size() + " cubes " + java.util.Arrays.toString(re.aabbMin)));
                    } catch (Throwable t) {
                        getLogger().warning("dbg bake failed: " + t);
                        t.printStackTrace();
                    }
                }
            } catch (Throwable t) {
                getLogger().warning("dbg: " + t);
            }
        }
        getLogger().info("scene " + sc.name + ": " + job.entities().size() + " entities, " + job.objects().size()
                + " objects, " + job.blockEntities().size() + " block entities");
        Bukkit.getScheduler().runTaskAsynchronously(this, () -> {
            try {
                BufferedImage img = r.execute(job);
                File f = new File(getDataFolder(), sc.name + ".png");
                f.getParentFile().mkdirs();
                ImageIO.write(img, "png", f);
                getLogger().info("WROTE " + f);
            } catch (Throwable t) {
                getLogger().severe("render " + sc.name + " failed: " + t);
                t.printStackTrace();
            }
        });
    }

    /** Clears the area (entities + blocks) and lays a 14x14 stone floor at the origin's y-1. */
    private void prepareArea(Location o) {
        for (int cx = -1; cx <= 2; cx++)
            for (int cz = -2; cz <= 2; cz++) {
                Chunk c = w.getChunkAt((o.getBlockX() >> 4) + cx, (o.getBlockZ() >> 4) + cz);
                c.load(true);
                c.addPluginChunkTicket(this);
            }
        for (Entity e : w.getNearbyEntities(o.clone().add(6, 5, 2), 20, 20, 20)) if (!(e instanceof Player)) e.remove();
        for (int x = -6; x < 18; x++)
            for (int z = -12; z < 12; z++)
                for (int y = -1; y < 12; y++)
                    w.getBlockAt(o.getBlockX() + x, o.getBlockY() + y, o.getBlockZ() + z)
                            .setType(y == -1 ? Material.SMOOTH_STONE : Material.AIR, false);
    }

    // --- helpers ---------------------------------------------------------------------------------

    private <T extends Entity> T spawn(Location o, double x, double y, double z, float yaw, Class<T> type) {
        Location l = o.clone().add(x, y, z);
        l.setYaw(yaw);
        T e = w.spawn(l, type, en -> {
            if (en instanceof Mob m) m.setAI(false);
            en.setPersistent(false);
        });
        if (e instanceof LivingEntity le) le.setRemoveWhenFarAway(false);
        return e;
    }

    private Entity spawn(Location o, double x, double y, double z, float yaw, EntityType type) {
        Location l = o.clone().add(x, y, z);
        l.setYaw(yaw);
        Entity e = w.spawnEntity(l, type);
        if (e instanceof Mob m) m.setAI(false);
        return e;
    }

    private static ItemStack it(Material m) {
        return new ItemStack(m);
    }

    private static void hands(Entity e, Material main, Material off) {
        if (!(e instanceof LivingEntity le) || le.getEquipment() == null) return;
        if (main != null) le.getEquipment().setItemInMainHand(it(main));
        if (off != null) le.getEquipment().setItemInOffHand(it(off));
    }

    // --- scenes ----------------------------------------------------------------------------------

    private void held(Location o) {
        hands(spawn(o, 0, 0, 0, 180, Zombie.class), Material.IRON_SWORD, Material.SHIELD);
        hands(spawn(o, 1.6, 0, 0, 180, Skeleton.class), Material.BOW, null);
        hands(spawn(o, 3.2, 0, 0, 180, Piglin.class), Material.GOLDEN_SWORD, null);
        hands(spawn(o, 4.8, 0, 0, 180, EntityType.MANNEQUIN), Material.DIAMOND_PICKAXE, Material.TORCH);
        ArmorStand as = spawn(o, 6.4, 0, 0, 180, ArmorStand.class);
        as.setArms(true);
        hands(as, Material.TRIDENT, Material.GRASS_BLOCK);
        hands(spawn(o, 8.0, 0, 0, 180, Drowned.class), Material.TRIDENT, null);
        hands(spawn(o, 0.8, 0, 2, 180, Pillager.class), Material.CROSSBOW, null);
        hands(spawn(o, 2.4, 0, 2, 180, Vindicator.class), Material.IRON_AXE, null);
        hands(spawn(o, 4.0, 0, 2, 180, Fox.class), Material.SWEET_BERRIES, null);
        hands(spawn(o, 5.6, 0.5, 2, 180, Allay.class), Material.DIAMOND, null);
        hands(spawn(o, 7.2, 0, 2, 180, Witch.class), Material.POTION, null);
        hands(spawn(o, 8.8, 0, 2, 180, Villager.class), Material.EMERALD, null);
    }

    private void equip(Location o) {
        LivingEntity m = (LivingEntity) spawn(o, 0, 0, 0, 180, EntityType.MANNEQUIN);
        m.getEquipment().setChestplate(it(Material.ELYTRA));
        m.getEquipment().setHelmet(it(Material.IRON_HELMET));
        LivingEntity m2 = (LivingEntity) spawn(o, 1.6, 0, 0, 0, EntityType.MANNEQUIN); // back view: elytra
        m2.getEquipment().setChestplate(it(Material.ELYTRA));
        ArmorStand pumpkin = spawn(o, 3.2, 0, 0, 180, ArmorStand.class);
        pumpkin.getEquipment().setHelmet(it(Material.CARVED_PUMPKIN));
        pumpkin.getEquipment().setChestplate(it(Material.CHAINMAIL_CHESTPLATE));
        ArmorStand head = spawn(o, 4.8, 0, 0, 180, ArmorStand.class);
        head.getEquipment().setHelmet(it(Material.CREEPER_HEAD));
        head.setInvisible(true);
        Zombie z = spawn(o, 6.4, 0, 0, 180, Zombie.class);
        z.getEquipment().setHelmet(it(Material.GOLDEN_HELMET));
        z.getEquipment().setChestplate(it(Material.COPPER_CHESTPLATE));
        z.getEquipment().setLeggings(it(Material.NETHERITE_LEGGINGS));
        z.getEquipment().setBoots(it(Material.LEATHER_BOOTS));
        spawn(o, 8.0, 0, 0, 180, Snowman.class);
        Wolf wolf = spawn(o, 1, 0, 2.5, 180, Wolf.class);
        wolf.getEquipment().setItem(EquipmentSlot.BODY, it(Material.WOLF_ARMOR));
        Horse h = spawn(o, 4, 0, 3, 90, Horse.class);
        h.getInventory().setSaddle(it(Material.SADDLE));
        h.getInventory().setArmor(it(Material.GOLDEN_HORSE_ARMOR));
        Zombie baby = spawn(o, 7.5, 0, 2.5, 180, Zombie.class);
        baby.setBaby();
        baby.getEquipment().setHelmet(it(Material.DIAMOND_HELMET));
        hands(baby, Material.STONE_SWORD, null);
    }

    private void riding(Location o) {
        Spider sp = spawn(o, 0, 0, 0, 180, Spider.class);
        sp.addPassenger(spawn(o, 0, 1, 0, 180, Skeleton.class));
        Chicken ch = spawn(o, 2, 0, 0, 180, Chicken.class);
        Zombie bz = spawn(o, 2, 1, 0, 180, Zombie.class);
        bz.setBaby();
        ch.addPassenger(bz);
        Horse h = spawn(o, 4.5, 0, 0.5, 180, Horse.class);
        h.getInventory().setSaddle(it(Material.SADDLE));
        h.addPassenger(spawn(o, 4.5, 2, 0.5, 180, EntityType.MANNEQUIN));
        Minecart mc = spawn(o, 7, 0, 0, 0, Minecart.class);
        mc.addPassenger(spawn(o, 7, 1, 0, 180, Villager.class));
        Boat b = (Boat) spawn(o, 9.5, 0, 0, 180, EntityType.OAK_BOAT);
        b.addPassenger(spawn(o, 9.5, 1, 0, 180, Zombie.class));
        b.addPassenger(spawn(o, 9.5, 1, 0, 180, Pig.class));
        Camel c = spawn(o, 2, 0, 3.5, 90, Camel.class);
        c.getInventory().setSaddle(it(Material.SADDLE));
        c.addPassenger(spawn(o, 2, 2, 3.5, 90, EntityType.MANNEQUIN));
        c.addPassenger(spawn(o, 2, 2, 3.5, 90, Villager.class));
        Strider st = spawn(o, 6, 0, 3.5, 180, Strider.class);
        st.setSaddle(true);
        st.addPassenger(spawn(o, 6, 2, 3.5, 180, Piglin.class));
        Boat cb = (Boat) spawn(o, 9, 0, 3.5, 180, EntityType.BIRCH_CHEST_BOAT);
        cb.addPassenger(spawn(o, 9, 1, 3.5, 180, EntityType.MANNEQUIN));
    }

    private void leash(Location o) {
        Block fence = o.clone().add(0, 0, 0).getBlock();
        fence.setType(Material.OAK_FENCE);
        LeashHitch knot = w.spawn(fence.getLocation(), LeashHitch.class);
        Cow cow = spawn(o, 2.5, 0, 0.5, 180, Cow.class);
        cow.setLeashHolder(knot);
        LivingEntity holder = (LivingEntity) spawn(o, 5, 0, 0, 180, EntityType.MANNEQUIN);
        Wolf wolf = spawn(o, 7, 0, 0.5, 180, Wolf.class);
        wolf.setLeashHolder(holder);
        HappyGhast g = spawn(o, 4, 4, 5, 180, HappyGhast.class);
        g.getEquipment().setItem(EquipmentSlot.BODY, it(Material.BLUE_HARNESS));
        Boat boat = (Boat) spawn(o, 4, 0, 4, 180, EntityType.OAK_BOAT);
        try {
            boat.getClass().getMethod("setLeashHolder", Entity.class).invoke(boat, g);
        } catch (Throwable t) {
            getLogger().warning("boat not leashable: " + t);
        }
        Llama l1 = spawn(o, 9, 0, 2, 180, Llama.class);
        Llama l2 = spawn(o, 10.5, 0, 3.5, 180, Llama.class);
        l2.setLeashHolder(l1);
        l1.getInventory().setDecor(it(Material.RED_CARPET));
        l1.setCarryingChest(true);
    }

    private void displays(Location o) {
        // Text displays: default background, coloured + shadowed + billboard center, multi-line wrapped.
        TextDisplay t1 = spawn(o, 0.5, 1.5, 0, 0, TextDisplay.class);
        t1.text(Component.text("Default Text"));
        TextDisplay t2 = spawn(o, 2.5, 1.5, 0, 0, TextDisplay.class);
        t2.text(Component.text("Billboard CENTER", NamedTextColor.GOLD));
        t2.setBillboard(Display.Billboard.CENTER);
        t2.setShadowed(true);
        t2.setBackgroundColor(Color.fromARGB(255, 30, 30, 90));
        TextDisplay t3 = spawn(o, 5, 1.5, 0, 180, TextDisplay.class);
        t3.text(Component.text("Dies ist ein langer Text, der umgebrochen werden sollte weil er breit ist"));
        t3.setLineWidth(80);
        // Item displays.
        ItemDisplay i1 = spawn(o, 7, 1, 0, 0, ItemDisplay.class);
        i1.setItemStack(it(Material.DIAMOND_SWORD));
        i1.setTransformation(new Transformation(new Vector3f(), new AxisAngle4f((float) Math.toRadians(45), 0, 0, 1),
                new Vector3f(1, 1, 1), new AxisAngle4f()));
        ItemDisplay i2 = spawn(o, 8.5, 0.5, 0, 30, ItemDisplay.class);
        i2.setItemStack(it(Material.CHEST));
        ItemDisplay i3 = spawn(o, 0.5, 0.5, 2.5, 0, ItemDisplay.class);
        i3.setItemStack(it(Material.PLAYER_HEAD));
        ItemDisplay i4 = spawn(o, 2, 0.5, 2.5, 0, ItemDisplay.class);
        i4.setItemStack(it(Material.SHIELD));
        // Block displays: rotated stairs, scaled chest (block entity!), banner, bed, glass.
        BlockDisplay b1 = spawn(o, 3.5, 0, 2.5, 0, BlockDisplay.class);
        b1.setBlock(Bukkit.createBlockData("minecraft:oak_stairs[facing=east]"));
        b1.setTransformation(new Transformation(new Vector3f(), new Quaternionf().rotateY(0.6f), new Vector3f(0.8f), new Quaternionf()));
        BlockDisplay b2 = spawn(o, 5, 0, 2.5, 0, BlockDisplay.class);
        b2.setBlock(Bukkit.createBlockData("minecraft:chest[facing=north]"));
        BlockDisplay b3 = spawn(o, 6.5, 0, 2.5, 0, BlockDisplay.class);
        b3.setBlock(Bukkit.createBlockData("minecraft:red_banner"));
        BlockDisplay b4 = spawn(o, 8, 0, 2.5, 0, BlockDisplay.class);
        b4.setBlock(Bukkit.createBlockData("minecraft:light_blue_stained_glass"));
        BlockDisplay b5 = spawn(o, 9.5, 0, 2.5, 0, BlockDisplay.class);
        b5.setBlock(Bukkit.createBlockData("minecraft:oak_sign"));
    }

    /** Mimics PixelBlocks: 1/16-scaled block displays forming a mini build + the placeholder displays. */
    private void pixelblock(Location o) {
        float s = 1 / 16f;
        String[] palette = {"minecraft:oak_planks", "minecraft:stone_bricks", "minecraft:glass", "minecraft:red_wool",
            "minecraft:chest[facing=north]", "minecraft:red_bed[part=head,facing=north]", "minecraft:oak_stairs[facing=south]",
            "minecraft:torch", "minecraft:grass_block"};
        Random rnd = new Random(1);
        for (int x = 0; x < 16; x++)
            for (int z = 0; z < 16; z++) {
                int h = 1 + (int) (3 * Math.abs(Math.sin(x * 0.4) * Math.cos(z * 0.3)));
                for (int y = 0; y < h; y++) {
                    String b = y == h - 1 ? palette[rnd.nextInt(palette.length)] : "minecraft:stone_bricks";
                    pixel(o, x, y, z, s, Bukkit.createBlockData(b));
                }
            }
        // Placeholder look (small pixel blocks): end-crystal item cores + glass container, next to it.
        Location p = o.clone().add(-1.5, 0.5, 0.5);
        for (int i = 0; i <= 90; i += 90) {
            ItemDisplay core = w.spawn(p, ItemDisplay.class);
            core.setRotation(i, 0);
            core.setItemStack(it(Material.END_CRYSTAL));
            Transformation t = core.getTransformation();
            t.getScale().set(0.5);
            core.setTransformation(t);
        }
        ItemDisplay glass = w.spawn(p, ItemDisplay.class);
        glass.setItemStack(it(Material.WHITE_STAINED_GLASS));
        Interaction hit = w.spawn(o.clone().add(0.5, 0, 0.5), Interaction.class);
        hit.setInteractionWidth(1);
        hit.setInteractionHeight(1);
    }

    private void pixel(Location o, int x, int y, int z, float s, BlockData data) {
        Location l = o.clone().add(x * s + s / 2, y * s + s / 2, z * s + s / 2);
        BlockDisplay d = w.spawn(l, BlockDisplay.class);
        d.setBlock(data);
        Transformation t = d.getTransformation();
        t.getScale().set(s);
        t.getTranslation().set(-s / 2, -s / 2, -s / 2);
        d.setTransformation(t);
    }

    private void misc(Location o) {
        w.dropItem(o.clone().add(0, 0.2, 0), it(Material.DIAMOND_SWORD), i -> i.setVelocity(new Vector()));
        w.dropItem(o.clone().add(1, 0.2, 0), it(Material.OAK_LOG), i -> i.setVelocity(new Vector()));
        w.dropItem(o.clone().add(2, 0.2, 0), new ItemStack(Material.COBBLESTONE, 32), i -> i.setVelocity(new Vector()));
        w.dropItem(o.clone().add(3, 0.2, 0), it(Material.APPLE), i -> i.setVelocity(new Vector()));
        FallingBlock fb = w.spawn(o.clone().add(4.5, 0.5, 0.5), FallingBlock.class, f -> f.setGravity(false));
        fb.setBlockData(Bukkit.createBlockData("minecraft:sand"));
        TNTPrimed tnt = w.spawn(o.clone().add(6, 0, 0.5), TNTPrimed.class);
        tnt.setFuseTicks(10000);
        tnt.setGravity(false);
        w.spawn(o.clone().add(8, 0, 0.5), EnderCrystal.class);
        Sheep sh = spawn(o, 0.5, 0, 3, 180, Sheep.class);
        sh.setSheared(true);
        Sheep sh2 = spawn(o, 2.5, 0, 3, 180, Sheep.class);
        sh2.setColor(DyeColor.LIME);
        ArmorStand small = spawn(o, 4.5, 0, 3, 180, ArmorStand.class);
        small.setSmall(true);
        small.getEquipment().setHelmet(it(Material.LEATHER_HELMET));
        spawn(o, 6, 0, 3, 180, EntityType.EXPERIENCE_ORB);
        Arrow a = w.spawn(o.clone().add(7, 0.5, 3), Arrow.class, ar -> ar.setGravity(false));
        a.setVelocity(new Vector(1, -0.4, 0));
        Trident tr = w.spawn(o.clone().add(9, 0.5, 3), Trident.class, ar -> ar.setGravity(false));
        tr.setVelocity(new Vector(0, -1, 0.2));
        spawn(o, 10, 0, 0, 180, TropicalFish.class);
    }

    private void dbg(Location o) {
        TextDisplay t1 = spawn(o, 0, 1.2, 0, 0, TextDisplay.class);
        t1.text(Component.text("Default Text"));
        ItemDisplay i4 = spawn(o, 2, 0.5, 0.5, 0, ItemDisplay.class);
        i4.setItemStack(it(Material.SHIELD));
        getLogger().info("dbg text=" + t1.isValid() + " opacity=" + t1.getTextOpacity() + " shield=" + i4.getItemStack());
    }

    /** World blocks: a log column with shelf mushrooms (26.x) on all four sides, both growth stages. */
    private void shelf(Location o) {
        for (int y = 0; y < 3; y++) o.clone().add(0, y, 0).getBlock().setType(Material.OAK_LOG, false);
        o.clone().add(0, 0, -3).getBlock().setType(Material.DIAMOND_BLOCK, false); // north marker
        o.clone().add(3, 0, 0).getBlock().setType(Material.GOLD_BLOCK, false); // east marker
        String[] f = {"north", "south", "east", "west"};
        int[][] off = {{0, -1}, {0, 1}, {1, 0}, {-1, 0}};
        for (int i = 0; i < 4; i++) {
            for (int age = 0; age < 2; age++) {
                o.clone().add(off[i][0], 1 + age, off[i][1]).getBlock().setBlockData(
                        Bukkit.createBlockData("minecraft:shelf_mushroom[age=" + age + ",facing=" + f[i] + "]"), false);
            }
        }
    }

    /** Blockstate y-rotations: ladders, stairs, wall torches, furnaces, logs on all sides of stone pillars. */
    private void rotated(Location o) {
        String[] f = {"north", "south", "east", "west"};
        int[][] off = {{0, -1}, {0, 1}, {1, 0}, {-1, 0}};
        String[] kinds = {"ladder[facing=%s]", "wall_torch[facing=%s]", "oak_stairs[facing=%s]", "furnace[facing=%s]"};
        for (int k = 0; k < kinds.length; k++) {
            Location c = o.clone().add(k * 3 - 1, 0, 2);
            c.getBlock().setType(Material.STONE, false);
            c.clone().add(0, 1, 0).getBlock().setType(Material.STONE, false);
            for (int i = 0; i < 4; i++) {
                c.clone().add(off[i][0], k == 2 || k == 3 ? 0 : 1, off[i][1]).getBlock().setBlockData(
                        Bukkit.createBlockData("minecraft:" + String.format(kinds[k], f[i])), false);
            }
        }
        // Fence with a single connection to the east (stone post at +x), door facing east, chest-free check.
        o.clone().add(-3, 0, 5).getBlock().setBlockData(Bukkit.createBlockData("minecraft:oak_fence[east=true]"), false);
        o.clone().add(-2, 0, 5).getBlock().setType(Material.STONE, false);
        o.clone().add(1, 0, 5).getBlock().setBlockData(
                Bukkit.createBlockData("minecraft:oak_door[facing=east,half=lower,hinge=left,open=false]"), false);
        o.clone().add(1, 1, 5).getBlock().setBlockData(
                Bukkit.createBlockData("minecraft:oak_door[facing=east,half=upper,hinge=left,open=false]"), false);
        o.clone().add(9, 0, 2).getBlock().setBlockData(Bukkit.createBlockData("minecraft:oak_log[axis=x]"), false);
        o.clone().add(9, 0, 4).getBlock().setBlockData(Bukkit.createBlockData("minecraft:oak_log[axis=z]"), false);
    }

    /** Redstone wire (dot, line, corner, climbing a wall, powered/unpowered) next to glass and panes. */
    private void redstone(Location o) {
        java.util.function.BiConsumer<int[], String> put = (p, data) -> o.clone().add(p[0], p[1], p[2]).getBlock()
                .setBlockData(Bukkit.createBlockData("minecraft:" + data), false);
        put.accept(new int[] {0, 0, 0}, "redstone_wire[power=0]");
        for (int x = 1; x <= 4; x++) put.accept(new int[] {x, 0, 0}, "redstone_wire[east=side,west=side,power=" + (x * 3) + "]");
        put.accept(new int[] {5, 0, 0}, "redstone_wire[west=side,north=side,power=15]");
        put.accept(new int[] {5, 0, -1}, "redstone_wire[south=side,north=up,power=15]");
        put.accept(new int[] {5, 0, -2}, "stone");
        put.accept(new int[] {5, 1, -2}, "redstone_wire[south=side,power=15]");
        put.accept(new int[] {0, 0, 3}, "glass");
        put.accept(new int[] {1, 0, 3}, "red_stained_glass");
        put.accept(new int[] {2, 0, 3}, "glass_pane[east=true,west=false]");
        put.accept(new int[] {3, 0, 3}, "blue_stained_glass_pane[east=true,west=true]");
        put.accept(new int[] {4, 0, 3}, "blue_stained_glass_pane[west=true,north=true]");
    }

    /** x/y blockstate rotations without uvlock: pistons in all six directions, observers, dispensers, logs. */
    private void piston(Location o) {
        String[] f = {"down", "up", "north", "south", "east", "west"};
        for (int i = 0; i < f.length; i++) {
            o.clone().add(i * 2, 1, 0).getBlock().setBlockData(
                    Bukkit.createBlockData("minecraft:piston[facing=" + f[i] + ",extended=false]"), false);
            o.clone().add(i * 2, 1, 2).getBlock().setBlockData(
                    Bukkit.createBlockData("minecraft:observer[facing=" + f[i] + "]"), false);
            o.clone().add(i * 2, 0, 2).getBlock().setBlockData(
                    Bukkit.createBlockData("minecraft:dispenser[facing=" + f[i] + "]"), false);
        }
        o.clone().add(0, 0, -2).getBlock().setBlockData(Bukkit.createBlockData("minecraft:oak_log[axis=x]"), false);
        o.clone().add(2, 0, -2).getBlock().setBlockData(Bukkit.createBlockData("minecraft:oak_log[axis=z]"), false);
        o.clone().add(4, 0, -2).getBlock().setBlockData(Bukkit.createBlockData("minecraft:furnace[facing=north]"), false);
    }

    private void vehicles(Location o) {
        spawn(o, 0, 0, 0, 0, EntityType.CHEST_MINECART);
        spawn(o, 1.8, 0, 0, 90, EntityType.FURNACE_MINECART);
        spawn(o, 3.6, 0, 0, 0, EntityType.HOPPER_MINECART);
        spawn(o, 5.4, 0, 0, 0, EntityType.TNT_MINECART);
        spawn(o, 7.2, 0, 0, 0, EntityType.SPAWNER_MINECART);
        spawn(o, 9, 0, 0, 0, EntityType.COMMAND_BLOCK_MINECART);
        spawn(o, 0.5, 0, 3, 30, EntityType.PALE_OAK_BOAT);
        spawn(o, 3, 0, 3, 60, EntityType.BAMBOO_CHEST_RAFT);
        spawn(o, 6, 0, 3, 90, EntityType.CHERRY_CHEST_BOAT);
        spawn(o, 9, 0, 3, 120, EntityType.MANGROVE_BOAT);
    }
}