var Entity = Java.type('net.minestom.server.entity.Entity');
var Pos = Java.type('net.minestom.server.coordinate.Pos');
var Vec = Java.type('net.minestom.server.coordinate.Vec');
var Component = Java.type('net.kyori.adventure.text.Component');
var NamedTextColor = Java.type('net.kyori.adventure.text.format.NamedTextColor');
var BillboardConstraints = Java.type('net.minestom.server.entity.metadata.display.AbstractDisplayMeta.BillboardConstraints');
var MinecraftServer = Java.type('net.minestom.server.MinecraftServer');
var MiniMessage = Java.type('net.kyori.adventure.text.minimessage.MiniMessage');

server.log("NPC Text script initializing...");

const pos = [
    [49.5, 63, -75.5],
    [35.5, 63, -75.5],
    [48.5, 63, -70.5],
    [36.5, 63, -70.5],
    [47.5, 63, -65.5],
    [37.5, 63, -65.5],
    [42.5, 63, -64.5]
];

const text = [
    "<#bb00ff>&lGHAST &r&7(1.21+)",
    "&7idk",
    "&7",
    "<#bb00ff>⏩ Line 1",
    "<#bb00ff>⏩ Line 2",
    "&7",
    "&7(Click me to join <#bb00ff>&n0&r&7 others&r&7)"
];

// Join all lines with newline for the display
var fullDisplayText = text.join("\n");

// Run sequentially to prevent race conditions
function spawnNext(index) {
    if (index >= pos.length) {
        server.log("All NPCs spawned.");
        return;
    }
    
    var loc = pos[index];
    var x = loc[0];
    var y = loc[1];
    var z = loc[2];
    // Use the full text for every NPC
    var displayString = fullDisplayText;
    
    var instanceManager = MinecraftServer.getInstanceManager();
    var instances = instanceManager.getInstances();
    
    if (instances.isEmpty()) {
        server.log("No instances found!");
        return;
    }
    var instance = instances.iterator().next();
    var position = new Pos(x, y, z);

    // Retrieve EntityTypes
    var HUSK = server.getEntityType('HUSK');
    var TEXT_DISPLAY = server.getEntityType('TEXT_DISPLAY');

    // 1. Create the "NPC" (Host)
    var npc = new Entity(HUSK);
    npc.setNoGravity(true);
    
    // 2. Create the TextDisplay (Passenger)
    var textDisplay = new Entity(TEXT_DISPLAY);
    textDisplay.setNoGravity(true); // Ensure text doesn't fall
    var meta = textDisplay.getEntityMeta();
    
    meta.setText(MiniMessage.miniMessage().deserialize(displayString));
    meta.setBillboardRenderConstraints(BillboardConstraints.CENTER);
    meta.setScale(new Vec(1.0, 1.0, 1.0));
    meta.setBackgroundColor(0); 

    // 3. Spawn entities
    server.log("Spawning NPC " + (index + 1) + "/" + pos.length + " at " + x + "," + y + "," + z + "...");
    
    npc.setInstance(instance, position).thenAccept(function() {
        textDisplay.setInstance(instance, position.add(0, 2.5, 0)).thenAccept(function() {
            try {
                npc.addPassenger(textDisplay);
                server.log("Successfully spawned NPC + Text at " + x + "," + y + "," + z);
            } catch (e) {
                server.log("Error adding passenger: " + e);
            }
            // Spawn next
            spawnNext(index + 1);
        }).exceptionally(function(e) {
            server.log("TextDisplay spawn failed: " + e);
            spawnNext(index + 1); // Continue anyway
            return null;
        });
    }).exceptionally(function(e) {
        server.log("NPC spawn failed: " + e);
        spawnNext(index + 1); // Continue anyway
        return null;
    });
}

try {
    spawnNext(0);
} catch (e) {
    server.log("Error starting spawn loop: " + e);
}