package net.scopenet.integration;

import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

/** Sends live player positions to the panel for the in-app BlueMap territory view. */
public final class LiveMapSync implements AutoCloseable {
    public record Player(String uuid, String name, String dimension, double x, double y, double z, float yaw, float pitch) {}

    private final PanelClient client;
    private final ScheduledExecutorService worker = Executors.newSingleThreadScheduledExecutor(task -> {
        Thread thread = new Thread(task, "scopenet-positions");
        thread.setDaemon(true);
        return thread;
    });
    private volatile List<Player> players = List.of();
    private volatile boolean changed;
    private volatile boolean closed;
    private long lastSent;

    public LiveMapSync(PanelClient client) { this.client = client; }

    public void start() { worker.scheduleWithFixedDelay(this::sendSafely, 1, 1, TimeUnit.SECONDS); }

    public void offerPlayers(List<Player> next) {
        if (!next.equals(players)) {
            players = List.copyOf(next);
            changed = true;
        }
    }

    private void sendSafely() {
        if (closed) return;
        long now = System.nanoTime();
        if (!changed && now - lastSent < TimeUnit.SECONDS.toNanos(10)) return;
        JsonArray list = new JsonArray();
        for (Player p : players) {
            JsonObject entry = new JsonObject();
            entry.addProperty("uuid", p.uuid());
            entry.addProperty("name", p.name());
            entry.addProperty("dimension", p.dimension());
            entry.addProperty("x", p.x());
            entry.addProperty("y", p.y());
            entry.addProperty("z", p.z());
            entry.addProperty("yaw", p.yaw());
            entry.addProperty("pitch", p.pitch());
            list.add(entry);
        }
        JsonObject body = new JsonObject();
        body.add("players", list);
        try {
            client.post("livemap/players", body);
            changed = false;
            lastSent = now;
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        } catch (Exception ignored) {
            // Keep the latest snapshot and retry on the next interval.
        }
    }

    @Override public void close() {
        closed = true;
        worker.shutdownNow();
    }
}