package dev.loki.loparkour.ghost;

import dev.lolib.scheduler.Scheduler;
import dev.lolib.scheduler.ScheduledTask;
import dev.loki.loparkour.LoParkour;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.entity.ArmorStand;
import org.bukkit.entity.EntityType;
import org.jetbrains.annotations.NotNull;

/**
 * Spawns and animates an ArmorStand that replays a {@link GhostData} run.
 *
 * <p>Bugs fixed vs original:
 * <ul>
 *   <li>Duplicate import of {@code dev.lolib.scheduler.Scheduler} — removed.</li>
 *   <li>Duplicate field declaration {@code dev.lolib.scheduler.ScheduledTask task}
 *       shadowed the already-imported type — removed the fully-qualified duplicate.</li>
 * </ul>
 */
public class GhostPlayer {

    private final GhostData data;
    private final World world;
    private ArmorStand entity;
    private ScheduledTask task;
    private int currentFrame = 0;
    private long startTime;

    public GhostPlayer(@NotNull GhostData data, @NotNull World world) {
        this.data  = data;
        this.world = world;
    }

    public void spawn(@NotNull Location startLocation) {
        if (data.getFrames().isEmpty()) return;

        entity = (ArmorStand) world.spawnEntity(startLocation, EntityType.ARMOR_STAND);
        entity.setVisible(false);
        entity.setGravity(false);
        entity.setInvulnerable(true);
        entity.setCustomName("§7" + data.getPlayerName() + " §8(Ghost)");
        entity.setCustomNameVisible(true);

        startTime    = System.currentTimeMillis();
        currentFrame = 0;

        task = Scheduler.get(LoParkour.getPlugin()).runTimer(this::update, 0, 1);
    }

    private void update() {
        if (entity == null || !entity.isValid()) {
            stop();
            return;
        }

        long elapsed = System.currentTimeMillis() - startTime;

        while (currentFrame < data.getFrames().size()) {
            GhostFrame frame = data.getFrames().get(currentFrame);
            if (frame.getTimestamp() > elapsed) break;
            entity.teleport(frame.toLocation(world));
            currentFrame++;
        }

        if (currentFrame >= data.getFrames().size()) stop();
    }

    public void stop() {
        if (task != null)   { task.cancel();    task   = null; }
        if (entity != null) { entity.remove();  entity = null; }
    }

    public boolean isActive()     { return entity != null && entity.isValid(); }
    public String getPlayerName() { return data.getPlayerName(); }
    public int getScore()         { return data.getScore(); }
}