Gun

package gun;

import net.risingworld.api.Plugin;
import net.risingworld.api.Timer;
import net.risingworld.api.World;
import net.risingworld.api.events.EventMethod;
import net.risingworld.api.events.Listener;
import net.risingworld.api.events.player.PlayerCommandEvent;
import net.risingworld.api.events.player.PlayerConnectEvent;
import net.risingworld.api.events.player.PlayerMouseButtonEvent;
import net.risingworld.api.objects.Npc;
import net.risingworld.api.objects.Player;
import net.risingworld.api.utils.Layer;
import net.risingworld.api.utils.MouseButton;
import net.risingworld.api.utils.Quaternion;
import net.risingworld.api.utils.RaycastResult;
import net.risingworld.api.utils.Vector3f;

/**
 * A plugin that adds a "Gun" feature, allowing players to toggle a gun mode and shoot using mouse clicks.
 * Right-click triggers explosions, and left-click damages NPCs or triggers small explosions.
 * 
 * @author yahgi
 */
public class Gun extends Plugin implements Listener {
    // Instance variables for plugin components
    private Plugin plugin;
    private Timer timer;

    /**
     * Called when the plugin is enabled. Registers the event listener for this plugin.
     */
    @Override
    public void onEnable() {
        registerEventListener(this);
    }

    /**
     * Called when the plugin is disabled. Currently does nothing.
     */
    @Override
    public void onDisable() {
        // No cleanup required
    }

    /**
     * Handles the PlayerConnectEvent when a player connects to the server.
     * Initializes the "Gun" attribute for the player to false.
     * 
     * @param event The PlayerConnectEvent containing the player information
     */
    @EventMethod
    public void onPlayerConnect(PlayerConnectEvent event)  {
        Player player = event.getPlayer();
        player.setAttribute("Gun", false);
    }

    /**
     * Handles the PlayerMouseButtonEvent for mouse click interactions.
     * Right-click triggers an explosion if the gun is enabled.
     * Left-click performs continuous raycasting to damage NPCs or trigger small explosions.
     * 
     * @param event The PlayerMouseButtonEvent containing mouse click details
     */
    @EventMethod
    public void onPlayerMouseButtonEvent(PlayerMouseButtonEvent event) {
        Player player = event.getPlayer();
        MouseButton clicked = event.getButton();

        // Handle right-click (explosion trigger)
        if (event.isPressed() && clicked == MouseButton.Right) {
            if (Boolean.TRUE.equals(player.getAttribute("Gun"))) {
                // Define collision layers for raycasting (terrain, constructions, objects, NPCs)
                int layerMask = Layer.getBitmask(Layer.CONSTRUCTION, Layer.OBJECT, Layer.TERRAIN, Layer.WORLD, Layer.NPC);

                // Perform raycast to detect collisions
                player.raycast(layerMask, (RaycastResult result) -> {
                    if (result != null) {
                        Vector3f collisionPoint = result.getCollisionPoint();
                        Vector3f explosionScale = new Vector3f(5, 5, 5);

                        // Trigger an explosion at the collision point
                        World.triggerExplosion(collisionPoint, Quaternion.ZERO, explosionScale, 5);
                    }
                });
            }
        }

        // Handle left-click (NPC damage or small explosion)
        if (event.isPressed() && clicked == MouseButton.Left) {
            if (Boolean.TRUE.equals(player.getAttribute("Gun"))) {
                // Create a timer for continuous raycasting
                Timer raycastTimer = new Timer(-1, 0.0F, -1, null);
                Runnable raycastUpdate = () -> {
                    // Define collision layers for raycasting
                    int layerMask = Layer.getBitmask(Layer.CONSTRUCTION, Layer.OBJECT, Layer.TERRAIN, Layer.WORLD, Layer.NPC);

                    // Perform raycast to detect collisions
                    player.raycast(layerMask, (RaycastResult result) -> {
                        if (result != null) {
                            long objectID = result.getObjectGlobalID();
                            int layer = result.getLayer();
                            Vector3f collisionPoint = result.getCollisionPoint();
                            Vector3f explosionScale = new Vector3f(0.01f, 0.01f, 0.01f);

                            // Handle NPC damage if the layer is an NPC (layer 21)
                            if (layer == 21) {
                                Npc shotNpc = World.getNpc(objectID);
                                int health = shotNpc.getHealth();
                                if (health >= 1) {
                                    shotNpc.setHealth(health - 1);
                                } else {
                                    shotNpc.kill();
                                }
                            }

                            // Trigger a small explosion at the collision point
                            World.triggerExplosion(collisionPoint, Quaternion.ZERO, explosionScale, 0.01f);
                        }
                    });
                };

                // Start the raycast timer and schedule it to stop after 1 second
                raycastTimer.setTask(raycastUpdate);
                raycastTimer.start();
                executeDelayed(1.0f, () -> raycastTimer.kill());
            }
        }
    }

    /**
     * Handles the PlayerCommandEvent for processing the "/gun" command.
     * Toggles the player's gun mode on or off and notifies the player.
     * 
     * @param event The PlayerCommandEvent containing command details
     */
    @EventMethod
    public void onPlayerCommandEvent(PlayerCommandEvent event) {
        String[] cmd = event.getCommand().split(" ");
        Player player = event.getPlayer();

        // Check if the command is "/gun" (case-insensitive)
        if (cmd[0].equalsIgnoreCase("/gun")) {
            // Toggle the gun attribute and notify the player
            if (Boolean.FALSE.equals(player.getAttribute("Gun"))) {
                player.setAttribute("Gun", true);
                player.sendYellMessage("Gun Enabled", 3, true);
            } else {
                player.setAttribute("Gun", false);
                player.sendYellMessage("Gun disabled", 3, true);
            }
        }
    }
}