import { Object3D } from "three";

import { getParam } from "../../engine/engine_utils.js";
import { Behaviour, GameObject } from "../Component.js";
import { XRFlag } from "./XRFlag.js";

export const debug = getParam("debugavatar");

export type AvatarMarkerEventArgs = {
    avatarMarker: AvatarMarker;
    gameObject: Object3D;
}

/** 
 * This is used to mark an object being controlled / owned by a player   
 * This system might be refactored and moved to a more centralized place in a future version
 */
// We might be updating this system in the future to a centralized API (PlayerView)  
// but since currently quite a few core components rely on it, we're keeping it for now
export class AvatarMarker extends Behaviour {

    public static getAvatar(index: number): AvatarMarker | null {
        if (index >= 0 && index < AvatarMarker.instances.length)
            return AvatarMarker.instances[index];
        return null;
    }

    public static instances: AvatarMarker[] = [];

    public static onAvatarMarkerCreated(cb: (args: AvatarMarkerEventArgs) => void): Function {
        AvatarMarker._onNewAvatarMarkerAdded.push(cb);
        return cb;
    }

    public static onAvatarMarkerDestroyed(cb: (args: AvatarMarkerEventArgs) => void): Function {
        AvatarMarker._onAvatarMarkerDestroyed.push(cb);
        return cb;
    }

    private static _onNewAvatarMarkerAdded: Array<(args: AvatarMarkerEventArgs) => void> = [];
    private static _onAvatarMarkerDestroyed: Array<(args: AvatarMarkerEventArgs) => void> = [];


    public connectionId!: string;
    public avatar?: Object3D & { flags?: XRFlag[] }

    awake() {
        AvatarMarker.instances.push(this);
        if (debug)
            console.log(this);

        for (const cb of AvatarMarker._onNewAvatarMarkerAdded)
            cb({ avatarMarker: this, gameObject: this.gameObject });
    }

    onDestroy() {
        AvatarMarker.instances.splice(AvatarMarker.instances.indexOf(this), 1);

        for (const cb of AvatarMarker._onAvatarMarkerDestroyed)
            cb({ avatarMarker: this, gameObject: this.gameObject });
    }

    isLocalAvatar() {
        return this.connectionId === this.context.connection.connectionId;
    }
}