// Minimal event emitter used as a base class throughout the SDK.
// Named MWSEEventTarget to avoid collision with the browser's built-in EventTarget.
export default class MWSEEventTarget {
    constructor() {
        this._events = {};
        this.activeScope = false;
    }

    emit(eventName, ...args) {
        const listeners = this._events[eventName];
        if (listeners) {
            for (const cb of listeners) cb(...args);
        }
    }

    on(eventName, callback) {
        if (this._events[eventName]) {
            this._events[eventName].push(callback);
        } else {
            this._events[eventName] = [callback];
        }
    }

    // scope(f) fires f immediately when already in scope, otherwise queues it for
    // the next 'scope' event — same convenience the original TS SDK provided.
    scope(f) {
        if (this.activeScope) {
            f();
        } else {
            this.on('scope', f);
        }
    }
}