/*
 * Copyright (c) 2026 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * @file
 * @kit AbilityKit
 */
/**
 * Event handling types for testing systemapi deletion.
 *
 * @since 20
 */
export namespace EventHandling {
    /**
     * Base event interface.
     *
     * @since 20
     */
    export interface BaseEvent {
        type: string;
        timestamp: number;
        source?: string;
        data?: any;
    }
    /**
     * Custom event with payload.
     *
     * @since 20
     */
    export interface CustomEvent<T> extends BaseEvent {
        payload: T;
        cancelable: boolean;
    }
    /**
     * Event priority levels.
     *
     * @enum { number }
     * @since 20
     */
    export enum EventPriority {
        LOW = 0,
        NORMAL = 1,
        HIGH = 2,
        CRITICAL = 3
    }
    /**
     * Generic event dispatcher.
     *
     * @since 20
     */
    export class EventDispatcher {
        private listeners: Map<string, Array<EventListenerConfig>> = new Map();
        private config: DispatcherConfig;
        /**
         * Creates a new event dispatcher.
         *
         * @param config - Dispatcher configuration
         * @since 20
         */
        constructor(config: DispatcherConfig) {
            this.config = config;
        }
        /**
         * Registers an event listener.
         *
         * @param eventType - Event type to listen for
         * @param callback - Callback function
         * @param options - Listener options
         * @returns Listener ID
         * @since 20
         */
        public on(eventType: string, callback: (event: BaseEvent) => void, options?: EventOptions): string {
            const listenerId = this.generateId();
            return listenerId;
        }
        /**
         * Removes an event listener.
         *
         * @param listenerId - Listener ID to remove
         * @since 20
         */
        public off(listenerId: string): void {
            return;
        }
    }
    /**
     * Event listener options.
     *
     * @since 20
     */
    export interface EventOptions {
        priority?: EventPriority;
        once?: boolean;
        passive?: boolean;
    }
    /**
     * Event queue for async processing.
     *
     * @since 20
     */
    export class EventQueue {
        private queue: BaseEvent[] = [];
        private processing: boolean = false;
        /**
         * Enqueues an event.
         *
         * @param event - Event to enqueue
         * @since 20
         */
        public enqueue(event: BaseEvent): void {
            this.queue.push(event);
        }
        /**
         * Gets queue size.
         *
         * @returns Number of events in queue
         * @since 20
         */
        public size(): number {
            return this.queue.length;
        }
    }
    /**
     * Validates an event.
     *
     * @param event - Event to validate
     * @returns Whether event is valid
     * @since 20
     */
    export function validateEvent(event: BaseEvent): boolean {
        return event.type.length > 0;
    }
}