/*
 * Copyright (c) 2021 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.
 */

class EventHub {
    constructor() {
        this.eventMap = {};
    }

    on(event, callback) {
        if ((typeof(event) != 'string') || (typeof(callback) != 'function')) {
            return;
        }
        if (!this.eventMap[event]) {
            this.eventMap[event] = [];
        }
        if (this.eventMap[event].indexOf(callback) == -1) {
            this.eventMap[event].push(callback);
        }
    }

    off(event, callback) {
        if (typeof(event) != 'string') {
            return;
        }
        if (this.eventMap[event]) {
            if (callback) {
                let index = this.eventMap[event].indexOf(callback);
                if (index > -1) {
                    this.eventMap[event].splice(index, 1);
                }
            } else {
                this.eventMap[event].length = 0;
            }
        }
    }

    emit(event, ...args) {
        if (typeof(event) != 'string') {
            return;
        }
        if (this.eventMap[event]) {
            this.eventMap[event].map((callback) => {
                callback(...args);
            });
        }
    }
}

class Context {
    constructor(obj) {
        this.__context_impl__ = obj
        this.__context_impl__.eventHub = new EventHub()
    }

    createBundleContext(bundleName) {
        return this.__context_impl__.createBundleContext(bundleName)
    }

    getApplicationContext() {
        return this.__context_impl__.getApplicationContext()
    }

    switchArea(mode) {
        return this.__context_impl__.switchArea(mode)
    }

    get resourceManager() {
        return this.__context_impl__.resourceManager
    }

    get applicationInfo() {
        return this.__context_impl__.applicationInfo
    }

    get cacheDir() {
        return this.__context_impl__.cacheDir
    }

    get tempDir() {
        return this.__context_impl__.tempDir
    }

    get filesDir() {
        return this.__context_impl__.filesDir
    }

    get distributedFilesDir() {
        return this.__context_impl__.distributedFilesDir
    }

    get databaseDir() {
        return this.__context_impl__.databaseDir
    }

    get storageDir() {
        return this.__context_impl__.storageDir
    }

    get bundleCodeDir() {
        return this.__context_impl__.bundleCodeDir
    }

    get eventHub() {
        return this.__context_impl__.eventHub
    }

    get stageMode() {
        return true;
    }
}

export default Context
