/*
 * Copyright (c) 2022 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.
 */

import Log from "../Log";

export type EventTarget = "local" | "remote" | "ability" | "commonEvent";
export type Event = {
    target: EventTarget;
    data: { [key: string]: any };
};
export type EventParser = {
    [key in EventTarget]: (data: any) => boolean;
};
export type LocalEvent = {
    eventName: string;
    args: any;
};

export const START_ABILITY_EVENT = "startAbilityEvent";
export const PUBLISH_COMMON_EVENT = "publishCommonEvent";

const TAG = "EventUtil";
const LOCAL_EVENT_TYPE = "local";
const START_ABILITY_TYPE = "ability";

export function obtainLocalEvent(event: string, args: any): Event & { data: LocalEvent } {
    return {
        target: LOCAL_EVENT_TYPE,
        data: {
            eventName: event,
            args,
        },
    };
}

export function obtainStartAbility(bundleName: string, abilityName: string, args?: any): Event {
    return {
        target: START_ABILITY_TYPE,
        data: {
            bundleName,
            abilityName,
            args
        },
    };
}

export function parseEventString(eventString: string | undefined): Event | undefined {
    // string must be "local=eventName|args" or "ability=bundleName|abilityName"
    if (!eventString) {
        return;
    }
    let [eventType, eventData] = eventString.split("=");
    if (eventType == LOCAL_EVENT_TYPE && eventData) {
        let [localEventName, args] = eventData.split("|");
        if (localEventName) {
            Log.showDebug(TAG, `parseEventData name:${localEventName}, args: ${args}`);
            return obtainLocalEvent(localEventName, args);
        }
    }
    if (eventType == START_ABILITY_TYPE && eventData) {
        let [bundleName, abilityName] = eventData.split("|");
        if (bundleName && abilityName) {
            Log.showDebug(TAG, `parseEventData bundleName:${bundleName}, abilityName: ${abilityName}`);
            return obtainStartAbility(bundleName, abilityName);
        }
    }
    Log.showError(TAG, `Can't parse event data: ${eventString}`);
    return undefined;
}