// TODO: some interface need to be designed in a module called 'Application' and 'Network'
declare module 'pal/system-info' {
    type Feature = import('../../pal/system-info/enum-type').Feature;
    type NetworkType = import('../../pal/system-info/enum-type').NetworkType;
    type Platform = import('../../pal/system-info/enum-type').Platform;
    type Language = import('../../pal/system-info/enum-type').Language;
    type OS = import('../../pal/system-info/enum-type').OS;
    type BrowserType = import('../../pal/system-info/enum-type').BrowserType;
    type PalSystemEvent = import('../../pal/system-info/enum-type').PalSystemEvent;

    export type IFeatureMap = {
        [feature in Feature]: boolean;
    };

    class SystemInfo {
        public get networkType (): NetworkType;
        public get isNative (): boolean;
        public get isBrowser (): boolean;
        public get isMobile (): boolean;
        public get isLittleEndian (): boolean;
        /**
         * Platform is a spacial field which is related to the build platform you choose on the Builder Panel in Cocos Creator.
         * It may point to an OS like Android or iOS.
         * It may point to a phone brand like vivo or OPPO.
         * Also it may point to an app channel like WeChat or ByteDance.
         */
        public get platform (): Platform;
        /**
         * This is the language code typed as `Language`.
         */
        public get language (): Language;
        /**
         * This is the native value return by platform
         * The valid value can be 'zh-tw','en','en-us','fr','fr-fr','es-es' and so on.
         */
        public get nativeLanguage (): string;
        public get os (): OS;
        public get osVersion (): string;
        public get osMainVersion (): number;
        public get browserType (): BrowserType;
        public get browserVersion (): string;
        public hasFeature (feature: Feature): boolean;
        public getBatteryLevel (): number;

        public triggerGC (): void;
        public openURL (url: string): void;
        public now (): number;
        public restartJSVM (): void;

        public close (): void;

        on (event: PalSystemEvent, cb: (...args: any)=>void, target?: any): void;
        off (event: PalSystemEvent, cb?: (...args: any)=>void, target?: any): void;
        // TODO: support onError
    }

    export const systemInfo: SystemInfo;
}