/*!
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the Microsoft Live Share SDK License.
 */

import {
    ExtendedMediaMetadata,
    IMediaPlayer,
} from "@microsoft/live-share-media";
import React from "react";

export function isRefObject<T>(value: any): value is React.RefObject<T> {
    return value.current === null || !!value.current;
}

export function isMediaElement(value: any): value is IMediaPlayer {
    if (value) {
        return (
            value.currentSrc !== undefined &&
            value.currentTime !== undefined &&
            value.duration !== undefined &&
            value.ended !== undefined &&
            value.muted !== undefined &&
            value.paused !== undefined &&
            value.playbackRate !== undefined &&
            value.src !== undefined &&
            value.volume !== undefined &&
            value.load !== undefined &&
            value.pause !== undefined &&
            value.play !== undefined &&
            value.addEventListener !== undefined &&
            value.removeEventListener !== undefined
        );
    }
    return false;
}

export function isExtendedMediaMetadata(
    value: any
): value is ExtendedMediaMetadata {
    return value === null || !!value?.trackIdentifier;
}

export function isMap(value: any): value is Map<string, any> {
    return value instanceof Map;
}

export function isEntries(
    value: any
): value is readonly (readonly [string, any])[] {
    try {
        const tryValue = value as readonly (readonly [any, any])[];
        if (typeof tryValue[0][0] === "string") {
            return true;
        }
        return false;
    } catch (error) {
        return false;
    }
}

export function isJSON(value: any): value is { [key: string]: any } {
    try {
        const tryValue = value as { [key: string]: any };
        return Object.keys(tryValue).length > 0;
    } catch (error) {
        return false;
    }
}