/*

 * Geekdroid is a utility library for development on the Android

 * Platform.

 *

 * Copyright (C) 2017-2024 by Frederic-Charles Barthelery.

 *

 * This file is part of Geekdroid.

 *

 * Geekdroid is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * Geekdroid is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with Geekdroid.  If not, see <http://www.gnu.org/licenses/>.

 */

package com.geekorum.geekdroid.gms

import com.google.android.gms.tasks.Task

import kotlinx.coroutines.CompletableDeferred

import kotlinx.coroutines.Deferred

/**

 * Converts this task to an instance of [Deferred].

 */

fun <T> Task<T>.asDeferred(): Deferred<T> {

    if (isComplete) {

        val e = exception

        return if (e == null) {

            @Suppress("UNCHECKED_CAST")

            CompletableDeferred<T>().apply { complete(result as T) }

        } else {

            CompletableDeferred<T>().apply { completeExceptionally(e) }

        }

    }

    val result = CompletableDeferred<T>()

    addOnCompleteListener {

        val e = it.exception

        if (e == null) {

            @Suppress("UNCHECKED_CAST")

            result.complete(it.result as T)

        } else {

            result.completeExceptionally(e)

        }

    }

    return result

}