// Copyright (c) 2020 Sergey Ivonchik
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
// OR OTHER DEALINGS IN THE SOFTWARE.

using System;
using UnityEngine;
using UnityEngine.Networking;

namespace Httx.Requests.Awaiters.Async {
  public class UnityAsyncOperation : IAsyncOperation {
    private readonly AsyncOperation operation;

    public UnityAsyncOperation(Func<AsyncOperation> operationFunc) {
      operation = operationFunc();
      operation.completed += o => OnComplete?.Invoke();
    }

    public event Action OnComplete;

    public object Result {
      get {
        if (operation is UnityWebRequestAsyncOperation webRequestOp) {
          return webRequestOp.webRequest;
        }

        if (operation is AssetBundleRequest bundleRequestOp) {
          return bundleRequestOp.asset;
        }

        return null;
      }
    }

    public bool Done => operation.isDone;
    public float Progress => operation.progress;
    public UnityWebRequest Request => (operation as UnityWebRequestAsyncOperation)?.webRequest;
  }
}