using System;
using System.Collections;
using System.Diagnostics;
using System.IO;
using System.Linq;
using UnityEngine;
using RuntimeAudioClipLoader;
using System.Collections.Generic;

namespace RuntimeAudioClipLoaderDemo
{
	public class LoadAllStreamingAssets : MonoBehaviour
	{
		static string rootFolder { get { return Application.streamingAssetsPath; } }
		static string sourceFolder { get { return Path.Combine(rootFolder, "RuntimeAudioClipLoader"); } }


		public List<string> streamingAssetPathsToLoad;
		public List<AudioClip> loadedAudioClips = new List<AudioClip>();

		void Start()
		{
			streamingAssetPathsToLoad = Directory.GetFiles(sourceFolder, "*", SearchOption.AllDirectories)
					.Where(f => Manager.IsSupportedFormat(f))
					.Select(f => f.Substring(rootFolder.Length + 1))
					.ToList();
		}

		Coroutine lastCoroutine;
		private void Update()
		{
			if (streamingAssetPathsToLoad.Count > 0 && lastCoroutine == null)
			{
				var path = streamingAssetPathsToLoad[0];
				streamingAssetPathsToLoad.RemoveAt(0);
				lastCoroutine = StartCoroutine(StartLoading(path));
			}
		}


		IEnumerator StartLoading(string path)
		{
			var url = "file://" + Path.Combine(rootFolder, path);
			byte[] bytes = null;
			using (var webRequest = UnityEngine.Networking.UnityWebRequest.Get(url))
			{
				webRequest.SendWebRequest();

				while (!webRequest.isDone)
				{
					yield return new WaitForEndOfFrame();
				}

				if (webRequest.isNetworkError)
				{
					// failed
					lastCoroutine = null;
					yield break;
				}

				bytes = webRequest.downloadHandler.data;
			}

			var config = new AudioLoaderConfig();
			config.DataStream = new MemoryStream(bytes);
			config.UnityAudioClipName = path;

			var audioLoader = new AudioLoader(config);
			audioLoader.StartLoading();

			while (audioLoader.LoadState == AudioDataLoadState.Loading)
			{
				yield return new WaitForEndOfFrame();
			}

			if (audioLoader.LoadState == AudioDataLoadState.Failed)
			{
				// failed
				lastCoroutine = null;
				yield break;
			}

			loadedAudioClips.Add(audioLoader.AudioClip);

			lastCoroutine = null;
		}
	}
}