using UnityEditor;
using UnityEngine;
using System;
using System.Collections;
using UnityEngine.Networking;

namespace AmplifyShaderEditor
{
	[InitializeOnLoad]
	public class InvalidDataChecker
	{
		private static string[] m_invalidData = {	"674ea7bed6b1cd94b8057074298096db", //"/Samples",
													"2738539936eacef409be91f148b2a4a0", //"/Resources",
													"c880e50f07f2be9499d414ac6f9f3a7a", //"/Templates",
													"563f992b9989cf547ac59bf748442c17"};//"/Textures"};
		//private static string m_ASEFolderPath;
		private static string m_invalidDataCollected = string.Empty;
		static InvalidDataChecker()
		{
			bool foundInvalidData = false;
			//m_ASEFolderPath = AssetDatabase.GUIDToAssetPath( IOUtils.ASEFolderGUID );
			int count = 0;
			for ( int i = 0; i < m_invalidData.Length; i++ )
			{
				//m_invalidData[ i ] = m_ASEFolderPath + m_invalidData[ i ];
				m_invalidData[ i ] = AssetDatabase.GUIDToAssetPath( m_invalidData[ i ] );
				if ( AssetDatabase.IsValidFolder( m_invalidData[ i ] ) )
				{
					foundInvalidData = true;
					m_invalidDataCollected += m_invalidData[ i ]+"\n";
					count += 1;
				}
			}
			if ( count < 5 )
			{
				for ( ; count < 5; count++ )
				{
					m_invalidDataCollected += "\n";
				}
			}

			if ( foundInvalidData )
			{
				InvalidDataPopUp window = ( InvalidDataPopUp ) EditorWindow.GetWindow( typeof( InvalidDataPopUp ), true, "Found Invalid Data" );
				window.minSize = new Vector2( 502, 265 );
				window.maxSize = new Vector2( 502, 265 );
				window.Show();
			}

			EditorApplication.update += Update;
		}

		static void Update()
		{
			EditorApplication.update -= Update;

			if( !EditorApplication.isPlayingOrWillChangePlaymode )
			{
				Preferences.ShowOption show = Preferences.ShowOption.Never;
				if( !EditorPrefs.HasKey( Preferences.PrefStartUp ) )
				{
					show = Preferences.ShowOption.Always;
					EditorPrefs.SetInt( Preferences.PrefStartUp, 0 );
				}
				else
				{
					if( Time.realtimeSinceStartup < 10 )
					{
						show = (Preferences.ShowOption) EditorPrefs.GetInt( Preferences.PrefStartUp, 0 );
						// check version here
						if( show == Preferences.ShowOption.OnNewVersion )
						{
							ASEStartScreen.StartBackgroundTask( StartRequest( ASEStartScreen.ChangelogURL, () =>
							{
								var changeLog = ChangeLogInfo.CreateFromJSON( www.downloadHandler.text );
								if( changeLog != null )
								{
									if( changeLog.Version > VersionInfo.FullNumber )
										ASEStartScreen.Init();
								}
							} ) );
						}
					}
				}

				if( show == Preferences.ShowOption.Always )
					ASEStartScreen.Init();
			}
		}

		static UnityWebRequest www;

		static IEnumerator StartRequest( string url, Action success = null )
		{
			using( www = UnityWebRequest.Get( url ) )
			{
#if UNITY_2017_2_OR_NEWER
				yield return www.SendWebRequest();
#else
				yield return www.Send();
#endif

				while( www.isDone == false )
					yield return null;

				if( success != null )
					success();
			}
		}

		public static void CleanInvalidData()
		{
			for ( int i = 0; i < m_invalidData.Length; i++ )
			{
				if ( FileUtil.DeleteFileOrDirectory( m_invalidData[ i ] ) )
				{
					Debug.Log( "Removed invalid " + m_invalidData[ i ] );
					if ( FileUtil.DeleteFileOrDirectory( m_invalidData[ i ] + ".meta" ) )
					{
						Debug.Log( "Removed invalid " + m_invalidData[ i ] + ".meta" );
					}
				}
			}
			AssetDatabase.Refresh();
		}

		public static string InvalidDataCollected { get { return m_invalidDataCollected; } }
	}
	
	public class InvalidDataPopUp : EditorWindow
	{
		private readonly GUIContent m_buttonContent = new GUIContent( "Remove Invalid Data" );
		private Vector2 m_scrollPosition = Vector2.zero;
		public void OnGUI()
		{
			GUILayout.BeginVertical();
			{	
				GUIStyle labelStyle = new GUIStyle( EditorStyles.label );
				labelStyle.alignment = TextAnchor.MiddleCenter;
				labelStyle.wordWrap = true;
				GUILayout.Label( "\nAmplify Shader Editor " + VersionInfo.StaticToString(), labelStyle, GUILayout.ExpandWidth( true ) );
				GUILayout.Space( 5 );
				GUILayout.Label( "Invalid/Legacy Data was found on your previous ASE folder which needs to be removed in order for it to work correctly." , labelStyle, GUILayout.ExpandWidth( true ) );
				GUILayout.Space( 5 );
				GUILayout.Label( "Below are the detected files/folders which require to be removed.", labelStyle, GUILayout.ExpandWidth( true ) );
				GUILayout.Space( 5 );

				m_scrollPosition = GUILayout.BeginScrollView( m_scrollPosition ,GUILayout.Height(85));
				
				GUILayout.TextArea( InvalidDataChecker.InvalidDataCollected );
				GUILayout.EndScrollView();


				GUILayout.Label( "VERY IMPORTANT: If you have assets of yours inside these folders you need to move them to another location before hitting the button below or they will be PERMANENTLY DELETED", labelStyle, GUILayout.ExpandWidth( true ) );
				GUILayout.Space( 5 );

				GUILayout.BeginHorizontal();
				{
					GUILayout.Space( 151 );
					if ( GUILayout.Button( m_buttonContent, GUILayout.Width( 200 ) ) )
					{
						InvalidDataChecker.CleanInvalidData();
						Close();
					}
				}
				GUILayout.EndHorizontal();
			}
			GUILayout.EndVertical();
	
		}
	}
}