using UnityEngine;
using UnityEditor;

using System.Collections.Generic;
using System.Security;
using Mono.Xml;
using Flux;

namespace FluxEditor
{
	public class FSequenceWindowHeader
	{
		// padding on top, bottom, left and right
		public const float PADDING = 5;

		// space between labels and the fields
		public const float LABEL_SPACE = 5;

		// space between elements (i.e. label+field pairs)
		public const float ELEMENT_SPACE = 20;

		// height of the header
		public const float HEIGHT = 20 + PADDING + PADDING;

		private const float MAX_SEQUENCE_POPUP_WIDTH = 250;
		private const float UPDATE_MODE_FIELD_WIDTH = 100;
		private const float FRAMERATE_FIELD_WIDTH = 40;
		private const float LENGTH_FIELD_WIDTH = 100;

		// window this header belongs to
		private FSequenceEditorWindow _sequenceWindow;

		private SerializedObject _sequenceSO;

		private SerializedProperty _sequenceUpdateMode;
		private SerializedProperty _sequenceLength;

		// sequence selection popup variables
		private GUIContent _sequenceLabel = new GUIContent( "FrameEvents", "Select FrameEvent..." );

		// rect of the sequence label
		private Rect _sequenceLabelRect;

		// rect of the sequence name
		private Rect _sequencePopupRect;

		// rect for the button to create a new sequence
		private Rect _sequenceAddButtonRect;

		private FSequence[] _sequences;

		private GUIContent[] _sequenceNames;

		private int _selectedSequenceIndex;

        private GUIContent _fileLabel = new GUIContent("文件列表", "请选择编辑的buff文件");
        private Rect _fileLabelRect;
        private Rect _fileSearchRect;
        private Rect _fileListPopupRect;

        private List<string> mFrameEventFiles = new List<string>();
        private List<string> mFileNames = new List<string>();
        private List<string> mSearchFiles = new List<string>();
        private int _selectedFileIndex;
        private Dictionary<string, FSequence> mEventFileMapping = new Dictionary<string, FSequence>();

		// update mode UI variables
		private GUIContent _updateModeLabel = new GUIContent( "Update Mode", "How does the sequence update:\n\tNormal: uses Time.time in Update()\n\tAnimatePhysics: uses Time.fixedTime in FixedUpdate()\n\tUnscaledTime: uses Time.unscaledTime in Update()" );
		private Rect _updateModeLabelRect;
		private Rect _updateModeFieldRect;
		private bool _showUpdadeMode;

		// framerate UI variables
		private GUIContent _framerateLabel = new GUIContent( "Frame Rate", "How many frames does the sequence have per second" );
		private Rect _framerateLabelRect;
		private Rect _framerateFieldRect;
		private bool _showFramerate;

		// length UI variables
		private GUIContent _lengthLabel = new GUIContent( "Length", "What's the length of the sequence" );
		private Rect _lengthLabelRect;
		private Rect _lengthFieldRect;
		private bool _showLength;


		private GUIContent _addContainerLabel = new GUIContent( string.Empty, "新增新的FrameEvent" );
		private Rect _addContainerRect;
		private bool _showAddContainer;

		private GUIContent _openInspectorLabel = new GUIContent( string.Empty, "打开内容编辑" );
		private Rect _openInspectorRect;

        private GUIContent _saveEventLabel = new GUIContent(string.Empty, "保存内容");
        private Rect _saveEventRect;

        private GUIContent _refreshLabel = new GUIContent("刷新", "重新刷新技能编辑器");
        private Rect _refreshRect;

		// cached number field style, since we want numbers centered
		private GUIStyle _numberFieldStyle;

        private string searchContent = "";
		public FSequenceWindowHeader( FSequenceEditorWindow sequenceWindow )
		{
			_sequenceWindow = sequenceWindow;

            LoadFrameEventFromXml();
            RebuildSequenceList();

			EditorApplication.hierarchyWindowChanged += OnHierarchyChanged;

			_addContainerLabel.image = FUtility.GetFluxTexture("AddFolder.png");
			_openInspectorLabel.image = FUtility.GetFluxTexture("Inspector.png");
            _saveEventLabel.image = FUtility.GetFluxTexture("SkinSave.png");
		}

		private void OnHierarchyChanged()
		{
            RebuildSequenceList();
		}

        private void LoadFrameEventFromXml()
        {
            _selectedFileIndex = -1;
            mEventFileMapping.Clear();
            mFrameEventFiles.Clear();
            mFileNames.Clear();
            mSearchFiles.Clear();

            string[] fileList = FileUtils.TraverseAllFiles("Assets/Content/Xml/Skill", "*.xml");

            for (int idx = 0; idx < fileList.Length; idx++)
            {
                if (!fileList[idx].Contains("buff_")) continue;

                mFrameEventFiles.Add(fileList[idx]);
            }

            for (int idx = 0; idx < mFrameEventFiles.Count; idx++)
            {
                mFileNames.Add(FileUtils.RemoveExtension(FileUtils.ExtractPureName(mFrameEventFiles[idx])));
            }
            mSearchFiles.AddRange(mFileNames);
        }

        private void RebuildSequenceList()
		{
			_sequences = GameObject.FindObjectsOfType<FSequence>();
			System.Array.Sort<FSequence>( _sequences, delegate(FSequence x, FSequence y) { return x.name.CompareTo(y.name); } );
			
			_sequenceNames = new GUIContent[_sequences.Length+1];
			for( int i = 0; i != _sequences.Length; ++i )
			{
				_sequenceNames[i] = new GUIContent(_sequences[i].name);
			}

			_sequenceNames[_sequenceNames.Length-1] = new GUIContent("[Create New FrameEvent]");
			_selectedSequenceIndex = -1;
        }

		public void RebuildLayout( Rect rect )
		{
			rect.xMin += PADDING;
			rect.yMin += PADDING;
			rect.xMax -= PADDING;
			rect.yMax -= PADDING;

			float width = rect.width;


			_openInspectorRect = rect;

            _saveEventRect = rect;


            _updateModeLabelRect = _updateModeFieldRect = rect;
			_framerateLabelRect = _framerateFieldRect = rect;
			_lengthLabelRect = _lengthFieldRect = rect;

			_updateModeLabelRect.width = EditorStyles.label.CalcSize( _updateModeLabel ).x + LABEL_SPACE;
			_updateModeFieldRect.width = UPDATE_MODE_FIELD_WIDTH;

			_framerateLabelRect.width = EditorStyles.label.CalcSize( _framerateLabel ).x + LABEL_SPACE;
			_framerateFieldRect.width = FRAMERATE_FIELD_WIDTH;

			_lengthLabelRect.width = EditorStyles.label.CalcSize( _lengthLabel ).x + LABEL_SPACE;
			_lengthFieldRect.width = LENGTH_FIELD_WIDTH;

            _fileLabelRect = rect;
            _fileLabelRect.width = EditorStyles.label.CalcSize(_fileLabel).x + LABEL_SPACE;

            _fileSearchRect = rect;
            _fileSearchRect.xMin = _fileLabelRect.xMax;
            _fileSearchRect.width = 200;

            _fileListPopupRect = rect;
            _fileListPopupRect.xMin = _fileSearchRect.xMax;
            _fileListPopupRect.width = 200;

            _sequenceLabelRect = rect;
            _sequenceLabelRect.xMin = _fileListPopupRect.xMax + ELEMENT_SPACE;
            _sequenceLabelRect.width = EditorStyles.label.CalcSize( _sequenceLabel ).x + LABEL_SPACE;

			_sequencePopupRect = rect;
			_sequencePopupRect.xMin = _sequenceLabelRect.xMax;
			_sequencePopupRect.width = Mathf.Min( width - _sequenceLabelRect.width, MAX_SEQUENCE_POPUP_WIDTH );

			_sequenceAddButtonRect = rect;
			_sequenceAddButtonRect.xMin = _sequencePopupRect.xMax + LABEL_SPACE;
			_sequenceAddButtonRect.width = 16;

			float reminderWidth = width - _sequenceAddButtonRect.xMax;

			_addContainerRect = new Rect(0, 3, 22, 22);
			_addContainerRect.x = _sequencePopupRect.xMax + LABEL_SPACE;

			reminderWidth -= (ELEMENT_SPACE + _addContainerRect.width);

			_showAddContainer = reminderWidth >= 0;

            _saveEventRect.x = _addContainerRect.x + _addContainerRect.width + LABEL_SPACE + 20;
            _saveEventRect.width = 60;

            _refreshRect = rect;
            _refreshRect.xMin = _saveEventRect.xMax;
            _refreshRect.width = 100;

            _openInspectorRect.xMin = _openInspectorRect.xMax - 22;

            reminderWidth -= 22 + PADDING;

			_lengthFieldRect.x = rect.xMax - 22 - PADDING - _lengthFieldRect.width;
			_lengthLabelRect.x = _lengthFieldRect.xMin - _lengthLabelRect.width;

			reminderWidth -= (ELEMENT_SPACE + _lengthLabelRect.width + _lengthFieldRect.width);

			_showLength = reminderWidth >= 0;

			_framerateFieldRect.x = _lengthLabelRect.xMin - ELEMENT_SPACE - _framerateFieldRect.width;
			_framerateLabelRect.x = _framerateFieldRect.xMin - _framerateLabelRect.width;

			reminderWidth -= (_framerateLabelRect.width + _framerateFieldRect.width + ELEMENT_SPACE);

			_showFramerate = reminderWidth >= 0;

			_updateModeFieldRect.x = _framerateLabelRect.xMin - ELEMENT_SPACE - _updateModeFieldRect.width;
			_updateModeLabelRect.x = _updateModeFieldRect.xMin - _updateModeLabelRect.width;

			reminderWidth -= (_updateModeLabelRect.width + _updateModeFieldRect.width + ELEMENT_SPACE);

			_showUpdadeMode = reminderWidth >= 0;

			_numberFieldStyle = new GUIStyle( EditorStyles.numberField );
			_numberFieldStyle.alignment = TextAnchor.MiddleCenter;
		}

		public void OnGUI()
		{
			FSequence sequence = _sequenceWindow.GetSequenceEditor().Sequence;

			if( (_selectedSequenceIndex < 0 && sequence != null) || (_selectedSequenceIndex >= 0 && _sequences[_selectedSequenceIndex] != sequence) )
			{
				for( int i = 0; i != _sequences.Length; ++i )
				{
					if( _sequences[i] == sequence )
					{
						_selectedSequenceIndex = i;
						break;
					}
				}
			}


			if( Event.current.type == EventType.MouseDown && Event.current.alt && _sequencePopupRect.Contains(Event.current.mousePosition) )
			{
				Selection.activeObject = sequence;
				Event.current.Use();
			}

            EditorGUI.BeginChangeCheck();
            EditorGUI.PrefixLabel(_fileLabelRect, _fileLabel);
            searchContent = EditorGUI.TextField(_fileSearchRect, searchContent);
            if(EditorGUI.EndChangeCheck())
            {
                SearchFile(searchContent);
            }

            EditorGUI.BeginChangeCheck();
            int fileIdx = EditorGUI.Popup(_fileListPopupRect, _selectedFileIndex, mSearchFiles.ToArray());
            if (EditorGUI.EndChangeCheck())
            {
                _selectedFileIndex = fileIdx;
                string fileName = mSearchFiles[_selectedFileIndex];
                ReadFrameEvent(fileName);
            }

            EditorGUI.BeginChangeCheck();
			EditorGUI.PrefixLabel( _sequenceLabelRect, _sequenceLabel );
			int newSequenceIndex = EditorGUI.Popup( _sequencePopupRect, _selectedSequenceIndex, _sequenceNames );
			if( EditorGUI.EndChangeCheck() )
			{
				if( newSequenceIndex == _sequenceNames.Length-1 )
				{
					FSequence newSequence = FSequenceEditorWindow.CreateSequence();
					Selection.activeTransform = newSequence.transform;
					_sequenceWindow.GetSequenceEditor().OpenSequence( newSequence );
				}
				else
				{
					_selectedSequenceIndex = newSequenceIndex;
					_sequenceWindow.GetSequenceEditor().OpenSequence( _sequences[_selectedSequenceIndex] );
					_sequenceWindow.RemoveNotification();
				}
				EditorGUIUtility.keyboardControl = 0; // deselect it
				EditorGUIUtility.ExitGUI();
			}

			// if we're in play mode, can't change anything
			if( Application.isPlaying )
				GUI.enabled = false;

			if( sequence == null )
				return;

			if( _sequenceSO == null || _sequenceSO.targetObject != sequence )
			{
				_sequenceSO = new SerializedObject( sequence );
				_sequenceUpdateMode = _sequenceSO.FindProperty( "_updateMode" );
				_sequenceLength = _sequenceSO.FindProperty( "_length" );
			}

			_sequenceSO.Update();

			if( _showUpdadeMode )
			{
				EditorGUI.PrefixLabel( _updateModeLabelRect, _updateModeLabel );
				EditorGUI.PropertyField( _updateModeFieldRect, _sequenceUpdateMode, GUIContent.none );
			}

			if( _showFramerate )
			{
				EditorGUI.PrefixLabel( _framerateLabelRect, _framerateLabel );
				EditorGUI.BeginChangeCheck();
				int newFrameRate = FGUI.FrameRatePopup( _framerateFieldRect, sequence.FrameRate );
				if( EditorGUI.EndChangeCheck() )
				{
					if( newFrameRate == -1 )
					{
						FChangeFrameRateWindow.Show( new Vector2(_framerateLabelRect.xMin, _framerateLabelRect.yMax), sequence, FSequenceInspector.Rescale );
					}
					else
					{
						FSequenceInspector.Rescale( sequence, newFrameRate, true );
					}
				}
			}
				
			if( _showLength )
			{
				EditorGUI.PrefixLabel( _lengthLabelRect, _lengthLabel );
				_sequenceLength.intValue = Mathf.Clamp( EditorGUI.IntField( _lengthFieldRect, _sequenceLength.intValue, _numberFieldStyle ), 1, int.MaxValue );
			}

			GUIStyle s = new GUIStyle(EditorStyles.miniButton);
			s.padding = new RectOffset(1, 1, 1, 1);

			if( _showAddContainer )
			{
				if( FGUI.Button( _addContainerRect, _addContainerLabel ) )
				{
					AddContainer();
				}
			}


            if (FGUI.Button(_openInspectorRect, _openInspectorLabel))
            {
                FInspectorWindow.Open();
            }

            if (FGUI.Button(_saveEventRect, _saveEventLabel))
            {
                SaveContainer();
            }

			_sequenceSO.ApplyModifiedProperties();

            if (FGUI.Button(_refreshRect, _refreshLabel))
            {
                Refresh();
            }

            GUI.enabled = true;
		}

        private void Refresh()
        {
            if (_sequences == null) return;

            for (int idx = 0; idx < _sequences.Length; idx++)
            {
                _sequences[idx].ResetDefaultVal();
            }
        }

		private void AddContainer()
		{
			GenericMenu menu = new GenericMenu();

			bool hasDefaultContainers = false;

			List<FColorSetting> defaultContainers = FUtility.GetSettings().DefaultContainers;
			foreach( FColorSetting colorSetting in defaultContainers )
			{
				if( string.IsNullOrEmpty(colorSetting._str) )
					continue;

				menu.AddItem( new GUIContent( colorSetting._str ), false, CreateContainer, colorSetting );
				hasDefaultContainers = true;
			}

			if( !hasDefaultContainers )
			{
				_sequenceWindow.GetSequenceEditor().CreateContainer( new FColorSetting("Default", FGUI.DefaultContainerColor()) );
				return;
			}

			menu.AddSeparator(null);

			menu.AddItem( new GUIContent( "[Default New Container]" ), false, CreateContainer, new FColorSetting("Default", FGUI.DefaultContainerColor()) );

			menu.ShowAsContext();
		}

		private void CreateContainer( object data )
		{
			_sequenceWindow.GetSequenceEditor().CreateContainer( (FColorSetting)data );
		}

        private void SaveContainer()
        {
            _sequenceWindow.GetSequenceEditor().SaveToXml();
        }

        private void ReadFrameEvent(string fileName)
        {
            if (mEventFileMapping.ContainsKey(fileName))
            {
                Debug.LogError("文件 " + fileName + " 已经打开过");
                return;
            }

            string filePath = Constants.XmlConfig + "/Skill/" + fileName + ".xml";

            TextAsset ta = AssetDatabase.LoadAssetAtPath(filePath, typeof(TextAsset)) as TextAsset;

            if(ta == null)
            {
                Debug.LogError("加载文件:" + fileName + "失败!!");
                return;
            }

            SecurityParser doc = new SecurityParser();
            try
            {
                doc.LoadXml(ta.text);
            }
            catch (System.Exception e)
            {
                DebugHelper.LogError(string.Format("Load Frame Event, exception = {0}", e.Message));
                return;
            }

            SecurityElement root = doc.SelectSingleNode("FrameEvent");
            if (root == null || root.Children == null) return;

            for (int idx = 0; idx < root.Children.Count; idx++)
            {
                var buffNode = root.Children[idx] as SecurityElement;
                if (buffNode.Tag.CompareTo("buff") != 0) continue;

                int endFrame = 0;
                int.TryParse(buffNode.Attribute("endFrame"), out endFrame);
                string casterName = buffNode.Attribute("caster");
                string targetName = buffNode.Attribute("target");

                FSequence sequence = FSequence.CreateSequence();
                sequence.FrameRate = 30;
                sequence.Length = endFrame;

                if(!string.IsNullOrEmpty(casterName))
                    sequence.CasterActor = GameObject.Find(casterName);

                if(!string.IsNullOrEmpty(targetName))
                    sequence.TargetActor = GameObject.Find(targetName);

                sequence.CameraGo = Camera.main.gameObject;

                FTimeline timeline = FTimeline.Create(sequence.transform);
                sequence.Containers[0].Add(timeline);
                timeline.LoadFromXml(buffNode);

                Selection.activeTransform = sequence.transform;
                _sequenceWindow.GetSequenceEditor().OpenSequence(sequence);

                if(!mEventFileMapping.ContainsKey(fileName))
                {
                    mEventFileMapping.Add(fileName, sequence);
                }
                else
                {
                    string newFileName = fileName + "_" + timeline.Gender;
                    mEventFileMapping.Add(newFileName, sequence);
                }
            }
        }

        public void Destroy()
        {
            foreach(var pair in mEventFileMapping)
            {
                GameObject.DestroyImmediate(pair.Value.gameObject);
            }
            mEventFileMapping.Clear();
        }

        private void SearchFile(string content)
        {
            mSearchFiles.Clear();
            for(int idx =0; idx < mFileNames.Count;idx++)
            {
                string name = mFileNames[idx];
                if(name.StartsWith(content))
                {
                    mSearchFiles.Add(name);
                }
            }
        }
    }
}