using UnityEditor;
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using Fungus;
using Rotorz.ReorderableList;
using System.Linq;

namespace Fungus.Script
{

	[CustomPropertyDrawer (typeof(Variable))]
	public class VariableDrawer : PropertyDrawer 
	{	
		public override void OnGUI (Rect position, SerializedProperty property, GUIContent label) 
		{
			EditorGUI.BeginProperty(position, label, property);

			SerializedProperty keyProp = property.FindPropertyRelative("key");
			SerializedProperty typeProp = property.FindPropertyRelative("type");
			SerializedProperty scopeProp = property.FindPropertyRelative("scope");

			// Draw the text field control GUI.
			EditorGUI.BeginChangeCheck();

			float width1 = position.width * 0.5f;
			float width2 = position.width * 0.25f;
			float width3 = position.width * 0.25f;

			Rect keyRect = position;
			keyRect.width = width1;

			Rect typeRect = position;
			typeRect.x += width1;
			typeRect.width = width2;

			Rect scopeRect = position;
			scopeRect.x += width1 + width2;
			scopeRect.width = width3;

			string keyValue = EditorGUI.TextField(keyRect, label, keyProp.stringValue);
			int typeValue = (int)(VariableType)EditorGUI.EnumPopup(typeRect, (VariableType)typeProp.enumValueIndex);
			int scopeValue = (int)(VariableScope)EditorGUI.EnumPopup(scopeRect, (VariableScope)scopeProp.enumValueIndex);

			if (EditorGUI.EndChangeCheck ())
			{
				char[] arr = keyValue.Where(c => (char.IsLetterOrDigit(c) || c == '_')).ToArray(); 
				
				keyValue = new string(arr);

				keyProp.stringValue = keyValue;
				typeProp.enumValueIndex = typeValue;	
				scopeProp.enumValueIndex = scopeValue;
			}

			EditorGUI.EndProperty();
		}
	}

	[CustomEditor (typeof(FungusScript))]
	public class FungusScriptEditor : Editor 
	{
		SerializedProperty variablesProperty;

		void OnEnable() 
		{
			variablesProperty = serializedObject.FindProperty("variables");
		}

		public override void OnInspectorGUI() 
		{
			serializedObject.Update();

			FungusScript t = target as FungusScript;
		
			GUILayout.BeginHorizontal();
			GUILayout.FlexibleSpace();
			if (GUILayout.Button("Open Fungus Editor"))
			{
				EditorWindow.GetWindow(typeof(FungusEditorWindow), false, "Fungus Editor");
			}
			
			if (GUILayout.Button("New Sequence"))
			{
				GameObject go = new GameObject("Sequence");
				go.transform.parent = t.transform;
				Sequence s = go.AddComponent<Sequence>();
				FungusEditorWindow fungusEditorWindow = EditorWindow.GetWindow(typeof(FungusEditorWindow), false, "Fungus Editor") as FungusEditorWindow;
				s.nodeRect.x = fungusEditorWindow.scrollPos.x;
				s.nodeRect.y = fungusEditorWindow.scrollPos.y;
				Undo.RegisterCreatedObjectUndo(go, "Sequence");
				Selection.activeGameObject = go;
			}
			
			GUILayout.FlexibleSpace();
			GUILayout.EndHorizontal();

			GUIContent stepTimeLabel = new GUIContent("Step Time", "Minimum time to execute each step");
			t.stepTime = EditorGUILayout.FloatField(stepTimeLabel, t.stepTime);

			GUIContent startSequenceLabel = new GUIContent("Start Sequence", "Sequence to be executed when controller starts.");
			t.startSequence = SequenceEditor.SequenceField(startSequenceLabel, t, t.startSequence);

			GUIContent startAutomaticallyLabel = new GUIContent("Start Automatically", "Start this Fungus Script when the scene starts.");
			t.startAutomatically = EditorGUILayout.Toggle(startAutomaticallyLabel, t.startAutomatically);

			if (t.startSequence == null)
			{
				GUIStyle style = new GUIStyle(GUI.skin.label);
				style.normal.textColor = new Color(1,0,0);
				EditorGUILayout.LabelField(new GUIContent("Error: Please select a Start Sequence"), style);
			}

			ReorderableListGUI.Title("Variables");
			ReorderableListGUI.ListField(variablesProperty);

			serializedObject.ApplyModifiedProperties();
		}
	}

}