using System;
using UnityEditor;
using UnityEngine; 

namespace Phantom.XRMOD.UnityFusion.Editor
{
	internal class RenameComponentWindow : EditorWindow
	{
		private static readonly Color lineColorDarkSkin = new Color32(26, 26, 26, 255);
		private static readonly Color lineColorLightSkin = new Color32(127, 127, 127, 255);

		private static Color LineColor => EditorGUIUtility.isProSkin ? lineColorDarkSkin : lineColorLightSkin;

		[NonSerialized]
		private Component component;
		[NonSerialized]
		private string oldName;
		[NonSerialized]
		private string newName;

		public static void Open(Rect position, Component component)
		{
			NameContainer.NowRenaming = true;

			var window = CreateInstance<RenameComponentWindow>();

			window.component = component;
			string oldName = NameContainer.TryGet(component, out var nameContainer) && nameContainer.NameOverride is { Length: > 0 } nameOverride ? nameOverride : component.GetName();

			if(nameContainer && nameContainer.TooltipOverride is { Length: > 0 } tooltipOverride)
			{
				oldName += " | " + tooltipOverride;
			}

			window.oldName = oldName;
			window.newName = oldName;

			var buttonRect = position;
			buttonRect.height = 0f;
			var windowSize = position.size;
			window.minSize = position.size;
			window.maxSize = position.size;

			window.ShowAsDropDown(buttonRect, windowSize);
		}

		private void OnGUI()
		{
			if(!component)
			{
				Close();
				return;
			}

			if(Event.current.type == EventType.KeyDown)
			{
				switch(Event.current.keyCode)
				{
					case KeyCode.Escape:
						newName = oldName;
						Close();
						return;
					case KeyCode.Return:
					case KeyCode.KeypadEnter:
						Close();
						return;
				}
			}

			GUI.SetNextControlName("Rename Component Field");
			GUI.FocusControl("Rename Component Field");
			newName = EditorGUILayout.TextField(newName);

			// Fix for the TextField clipping over the very top line
			// of the component header component below it.
			var lineRect = new Rect(0f, 0f, Screen.width, 1f);
			EditorGUI.DrawRect(lineRect, LineColor);
		}

		private void OnLostFocus() => Close();

		private void OnDestroy()
		{
			NameContainer.StartingToRename = null;

			if(string.Equals(newName, oldName))
			{
				NameContainer.NowRenaming = false;
				return;
			}

			try
			{
				int tooltipSeparator = newName.IndexOf('|');
				if(tooltipSeparator == -1)
				{
					bool hadTooltip = oldName.IndexOf('|') != -1;
					if(hadTooltip)
					{
						component.SetName(new GUIContent(newName, ""));
					}
					else
					{
						component.SetName(newName);
					}
				}
				else
				{
					string newTooltip = newName.Substring(tooltipSeparator + 1).TrimStart();
					newName = newName.Substring(0, tooltipSeparator).TrimEnd();
					component.SetName(new GUIContent(newName, newTooltip));
				}

				InspectorContents.Repaint();
			}
			finally
			{
				NameContainer.NowRenaming = false;
			}
		}
	}
}