//
// This file is part of the Tremble package by Tiny Goose.
// Copyright (c) 2024-2026 TinyGoose Ltd., All Rights Reserved.
//

using System;
using System.Collections.Generic;
using System.IO;
using UnityEditor;
using UnityEngine;

namespace TinyGoose.Tremble.Editor
{
	[ManualPage("Entities/Point Entity Builder", showInTree: false)]
	public class PointBuilderPage : BuilderPageBase<PointBuilderPage.SampleData>
	{
		public class SampleData : ScriptableObject
		{
			[SerializeField] internal string m_UnityName = "MyCoolPoint";
			[SerializeField] internal string m_MapName = "";
			[SerializeField] internal string m_Category = "";
			[SerializeField] internal Color m_Colour = Color.white;
			[SerializeField] internal float m_Size = 0.25f;
			[SerializeField] internal Texture2D m_Sprite;
		}

		protected override void OnPropertiesGUI()
		{
			RenderProperty(nameof(SampleData.m_UnityName),
				title: "MonoBehaviour Name",
				description: "The name of the main MonoBehaviour script of your point entity.");

			RenderProperty(nameof(SampleData.m_MapName),
				title: "TrenchBroom name",
				description: "(optional) The entity name to use in TrenchBroom. Leave this blank to use the default.");

			RenderProperty(nameof(SampleData.m_Category),
				title: "Category Name",
				description: "(optional) The category/group name to use in TrenchBroom. Leave this blank to use the default.");

			RenderProperty(nameof(SampleData.m_Colour),
				title: "Preview Colour",
				description: "The colour of preview cube to represent this Point entity in TrenchBroom.");

			RenderProperty(nameof(SampleData.m_Size),
				title: "Preview Size",
				description: "The size of preview cube to represent this Point entity in TrenchBroom.");

			RenderProperty(nameof(SampleData.m_Sprite),
				title: "Preview Sprite",
				description: "(optional) A sprite to use to represent this Point entity in TrenchBroom.",
				objectReferenceType: typeof(Texture2D));
		}

		protected override void OnPostPropertiesGUI()
		{
			List<string> attributeParts = new(16);

			if (!Sample.m_MapName.IsNullOrEmpty())
			{
				attributeParts.Add($"\"{Sample.m_MapName}\"");
			}

			if (!Sample.m_Category.IsNullOrEmpty())
			{
				attributeParts.Add($"category: \"{Sample.m_Category}\"");
			}

			if (Sample.m_Sprite)
			{
				attributeParts.Add($"sprite: \"{Sample.m_Sprite.name}\"");
			}
			else
			{
				if (Sample.m_Colour != Color.white)
				{
					attributeParts.Add($"colour: \"{Sample.m_Colour.ToStringInvariant()}\"");
				}

				if (Sample.m_Size != 0.25f)
				{
					attributeParts.Add($"size: {Sample.m_Size}");
				}
			}

			string attrName = FormatAttributeName(typeof(PointEntityAttribute));

			string attributeLine = attributeParts.Count == 0
				? $"[{attrName}]"
				: $"[{attrName}({String.Join(", ", attributeParts)})]";

			string unityName = Sample.m_UnityName.IsNullOrEmpty()
				? "<error>"
				: Sample.m_UnityName;

			string catName = Sample.m_Category.IsNullOrEmpty() ? FgdConsts.POINT_PREFIX : Sample.m_Category;
			string entName = Sample.m_MapName.IsNullOrEmpty() ? Sample.m_UnityName.ToNamingConvention(SyncSettings.TypeNamingConvention) : Sample.m_MapName;
			HorizontalLine();

			GUILayout.BeginHorizontal();
			{
				GUILayout.BeginVertical();
				{
					H3("Create New Entity");

					string code =
						"// Generated by Tremble v1.7.0\n" +
						$"// Point entity '{catName}_{entName}'\n" +
						"\n" +
						"using UnityEngine;\n" +
						$"using {nameof(TinyGoose)}.{nameof(Tremble)};\n" +
						"\n" +
						attributeLine + "\n" +
						$"public class {unityName} : MonoBehaviour\n" +
						"{\n" +
						"    // Your cool class here ;)\n" +
						"}";

					CodeWithHeaderNoCopy($"Full source for {unityName}.cs", code);

					ActionBar_SingleAction("Save to new MonoBehaviour class", () =>
					{
						string assetsFolder = Path.Combine(Directory.GetCurrentDirectory(), "Assets");

						string filename = EditorUtility.SaveFilePanel($"Choose where to save {unityName}", assetsFolder, $"{unityName}.cs", "cs");
						if (!filename.IsNullOrEmpty())
						{
							File.WriteAllText(filename, code);
							EditorCompileUtil.CompileThen(typeof(PointBuilderPage), nameof(OnPostCompile));
						}
					});
				}
				GUILayout.EndVertical();

				GUILayout.Label("-or-", EditorStyles.centeredGreyMiniLabel, GUILayout.ExpandHeight(true));

				GUILayout.BeginVertical();
				{
					H3("Add to existing MonoBehaviour");
					CodeWithHeaderNoCopy("Attribute line only (for existing MonoBehaviour)", attributeLine);
					ActionBar_SingleAction("Copy to clipboard", () => EditorGUIUtility.systemCopyBuffer = attributeLine);
				}
				GUILayout.EndVertical();

			}
			GUILayout.EndHorizontal();
		}

		private static void OnPostCompile()
		{
			string message = TrenchBroomUtil.IsTrenchBroomRunning
				? "Be sure to press F6 in TrenchBroom to reload entity definitions, so that your new entity appears!"
				: "All done!";
			EditorUtility.DisplayDialog("MonoBehaviour created!", message, "Great!");

			ManualWindow mw = EditorWindow.GetWindow<ManualWindow>();
			if (mw)
			{
				mw.GoToPage(typeof(PointEntitiesPage));
			}
		}
	}
}