//
// 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/Brush Entity Builder", showInTree: false)]
	public class BrushBuilderPage : BuilderPageBase<BrushBuilderPage.SampleData>
	{
		public class SampleData : ScriptableObject
		{
			[SerializeField] internal string m_UnityName = "MyCoolBrush";
			[SerializeField] internal string m_MapName = "";
			[SerializeField] internal string m_Category = "";
			[SerializeField] internal BrushType m_Type = BrushType.Solid;
		}

		protected override void OnPropertiesGUI()
		{
			RenderProperty(nameof(SampleData.m_UnityName),
				title: "MonoBehaviour Name",
				description: "The name of the main MonoBehaviour script for your brush 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_Type),
				title: "Brush Type",
				description: "The brush type to use. Defaults to 'Solid'.",
				extraContent: () =>
				{
					Foldout("Available Brush Types", () =>
					{
						PropertyDescription("Solid",
							"A Solid brush with a texture.",
							"Example: a moving platform.");
						PropertyDescription("Liquid",
							"A brush with a texture, but with a trigger collision instead of a solid one.",
							"Example: a volume of water/lava, which damages players when entering.");
						PropertyDescription("Trigger",
							"A completely invisible brush which has a trigger collision.",
							"Example: a volume which triggers an event when players walk into the area.");
						PropertyDescription("Invisible",
							"A completely invisible brush which has solid collision.",
							"Example: an invisible wall to stop players going out of bounds.");
					});
				});
		}

		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_Type != BrushType.Solid)
			{
				attributeParts.Add($"type: {nameof(BrushType)}.{Sample.m_Type}");
			}

			string attrName = FormatAttributeName(typeof(BrushEntityAttribute));
			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.BRUSH_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" +
						$"// Brush 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(BrushBuilderPage), 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(BrushEntitiesPage));
			}
		}
	}
}