using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Ichni.RhythmGame;
using Ichni.RhythmGame.Beatmap;
using UnityEngine;
using UnityEngine.InputSystem;

namespace Ichni.Editor
{
    public class OperationManager
    {
        public List<GameElement> currentSelectedElements { get; private set; }
        public TempOutlineModule TempOutlineModule = new TempOutlineModule();
        public CopyPasteDeleteModule CopyPasteDeleteModule;

        public FindingModule FindingModule;

        public OperationManager()
        {
            currentSelectedElements = new List<GameElement>();
            CopyPasteDeleteModule = new CopyPasteDeleteModule();
            FindingModule = new FindingModule();
        }

        public void AddSelectElement(GameElement gameElement)
        {
            if (gameElement == null || gameElement.connectedTab == null) return;
            if (currentSelectedElements.Contains(gameElement)) return;

            currentSelectedElements.Add(gameElement);

            gameElement.connectedTab.isSelected = true;
            if (gameElement.connectedTab.BgImage != null)
            {
                gameElement.connectedTab.BgImage.color = new Color(0f, 0f, 0f, 0.8f);
            }
        }

        public void RemoveSelectElement(GameElement gameElement)
        {
            if (gameElement == null) return;

            currentSelectedElements.Remove(gameElement);

            if (gameElement.connectedTab == null) return;

            gameElement.connectedTab.isSelected = false;
            if (gameElement.connectedTab.BgImage != null)
            {
                gameElement.connectedTab.BgImage.color = new Color(0.5f, 0.5f, 0.5f, 0);
            }
        }

        public void ClearSelectedElements()
        {
            currentSelectedElements.RemoveAll(gameElement => gameElement == null);
            currentSelectedElements.ForEach(gameElement =>
            {
                if (gameElement == null || gameElement.connectedTab == null) return;
                gameElement.connectedTab.isSelected = false;
                if (gameElement.connectedTab.BgImage != null)
                {
                    gameElement.connectedTab.BgImage.color = new Color(0.5f, 0.5f, 0.5f, 0);
                }
            });

            currentSelectedElements.Clear();
        }
    }
    public class TempOutlineModule
    {
        public List<GameElement> outlinedElements;
        public Material outlineMaterial => EditorManager.instance.basePrefabs.outlineShaderMaterial;
        public TempOutlineModule()
        {
            outlinedElements = new List<GameElement>();
        }

        public void AddOutline(GameElement gameElement)
        {
            outlinedElements.Add(gameElement);
        }

        public void RemoveOutline(GameElement gameElement)
        {
            outlinedElements.Remove(gameElement);
        }

        public void ClearOutline()
        {
            outlinedElements.Clear();
        }
    }
    public class FindingModule
    {
        public GameElement FindGameElementByName(string elementName)
        {
            foreach (GameElement element in EditorManager.instance.beatmapContainer.gameElementList)
            {
                if (element.elementName == elementName)
                {
                    return element;
                }
            }

            LogWindow.Log("Element not found: " + elementName, Color.red);
            return null;
        }
    }

    public class CopyPasteDeleteModule
    {
        public GameElement copiedElement;
        public List<GameElement> pastedElementList;

        public void CopyElement(GameElement gameElement)
        {
            if (gameElement == null)
            {
                LogWindow.Log("No element selected to copy.", Color.red);
                return;
            }

            LogWindow.Log("Copied element: " + gameElement.elementName);
            copiedElement = gameElement;
        }

        public void PasteElement(GameElement parentElement)
        {
            if (parentElement == null)
            {
                LogWindow.Log("No parent element selected to paste.", Color.red);
                return;
            }

            if (copiedElement == null)
            {
                LogWindow.Log("No element copied.");
                return;
            }

            LogWindow.Log("Pasted element: " + copiedElement.elementName + " to " + parentElement.elementName);
            pastedElementList = new List<GameElement>();
            AffiliatedPaste(copiedElement, parentElement);

            // 粘贴完成后，对所有新生成的元素执行 AfterInitialize 和 Refresh，
            // 与 EditorManager.LoadProject 的加载后流程对齐，确保 Manager 注册等关键步骤不遗漏。
            foreach (GameElement pasted in pastedElementList)
            {
                if (pasted == null) continue;
                pasted.AfterInitialize();
                pasted.Refresh();
            }
        }

        public void DeleteElement(GameElement gameElement)
        {
            if (gameElement == null)
            {
                LogWindow.Log("No element selected to delete.", Color.red);
                return;
            }

            LogWindow.Log("Deleted element: " + gameElement.elementName + " and all its children.");

            if (gameElement.parentElement != null)
            {
                gameElement.parentElement.childElementList.Remove(gameElement); //从父物体的子物体列表中移除，避免报null
                gameElement.parentElement.connectedTab.childTabList.Remove(gameElement.connectedTab);
                gameElement.parentElement.connectedTab.SetStatus();
            }

            EditorManager.instance.operationManager.RemoveSelectElement(gameElement);
            gameElement.Delete();
            EditorManager.instance.uiManager.inspector.ClearInspector();
        }

        /// <summary>
        /// 使用递归的方式复制粘贴物体及其所有子物体
        /// </summary>
        /// <param name="gameElement">将要被粘贴的物体</param>
        /// <param name="parent">（将要）被粘贴物体的父物体</param>
        /// <returns></returns>
        private void AffiliatedPaste(GameElement gameElement, GameElement parent)
        {
            if (gameElement == null || parent == null) return;

            gameElement.SaveBM();
            if (gameElement.matchedBM is not GameElement_BM gameElementBM)
            {
                LogWindow.Log("Paste failed: " + gameElement.elementName + " did not create a valid BM.", Color.red);
                return;
            }

            GameElement pastedElement = gameElementBM.DuplicateBM(parent);
            if (pastedElement == null)
            {
                LogWindow.Log("Paste failed: " + gameElement.elementName + " could not be duplicated.", Color.red);
                return;
            }

            pastedElementList.Add(pastedElement);

            gameElement.submoduleList.ForEach(submodule =>
            {
                if (submodule == null) return;
                Debug.Log(submodule.GetType() + " is pasted.");
                submodule.SaveBM();
                if (submodule.matchedBM is not Submodule_BM submoduleBM) return;

                SubmoduleBase existingSubmodule = pastedElement.submoduleList
                    .FirstOrDefault(pastedSubmodule => pastedSubmodule != null && pastedSubmodule.GetType() == submodule.GetType());
                existingSubmodule?.Delete();

                try { submoduleBM.DuplicateBM(pastedElement); }
                catch { Debug.LogWarning("Submodule paste error: " + submodule.GetType()); }
            });

            if (gameElement.childElementList != null)
            {
                foreach (GameElement Element in gameElement.childElementList.Where(x => !pastedElementList.Contains(x)))
                {
                    AffiliatedPaste(Element, pastedElement);
                }

            }
        }
    }
}