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

namespace Ichni.Editor
{
    public class OperationManager
    {
        public GameElement currentSelectedElement { get; private set; }

        public CopyPasteDeleteModule CopyPasteDeleteModule;

        public OperationManager()
        {
            CopyPasteDeleteModule = new CopyPasteDeleteModule();
        }

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

            currentSelectedElement = gameElement;
            currentSelectedElement.connectedTab.isSelected = true;
            currentSelectedElement.connectedTab.BgImage.color = new Color(0.5f, 0.5f, 0.5f, 0.2f);
        }
    }

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

        public void CopyElement(GameElement gameElement)
        {
            LogWindow.Log("Copied element: " + gameElement.elementName);
            copiedElement = gameElement;
        }

        public void PasteElement(GameElement parentElement)
        {
            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);
        }

        public void DeleteElement(GameElement gameElement)
        {
            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.Delete();
        }

        /// <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)
        {
            gameElement.SaveBM();
            GameElement pastedElement = (gameElement.matchedBM as GameElement_BM).DuplicateBM(parent);
            pastedElementList.Add(pastedElement);

            gameElement.submoduleList.ForEach(submodule =>
            {
                Debug.Log(submodule.GetType() + " is pasted.");
                submodule.SaveBM();
                (submodule.matchedBM as Submodule_BM).DuplicateBM(pastedElement);
            });

            if (gameElement.childElementList != null)
            {
                for (int i = 0; i < gameElement.childElementList.Count; i++)
                {
                    AffiliatedPaste(gameElement.childElementList[i], pastedElement);
                }
            }
        }
    }
}