using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Ichni.StartMenu;
using SLSUtilities.General;
using TMPro;
using UniRx;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.Serialization;

namespace Ichni
{
    public class ThemeBundleManager : Singleton<ThemeBundleManager>
    {
        /// <summary>小写别名，兼容现有调用点</summary>
        public new static ThemeBundleManager instance => Instance;

        public List<ThemeBundleAbstract> themeBundleAbstractList;
        public List<string> selectedThemeBundleList;
        public List<ThemeBundle> loadedThemeBundleList;

        public IntReactiveProperty waitingBundleAmount;

        public TMP_Text LogWindow;

        protected override void Awake()
        {
            Initialize(true); // DontDestroyOnLoad 持久化单例

            loadedThemeBundleList = new List<ThemeBundle>();
            AssetBundle.UnloadAllAssetBundles(true);
            LoadAllThemeBundlesAbstract();
        }

        public bool TryGetThemeBundle(string themeBundleName, out ThemeBundle themeBundle)
        {
            themeBundle = loadedThemeBundleList.Find(bundle => bundle.themeBundleName == themeBundleName);
            return themeBundle != null;
        }

        public T GetObject<T>(string themeBundleName, string objectName) where T : class
        {
            return loadedThemeBundleList.Find(bundle => bundle.themeBundleName == themeBundleName)?.GetObject<T>(objectName);
        }

        public void LoadThemeBundles(List<string> list)
        {
            AssetBundle.UnloadAllAssetBundles(true);
            loadedThemeBundleList.Clear();

            LogWindow = StartMenuManager.instance.startPage.logText;
            if (InformationTransistor.instance.isRecovery)
            {
                LogWindow.text += "Recovery Mode.\n";
                LogWindow.color = Color.red;
            }
            LogWindow.text += "Loading ThemeBundles, Please wait...\n";

            waitingBundleAmount = new IntReactiveProperty(list.Count);
            Debug.Log("Waiting for " + list.Count + " AssetBundles to load.");
            LogWindow.text += "Waiting for " + list.Count + " AssetBundles to load.\n";
            foreach (var bundle in list)
            {
                LoadThemeBundle(bundle);
            }

            selectedThemeBundleList = list;
        }

        public void LoadAllThemeBundlesAbstract()
        {
            string uri = Application.streamingAssetsPath + "/ThemeBundles/";

            if (ES3.DirectoryExists(uri))
            {
                List<string> allFileList = ES3.GetFiles(uri).ToList();
                List<string> absList = new List<string>();
                foreach (var abs in allFileList)
                {
                    if (abs.EndsWith(".abs"))
                    {
                        absList.Add(abs);
                    }
                }

                foreach (var abs in absList)
                {
                    themeBundleAbstractList.Add(ES3.Load<ThemeBundleAbstract>("ThemeBundleAbstract", uri + abs));
                }
            }
        }

        public void LoadThemeBundle(string themeBundleName)
        {
            StartCoroutine(LoadThemeBundleCoroutine(themeBundleName));
        }

        IEnumerator LoadThemeBundleCoroutine(string themeBundleName)
        {
            string uri = "";

            if (Application.platform == RuntimePlatform.WindowsEditor ||
                Application.platform == RuntimePlatform.WindowsPlayer)
            {
                uri = Application.streamingAssetsPath + "/ThemeBundles/Windows64/" + themeBundleName;
            }
            else if (Application.platform == RuntimePlatform.OSXEditor ||
                      Application.platform == RuntimePlatform.OSXPlayer)
            {

                uri = Application.streamingAssetsPath + "/ThemeBundles/OSX/" + themeBundleName;
            }

            UnityWebRequest request = UnityWebRequestAssetBundle.GetAssetBundle(uri, 0);
            yield return request.SendWebRequest();
            AssetBundle bundle = AssetBundle.LoadFromFile(uri);
            Object[] ob = bundle.LoadAllAssets<Object>();
            loadedThemeBundleList.Add(new ThemeBundle(themeBundleName));

            for (int i = 0; i < ob.Length; i++)
            {
                if (ob[i].GetType() == typeof(GameObject))
                {
                    loadedThemeBundleList[^1].assetList_GameObject.Add(ob[i] as GameObject);
                }
                else if (ob[i].GetType() == typeof(Material))
                {
                    loadedThemeBundleList[^1].assetList_Material.Add(ob[i] as Material);
                }
                else if (ob[i].GetType() == typeof(Texture2D))
                {
                    loadedThemeBundleList[^1].assetList_Texture.Add(ob[i] as Texture2D);
                }
                else
                {
                    loadedThemeBundleList[^1].assetList_Other.Add(ob[i]);
                }
            }

            yield return new WaitForEndOfFrame();
            print(themeBundleName + " Done!");
            LogWindow.text += themeBundleName + " Done!\n";
            waitingBundleAmount.Value--;
        }
    }

    [System.Serializable]
    public class ThemeBundleAbstract
    {
        public string fileName;
        public string displayName;
        public string description;
        public List<string> tags;
        public string iconPath;

        public ThemeBundleAbstract()
        {
        }

        public ThemeBundleAbstract(string fileName)
        {
            this.fileName = fileName;
            this.displayName = fileName;
            this.description = "Default Description";
            this.tags = new List<string>();
            this.iconPath = "Icons/Default.png";
        }

        public Texture2D GetIcon()
        {
            string uri = Application.streamingAssetsPath + "/" + iconPath;
            if (ES3.FileExists(uri))
            {
                Texture2D sp = ES3.LoadImage(uri);
                return sp;
            }
            return null;
        }
    }

    [System.Serializable]
    public class ThemeBundle
    {
        public string themeBundleName;
        public List<GameObject> assetList_GameObject;
        public List<Material> assetList_Material;
        public List<Texture2D> assetList_Texture;
        public List<Object> assetList_Other;

        public ThemeBundle(string name)
        {
            themeBundleName = name;
            assetList_GameObject = new List<GameObject>();
            assetList_Material = new List<Material>();
            assetList_Texture = new List<Texture2D>();
            assetList_Other = new List<Object>();
        }

        public T GetObject<T>(string name)
        {
            if (name == "None")
            {
                return default(T);
            }

            T[] assetList;

            if (typeof(T) == typeof(GameObject))
            {
                assetList = assetList_GameObject.ToArray() as T[];

                for (int i = 0; i < assetList_GameObject.Count; i++)
                {
                    if (name == assetList_GameObject[i].name)
                    {
                        return assetList[i];
                    }
                }
            }
            else if (typeof(T) == typeof(Material))
            {
                assetList = assetList_Material.ToArray() as T[];

                for (int i = 0; i < assetList_Material.Count; i++)
                {
                    if (name == assetList_Material[i].name)
                    {
                        return assetList[i];
                    }
                }
            }
            else if (typeof(T) == typeof(Texture2D))
            {
                assetList = assetList_Texture.ToArray() as T[];

                for (int i = 0; i < assetList_Texture.Count; i++)
                {
                    if (name == assetList_Texture[i].name)
                    {
                        return assetList[i];
                    }
                }
            }
            else
            {
                assetList = assetList_Other.ToArray() as T[];
                for (int i = 0; i < assetList_Other.Count; i++)
                {
                    if (name == assetList_Other[i].name)
                    {
                        return assetList[i];
                    }
                }
            }

            return default(T);
        }
    }
}