using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Cysharp.Threading.Tasks;
using Framework;
using PhxhSDK;
using UnityEngine;
using UnityEngine.AddressableAssets;
using UnityEngine.ResourceManagement.AsyncOperations;
using UnityEngine.ResourceManagement.ResourceProviders;
using UnityEngine.SceneManagement;

namespace Gameplay.SubSystems
{
    public class GameSceneManager : Singlenton<GameSceneManager>
    {
        public enum EnumScene
        {
            GameStart, // 登录场景
            GameMain, // 主场景
            GameLevel // 关卡（战场）场景
        }

        public const string SCENE_PREFIX = "Assets/Scenes/";
        public const string START_SCENE_NAME = "StartScene";
        public const string LEVEL_SCENE_NAME = "LevelScene";
        public const string MAIN_SCENE_NAME = "MainScene";
        public const string SCENE_SUFFIX = ".unity";

        private Dictionary<string, AsyncOperationHandle<SceneInstance>> _sceneOpDic = new();

        public async UniTask ChangeScene(EnumScene enumScene)
        {
            string sceneName = SCENE_PREFIX;
            switch (enumScene)
            {
                case EnumScene.GameStart:
                    sceneName += START_SCENE_NAME;
                    break;
                case EnumScene.GameMain:
                    sceneName += MAIN_SCENE_NAME;
                    break;
                case EnumScene.GameLevel:
                    sceneName += LEVEL_SCENE_NAME;
                    break;
                default:
                    DebugUtil.LogError("{0}.ChangeScene, {1} has no scene name matched", GetType(), enumScene);
                    sceneName += START_SCENE_NAME;
                    break;
            }

            sceneName += SCENE_SUFFIX;
            await LoadSceneAsync(sceneName);
        }


        public async UniTask LoadSceneAsync(string scenePath, LoadSceneMode mode = LoadSceneMode.Single)
        {
            if (string.IsNullOrEmpty(scenePath))
            {
                DebugUtil.LogError($"ScenePath is null!");
                return;
            }

            if(mode == LoadSceneMode.Single)
                _sceneOpDic.Clear();
            
            if (!_sceneOpDic.TryGetValue(scenePath, out var op))
            {
                op = Addressables.LoadSceneAsync(scenePath, mode);
                _sceneOpDic.Add(scenePath, op);
            }

            await op.ToUniTask();
        }

        public async UniTask UnLoadSceneAsync(string scenePath)
        {
            if (string.IsNullOrEmpty(scenePath))
            {
                DebugUtil.LogError($"ScenePath is null!");
                return;
            }

            if (!_sceneOpDic.TryGetValue(scenePath, out var op))
            {
                Debug.LogError($"该场景没有被加载过 scenePath:{scenePath}");
                return;
            }

            _sceneOpDic.Remove(scenePath);
            await Addressables.UnloadSceneAsync(op).ToUniTask();
        }

        public float GetSceneLoadingProgress(string scenePath)
        {
            if (_sceneOpDic.TryGetValue(scenePath, out var op))
            {
                return op.PercentComplete;
            }

            return 0;
        }
    }
}