using System.Threading.Tasks;
using Data;
using Managers;
using UnityEngine;

namespace Map
{
    /// <summary>
    /// 表示游戏中的一个维度或场景区域。
    /// 实体管理器将根据此维度来组织和管理实体。
    /// </summary>
    public class Dimension : MonoBehaviour
    {
        [SerializeField] private bool defaultOpen = false;

        [SerializeField]
        [Tooltip("此维度的唯一标识符。如果为空，将使用GameObject的名称。")]
        private string _dimensionId;

        [SerializeField] public Landform landform;

        public Vector3 cameraPosition = new(0, 0, -10);

        public Entity.Entity focusEntity;
        
        public string mapGeneratorId;
        public DimensionDef dimensionDefinition;
        
        public Vector2Int DimensionSize { get;private set; }
        
        public event System.Action<Dimension> OnDimensionLoaded;
        /// <summary>
        /// 获取此维度的唯一标识符。
        /// </summary>
        public string DimensionId
        {
            get
            {
                if (string.IsNullOrEmpty(_dimensionId))
                {
                    _dimensionId = gameObject.name; // 如果未设置，默认使用GameObject名称
                }

                return _dimensionId;
            }
            // 内部设置器，允许在Awake中初始化或编辑器中赋值
            private set => _dimensionId = value;
        }

        /// <summary>
        /// 此维度下所有实体的根Transform。用于组织场景层级。
        /// </summary>
        public Transform DimensionRoot { get; private set; }

        private void Awake()
        {

            // 1. 确保 DimensionId 已初始化，这会触发 DimensionId 属性的 getter 逻辑
            var id = DimensionId;
            // 2. 创建一个用于存放此维度下所有实体的根GameObject，方便管理
            var rootObj = new GameObject($"_Entities_{id}");
            rootObj.transform.SetParent(this.transform); // 将其作为Dimension对象的子对象
            DimensionRoot = rootObj.transform;

            Program.Instance.RegisterDimension(this);
            landform.Init();
            if (defaultOpen)
            {
                Program.Instance.SetFocusedDimension(_dimensionId);
            }

            mapGeneratorId = Configs.ConfigManager.Instance.GetValue<string>(DimensionId);
            if (!string.IsNullOrEmpty(mapGeneratorId))
            {
                dimensionDefinition=DefineManager.Instance.FindDefine<DimensionDef>(mapGeneratorId);
                if (dimensionDefinition != null)
                {
                    _=ApplyDimensionDef(dimensionDefinition);
                }
            }

        }
        

        private void OnDestroy()
        {
            // 当 Dimension 对象被销毁时（例如，场景卸载），从 Program 和 EntityManage 注销
            if (Program.Instance != null) // 检查单例是否仍然存在
            {
                Program.Instance.UnregisterDimension(this);
            }
        }

        private async Task ApplyDimensionDef(DimensionDef def)
        {
            var maxWidth = DimensionSize.x; // 初始化为当前的维度尺寸
            var maxHeight = DimensionSize.y; // 初始化为当前的维度尺寸

            if (def.mapGenerators != null)
            {
                foreach (var defMapGenerator in def.mapGenerators)
                {
                    var workClass = TileManager.Instance.GetMapGeneratorWorkClass(defMapGenerator.defName);
                    if (workClass == null) continue;

                    var requiredSize = workClass.GetSize();
                    maxWidth = Mathf.Max(maxWidth, requiredSize.x);
                    maxHeight = Mathf.Max(maxHeight, requiredSize.y);
                }
                
                DimensionSize = new Vector2Int(maxWidth, maxHeight);
                cameraPosition = new Vector3(DimensionSize.x / 2f, DimensionSize.y / 2f, -10)+transform.position;
                foreach (var defMapGenerator in def.mapGenerators)
                {
                    await TileManager.Instance.ApplyMapGenerator(defMapGenerator.defName, landform);
                }
            }

            OnDimensionLoaded.Invoke(this);
        }
        
    }

}