using System;
using System.Collections.Generic;
using UnityEngine;
using AibisDream.Framework;
using AibisDream.Utility;

namespace AibisDream
{
    public class ShapeFactory
    {
        private Transform _shapeRoot;
        private GameObject _blockShapePrefab;

        private List<BlockShape> _blockShapeList = new List<BlockShape>();

        public event Action<IBlockShape> OnDragStart;
        public event Action<IBlockShape, bool> OnDragEnd;
        public event Action<IBlockShape> OnDragUpdate;

        public ShapeFactory(Transform shapeRoot)
        {
            _shapeRoot = shapeRoot;
            _blockShapePrefab = ResourceKit.LoadAssetSync<GameObject>(ConstRef.BlockShapePrefab);
            _blockShapeList = new List<BlockShape>();
        }

        public BlockShape CreateBlockShape(BlockShapeData blockShapeData)
        {
            var blockShape = UnityEngine.Object.Instantiate(_blockShapePrefab, _shapeRoot).GetComponent<BlockShape>();
            blockShape.Init(blockShapeData);
            _blockShapeList.Add(blockShape);

            // 注册事件
            var dragger = blockShape.GetComponent<ShapeDragger>();
            dragger.OnDragStart += OnShapeDragStart;
            dragger.OnDragEnd += OnShapeDragEnd;
            dragger.OnDragUpdate += OnShapeDragUpdate;

            return blockShape;
        }

        private void OnShapeDragStart(IBlockShape blockShape)
        {
            blockShape.ShapeDragger.transform.SetParent(_shapeRoot);
            OnDragStart?.Invoke(blockShape);
        }

        private void OnShapeDragEnd(IBlockShape blockShape, bool isPlaced)
        {
            OnDragEnd?.Invoke(blockShape, isPlaced);
        }

        private void OnShapeDragUpdate(IBlockShape blockShape)
        {
            OnDragUpdate?.Invoke(blockShape);
        }

        public BlockShape CreateBlockShape(string key)
        {
            if (string.IsNullOrEmpty(key))
            {
                return UnityEngine.Object.Instantiate(_blockShapePrefab, _shapeRoot).GetComponent<BlockShape>();
            }

            if (!BlockPuzzleKit.TryLoadBlockShapeData(key, out var blockShapeData))
            {
                Debug.LogError($"获取配置信息失败: {key}");
                return null;
            }
            return CreateBlockShape(blockShapeData);
        }

        public void RecycleBlockShape(BlockShape blockShape)
        {
            _blockShapeList.Remove(blockShape);
            UnityEngine.Object.Destroy(blockShape.gameObject);
        }

        /// <summary>
        /// 批量设置所有形状的可拖拽状态
        /// </summary>
        /// <param name="draggable">是否可拖拽</param>
        public void SetAllShapesDraggable(bool draggable)
        {
            foreach (var shape in _blockShapeList)
            {
                if (shape != null && shape.ShapeDragger != null)
                {
                    shape.ShapeDragger.IsDraggable = draggable;
                }
            }
        }
    }
}