using UnityEngine;

namespace AibisDream
{
    public class ShapeRecycleSlot : MonoBehaviour
    {
        public PositionState CurrentState => mover.GetCurrentState();
        [SerializeField] private ThreeStatePositionMover mover;
        [SerializeField] private BoxArea halfArea;
        [SerializeField] private BoxArea openArea;
        [SerializeField] private Transform attachPoint; // 吸附点，如果为空则吸附到(0,0)

        // ----------------------- 回收逻辑 -----------------------
        public void PreRecycle()
        {
            // 回收槽半弹出
            mover.SetToHalf();
            // TODO: 边缘发光提示
        }

        public void OpenForRecycle()
        {
            // 回收槽完全弹出
            mover.SetToOpen();
            // TODO: 边缘发光提示
        }

        public void CloseForRecycle()
        {
            // 回收槽回到半关闭
            mover.SetToHalf();
            // TODO: 边缘发光提示
        }

        public void RecycleShape(BlockShape shape)
        {
            // 将 shape 放到回收槽
            PutShapeInSlot(shape);
            // 播放回收动画
            mover.SetToClose();
            // TODO: 销毁Shape
        }

        // ----------------------- 添加逻辑 -----------------------

        public void PopUpShape(BlockShape shape)
        {
            // 将 shape 添加到回收槽
            PutShapeInSlot(shape);
            // TODO: 播放弹出动画
            mover.SetToOpen();
        }

        // ----------------------- 状态校验 -----------------------

        private bool _isRecycleAvaliable = false;

        public void SetRecycleAvaliable(bool isAvaliable)
        {
            _isRecycleAvaliable = isAvaliable;
        }

        /// <summary>
        /// 当物体拖动时，更新回收槽状态
        /// </summary>
        public void UpdateSlotState(IBlockShape shape)
        {
            // 如果回收槽不可用或者正在移动，则不更新状态
            if (!_isRecycleAvaliable || mover.IsMoving) return;

            // 开启状态下的判断
            if (mover.GetCurrentState() == PositionState.Open)
            {
                if (!openArea.Contains(shape.GetGlobalCenterPosition()))
                {
                    CloseForRecycle();
                }
                return;
            }

            // 半关闭状态下的判断
            if (mover.GetCurrentState() == PositionState.Half)
            {
                if (halfArea.Contains(shape.GetGlobalCenterPosition()))
                {
                    OpenForRecycle();
                }
            }
        }

        private void PutShapeInSlot(BlockShape shape)
        {
            shape.transform.SetParent(mover.transform);
            Vector3 centerPosition = shape.GetCenterPosition();

            // 如果有配置吸附点，则吸附到吸附点；否则吸附到(0,0)
            if (attachPoint != null)
            {
                // 吸附点挂在mover下面，直接使用本地坐标
                shape.transform.localPosition = attachPoint.localPosition - centerPosition;
            }
            else
            {
                // 默认行为：吸附到(0,0)
                shape.transform.localPosition = -centerPosition;
            }
        }
    }
}