using System;
using UnityEngine;

// Filename : CLayerMap.cs
// Creator  : ported from C++ (AutoPFImp/AutoMoveImp/LayerMap.*)
// Date     : 2026/01/09

namespace AutoMove
{
    /// <summary>
    /// Layer move map (RMap + DHMap).
    /// 分层移动图（RMap + DHMap）。
    /// </summary>
    public class CLayerMap
    {
        private CBitImage m_pRMap;
        private CBlockImageFix16 m_pDHMap;

        public CBitImage GetRMap() => m_pRMap;
        public CBlockImageFix16 GetDHMap() => m_pDHMap;

        public void Release()
        {
            m_pRMap = null;
            m_pDHMap = null;
        }

        public bool LoadRMap(byte[] prmapBytes)
        {
            m_pRMap = new CBitImage();
            if (!m_pRMap.Load(prmapBytes))
            {
                m_pRMap = null;
                return false;
            }
            return true;
        }

        public bool LoadDHMap(byte[] pdhmapBytes)
        {
            m_pDHMap = new CBlockImageFix16(0, 4);
            if (!m_pDHMap.Load(pdhmapBytes))
            {
                m_pDHMap = null;
                return false;
            }
            return true;
        }

        public float GetDH(int x, int y)
        {
            // NOTE: DHMap stores FIX16 (10.6) as short; float = value / 64.
            // 注意：DHMap 以 FIX16(10.6) short 存储；float = value / 64。
            if (m_pDHMap == null) return 0.0f;
            short fix = m_pDHMap.GetPixel(x, y);
            return fix / 64.0f;
        }
    }
}