using LE_LevelEditor.Core;
using LE_LevelEditor.Events;
using UnityEngine;

namespace LE_LevelEditor.Commands
{
	public class LE_CmdChangeTerrainHeights : LE_CmdBase
	{
		private LE_TerrainManager m_terrainMgr;

		private LE_TerrainManager.HeightData m_heightsDelta;

		public LE_CmdChangeTerrainHeights(LE_TerrainManager p_terrainMgr, LE_TerrainManager.HeightData p_heightsDelta)
		{
			m_terrainMgr = p_terrainMgr;
			m_heightsDelta = p_heightsDelta;
			m_isExecuted = true;
		}

		public override long GetStoredBytes()
		{
			if (m_heightsDelta != null)
			{
				return 20 + 4 * m_heightsDelta.m_heights.Length;
			}
			return 0L;
		}

		public override bool Execute()
		{
			return base.Execute() && Apply(1f);
		}

		public override bool Rollback()
		{
			return base.Rollback() && Apply(-1f);
		}

		private bool Apply(float p_direction)
		{
			if (m_terrainMgr == null || m_heightsDelta == null)
			{
				Debug.LogError("LE_CmdChangeTerrainHeight: Apply: could not execute, m_terrainMgr or m_heightsDelta are null!");
				return false;
			}
			int xBase = m_heightsDelta.m_xBase;
			int yBase = m_heightsDelta.m_yBase;
			int length = m_heightsDelta.m_heights.GetLength(1);
			int length2 = m_heightsDelta.m_heights.GetLength(0);
			if (length > m_terrainMgr.TerrainData.heightmapWidth || length2 > m_terrainMgr.TerrainData.heightmapHeight)
			{
				Debug.LogError("LE_CmdChangeTerrainHeight: Apply: could not execute, terrain height map resolution was reduced in the meantime!");
				return false;
			}
			float[,] heights = m_terrainMgr.TerrainData.GetHeights(xBase, yBase, length, length2);
			for (int i = 0; i < length; i++)
			{
				for (int j = 0; j < length2; j++)
				{
					heights[j, i] += p_direction * m_heightsDelta.m_heights[j, i];
				}
			}
			m_terrainMgr.TerrainData.SetHeights(m_heightsDelta.m_xBase, m_heightsDelta.m_yBase, heights);
			if (LE_EventInterface.OnChangeLevelData != null)
			{
				LE_EventInterface.OnChangeLevelData(m_terrainMgr, new LE_LevelDataChangedEvent(LE_ELevelDataChangeType.TERRAIN_HEIGHTS));
			}
			return true;
		}
	}
}