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

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

		private LE_TerrainManager.AlphamapData m_alphamapsDelta;

		public LE_CmdChangeTerrainAlphamaps(LE_TerrainManager p_terrainMgr, LE_TerrainManager.AlphamapData p_alphamapsDelta)
		{
			m_terrainMgr = p_terrainMgr;
			m_alphamapsDelta = p_alphamapsDelta;
			m_isExecuted = true;
		}

		public override long GetStoredBytes()
		{
			if (m_alphamapsDelta != null)
			{
				return 20 + 4 * m_alphamapsDelta.m_alphamaps.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_alphamapsDelta == null)
			{
				Debug.LogError("LE_CmdChangeTerrainAlphamaps: Apply: could not execute, m_terrainMgr or m_alphamapsDelta are null!");
				return false;
			}
			int xBase = m_alphamapsDelta.m_xBase;
			int yBase = m_alphamapsDelta.m_yBase;
			int length = m_alphamapsDelta.m_alphamaps.GetLength(1);
			int length2 = m_alphamapsDelta.m_alphamaps.GetLength(0);
			int length3 = m_alphamapsDelta.m_alphamaps.GetLength(2);
			if (length > m_terrainMgr.TerrainData.alphamapWidth || length2 > m_terrainMgr.TerrainData.alphamapHeight)
			{
				Debug.LogError("LE_CmdChangeTerrainAlphamaps: Apply: could not execute, terrain alpha map resolution was reduced in the meantime!");
				return false;
			}
			if (length3 > m_terrainMgr.TerrainData.alphamapLayers)
			{
				Debug.LogError("LE_CmdChangeTerrainAlphamaps: Apply: could not execute, terrain alpha map layers count was reduced in the meantime!");
				return false;
			}
			float[,,] alphamaps = m_terrainMgr.TerrainData.GetAlphamaps(xBase, yBase, length, length2);
			for (int i = 0; i < length; i++)
			{
				for (int j = 0; j < length2; j++)
				{
					for (int k = 0; k < length3; k++)
					{
						alphamaps[j, i, k] += p_direction * m_alphamapsDelta.m_alphamaps[j, i, k];
					}
				}
			}
			m_terrainMgr.TerrainData.SetAlphamaps(m_alphamapsDelta.m_xBase, m_alphamapsDelta.m_yBase, alphamaps);
			if (LE_EventInterface.OnChangeLevelData != null)
			{
				LE_EventInterface.OnChangeLevelData(m_terrainMgr, new LE_LevelDataChangedEvent(LE_ELevelDataChangeType.TERRAIN_ALPHAMAPS));
			}
			return true;
		}
	}
}