// Decompiled with JetBrains decompiler
// Type: Terraria.GameContent.Biomes.GraniteBiome
// Assembly: Terraria, Version=1.4.0.5, Culture=neutral, PublicKeyToken=null
// MVID: 67F9E73E-0A81-4937-A22C-5515CD405A83
// Assembly location: C:\Users\mikeyisbaeyt\Downloads\depotdownloader-2.4.5\depots\105601\6707058\Terraria.exe

using Microsoft.Xna.Framework;
using System;
using System.Collections.Generic;
using Terraria.DataStructures;
using Terraria.ID;
using Terraria.Utilities;
using Terraria.WorldBuilding;

namespace Terraria.GameContent.Biomes
{
  public class GraniteBiome : MicroBiome
  {
    private const int MAX_MAGMA_ITERATIONS = 300;
    private GraniteBiome.Magma[,] _sourceMagmaMap = new GraniteBiome.Magma[200, 200];
    private GraniteBiome.Magma[,] _targetMagmaMap = new GraniteBiome.Magma[200, 200];
    private static Vector2[] _normalisedVectors = new Vector2[9]
    {
      Vector2.Normalize(new Vector2(-1f, -1f)),
      Vector2.Normalize(new Vector2(-1f, 0.0f)),
      Vector2.Normalize(new Vector2(-1f, 1f)),
      Vector2.Normalize(new Vector2(0.0f, -1f)),
      new Vector2(0.0f, 0.0f),
      Vector2.Normalize(new Vector2(0.0f, 1f)),
      Vector2.Normalize(new Vector2(1f, -1f)),
      Vector2.Normalize(new Vector2(1f, 0.0f)),
      Vector2.Normalize(new Vector2(1f, 1f))
    };

    public static bool CanPlace(Point origin, StructureMap structures) => !WorldGen.BiomeTileCheck(origin.X, origin.Y) && !GenBase._tiles[origin.X, origin.Y].active();

    public override bool Place(Point origin, StructureMap structures)
    {
      if (GenBase._tiles[origin.X, origin.Y].active())
        return false;
      origin.X -= this._sourceMagmaMap.GetLength(0) / 2;
      origin.Y -= this._sourceMagmaMap.GetLength(1) / 2;
      this.BuildMagmaMap(origin);
      Microsoft.Xna.Framework.Rectangle effectedMapArea;
      this.SimulatePressure(out effectedMapArea);
      this.PlaceGranite(origin, effectedMapArea);
      this.CleanupTiles(origin, effectedMapArea);
      this.PlaceDecorations(origin, effectedMapArea);
      structures.AddStructure(effectedMapArea, 8);
      return true;
    }

    private void BuildMagmaMap(Point tileOrigin)
    {
      this._sourceMagmaMap = new GraniteBiome.Magma[200, 200];
      this._targetMagmaMap = new GraniteBiome.Magma[200, 200];
      for (int index1 = 0; index1 < this._sourceMagmaMap.GetLength(0); ++index1)
      {
        for (int index2 = 0; index2 < this._sourceMagmaMap.GetLength(1); ++index2)
        {
          int i = index1 + tileOrigin.X;
          int j = index2 + tileOrigin.Y;
          this._sourceMagmaMap[index1, index2] = GraniteBiome.Magma.CreateEmpty(WorldGen.SolidTile(i, j) ? 4f : 1f);
          this._targetMagmaMap[index1, index2] = this._sourceMagmaMap[index1, index2];
        }
      }
    }

    private void SimulatePressure(out Microsoft.Xna.Framework.Rectangle effectedMapArea)
    {
      int length1 = this._sourceMagmaMap.GetLength(0);
      int length2 = this._sourceMagmaMap.GetLength(1);
      int index1 = length1 / 2;
      int index2 = length2 / 2;
      int num1 = index1;
      int min1 = num1;
      int num2 = index2;
      int min2 = num2;
      for (int index3 = 0; index3 < 300; ++index3)
      {
        for (int index4 = num1; index4 <= min1; ++index4)
        {
          for (int index5 = num2; index5 <= min2; ++index5)
          {
            GraniteBiome.Magma sourceMagma1 = this._sourceMagmaMap[index4, index5];
            if (sourceMagma1.IsActive)
            {
              float num3 = 0.0f;
              Vector2 zero = Vector2.Zero;
              for (int index6 = -1; index6 <= 1; ++index6)
              {
                for (int index7 = -1; index7 <= 1; ++index7)
                {
                  if (index6 != 0 || index7 != 0)
                  {
                    Vector2 normalisedVector = GraniteBiome._normalisedVectors[(index6 + 1) * 3 + (index7 + 1)];
                    GraniteBiome.Magma sourceMagma2 = this._sourceMagmaMap[index4 + index6, index5 + index7];
                    if ((double) sourceMagma1.Pressure > 0.00999999977648258 && !sourceMagma2.IsActive)
                    {
                      if (index6 == -1)
                        num1 = Utils.Clamp<int>(index4 + index6, 1, num1);
                      else
                        min1 = Utils.Clamp<int>(index4 + index6, min1, length1 - 2);
                      if (index7 == -1)
                        num2 = Utils.Clamp<int>(index5 + index7, 1, num2);
                      else
                        min2 = Utils.Clamp<int>(index5 + index7, min2, length2 - 2);
                      this._targetMagmaMap[index4 + index6, index5 + index7] = sourceMagma2.ToFlow();
                    }
                    float pressure = sourceMagma2.Pressure;
                    num3 += pressure;
                    zero += pressure * normalisedVector;
                  }
                }
              }
              float num4 = num3 / 8f;
              if ((double) num4 > (double) sourceMagma1.Resistance)
              {
                float num5 = zero.Length() / 8f;
                float pressure = Math.Max(0.0f, (float) ((double) Math.Max(num4 - num5 - sourceMagma1.Pressure, 0.0f) + (double) num5 + (double) sourceMagma1.Pressure * 0.875) - sourceMagma1.Resistance);
                this._targetMagmaMap[index4, index5] = GraniteBiome.Magma.CreateFlow(pressure, Math.Max(0.0f, sourceMagma1.Resistance - pressure * 0.02f));
              }
            }
          }
        }
        if (index3 < 2)
          this._targetMagmaMap[index1, index2] = GraniteBiome.Magma.CreateFlow(25f);
        Utils.Swap<GraniteBiome.Magma[,]>(ref this._sourceMagmaMap, ref this._targetMagmaMap);
      }
      effectedMapArea = new Microsoft.Xna.Framework.Rectangle(num1, num2, min1 - num1 + 1, min2 - num2 + 1);
    }

    private bool ShouldUseLava(Point tileOrigin)
    {
      int length1 = this._sourceMagmaMap.GetLength(0);
      int length2 = this._sourceMagmaMap.GetLength(1);
      int num1 = length1 / 2;
      int num2 = length2 / 2;
      if (tileOrigin.Y + num2 <= WorldGen.lavaLine - 30)
        return false;
      for (int index1 = -50; index1 < 50; ++index1)
      {
        for (int index2 = -50; index2 < 50; ++index2)
        {
          if (GenBase._tiles[tileOrigin.X + num1 + index1, tileOrigin.Y + num2 + index2].active())
          {
            switch (GenBase._tiles[tileOrigin.X + num1 + index1, tileOrigin.Y + num2 + index2].type)
            {
              case 147:
              case 161:
              case 162:
              case 163:
              case 200:
                return false;
              default:
                continue;
            }
          }
        }
      }
      return true;
    }

    private void PlaceGranite(Point tileOrigin, Microsoft.Xna.Framework.Rectangle magmaMapArea)
    {
      bool flag = this.ShouldUseLava(tileOrigin);
      ushort type = 368;
      ushort num = 180;
      if (WorldGen.drunkWorldGen)
      {
        type = (ushort) 367;
        num = (ushort) 178;
      }
      for (int left = magmaMapArea.Left; left < magmaMapArea.Right; ++left)
      {
        for (int top = magmaMapArea.Top; top < magmaMapArea.Bottom; ++top)
        {
          GraniteBiome.Magma sourceMagma = this._sourceMagmaMap[left, top];
          if (sourceMagma.IsActive)
          {
            Tile tile = GenBase._tiles[tileOrigin.X + left, tileOrigin.Y + top];
            if ((double) Math.Max(1f - Math.Max(0.0f, (float) (Math.Sin((double) (tileOrigin.Y + top) * 0.400000005960464) * 0.699999988079071 + 1.20000004768372) * (float) (0.200000002980232 + 0.5 / Math.Sqrt((double) Math.Max(0.0f, sourceMagma.Pressure - sourceMagma.Resistance)))), sourceMagma.Pressure / 15f) > 0.349999994039536 + (WorldGen.SolidTile(tileOrigin.X + left, tileOrigin.Y + top) ? 0.0 : 0.5))
            {
              if (TileID.Sets.Ore[(int) tile.type])
                tile.ResetToType(tile.type);
              else
                tile.ResetToType(type);
              tile.wall = num;
            }
            else if ((double) sourceMagma.Resistance < 0.00999999977648258)
            {
              WorldUtils.ClearTile(tileOrigin.X + left, tileOrigin.Y + top);
              tile.wall = num;
            }
            if (tile.liquid > (byte) 0 & flag)
              tile.liquidType(1);
          }
        }
      }
    }

    private void CleanupTiles(Point tileOrigin, Microsoft.Xna.Framework.Rectangle magmaMapArea)
    {
      ushort num1 = 180;
      if (WorldGen.drunkWorldGen)
        num1 = (ushort) 178;
      List<Point16> point16List = new List<Point16>();
      for (int left = magmaMapArea.Left; left < magmaMapArea.Right; ++left)
      {
        for (int top = magmaMapArea.Top; top < magmaMapArea.Bottom; ++top)
        {
          if (this._sourceMagmaMap[left, top].IsActive)
          {
            int num2 = 0;
            int num3 = left + tileOrigin.X;
            int num4 = top + tileOrigin.Y;
            if (WorldGen.SolidTile(num3, num4))
            {
              for (int index1 = -1; index1 <= 1; ++index1)
              {
                for (int index2 = -1; index2 <= 1; ++index2)
                {
                  if (WorldGen.SolidTile(num3 + index1, num4 + index2))
                    ++num2;
                }
              }
              if (num2 < 3)
                point16List.Add(new Point16(num3, num4));
            }
          }
        }
      }
      foreach (Point16 point16 in point16List)
      {
        int x = (int) point16.X;
        int y = (int) point16.Y;
        WorldUtils.ClearTile(x, y, true);
        GenBase._tiles[x, y].wall = num1;
      }
      point16List.Clear();
    }

    private void PlaceDecorations(Point tileOrigin, Microsoft.Xna.Framework.Rectangle magmaMapArea)
    {
      FastRandom fastRandom1 = new FastRandom(Main.ActiveWorldFileData.Seed).WithModifier(65440UL);
      for (int left = magmaMapArea.Left; left < magmaMapArea.Right; ++left)
      {
        for (int top = magmaMapArea.Top; top < magmaMapArea.Bottom; ++top)
        {
          GraniteBiome.Magma sourceMagma = this._sourceMagmaMap[left, top];
          int index1 = left + tileOrigin.X;
          int index2 = top + tileOrigin.Y;
          if (sourceMagma.IsActive)
          {
            WorldUtils.TileFrame(index1, index2);
            WorldGen.SquareWallFrame(index1, index2);
            FastRandom fastRandom2 = fastRandom1.WithModifier(index1, index2);
            if (fastRandom2.Next(8) == 0 && GenBase._tiles[index1, index2].active())
            {
              if (!GenBase._tiles[index1, index2 + 1].active())
                WorldGen.PlaceUncheckedStalactite(index1, index2 + 1, fastRandom2.Next(2) == 0, fastRandom2.Next(3), false);
              if (!GenBase._tiles[index1, index2 - 1].active())
                WorldGen.PlaceUncheckedStalactite(index1, index2 - 1, fastRandom2.Next(2) == 0, fastRandom2.Next(3), false);
            }
            if (fastRandom2.Next(2) == 0)
              Tile.SmoothSlope(index1, index2);
          }
        }
      }
    }

    private struct Magma
    {
      public readonly float Pressure;
      public readonly float Resistance;
      public readonly bool IsActive;

      private Magma(float pressure, float resistance, bool active)
      {
        this.Pressure = pressure;
        this.Resistance = resistance;
        this.IsActive = active;
      }

      public GraniteBiome.Magma ToFlow() => new GraniteBiome.Magma(this.Pressure, this.Resistance, true);

      public static GraniteBiome.Magma CreateFlow(float pressure, float resistance = 0.0f) => new GraniteBiome.Magma(pressure, resistance, true);

      public static GraniteBiome.Magma CreateEmpty(float resistance = 0.0f) => new GraniteBiome.Magma(0.0f, resistance, false);
    }
  }
}