#include "../../Platform/stdafx.h"
#include "../../Util/PortableFileIO.h"
#include "../../Headers/net.minecraft.world.level.biome.h"
#include "../../Headers/net.minecraft.world.level.newbiome.layer.h"
#include "../../Headers/net.minecraft.world.level.h"
#include "BiomeOverrideLayer.h"


BiomeOverrideLayer::BiomeOverrideLayer(int seedMixup) : Layer(seedMixup)
{
	m_biomeOverride = byteArray( width * height );

#ifdef _WINDOWS64
	const std::wstring path = L"GameRules\\biomemap.bin";
#else
	const std::wstring path = L"GAME:\\GameRules\\biomemap.bin";
#endif
	const PortableFileIO::BinaryReadResult readResult = PortableFileIO::ReadBinaryFile(path, m_biomeOverride.data, m_biomeOverride.length);
	if(readResult.status == PortableFileIO::BinaryReadStatus::not_found)
	{
		app.DebugPrintf("Biome override not found, using plains as default\n");
		memset(m_biomeOverride.data,Biome::plains->id,m_biomeOverride.length);
	}
	else if(readResult.status == PortableFileIO::BinaryReadStatus::too_large)
	{
		app.DebugPrintf("Biomemap binary is too large!!\n");
		__debugbreak();
	}
	else if(readResult.status != PortableFileIO::BinaryReadStatus::ok)
	{
		app.FatalLoadError();
	}
}

intArray BiomeOverrideLayer::getArea(int xo, int yo, int w, int h)
{
	intArray result = IntCache::allocate(w * h);

	int xOrigin = xo + width/2;
	int yOrigin = yo + height/2;
	if(xOrigin < 0 ) xOrigin = 0;
	if(xOrigin >= width) xOrigin = width - 1;
	if(yOrigin < 0 ) yOrigin = 0;
	if(yOrigin >= height) yOrigin = height - 1;
	for (int y = 0; y < h; y++)
	{
		for (int x = 0; x < w; x++)
		{
			int curX = xOrigin + x;
			int curY = yOrigin + y;
			if(curX >= width) curX = width - 1;
			if(curY >= height) curY = height - 1;
			int index = curX + curY * width;

			unsigned char headerValue = m_biomeOverride[index];
			result[x + y * w] = headerValue;
		}
	}
	return result;
}