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#pragma once





namespace PoweredRailHandler
{
/** Get the offset along which the rail faces.
Not in cBlockRailHandler since specific to powered rails. */
static Vector3i GetPoweredRailAdjacentXZCoordinateOffset(NIBBLETYPE a_Meta)
{
	switch (a_Meta & 0x7)
	{
		case E_META_RAIL_ZM_ZP:     return {0, 0, 1};
		case E_META_RAIL_XM_XP:     return {1, 0, 0};
		case E_META_RAIL_ASCEND_XP: return {1, 1, 0};
		case E_META_RAIL_ASCEND_XM: return {1, 1, 0};
		case E_META_RAIL_ASCEND_ZM: return {0, 1, 1};
		case E_META_RAIL_ASCEND_ZP: return {0, 1, 1};
		default:
		{
			ASSERT(!"Impossible rail meta! wat wat wat");
			return {0, 0, 0};
		}
	}
}

static PowerLevel GetPowerDeliveredToPosition(
	const cChunk & a_Chunk,
	Vector3i a_Position,
	BLOCKTYPE a_BlockType,
	Vector3i a_QueryPosition,
	BLOCKTYPE a_QueryBlockType,
	bool IsLinked
)
{
	UNUSED(a_QueryBlockType);

	const auto Meta = a_Chunk.GetMeta(a_Position);
	const auto Offset = GetPoweredRailAdjacentXZCoordinateOffset(Meta);
	if (((Offset + a_Position) == a_QueryPosition) || ((-Offset + a_Position) == a_QueryPosition))
	{
		const auto Power = DataForChunk(a_Chunk).GetCachedPowerData(a_Position);
		return (Power <= 7) ? 0 : (Power - 1);
	}
	return 0;
}

static void Update(
	cChunk & a_Chunk,
	cChunk & CurrentlyTickingChunk,
	Vector3i a_Position,
	BLOCKTYPE a_BlockType,
	NIBBLETYPE a_Meta,
	const PowerLevel Power
)
{
	// LOGD("Evaluating tracky the rail (%d %d %d)", a_Position.x, a_Position.y, a_Position.z);

	switch (a_BlockType)
	{
		case E_BLOCK_DETECTOR_RAIL:
		{
			/*
			if ((m_Chunk->GetMeta(a_RelBlockX, a_RelBlockY, a_RelBlockZ) & 0x08) == 0x08)
			{
				SetAllDirsAsPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, a_MyType);
			}
			*/
			return;
		}
		case E_BLOCK_ACTIVATOR_RAIL:
		case E_BLOCK_POWERED_RAIL:
		{
			const auto Offset = GetPoweredRailAdjacentXZCoordinateOffset(a_Meta);
			if (Power != DataForChunk(a_Chunk).ExchangeUpdateOncePowerData(a_Position, Power))
			{
				a_Chunk.SetMeta(a_Position, (Power == 0) ? (a_Meta & 0x07) : (a_Meta | 0x08));

				UpdateAdjustedRelative(a_Chunk, CurrentlyTickingChunk, a_Position, Offset);
				UpdateAdjustedRelative(a_Chunk, CurrentlyTickingChunk, a_Position, -Offset);
			}

			return;
		}
		default:
		{
			ASSERT(!"Unhandled type of rail in passed to rail handler!");
		}
	}
}

static void ForValidSourcePositions(
	const cChunk & a_Chunk,
	Vector3i a_Position,
	BLOCKTYPE a_BlockType,
	NIBBLETYPE a_Meta,
	ForEachSourceCallback & Callback
)
{
	UNUSED(a_Chunk);
	UNUSED(a_Meta);

	if ((a_BlockType == E_BLOCK_POWERED_RAIL) || (a_BlockType == E_BLOCK_ACTIVATOR_RAIL))
	{
		InvokeForAdjustedRelatives(Callback, a_Position, RelativeAdjacents);
	}
}
};  // namespace PoweredRailHandler