#include "world.h"

World::World() {}

World::~World() {}

Array2d<Chunk*>& World::GetChunks() { return m_chunks; }

Chunk* World::ChunkAt(float x, float y, float z) const {
	int cx = (int)x / CHUNK_SIZE_X;
	int cz = (int)z / CHUNK_SIZE_Z;

	if (x < 0 || y < 0 || z < 0 ||
		x >= WORLD_SIZE_X * CHUNK_SIZE_X ||
		z >= CHUNK_SIZE_Z * WORLD_SIZE_Y ||
		y > CHUNK_SIZE_Y)
		return 0;

	return m_chunks.Get(cx, cz);
}

Chunk* World::ChunkAt(const Vector3f& pos) const { return ChunkAt(pos.x, pos.y, pos.z); }

BlockType World::BlockAt(float x, float y, float z, BlockType defaultBlockType) const {
	Chunk* c = ChunkAt(x, y, z);

	if (!c)
		return defaultBlockType;

	int bx = (int)x % CHUNK_SIZE_X;
	int by = (int)y % CHUNK_SIZE_Y;
	int bz = (int)z % CHUNK_SIZE_Z;

	return c->GetBlock(bx, by, bz);
}

BlockType World::BlockAt(const Vector3f& pos, BlockType defaultBlockType) const {
	return BlockAt(pos.x, pos.y, pos.z, defaultBlockType);
}

void World::GetScope(unsigned int& x, unsigned int& y) {
	x = m_center[0];
	y = m_center[1];
}

void World::ChangeBlockAtPosition(BlockType blockType, Vector3f pos) {
	int bx = (int)pos.x % CHUNK_SIZE_X;
	int by = (int)pos.y % CHUNK_SIZE_Y;
	int bz = (int)pos.z % CHUNK_SIZE_Z;

	ChunkAt(pos)->SetBlock(bx, by, bz, blockType, this);
}

void World::ChangeBlockAtCursor(BlockType blockType, Player& player, bool& block) {
	Vector3f currentPos = player.GetPosition();
	Vector3f currentBlock = currentPos;
	Vector3f ray = player.GetDirection();
	bool found = false;

	if (block) return;

	while ((currentPos - currentBlock).Length() <= MAX_SELECTION_DISTANCE && !found) {
		currentBlock += ray / 10.f;

		BlockType bt = BlockAt(currentBlock);

		if (bt != BTYPE_AIR)
			found = true;
	}

	if (found)
		if (blockType != BTYPE_AIR) {
			found = false;
			while ((currentPos - currentBlock).Length() >= 1.7f && !found) {
				currentBlock -= ray / 10.f;

				BlockType bt = BlockAt(currentBlock);

				if (bt == BTYPE_AIR) { // V?rification pour ?tre s?r que le bloc ? changer n'est pas dans le joueur.
					int Bx = (int)currentBlock.x;
					int By = (int)currentBlock.y;
					int Bz = (int)currentBlock.z;

					int Px = (int)currentPos.x;
					int PyA = (int)currentPos.y;
					int PyB = (int)(currentPos.y - .9f);
					int PyC = (int)(currentPos.y - 1.7f);
					int Pz = (int)currentPos.z;

					if (!(Bx == Px &&
						(By == PyA ||
							By == PyB ||
							By == PyC) &&
						Bz == Pz))
						found = true;
				}
			}
		}

	if (found && (int)currentBlock.y < CHUNK_SIZE_Y) {
		int bx = (int)currentBlock.x % CHUNK_SIZE_X;
		int by = (int)currentBlock.y % CHUNK_SIZE_Y;
		int bz = (int)currentBlock.z % CHUNK_SIZE_Z;

		ChunkAt(currentBlock)->SetBlock(bx, by, bz, blockType, this);
		ChunkAt(currentBlock)->MakeModified();
		block = true;
	}
}