#include "Dimension.h"
#include "Constants.h"
#include "Datei.h"
#include "Game.h"
#include "Globals.h"
#include "World.h"

using namespace Framework;

Dimension::Dimension()
	: chunks(new Trie<Chunk>()),
	entities(new RCArray<Entity>())
{}

Dimension::~Dimension()
{
	entities->release();
	chunks->release();
}

void Dimension::getAddrOf(Punkt cPos, char* addr) const
{
	*(int*)addr = cPos.x;
	*((int*)addr + 1) = cPos.y;
}

void Dimension::getAddrOfWorld(Punkt wPos, char* addr) const
{
	if (wPos.x < 0)
		wPos.x -= CHUNK_SIZE;
	if (wPos.y < 0) // needed because otherwise would (-8, -8) have the same adress as (8, 8)
		wPos.y -= CHUNK_SIZE;
	wPos /= CHUNK_SIZE;
	getAddrOf(wPos, addr);
}

void Dimension::api(char* message)
{
	switch (message[0])
	{
	case 1: // chunck
	{
		int cX = *(int*)(message + 1);
		int cY = *(int*)(message + 5);
		Chunk* ch = zChunk(Punkt(cX, cY));
		if (ch)
			ch->api(message + 9);
		break;
	}
	case 2: // entity
	{
		int eId = *(int*)(message + 1);
		Entity* e = zEntity(eId);
		if (e)
			e->api(message + 5);
		break;
	}
	case 3: // block
	{
		int px = *(int*)(message + 1);
		int py = *(int*)(message + 5);
		int pz = *(int*)(message + 9);
		Block* b = zBlock(Framework::Vec3<int>(px, py, pz));
		if (b)
			b->api(message + 13);
		break;
	}
	case 4: // add new chunck
	{
		Punkt center;
		center.x = *(int*)(message + 1);
		center.y = *(int*)(message + 5);
		ByteArrayReader reader(message + 9, INT_MAX, 0);
		std::cout << "downloading chunk " << center.x << ", " << center.y << "\n";
		ZeitMesser zm;
		zm.messungStart();
		Chunk* chunk = new Chunk(center);
		chunk->load(&reader);
		zm.messungEnde();
		std::cout << "chunk loading took " << zm.getSekunden() << " seconds\n";
		setChunk(chunk, center);
		World::INSTANCE->onChunkAdded(center);
		break;
	}
	}
}

Chunk* Dimension::zChunk(Punkt wPos) const
{
	char addr[8];
	getAddrOfWorld(wPos, addr);
	return chunks->z(addr, 8);
}

Block* Dimension::zBlock(Vec3<int> location)
{
	Chunk* c = zChunk(World::INSTANCE->getChunkCenter(location.x, location.y));
	if (c)
		return c->zBlockAt(location);
	return 0;
}

Block* Dimension::getBlock(Vec3<int> location)
{
	cs.lock();
	Chunk* c = zChunk(World::INSTANCE->getChunkCenter(location.x, location.y));
	if (c)
	{
		Block* b = c->zBlockAt(location);
		b = b ? dynamic_cast<Block*>(b->getThis()) : 0;
		cs.unlock();
		return b;
	}
	cs.unlock();
	return 0;
}

void Dimension::addEntity(Entity* entity)
{
	entities->add(entity);
	World::INSTANCE->setVisibility(entity, 1);
}

void Dimension::setChunk(Chunk* chunk, Punkt center)
{
	char addr[8];
	getAddrOfWorld(center, addr);
	Chunk* old = chunks->z(addr, 8);
	cs.lock();
	if (old)
	{
		World::INSTANCE->setVisibility(old, 0);
		int index = 0;
		for (auto iterator = chunkList.begin(); iterator; ++iterator, ++index)
		{
			if ((Chunk*)iterator == old)
			{
				if (chunk)
					iterator.set(chunk);
				else
					chunkList.remove(index);
				break;
			}
		}
	}
	else if (chunk)
		chunkList.add(chunk);
	chunks->set(addr, 8, chunk);
	if (chunk)
		chunk->getThis();
	cs.unlock();
	if (chunk)
	{
		World::INSTANCE->setVisibility(chunk, 1);
		chunk->release();
	}
}

bool Dimension::hasChunck(int x, int y) const
{
	return zChunk(Punkt(x, y));
}

void Dimension::removeDistantChunks(Punkt wPos)
{
	Array<int> removed;
	int index = 0;
	for (Chunk* chunk : chunkList)
	{
		if ((chunk->getCenter() - wPos).getLength() > MAX_VIEW_DISTANCE * 2)
			removed.add(index, 0);
		index++;
	}
	for (int i : removed)
	{
		Chunk* chunk = chunkList.get(i);
		World::INSTANCE->setVisibility(chunk, 0);
		setChunk(0, chunk->getCenter());
	}
}

void Dimension::setBlock(Block* block)
{
	cs.lock();
	Chunk* c = zChunk(World::INSTANCE->getChunkCenter((int)floor(block->getPos().x), (int)floor(block->getPos().y)));
	if (c)
		c->setBlock(block);
	else
		block->release();
	cs.unlock();
}

void Dimension::removeBlock(Block* zBlock)
{
	cs.lock();
	Chunk* c = zChunk(World::INSTANCE->getChunkCenter((int)floor(zBlock->getPos().x), (int)floor(zBlock->getPos().y)));
	if (c)
		c->removeBlock(zBlock);
	cs.unlock();
}

Entity* Dimension::zEntity(int id)
{
	cs.lock();
	for (Entity* e : *entities)
	{
		if (e->getId() == id)
		{
			cs.unlock();
			return e;
		}
	}
	cs.unlock();
	return 0;
}

Entity* Dimension::getEntity(int id)
{
	cs.lock();
	for (Entity* e : *entities)
	{
		if (e->getId() == id)
		{
			Entity* result = dynamic_cast<Entity*>(e->getThis());
			cs.unlock();
			return result;
		}
	}
	cs.unlock();
	return 0;
}

void Dimension::removeEntity(int id)
{
	World::INSTANCE->lockWorld();
	cs.lock();
	int index = 0;
	for (Entity* e : *entities)
	{
		if (e->getId() == id)
		{
			World::INSTANCE->setVisibility(e, 0);
			entities->remove(index);
			cs.unlock();
			World::INSTANCE->unlockWorld();
			return;
		}
		index++;
	}
	cs.unlock();
	World::INSTANCE->unlockWorld();
}