#include "mxdssubscriber.h"

#include "mxstreamcontroller.h"

DECOMP_SIZE_ASSERT(MxDSSubscriber, 0x4c);

// FUNCTION: LEGO1 0x100b7bb0
MxDSSubscriber::MxDSSubscriber()
{
	m_unk0x48 = -1;
	m_objectId = -1;
	m_pendingChunkCursor = NULL;
	m_consumedChunkCursor = NULL;
}

// FUNCTION: LEGO1 0x100b7e00
MxDSSubscriber::~MxDSSubscriber()
{
	if (m_controller) {
		m_controller->RemoveSubscriber(this);
	}

	DestroyData();

	if (m_pendingChunkCursor) {
		delete m_pendingChunkCursor;
	}
	m_pendingChunkCursor = NULL;

	if (m_consumedChunkCursor) {
		delete m_consumedChunkCursor;
	}
	m_consumedChunkCursor = NULL;
}

// FUNCTION: LEGO1 0x100b7ed0
MxResult MxDSSubscriber::Create(MxStreamController* p_controller, MxU32 p_objectId, MxS16 p_unk0x48)
{
	m_objectId = p_objectId;
	m_unk0x48 = p_unk0x48;

	if (!p_controller) {
		return FAILURE;
	}
	m_controller = p_controller;

	m_pendingChunkCursor = new MxStreamChunkListCursor(&m_pendingChunks);
	if (!m_pendingChunkCursor) {
		return FAILURE;
	}

	m_consumedChunkCursor = new MxStreamChunkListCursor(&m_consumedChunks);
	if (!m_consumedChunkCursor) {
		return FAILURE;
	}

	m_controller->AddSubscriber(this);
	return SUCCESS;
}

// FUNCTION: LEGO1 0x100b8030
void MxDSSubscriber::DestroyData()
{
	if (m_controller) {
		MxStreamChunk* chunk = NULL;

		while (m_pendingChunkCursor->First(chunk)) {
			m_pendingChunkCursor->Detach();
			delete chunk;
		}

		while (m_consumedChunkCursor->First(chunk)) {
			m_consumedChunkCursor->Detach();
			delete chunk;
		}
	}
}

// FUNCTION: LEGO1 0x100b8150
MxResult MxDSSubscriber::AddData(MxStreamChunk* p_chunk, MxBool p_append)
{
	if (m_pendingChunkCursor) {
		if (p_append) {
			m_pendingChunks.Append(p_chunk);
		}
		else {
			m_pendingChunks.Prepend(p_chunk);
		}
	}

	return SUCCESS;
}

// FUNCTION: LEGO1 0x100b8250
MxStreamChunk* MxDSSubscriber::PopData()
{
	MxStreamChunk* chunk = NULL;

	if (m_pendingChunkCursor) {
		m_pendingChunkCursor->First(chunk);
	}

	if (chunk) {
		m_pendingChunkCursor->Detach();
		m_consumedChunks.Append(chunk);
	}

	return chunk;
}

// FUNCTION: LEGO1 0x100b8360
MxStreamChunk* MxDSSubscriber::PeekData()
{
	MxStreamChunk* chunk = NULL;

	if (m_pendingChunkCursor) {
		m_pendingChunkCursor->First(chunk);
	}

	return chunk;
}

// FUNCTION: LEGO1 0x100b8390
void MxDSSubscriber::FreeDataChunk(MxStreamChunk* p_chunk)
{
	if (p_chunk) {
		if (m_consumedChunkCursor->Find(p_chunk)) {
			m_consumedChunkCursor->Detach();
			if (p_chunk) {
				delete p_chunk;
			}
		}
		else if (p_chunk->GetChunkFlags() & DS_CHUNK_BIT1 && p_chunk) {
			delete p_chunk;
		}
	}
}