/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2022                                                               *
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 * or substantial portions of the Software.                                              *
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#include <modules/softwareintegration/syncablefloatdatastorage.h>

#include <modules/softwareintegration/utils.h>
#include <openspace/util/syncbuffer.h>

#include <ghoul/logging/logmanager.h>


namespace {
	constexpr const char* _loggerCat = "SyncableFloatDataStorage";
} // namespace

namespace openspace {

using namespace softwareintegration;

/* ============== SyncEngine functions ============== */
void SyncableFloatDataStorage::encode(SyncBuffer* syncBuffer) {
	// ZoneScoped

	std::lock_guard guard(_mutex);

	syncBuffer->encode(_storageDirty);
	if (!_storageDirty) return;
	
	size_t nDataEntries = _storage.size();
	syncBuffer->encode(nDataEntries);

	for (auto& [key, value] : _storage) {
		syncBuffer->encode(value.syncDirty);
		// Only encode data if it is dirty, to save bandwidth
		if (!value.syncDirty) continue;

		syncBuffer->encode(key);

		// Go trough all data in data entry. 
		// Sequentially structured as: x1, y1, z1, x2, y2, z2...
		size_t nItemsInDataEntry = value.data.size();
		syncBuffer->encode(nItemsInDataEntry);
		// syncBuffer->encode(value.data);

		for (auto val : value.data) {
			syncBuffer->encode(val);
		}

		value.syncDirty = false;
	}
}

void SyncableFloatDataStorage::decode(SyncBuffer* syncBuffer) {
    std::lock_guard guard(_mutex);

	bool storageDirty;
	syncBuffer->decode(storageDirty);
	if (!storageDirty) return;
	
	size_t nDataEntries;
	syncBuffer->decode(nDataEntries);

	for (size_t i = 0; i < nDataEntries; ++i) {
		bool dirty;
		syncBuffer->decode(dirty);
		if (!dirty) continue;

		std::string key;
		syncBuffer->decode(key);

		size_t nItemsInDataEntry;
		syncBuffer->decode(nItemsInDataEntry);
		
		std::vector<float> dataEntry{};
		// dataEntry.resize(nItemsInDataEntry);
		// syncBuffer->decode(dataEntry);
		dataEntry.reserve(nItemsInDataEntry);
		for (size_t j = 0; j < nItemsInDataEntry; ++j) {
			float value;
			syncBuffer->decode(value);
			dataEntry.push_back(std::move(value));
		}

		insertAssign(key, Value{ dataEntry });
	}
}

void SyncableFloatDataStorage::postSync(bool isMaster) {
	std::lock_guard guard(_mutex);
	if (isMaster) {
		bool nothingDirty = true;
		for (auto& [key, value] : _storage) {
			if (value.syncDirty) {
				nothingDirty = false;
				break;
			}
		}

		if (nothingDirty) {
			_storageDirty = false;
		}
	}
}

/* ================================================== */

const SyncableFloatDataStorage::ValueData& SyncableFloatDataStorage::fetch(const Key& key) {
	LDEBUG(fmt::format("Loading data from float data storage: {} ms", key));
	std::lock_guard guard(_mutex);
	auto it = find(key);
	if (it == end()) {
		LERROR(fmt::format(
				"Could not find data with key '{}' in the centralized data storage", key
		));
		return ValueData{};
	}

	it->second.dirty = false;

	return it->second.data;
}

bool SyncableFloatDataStorage::isDirty(const Key& key) {
	auto it = find(key);
	if (it == end()) {
		return false;
	}

	return it->second.dirty;
}

bool SyncableFloatDataStorage::isSyncDirty(const Key& key) {
	auto it = find(key);
	if (it == end()) {
		return false;
	}

	return it->second.syncDirty;
}

void SyncableFloatDataStorage::store(const Key& key, const ValueData& data) {
	LDEBUG(fmt::format("Storing data in float data storage: {}", key));
	std::lock_guard guard(_mutex);
	insertAssign(key, { data });
	_storageDirty = true;
}

/* =============== Utility functions ================ */
size_t SyncableFloatDataStorage::erase(const SyncableFloatDataStorage::Key& key) {
	return _storage.erase(key);
}

void SyncableFloatDataStorage::insertAssign(Key key, const Value& value) {
	auto it = find(key);
	if (it == end()) {
		_storage.emplace(key, value);
	}
	else {
		it->second = value;
	}
}

SyncableFloatDataStorage::Value& SyncableFloatDataStorage::at(const Key& key) {
	return _storage.at(key);
}

SyncableFloatDataStorage::Iterator SyncableFloatDataStorage::find(const Key& key) {
	return _storage.find(key);
}
/* ================================================== */

/* =================== Iterators ==================== */
SyncableFloatDataStorage::Iterator SyncableFloatDataStorage::end() noexcept {
	return _storage.end();
}
		
SyncableFloatDataStorage::Iterator SyncableFloatDataStorage::begin() noexcept {
	return _storage.begin();
}
/* ================================================== */

} // namespace openspace