#pragma once

#include "Export.h"

#include "Core/Singleton.hpp"

#include <cstdint>

#include <memory>

#include <vector>

namespace sh::sound

{

class SoundClip;

class SoundSource;

class SoundSourcePool : public core::Singleton<SoundSourcePool>

{

friend core::Singleton<SoundSourcePool>;

public:

struct Handle

{

static constexpr uint32_t InvalidIndex = static_cast<uint32_t>(-1);

uint32_t index = InvalidIndex;

uint32_t generation = 0;

auto IsValid() const -> bool

{

return index != InvalidIndex;

}

};

public:

SH_SOUND_API auto Acquire(const SoundClip* clip = nullptr) -> Handle;

SH_SOUND_API void Release(Handle handle);

SH_SOUND_API void Clear();

SH_SOUND_API auto GetSource(Handle handle) -> SoundSource*;

SH_SOUND_API auto GetSource(Handle handle) const -> const SoundSource*;

protected:

SH_SOUND_API SoundSourcePool();

SH_SOUND_API ~SoundSourcePool();

private:

void CollectFinishedSources();

auto IsHandleValid(Handle handle) const -> bool;

private:

struct PoolItem;

std::vector<std::unique_ptr<PoolItem>> items;

std::vector<uint32_t> freeIndices;

};

}//namespace