#include "HydraLightBufferManager.h"

void HydraLightBufferManager::Initialise()
{
    m_light_lookup.resize(MAX_LIGHTS);
    m_lights.resize(MAX_LIGHTS);
    for(uint32_t i = 0; i < MAX_LIGHTS; i ++)
    {
        m_available_lights.push(i);
    }
}

void HydraLightBufferManager::Shutdown()
{
}

HydraID HydraLightBufferManager::CreateLight(HydraLightBuffer light_buffer)
{
    std::lock_guard<std::mutex> lock(m_mutex);
    if(m_available_lights.size() > 0)
    {
        HydraID light_id = m_available_lights.front();
        m_available_lights.pop();
        m_lights[m_light_count] = light_buffer;
        m_light_lookup[light_id] = m_light_count;
        m_light_count++;
        return light_id;
    }

    return INVALID_HYDRA_ID;
}

HydraLightBuffer *const HydraLightBufferManager::GetLightBufferBase()
{
    return &m_lights[0];
}

HydraLightBuffer &HydraLightBufferManager::GetLightBuffer(HydraID light_id)
{
    HydraID light_idx = m_light_lookup[light_id];
    return m_lights[light_idx];
}

uint32_t HydraLightBufferManager::GetLightCount()
{
    return m_light_count;
}