#include "resourcesmanager.hpp"

#include "resources.hpp"

#include <apps/opencs/model/world/universalid.hpp>

#include <stdexcept>
#include <type_traits>
#include <utility>

CSMWorld::ResourcesManager::ResourcesManager()
    : mVFS(nullptr)
{
}

CSMWorld::ResourcesManager::~ResourcesManager() = default;

void CSMWorld::ResourcesManager::addResources(const Resources& resources)
{
    mResources.insert(std::make_pair(resources.getType(), resources));
    mResources.insert(std::make_pair(UniversalId::getParentType(resources.getType()), resources));
}

const char* const* CSMWorld::ResourcesManager::getMeshExtensions()
{
    // maybe we could go over the osgDB::Registry to list all supported node formats
    static const char* const sMeshTypes[] = { "nif", "osg", "osgt", "osgb", "osgx", "osg2", "dae", 0 };
    return sMeshTypes;
}

void CSMWorld::ResourcesManager::setVFS(const VFS::Manager* vfs)
{
    mVFS = vfs;
    mResources.clear();

    addResources(Resources(vfs, "meshes", UniversalId::Type_Mesh, getMeshExtensions()));
    addResources(Resources(vfs, "icons", UniversalId::Type_Icon));
    addResources(Resources(vfs, "music", UniversalId::Type_Music));
    addResources(Resources(vfs, "sound", UniversalId::Type_SoundRes));
    addResources(Resources(vfs, "textures", UniversalId::Type_Texture));
    addResources(Resources(vfs, "video", UniversalId::Type_Video));
}

const VFS::Manager* CSMWorld::ResourcesManager::getVFS() const
{
    return mVFS;
}

void CSMWorld::ResourcesManager::recreateResources()
{
    std::map<UniversalId::Type, Resources>::iterator it = mResources.begin();
    for (; it != mResources.end(); ++it)
    {
        if (it->first == UniversalId::Type_Mesh)
            it->second.recreate(mVFS, getMeshExtensions());
        else
            it->second.recreate(mVFS);
    }
}

const CSMWorld::Resources& CSMWorld::ResourcesManager::get(UniversalId::Type type) const
{
    std::map<UniversalId::Type, Resources>::const_iterator iter = mResources.find(type);

    if (iter == mResources.end())
        throw std::logic_error("Unknown resource type");

    return iter->second;
}
