//
//  VROModelIOUtil.h
//  ViroRenderer
//
//  Created by Raj Advani on 5/2/17.
//  Copyright © 2017 Viro Media. All rights reserved.
//

#ifndef VROModelIOUtil_h
#define VROModelIOUtil_h

#include <string>
#include <map>
#include <memory>

class VROTexture;

/*
 The type of file within which the model is stored. On Android, use URL with file:///android-asset/
 to load assets.
 */
enum class VROResourceType {
    LocalFile,        // Local file path
    URL,              // URL (remote or local)
    BundledResource,  // App-bundled resource
};

/*
 Static utilities for Model IO.
 */
class VROModelIOUtil {
    
public:

    /*
     Load the texture with the given name, from the given base path (or base URL). First check
     if the texture exists in the provided resourceMap or cache. If the texture could not be
     loaded, returns an empty shared_ptr.
     
     Set sRGB to true to gamma-uncorrect the texture into linear RGB when sampling. This should
     only be used for color (diffuse) textures, and not for textures that are *already* linear
     (e.g. specular, normal, etc.).
     */
    static std::shared_ptr<VROTexture> loadTexture(const std::string &name, std::string &base, VROResourceType type, bool sRGB,
                                                   const std::map<std::string, std::string> *resourceMap,
                                                   std::map<std::string, std::shared_ptr<VROTexture>> &cache);

    /*
     Copy the resource or map of resources into a location where they can be loaded by the model
     loader, and return the new paths.

     This performs no action on local files.
     */
    static std::string processResource(std::string resource, VROResourceType type, bool *isTemp,
                                       bool *success);
    static std::map<std::string, std::string> processResourceMap(const std::map<std::string, std::string> &resourceMap,
                                                                 VROResourceType type);
    
};

#endif /* VROModelIOUtil_h */