/* TODO, WinRT: include copyright info in SDL_winrtpaths.cpp
   TODO, WinRT: remove the need to compile this with C++/CX (/ZW) extensions, and if possible, without C++ at all
*/

#include "SDL_config.h"

#ifdef __WINRT__

extern "C" {
#include "SDL_filesystem.h"
#include "SDL_error.h"
#include "SDL_stdinc.h"
#include "SDL_system.h"
#include "../../core/windows/SDL_windows.h"
}

#include <string>
#include <unordered_map>

using namespace std;
using namespace Windows::Storage;

extern "C" const wchar_t *
SDL_WinRTGetFSPathUNICODE(SDL_WinRT_Path pathType)
{
    switch (pathType) {
        case SDL_WINRT_PATH_INSTALLED_LOCATION:
        {
            static wstring path;
            if (path.empty()) {
                path = Windows::ApplicationModel::Package::Current->InstalledLocation->Path->Data();
            }
            return path.c_str();
        }

        case SDL_WINRT_PATH_LOCAL_FOLDER:
        {
            static wstring path;
            if (path.empty()) {
                path = ApplicationData::Current->LocalFolder->Path->Data();
            }
            return path.c_str();
        }

#if WINAPI_FAMILY != WINAPI_FAMILY_PHONE_APP
        case SDL_WINRT_PATH_ROAMING_FOLDER:
        {
            static wstring path;
            if (path.empty()) {
                path = ApplicationData::Current->RoamingFolder->Path->Data();
            }
            return path.c_str();
        }

        case SDL_WINRT_PATH_TEMP_FOLDER:
        {
            static wstring path;
            if (path.empty()) {
                path = ApplicationData::Current->TemporaryFolder->Path->Data();
            }
            return path.c_str();
        }
#endif

        default:
            break;
    }

    SDL_Unsupported();
    return NULL;
}

extern "C" const char *
SDL_WinRTGetFSPathUTF8(SDL_WinRT_Path pathType)
{
    typedef unordered_map<SDL_WinRT_Path, string> UTF8PathMap;
    static UTF8PathMap utf8Paths;

    UTF8PathMap::iterator searchResult = utf8Paths.find(pathType);
    if (searchResult != utf8Paths.end()) {
        return searchResult->second.c_str();
    }

    const wchar_t * ucs2Path = SDL_WinRTGetFSPathUNICODE(pathType);
    if (!ucs2Path) {
        return NULL;
    }

    char * utf8Path = WIN_StringToUTF8(ucs2Path);
    utf8Paths[pathType] = utf8Path;
    SDL_free(utf8Path);
    return utf8Paths[pathType].c_str();
}

extern "C" char *
SDL_GetBasePath(void)
{
    const char * srcPath = SDL_WinRTGetFSPathUTF8(SDL_WINRT_PATH_INSTALLED_LOCATION);
    size_t destPathLen;
    char * destPath = NULL;

    if (!srcPath) {
        SDL_SetError("Couldn't locate our basepath: %s", SDL_GetError());
        return NULL;
    }

    destPathLen = SDL_strlen(srcPath) + 2;
    destPath = (char *) SDL_malloc(destPathLen);
    if (!destPath) {
        SDL_OutOfMemory();
        return NULL;
    }

    SDL_snprintf(destPath, destPathLen, "%s\\", srcPath);
    return destPath;
}

extern "C" char *
SDL_GetPrefPath(const char *org, const char *app)
{
    /* WinRT note: The 'SHGetFolderPath' API that is used in Windows 7 and
     * earlier is not available on WinRT or Windows Phone.  WinRT provides
     * a similar API, but SHGetFolderPath can't be called, at least not
     * without violating Microsoft's app-store requirements.
     */

#if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
    /* A 'Roaming' folder is not available in Windows Phone 8, however a 'Local' folder is. */
    const char * srcPath = SDL_WinRTGetFSPathUTF8(SDL_WINRT_PATH_LOCAL_FOLDER);
#else
    /* A 'Roaming' folder is available on Windows 8 and 8.1.  Use that. */
    const char * srcPath = SDL_WinRTGetFSPathUTF8(SDL_WINRT_PATH_ROAMING_FOLDER);
#endif

    size_t destPathLen;
    char * destPath = NULL;

    if (!srcPath) {
        SDL_SetError("Couldn't locate our basepath: %s", SDL_GetError());
        return NULL;
    }

    destPathLen = SDL_strlen(srcPath) + SDL_strlen(org) + SDL_strlen(app) + 4;
    destPath = (char *) SDL_malloc(destPathLen);
    if (!destPath) {
        SDL_OutOfMemory();
        return NULL;
    }

    SDL_snprintf(destPath, destPathLen, "%s\\%s\\%s\\", srcPath, org, app);
    return destPath;
}

#endif /* __WINRT__ */