#include "UserData.h"
#include <SDL3/SDL.h>
#include <filesystem>
#include <stdexcept>

std::string UserData::projectsDir;
std::string UserData::brushesDir;

void UserData::Init() {
    std::string writablePath;
#ifdef __ANDROID__
    // try public readable
    const char* prefPath = SDL_GetAndroidExternalStoragePath();
    if (prefPath) {
        writablePath = prefPath;
    } else {
        // try /data/data by android api
        const char* internalPath = SDL_GetAndroidInternalStoragePath();
        if (internalPath) {
            writablePath = internalPath;
        } else {
            // android fucked up, lets try anyway
            writablePath = "/data/data/io.tngl.hatlink.gradien/files";
        }
    }
    if (!writablePath.empty() && (writablePath.back() == '/' || writablePath.back() == '\\')) {
        writablePath.pop_back();
    }
#else
    const char* xdgDataHome = std::getenv("XDG_DATA_HOME");
    if (xdgDataHome != nullptr) {
        writablePath = xdgDataHome;
    } else {
        const char* homeEnv = std::getenv("HOME");
        if (homeEnv != nullptr) {
            writablePath = homeEnv;
            writablePath += "/.local/share";
        } else {
            throw std::runtime_error("Failed to find suitable location for user data");
        }
    }
    writablePath += "/Gradien";
#endif

    projectsDir = writablePath + "/Projects";
    brushesDir = writablePath + "/Brushes";

    std::filesystem::create_directories(projectsDir);
    std::filesystem::create_directories(brushesDir);
}

std::string UserData::GetProjectsDir() {
    return projectsDir;
}

std::string UserData::GetBrushesDir() {
    return brushesDir;
}