/*  
 * InfiniPaint
 * Copyright (C) 2025-2026 Yousef Khadadeh
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "SwitchCWD.hpp"
#include <iostream>
#include <filesystem>

#ifdef __APPLE__
#include <CoreFoundation/CFBundle.h>
#elif _WIN32
#include <Shlwapi.h>
#endif



void switch_cwd() {
#ifdef __APPLE__
    CFBundleRef mainBundle = CFBundleGetMainBundle();
    CFURLRef resourcesURL = CFBundleCopyBundleURL(mainBundle);
    CFStringRef str = CFURLCopyFileSystemPath(resourcesURL, kCFURLPOSIXPathStyle);
    CFRelease(resourcesURL);
    char path[4096];

    CFStringGetCString(str, path, 4096, kCFStringEncodingUTF8);
    CFRelease(str);
    std::string newCWD(path);
#ifdef MACOS_MAKE_BUNDLE
    newCWD += "/Contents/Resources";
#endif

    std::filesystem::current_path(std::filesystem::path(newCWD));
#elif _WIN32
    // https://stackoverflow.com/a/33613252 but UTF-8
    constexpr int MAX_PATH_STEP = 2048;
    std::string pathStr;
    DWORD copied = 0;
    do {
        pathStr.resize(pathStr.size() + MAX_PATH_STEP);
        copied = GetModuleFileName(NULL, pathStr.data(), pathStr.size());
    } while(copied >= pathStr.size());
    pathStr.resize(copied);
    
	std::filesystem::path exePath(pathStr);
	std::filesystem::current_path(exePath.parent_path());
#elif __linux__
    std::filesystem::path exePath = std::filesystem::canonical("/proc/self/exe");
    std::filesystem::current_path(exePath.parent_path());
#endif
}