main.cpp

#include "src/app.hpp"
#include "src/utils.hpp"

#include <shellapi.h>
#include <windows.h>

HANDLE g_hMutex = nullptr;

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE /*hPrevInstance*/, LPSTR /*lpCmdLine*/, int /*nCmdShow*/) {
    int argc = 0;
    LPWSTR* argv = CommandLineToArgvW(GetCommandLineW(), &argc);

    // Mutex to prevent multiple instances
    g_hMutex = CreateMutexW(nullptr, TRUE, PROCESS_MUTEX_GUID);
    if (!g_hMutex) {
        LocalFree(argv);
        return 1;
    }
    if (GetLastError() == ERROR_ALREADY_EXISTS) {
        DWORD waitRes = WaitForSingleObject(g_hMutex, 1000);
        if (waitRes == WAIT_TIMEOUT || waitRes == WAIT_FAILED) {
            if (waitRes == WAIT_TIMEOUT) {
                HWND existingApp = FindWindowW(L"NameExchangerClass", L"FilenameExchanger");
                if (existingApp) {
                    ShowWindow(existingApp, SW_RESTORE);
                    SetForegroundWindow(existingApp);
                }
            }
            LocalFree(argv);
            CloseHandle(g_hMutex);
            return 0;
        }
    }

    App& app = GetApp();

    if (!app.Init(hInstance, argc, argv)) {
        LocalFree(argv);
        if (g_hMutex) {
            ReleaseMutex(g_hMutex);
            CloseHandle(g_hMutex);
        }
        return 0;
    }
    LocalFree(argv);

    int result = app.Run();
    app.Shutdown();

    if (g_hMutex) {
        ReleaseMutex(g_hMutex);
        CloseHandle(g_hMutex);
    }

    return result;
}