#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>


#define delta360 960 //total delta around the wheel
#define len360 7.0 //cm
#define deltaToCm len360/delta360

const char g_szClassName[] = "myWindowClass";
HHOOK hook;
bool running = false;
float total = 0.0;
int totalcm, leftover, meter;

// Step 4: the Window Procedure
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch(msg)
    {
        case WM_QUIT:
        case WM_CLOSE: {
            running = false;
        }break;

        default:
            return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return 0;
}


// Step 4: the Window Procedure
LRESULT CALLBACK hookProc(int code, WPARAM wParam, LPARAM lParam) {
        switch(wParam) {
                case WM_MOUSEWHEEL: {

            int meter = 0;
            int decimeter = 0;
            short delta = GET_WHEEL_DELTA_WPARAM( lParam );
            int ticks = delta;
            if (ticks < 0 ) ticks = -ticks;
                total+=ticks;
            leftover = (int)(deltaToCm*total);

            if (leftover >= 100){
                meter = leftover/100;
                leftover -= (leftover/100)*100;

            }
            if (leftover >= 10){
                decimeter = leftover/10;
                leftover -= (leftover/10)*10;
            }

            printf("%d meter, %d decimeter, %d centimeter scrolled\n", meter, decimeter, leftover);
            break;
            }
        }
        return CallNextHookEx(hook, code, wParam, lParam);
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nCmdShow)
{
    WNDCLASSEX wc;
    HWND hwnd;
    MSG Msg;
    //Step 1: Registering the Window Class
    wc.cbSize        = sizeof(WNDCLASSEX);
    wc.style         = 0;
    wc.lpfnWndProc   = WndProc;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = 0;
    wc.hInstance     = hInstance;
    wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
    wc.lpszMenuName  = NULL;
    wc.lpszClassName = g_szClassName;
    wc.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);

        if(!RegisterClassEx(&wc))
    {
        MessageBox(NULL, "Window Registration Failed!", "Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }
    // Step 2: Creating the Window
    hwnd = CreateWindowEx(
        WS_EX_CLIENTEDGE,
        g_szClassName,
        "test",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, 800, 600,
        NULL, NULL, hInstance, NULL);

    if(hwnd == NULL)
    {
        MessageBox(NULL, "Window Creation Failed!", "Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    ShowWindow(hwnd, nCmdShow);
        // -----------------------------------------------
        // (3): Hooka din app att lyssna på mouse events globalt
        // -----------------------------------------------
    hook = SetWindowsHookEx(WH_MOUSE_LL, hookProc, GetModuleHandle(0), 0);
    running = true;
    while(running){
        while(PeekMessage(&Msg, hwnd, 0, 0, PM_REMOVE)){
            TranslateMessage(&Msg);
            DispatchMessage(&Msg);
        }
        Sleep(10);
    }
    UnhookWindowsHookEx(hook);

    return 0;

}