#include <windows.h>

#include "hook/table.h"
#include "hooklib/reg.h"
#include "util/dprintf.h"
#include "saohook/touch.h"

static int WINAPI my_GetSystemMetrics(int nIndex);
static int (WINAPI *next_GetSystemMetrics)(int nIndex);

static const struct hook_symbol touch_user32_syms[] = {
    {
        .name = "GetSystemMetrics",
        .patch = my_GetSystemMetrics,
        .link = (void **) &next_GetSystemMetrics,
    },
};

HRESULT sao_touch_hook_init(const struct sao_touch_config *cfg)
{
    if (!cfg->enable) {
        return S_OK;
    }

    hook_table_apply(
        NULL,
        "User32.dll",
        touch_user32_syms,
        _countof(touch_user32_syms));
    
    return S_OK;
}

static int WINAPI my_GetSystemMetrics(int nIndex)
{
    if (nIndex == SM_DIGITIZER) {
        return NID_MULTI_INPUT;
    }
    return next_GetSystemMetrics(nIndex);
}