/* Wine Vulkan ICD implementation
 *
 * Copyright 2017 Roderick Colenbrander
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <stdarg.h>

#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winuser.h"

#include "vulkan_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(vulkan);

static HINSTANCE hinstance;

BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, void *reserved)
{
    TRACE("%p, %u, %p\n", hinst, reason, reserved);

    switch (reason)
    {
        case DLL_PROCESS_ATTACH:
            hinstance = hinst;
            DisableThreadLibraryCalls(hinst);
            break;
    }
    return TRUE;
}

static const WCHAR winevulkan_json_resW[] = {'w','i','n','e','v','u','l','k','a','n','_','j','s','o','n',0};
static const WCHAR winevulkan_json_pathW[] = {'\\','w','i','n','e','v','u','l','k','a','n','.','j','s','o','n',0};
static const WCHAR vulkan_driversW[] = {'S','o','f','t','w','a','r','e','\\','K','h','r','o','n','o','s','\\',
                                        'V','u','l','k','a','n','\\','D','r','i','v','e','r','s',0};

HRESULT WINAPI DllRegisterServer(void)
{
    WCHAR json_path[MAX_PATH];
    HRSRC rsrc;
    const char *data;
    DWORD datalen, written, zero = 0;
    HANDLE file;
    HKEY key;

    /* Create the JSON manifest and registry key to register this ICD with the official Vulkan loader. */
    TRACE("\n");
    rsrc = FindResourceW(hinstance, winevulkan_json_resW, (const WCHAR *)RT_RCDATA);
    data = LockResource(LoadResource(hinstance, rsrc));
    datalen = SizeofResource(hinstance, rsrc);

    GetSystemDirectoryW(json_path, ARRAY_SIZE(json_path));
    lstrcatW(json_path, winevulkan_json_pathW);
    file = CreateFileW(json_path, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    if (file == INVALID_HANDLE_VALUE)
    {
        ERR("Unable to create JSON manifest.\n");
        return E_UNEXPECTED;
    }
    WriteFile(file, data, datalen, &written, NULL);
    CloseHandle(file);

    if (!RegCreateKeyExW(HKEY_LOCAL_MACHINE, vulkan_driversW, 0, NULL, 0, KEY_SET_VALUE, NULL, &key, NULL))
    {
        RegSetValueExW(key, json_path, 0, REG_DWORD, (const BYTE *)&zero, sizeof(zero));
        RegCloseKey(key);
    }
    return S_OK;
}

HRESULT WINAPI DllUnregisterServer(void)
{
    WCHAR json_path[MAX_PATH];
    HKEY key;

    /* Remove the JSON manifest and registry key */
    TRACE("\n");
    GetSystemDirectoryW(json_path, ARRAY_SIZE(json_path));
    lstrcatW(json_path, winevulkan_json_pathW);
    DeleteFileW(json_path);

    if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, vulkan_driversW, 0, KEY_SET_VALUE, &key) == ERROR_SUCCESS)
    {
        RegDeleteValueW(key, json_path);
        RegCloseKey(key);
    }

    return S_OK;
}