/*
 *  Gameux library self-registerable dll functions
 *
 * Copyright (C) 2010 Mariusz Pluciński
 *
 * 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 "config.h"

#include <stdarg.h>
#include <string.h>

#define COBJMACROS

#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "winreg.h"
#include "winerror.h"
#include "ole2.h"

#include "gameux.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(gameux);

/*
 * Near the bottom of this file are the exported DllRegisterServer and
 * DllUnregisterServer, which make all this worthwhile.
 */

/***********************************************************************
 *      interface for self-registering
 */
struct regsvr_interface
{
    IID const *iid;             /* NULL for end of list */
    LPCSTR name;                /* can be NULL to omit */
    IID const *base_iid;        /* can be NULL to omit */
    int num_methods;            /* can be <0 to omit */
    CLSID const *ps_clsid;      /* can be NULL to omit */
    CLSID const *ps_clsid32;    /* can be NULL to omit */
};

static HRESULT register_interfaces(struct regsvr_interface const *list);
static HRESULT unregister_interfaces(struct regsvr_interface const *list);

struct regsvr_coclass
{
    CLSID const *clsid;         /* NULL for end of list */
    LPCSTR name;                /* can be NULL to omit */
    LPCSTR ips;                 /* can be NULL to omit */
    LPCSTR ips32;               /* can be NULL to omit */
    LPCSTR ips32_tmodel;        /* can be NULL to omit */
    LPCSTR progid;              /* can be NULL to omit */
    LPCSTR version;             /* can be NULL to omit */
};

static HRESULT register_coclasses(struct regsvr_coclass const *list);
static HRESULT unregister_coclasses(struct regsvr_coclass const *list);

struct progid
{
    LPCSTR name;                /* NULL for end of list */
    LPCSTR description;         /* can be NULL to omit */
    CLSID const *clsid;
    LPCSTR curver;              /* can be NULL to omit */
};

static HRESULT register_progids(struct progid const *list);
static HRESULT unregister_progids(struct progid const *list);

/***********************************************************************
 *      static string constants
 */
static WCHAR const interface_keyname[10] = {
    'I', 'n', 't', 'e', 'r', 'f', 'a', 'c', 'e', 0 };
static WCHAR const base_ifa_keyname[14] = {
    'B', 'a', 's', 'e', 'I', 'n', 't', 'e', 'r', 'f', 'a', 'c',
    'e', 0 };
static WCHAR const num_methods_keyname[11] = {
    'N', 'u', 'm', 'M', 'e', 't', 'h', 'o', 'd', 's', 0 };
static WCHAR const ps_clsid_keyname[15] = {
    'P', 'r', 'o', 'x', 'y', 'S', 't', 'u', 'b', 'C', 'l', 's',
    'i', 'd', 0 };
static WCHAR const ps_clsid32_keyname[17] = {
    'P', 'r', 'o', 'x', 'y', 'S', 't', 'u', 'b', 'C', 'l', 's',
    'i', 'd', '3', '2', 0 };
static WCHAR const clsid_keyname[6] = {
    'C', 'L', 'S', 'I', 'D', 0 };
static WCHAR const ips_keyname[13] = {
    'I', 'n', 'P', 'r', 'o', 'c', 'S', 'e', 'r', 'v', 'e', 'r',
    0 };
static WCHAR const ips32_keyname[15] = {
    'I', 'n', 'P', 'r', 'o', 'c', 'S', 'e', 'r', 'v', 'e', 'r',
    '3', '2', 0 };
static WCHAR const progid_keyname[7] = {
    'P', 'r', 'o', 'g', 'I', 'D', 0 };
static WCHAR const versionindependentprogid_keyname[] = {
    'V', 'e', 'r', 's', 'i', 'o', 'n',
    'I', 'n', 'd', 'e', 'p', 'e', 'n', 'd', 'e', 'n', 't',
    'P', 'r', 'o', 'g', 'I', 'D', 0 };
static WCHAR const version_keyname[] = {
    'V', 'e', 'r', 's', 'i', 'o', 'n', 0 };
static WCHAR const curver_keyname[] = {
    'C', 'u', 'r', 'V', 'e', 'r', 0 };
static char const tmodel_valuename[] = "ThreadingModel";

/***********************************************************************
 *      static helper functions
 */
static LONG register_key_guid(HKEY base, WCHAR const *name, GUID const *guid);
static LONG register_key_defvalueW(HKEY base, WCHAR const *name,
        WCHAR const *value);
static LONG register_key_defvalueA(HKEY base, WCHAR const *name,
        char const *value);

/***********************************************************************
 *      register_interfaces
 */
static HRESULT register_interfaces(struct regsvr_interface const *list)
{
    LONG res = ERROR_SUCCESS;
    HKEY interface_key;

    res = RegCreateKeyExW(HKEY_CLASSES_ROOT, interface_keyname, 0, NULL, 0,
            KEY_READ | KEY_WRITE, NULL, &interface_key, NULL);
    if (res != ERROR_SUCCESS) goto error_return;

    for (; res == ERROR_SUCCESS && list->iid; ++list)
    {
        WCHAR buf[39];
        HKEY iid_key;

        StringFromGUID2(list->iid, buf, 39);
        res = RegCreateKeyExW(interface_key, buf, 0, NULL, 0,
            KEY_READ | KEY_WRITE, NULL, &iid_key, NULL);
        if (res != ERROR_SUCCESS) goto error_close_interface_key;

        if (list->name) {
            res = RegSetValueExA(iid_key, NULL, 0, REG_SZ,
                    (CONST BYTE*)(list->name),
                    strlen(list->name) + 1);
            if (res != ERROR_SUCCESS) goto error_close_iid_key;
        }

        if (list->base_iid) {
            res = register_key_guid(iid_key, base_ifa_keyname, list->base_iid);
            if (res != ERROR_SUCCESS) goto error_close_iid_key;
        }

        if (0 <= list->num_methods) {
            static WCHAR const fmt[3] = { '%', 'd', 0 };
            HKEY key;

            res = RegCreateKeyExW(iid_key, num_methods_keyname, 0, NULL, 0,
                    KEY_READ | KEY_WRITE, NULL, &key, NULL);
            if (res != ERROR_SUCCESS) goto error_close_iid_key;

            wsprintfW(buf, fmt, list->num_methods);
            res = RegSetValueExW(key, NULL, 0, REG_SZ,
                    (CONST BYTE*)buf,
                    (lstrlenW(buf) + 1) * sizeof(WCHAR));
            RegCloseKey(key);

            if (res != ERROR_SUCCESS) goto error_close_iid_key;
        }

        if (list->ps_clsid) {
            res = register_key_guid(iid_key, ps_clsid_keyname, list->ps_clsid);
            if (res != ERROR_SUCCESS) goto error_close_iid_key;
        }

        if (list->ps_clsid32) {
            res = register_key_guid(iid_key, ps_clsid32_keyname, list->ps_clsid32);
            if (res != ERROR_SUCCESS) goto error_close_iid_key;
        }

error_close_iid_key:
        RegCloseKey(iid_key);
    }

error_close_interface_key:
    RegCloseKey(interface_key);
error_return:
    return res != ERROR_SUCCESS ? HRESULT_FROM_WIN32(res) : S_OK;
}

/***********************************************************************
 *      unregister_interfaces
 */
static HRESULT unregister_interfaces(struct regsvr_interface const *list)
{
    LONG res = ERROR_SUCCESS;
    HKEY interface_key;

    res = RegOpenKeyExW(HKEY_CLASSES_ROOT, interface_keyname, 0,
            KEY_READ | KEY_WRITE, &interface_key);
    if (res == ERROR_FILE_NOT_FOUND) return S_OK;
    if (res != ERROR_SUCCESS) goto error_return;

    for (; res == ERROR_SUCCESS && list->iid; ++list) {
        WCHAR buf[39];

        StringFromGUID2(list->iid, buf, 39);
        res = RegDeleteTreeW(interface_key, buf);
        if (res == ERROR_FILE_NOT_FOUND) res = ERROR_SUCCESS;
    }

    RegCloseKey(interface_key);
error_return:
    return res != ERROR_SUCCESS ? HRESULT_FROM_WIN32(res) : S_OK;
}

/***********************************************************************
 *      register_coclasses
 */
static HRESULT register_coclasses(struct regsvr_coclass const *list)
{
    LONG res = ERROR_SUCCESS;
    HKEY coclass_key;

    res = RegCreateKeyExW(HKEY_CLASSES_ROOT, clsid_keyname, 0, NULL, 0,
            KEY_READ | KEY_WRITE, NULL, &coclass_key, NULL);
    if (res != ERROR_SUCCESS) goto error_return;

    for (; res == ERROR_SUCCESS && list->clsid; ++list) {
        WCHAR buf[39];
        HKEY clsid_key;

        StringFromGUID2(list->clsid, buf, 39);
        res = RegCreateKeyExW(coclass_key, buf, 0, NULL, 0,
                KEY_READ | KEY_WRITE, NULL, &clsid_key, NULL);
        if (res != ERROR_SUCCESS) goto error_close_coclass_key;

        if (list->name) {
            res = RegSetValueExA(clsid_key, NULL, 0, REG_SZ,
                    (CONST BYTE*)(list->name),
                    strlen(list->name) + 1);
            if (res != ERROR_SUCCESS) goto error_close_clsid_key;
        }

        if (list->ips) {
            res = register_key_defvalueA(clsid_key, ips_keyname, list->ips);
            if (res != ERROR_SUCCESS) goto error_close_clsid_key;
        }

        if (list->ips32) {
            HKEY ips32_key;

            res = RegCreateKeyExW(clsid_key, ips32_keyname, 0, NULL, 0,
                    KEY_READ | KEY_WRITE, NULL,
                    &ips32_key, NULL);
            if (res != ERROR_SUCCESS) goto error_close_clsid_key;

            res = RegSetValueExA(ips32_key, NULL, 0, REG_SZ,
                    (CONST BYTE*)list->ips32,
                    lstrlenA(list->ips32) + 1);
            if (res == ERROR_SUCCESS && list->ips32_tmodel)
            res = RegSetValueExA(ips32_key, tmodel_valuename, 0, REG_SZ,
                    (CONST BYTE*)list->ips32_tmodel,
                    strlen(list->ips32_tmodel) + 1);
            RegCloseKey(ips32_key);
            if (res != ERROR_SUCCESS) goto error_close_clsid_key;
        }

        if (list->progid) {
            char *buffer = NULL;
            LPCSTR progid;

            if (list->version) {
                buffer = HeapAlloc(GetProcessHeap(), 0, strlen(list->progid) + strlen(list->version) + 2);
                if (!buffer) {
                    res = ERROR_OUTOFMEMORY;
                    goto error_close_clsid_key;
                }
                strcpy(buffer, list->progid);
                strcat(buffer, ".");
                strcat(buffer, list->version);
                progid = buffer;
            } else
                progid = list->progid;

            res = register_key_defvalueA(clsid_key, progid_keyname, progid);
            HeapFree(GetProcessHeap(), 0, buffer);
            if (res != ERROR_SUCCESS) goto error_close_clsid_key;

            if (list->version) {
                res = register_key_defvalueA(clsid_key, versionindependentprogid_keyname, list->progid);
                if (res != ERROR_SUCCESS) goto error_close_clsid_key;
            }
        }

        if (list->version) {
            res = register_key_defvalueA(clsid_key, version_keyname, list->version);
            if (res != ERROR_SUCCESS) goto error_close_clsid_key;
        }

error_close_clsid_key:
        RegCloseKey(clsid_key);
    }

error_close_coclass_key:
    RegCloseKey(coclass_key);
error_return:
    return res != ERROR_SUCCESS ? HRESULT_FROM_WIN32(res) : S_OK;
}

/***********************************************************************
 *      unregister_coclasses
 */
static HRESULT unregister_coclasses(struct regsvr_coclass const *list)
{
    LONG res = ERROR_SUCCESS;
    HKEY coclass_key;

    res = RegOpenKeyExW(HKEY_CLASSES_ROOT, clsid_keyname, 0,
            KEY_READ | KEY_WRITE, &coclass_key);
    if (res == ERROR_FILE_NOT_FOUND) return S_OK;
    if (res != ERROR_SUCCESS) goto error_return;

    for (; res == ERROR_SUCCESS && list->clsid; ++list) {
        WCHAR buf[39];

        StringFromGUID2(list->clsid, buf, 39);
        res = RegDeleteTreeW(coclass_key, buf);
        if (res == ERROR_FILE_NOT_FOUND) res = ERROR_SUCCESS;
        if (res != ERROR_SUCCESS) goto error_close_coclass_key;
    }

error_close_coclass_key:
    RegCloseKey(coclass_key);
error_return:
    return res != ERROR_SUCCESS ? HRESULT_FROM_WIN32(res) : S_OK;
}

/***********************************************************************
 *      register_progids
 */
static HRESULT register_progids(struct progid const *list)
{
    LONG res = ERROR_SUCCESS;

    for (; res == ERROR_SUCCESS && list->name; ++list) {
        WCHAR buf[39];
        HKEY progid_key;

        res = RegCreateKeyExA(HKEY_CLASSES_ROOT, list->name, 0,
                NULL, 0, KEY_READ | KEY_WRITE, NULL,
                &progid_key, NULL);
        if (res != ERROR_SUCCESS) goto error_close_clsid_key;

        res = RegSetValueExA(progid_key, NULL, 0, REG_SZ,
                (CONST BYTE*)list->description,
                strlen(list->description) + 1);
        if (res != ERROR_SUCCESS) goto error_close_clsid_key;

        StringFromGUID2(list->clsid, buf, 39);

        res = register_key_defvalueW(progid_key, clsid_keyname, buf);
        if (res != ERROR_SUCCESS) goto error_close_clsid_key;

        if (list->curver) {
            res = register_key_defvalueA(progid_key, curver_keyname, list->curver);
            if (res != ERROR_SUCCESS) goto error_close_clsid_key;
        }

        error_close_clsid_key:
        RegCloseKey(progid_key);
    }

    return res != ERROR_SUCCESS ? HRESULT_FROM_WIN32(res) : S_OK;
}

/***********************************************************************
 *      unregister_progids
 */
static HRESULT unregister_progids(struct progid const *list)
{
    LONG res = ERROR_SUCCESS;

    for (; res == ERROR_SUCCESS && list->name; ++list) {
        res = RegDeleteTreeA(HKEY_CLASSES_ROOT, list->name);
        if (res == ERROR_FILE_NOT_FOUND) res = ERROR_SUCCESS;
    }

    return res != ERROR_SUCCESS ? HRESULT_FROM_WIN32(res) : S_OK;
}

/***********************************************************************
 *      regsvr_key_guid
 */
static LONG register_key_guid(HKEY base, WCHAR const *name, GUID const *guid)
{
    WCHAR buf[39];

    StringFromGUID2(guid, buf, 39);
    return register_key_defvalueW(base, name, buf);
}

/***********************************************************************
 *      regsvr_key_defvalueW
 */
static LONG register_key_defvalueW(
    HKEY base,
    WCHAR const *name,
    WCHAR const *value)
{
    LONG res;
    HKEY key;

    res = RegCreateKeyExW(base, name, 0, NULL, 0,
            KEY_READ | KEY_WRITE, NULL, &key, NULL);
    if (res != ERROR_SUCCESS) return res;
    res = RegSetValueExW(key, NULL, 0, REG_SZ, (CONST BYTE*)value,
            (lstrlenW(value) + 1) * sizeof(WCHAR));
    RegCloseKey(key);
    return res;
}

/***********************************************************************
 *      regsvr_key_defvalueA
 */
static LONG register_key_defvalueA(
    HKEY base,
    WCHAR const *name,
    char const *value)
{
    LONG res;
    HKEY key;

    res = RegCreateKeyExW(base, name, 0, NULL, 0,
            KEY_READ | KEY_WRITE, NULL, &key, NULL);
    if (res != ERROR_SUCCESS) return res;
    res = RegSetValueExA(key, NULL, 0, REG_SZ, (CONST BYTE*)value,
            lstrlenA(value) + 1);
    RegCloseKey(key);
    return res;
}

/***********************************************************************
 *      coclass list
 */
static struct regsvr_coclass const coclass_list[] = {
    {   &CLSID_GameExplorer,
        "GameExplorer Class",
        NULL,
        "gameux.dll",
        "Both",
        "gameux.GameExplorer.1",
        "1.0",
    },
    { NULL }            /* list terminator */
};

/***********************************************************************
 *      interface list
 */
static struct regsvr_interface const interface_list[] = {
    { NULL }            /* list terminator */
};

/***********************************************************************
 *      progid list
 */
static struct progid const progid_list[] = {
    {   "gameux.GameExplorer",
        "GameExplorer Class",
        &CLSID_GameExplorer,
        NULL
    },
    { NULL }            /* list terminator */
};

/***********************************************************************
 *      DllRegisterServer (GAMEUX.@)
 */
HRESULT WINAPI DllRegisterServer(void)
{
    HRESULT hr;

    TRACE("\n");

    hr = register_coclasses(coclass_list);
    if (SUCCEEDED(hr))
        hr = register_interfaces(interface_list);
    if (SUCCEEDED(hr))
        hr = register_progids(progid_list);

    return hr;
}

/***********************************************************************
 *      DllUnregisterServer (GAMEUX.@)
 */
HRESULT WINAPI DllUnregisterServer(void)
{
    HRESULT hr;

    TRACE("\n");

    hr = unregister_coclasses(coclass_list);
    if (SUCCEEDED(hr))
        hr = unregister_interfaces(interface_list);
    if (SUCCEEDED(hr))
        hr = unregister_progids(progid_list);

    return hr;
}