/*
 * Copyright 2022 Rémi Bernon for CodeWeavers
 *
 * 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 <stddef.h>

#define COBJMACROS
#include "windef.h"
#include "winbase.h"

#include "initguid.h"
#include "inspectable.h"
#include "roapi.h"
#include "winstring.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(combase);

struct factory
{
    IActivationFactory IActivationFactory_iface;
    LONG ref;
    BOOL trusted;
};

static inline struct factory *impl_from_IActivationFactory(IActivationFactory *iface)
{
    return CONTAINING_RECORD(iface, struct factory, IActivationFactory_iface);
}

static HRESULT WINAPI factory_QueryInterface(IActivationFactory *iface, REFIID iid, void **out)
{
    struct factory *impl = impl_from_IActivationFactory(iface);

    TRACE("iface %p, iid %s, out %p.\n", iface, debugstr_guid(iid), out);

    if (IsEqualGUID(iid, &IID_IUnknown)
            || IsEqualGUID(iid, &IID_IInspectable)
            || IsEqualGUID(iid, &IID_IAgileObject)
            || IsEqualGUID(iid, &IID_IActivationFactory))
    {
        IInspectable_AddRef((*out = &impl->IActivationFactory_iface));
        return S_OK;
    }

    FIXME("%s not implemented, returning E_NOINTERFACE.\n", debugstr_guid(iid));
    *out = NULL;
    return E_NOINTERFACE;
}

static ULONG WINAPI factory_AddRef(IActivationFactory *iface)
{
    struct factory *impl = impl_from_IActivationFactory(iface);
    ULONG ref = InterlockedIncrement(&impl->ref);
    TRACE("iface %p increasing refcount to %lu.\n", iface, ref);
    return ref;
}

static ULONG WINAPI factory_Release(IActivationFactory *iface)
{
    struct factory *impl = impl_from_IActivationFactory(iface);
    ULONG ref = InterlockedDecrement(&impl->ref);
    TRACE("iface %p decreasing refcount to %lu.\n", iface, ref);
    return ref;
}

static HRESULT WINAPI factory_GetIids(IActivationFactory *iface, ULONG *iid_count, IID **iids)
{
    FIXME("iface %p, iid_count %p, iids %p stub!\n", iface, iid_count, iids);
    return E_NOTIMPL;
}

static HRESULT WINAPI factory_GetRuntimeClassName(IActivationFactory *iface, HSTRING *class_name)
{
    FIXME("iface %p, class_name %p stub!\n", iface, class_name);
    return E_NOTIMPL;
}

static HRESULT WINAPI factory_GetTrustLevel(IActivationFactory *iface, TrustLevel *trust_level)
{
    struct factory *impl = impl_from_IActivationFactory(iface);

    FIXME("iface %p, trust_level %p stub!\n", iface, trust_level);

    if (!impl->trusted) return E_NOTIMPL;

    *trust_level = BaseTrust;
    return S_OK;
}

static HRESULT WINAPI factory_ActivateInstance(IActivationFactory *iface, IInspectable **instance)
{
    FIXME("iface %p, instance %p stub!\n", iface, instance);
    return E_NOTIMPL;
}

static const struct IActivationFactoryVtbl factory_vtbl =
{
    factory_QueryInterface,
    factory_AddRef,
    factory_Release,
    /* IInspectable methods */
    factory_GetIids,
    factory_GetRuntimeClassName,
    factory_GetTrustLevel,
    /* IActivationFactory methods */
    factory_ActivateInstance,
};

static struct factory class_factory = {{&factory_vtbl}, 0};
static struct factory trusted_factory = {{&factory_vtbl}, 0, TRUE};

HRESULT WINAPI DllCanUnloadNow(void)
{
    FIXME("stub!\n");
    return S_OK;
}

HRESULT WINAPI DllGetActivationFactory(HSTRING classid, IActivationFactory **factory)
{
    const WCHAR *buffer = WindowsGetStringRawBuffer(classid, NULL);

    FIXME("class %s, factory %p stub!\n", debugstr_w(buffer), factory);

    if (!wcscmp(buffer, L"Wine.Test.Class"))
    {
        IActivationFactory_AddRef((*factory = &class_factory.IActivationFactory_iface));
        return S_OK;
    }
    if (!wcscmp(buffer, L"Wine.Test.Trusted"))
    {
        IActivationFactory_AddRef((*factory = &trusted_factory.IActivationFactory_iface));
        return S_OK;
    }

    return REGDB_E_CLASSNOTREG;
}

HRESULT WINAPI DllGetClassObject(REFCLSID clsid, REFIID riid, void **out)
{
    FIXME("clsid %s, riid %s, out %p stub!\n", debugstr_guid(clsid), debugstr_guid(riid), out);
    return CLASS_E_CLASSNOTAVAILABLE;
}