/* WinRT Windows.Globalization implementation
 *
 * Copyright 2021 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>

#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winstring.h"
#include "wine/debug.h"
#include "objbase.h"

#include "initguid.h"
#include "activation.h"

#define WIDL_using_Windows_Foundation
#define WIDL_using_Windows_Foundation_Collections
#include "windows.foundation.h"
#define WIDL_using_Windows_Globalization
#include "windows.globalization.h"
#define WIDL_using_Windows_System_UserProfile
#include "windows.system.userprofile.h"

WINE_DEFAULT_DEBUG_CHANNEL(locale);

static const char *debugstr_hstring(HSTRING hstr)
{
    const WCHAR *str;
    UINT32 len;
    if (hstr && !((ULONG_PTR)hstr >> 16)) return "(invalid)";
    str = WindowsGetStringRawBuffer(hstr, &len);
    return wine_dbgstr_wn(str, len);
}

struct hstring_vector
{
    IVectorView_HSTRING IVectorView_HSTRING_iface;
    LONG ref;

    ULONG count;
    HSTRING values[1];
};

static inline struct hstring_vector *impl_from_IVectorView_HSTRING(IVectorView_HSTRING *iface)
{
    return CONTAINING_RECORD(iface, struct hstring_vector, IVectorView_HSTRING_iface);
}

static HRESULT STDMETHODCALLTYPE hstring_vector_QueryInterface(IVectorView_HSTRING *iface,
        REFIID iid, void **out)
{
    struct hstring_vector *impl = impl_from_IVectorView_HSTRING(iface);
    TRACE("iface %p, iid %s, out %p stub!\n", iface, debugstr_guid(iid), out);

    if (IsEqualGUID(iid, &IID_IUnknown) ||
        IsEqualGUID(iid, &IID_IInspectable) ||
        IsEqualGUID(iid, &IID_IAgileObject) ||
        IsEqualGUID(iid, &IID_IVectorView_HSTRING))
    {
        IUnknown_AddRef(iface);
        *out = &impl->IVectorView_HSTRING_iface;
        return S_OK;
    }

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

static ULONG STDMETHODCALLTYPE hstring_vector_AddRef(IVectorView_HSTRING *iface)
{
    struct hstring_vector *impl = impl_from_IVectorView_HSTRING(iface);
    ULONG ref = InterlockedIncrement(&impl->ref);
    TRACE("iface %p, ref %u.\n", iface, ref);
    return ref;
}

static ULONG STDMETHODCALLTYPE hstring_vector_Release(IVectorView_HSTRING *iface)
{
    struct hstring_vector *impl = impl_from_IVectorView_HSTRING(iface);
    ULONG ref = InterlockedDecrement(&impl->ref);
    TRACE("iface %p, ref %u.\n", iface, ref);
    if (ref == 0)
    {
        while (impl->count--) WindowsDeleteString(impl->values[impl->count]);
        free(impl);
    }
    return ref;
}

static HRESULT STDMETHODCALLTYPE hstring_vector_GetIids(IVectorView_HSTRING *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 STDMETHODCALLTYPE hstring_vector_GetRuntimeClassName(IVectorView_HSTRING *iface,
        HSTRING *class_name)
{
    FIXME("iface %p, class_name %p stub!\n", iface, class_name);
    return E_NOTIMPL;
}

static HRESULT STDMETHODCALLTYPE hstring_vector_GetTrustLevel(IVectorView_HSTRING *iface,
        TrustLevel *trust_level)
{
    FIXME("iface %p, trust_level %p stub!\n", iface, trust_level);
    return E_NOTIMPL;
}

static HRESULT STDMETHODCALLTYPE hstring_vector_GetAt(IVectorView_HSTRING *iface,
        ULONG index, HSTRING *value)
{
    struct hstring_vector *impl = impl_from_IVectorView_HSTRING(iface);

    TRACE("iface %p, index %#x, value %p.\n", iface, index, value);

    *value = NULL;
    if (index >= impl->count) return E_BOUNDS;
    return WindowsDuplicateString(impl->values[index], value);
}

static HRESULT STDMETHODCALLTYPE hstring_vector_get_Size(IVectorView_HSTRING *iface,
        ULONG *value)
{
    struct hstring_vector *impl = impl_from_IVectorView_HSTRING(iface);

    TRACE("iface %p, value %p.\n", iface, value);

    *value = impl->count;
    return S_OK;
}

static HRESULT STDMETHODCALLTYPE hstring_vector_IndexOf(IVectorView_HSTRING *iface,
        HSTRING element, ULONG *index, BOOLEAN *found)
{
    struct hstring_vector *impl = impl_from_IVectorView_HSTRING(iface);
    INT32 i, order;

    TRACE("iface %p, element %p, index %p, found %p.\n", iface, element, index, found);

    for (i = 0; i < impl->count; ++i)
        if (SUCCEEDED(WindowsCompareStringOrdinal(impl->values[i], element, &order)) && order == 0)
            break;

    if (i < impl->count)
    {
        *found = TRUE;
        *index = i;
    }
    else
    {
        *found = FALSE;
        *index = 0;
    }

    return S_OK;
}

static HRESULT STDMETHODCALLTYPE hstring_vector_GetMany(IVectorView_HSTRING *iface,
        ULONG start_index, ULONG items_size, HSTRING *items, UINT *count)
{
    struct hstring_vector *impl = impl_from_IVectorView_HSTRING(iface);
    HRESULT hr = S_OK;
    ULONG i;

    TRACE("iface %p, start_index %#x, items %p, count %p.\n", iface, start_index, items, count);

    memset(items, 0, items_size * sizeof(*items));

    for (i = start_index; i < impl->count && i < start_index + items_size; ++i)
        if (FAILED(hr = WindowsDuplicateString(impl->values[i], items + i - start_index)))
            break;

    if (FAILED(hr)) while (i-- > start_index) WindowsDeleteString(items[i - start_index]);
    *count = i - start_index;
    return hr;
}

static const struct IVectorView_HSTRINGVtbl hstring_vector_vtbl =
{
    hstring_vector_QueryInterface,
    hstring_vector_AddRef,
    hstring_vector_Release,
    /* IInspectable methods */
    hstring_vector_GetIids,
    hstring_vector_GetRuntimeClassName,
    hstring_vector_GetTrustLevel,
    /* IVectorView<HSTRING> methods */
    hstring_vector_GetAt,
    hstring_vector_get_Size,
    hstring_vector_IndexOf,
    hstring_vector_GetMany,
};

static HRESULT hstring_vector_create(HSTRING *values, SIZE_T count, IVectorView_HSTRING **out)
{
    struct hstring_vector *impl;

    if (!(impl = malloc(offsetof(struct hstring_vector, values[count])))) return E_OUTOFMEMORY;
    impl->ref = 1;

    impl->IVectorView_HSTRING_iface.lpVtbl = &hstring_vector_vtbl;
    impl->count = count;
    memcpy(impl->values, values, count * sizeof(HSTRING));

    *out = &impl->IVectorView_HSTRING_iface;
    return S_OK;
}

struct windows_globalization
{
    IActivationFactory IActivationFactory_iface;
    IGlobalizationPreferencesStatics IGlobalizationPreferencesStatics_iface;
    LONG ref;
};

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

static inline struct windows_globalization *impl_from_IGlobalizationPreferencesStatics(IGlobalizationPreferencesStatics *iface)
{
    return CONTAINING_RECORD(iface, struct windows_globalization, IGlobalizationPreferencesStatics_iface);
}

static HRESULT STDMETHODCALLTYPE windows_globalization_QueryInterface(
        IActivationFactory *iface, REFIID iid, void **out)
{
    struct windows_globalization *impl = impl_from_IActivationFactory(iface);
    TRACE("iface %p, iid %s, out %p stub!\n", iface, debugstr_guid(iid), out);

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

    if (IsEqualGUID(iid, &IID_IGlobalizationPreferencesStatics))
    {
        IUnknown_AddRef(iface);
        *out = &impl->IGlobalizationPreferencesStatics_iface;
        return S_OK;
    }

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

static ULONG STDMETHODCALLTYPE windows_globalization_AddRef(
        IActivationFactory *iface)
{
    struct windows_globalization *impl = impl_from_IActivationFactory(iface);
    ULONG ref = InterlockedIncrement(&impl->ref);
    TRACE("iface %p, ref %u.\n", iface, ref);
    return ref;
}

static ULONG STDMETHODCALLTYPE windows_globalization_Release(
        IActivationFactory *iface)
{
    struct windows_globalization *impl = impl_from_IActivationFactory(iface);
    ULONG ref = InterlockedDecrement(&impl->ref);
    TRACE("iface %p, ref %u.\n", iface, ref);
    return ref;
}

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

static HRESULT STDMETHODCALLTYPE windows_globalization_GetTrustLevel(
        IActivationFactory *iface, TrustLevel *trust_level)
{
    FIXME("iface %p, trust_level %p stub!\n", iface, trust_level);
    return E_NOTIMPL;
}

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

static const struct IActivationFactoryVtbl activation_factory_vtbl =
{
    windows_globalization_QueryInterface,
    windows_globalization_AddRef,
    windows_globalization_Release,
    /* IInspectable methods */
    windows_globalization_GetIids,
    windows_globalization_GetRuntimeClassName,
    windows_globalization_GetTrustLevel,
    /* IActivationFactory methods */
    windows_globalization_ActivateInstance,
};

static HRESULT STDMETHODCALLTYPE globalization_preferences_QueryInterface(
        IGlobalizationPreferencesStatics *iface, REFIID iid, void **object)
{
    struct windows_globalization *impl = impl_from_IGlobalizationPreferencesStatics(iface);
    return windows_globalization_QueryInterface(&impl->IActivationFactory_iface, iid, object);
}

static ULONG STDMETHODCALLTYPE globalization_preferences_AddRef(
        IGlobalizationPreferencesStatics *iface)
{
    struct windows_globalization *impl = impl_from_IGlobalizationPreferencesStatics(iface);
    return windows_globalization_AddRef(&impl->IActivationFactory_iface);
}

static ULONG STDMETHODCALLTYPE globalization_preferences_Release(
        IGlobalizationPreferencesStatics *iface)
{
    struct windows_globalization *impl = impl_from_IGlobalizationPreferencesStatics(iface);
    return windows_globalization_Release(&impl->IActivationFactory_iface);
}

static HRESULT STDMETHODCALLTYPE globalization_preferences_GetIids(
        IGlobalizationPreferencesStatics *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 STDMETHODCALLTYPE globalization_preferences_GetRuntimeClassName(
        IGlobalizationPreferencesStatics *iface, HSTRING *class_name)
{
    FIXME("iface %p, class_name %p stub!\n", iface, class_name);
    return E_NOTIMPL;
}

static HRESULT STDMETHODCALLTYPE globalization_preferences_GetTrustLevel(
        IGlobalizationPreferencesStatics *iface, TrustLevel *trust_level)
{
    FIXME("iface %p, trust_level %p stub!\n", iface, trust_level);
    return E_NOTIMPL;
}

static HRESULT STDMETHODCALLTYPE globalization_preferences_get_Calendars(
        IGlobalizationPreferencesStatics *iface, IVectorView_HSTRING **out)
{
    FIXME("iface %p, out %p stub!\n", iface, out);
    return hstring_vector_create(NULL, 0, out);
}

static HRESULT STDMETHODCALLTYPE globalization_preferences_get_Clocks(
        IGlobalizationPreferencesStatics *iface, IVectorView_HSTRING **out)
{
    FIXME("iface %p, out %p stub!\n", iface, out);
    return hstring_vector_create(NULL, 0, out);
}

static HRESULT STDMETHODCALLTYPE globalization_preferences_get_Currencies(
        IGlobalizationPreferencesStatics *iface, IVectorView_HSTRING **out)
{
    FIXME("iface %p, out %p stub!\n", iface, out);
    return hstring_vector_create(NULL, 0, out);
}

static HRESULT STDMETHODCALLTYPE globalization_preferences_get_Languages(
        IGlobalizationPreferencesStatics *iface, IVectorView_HSTRING **out)
{
    HSTRING hstring;
    HRESULT hr;
    WCHAR locale[LOCALE_NAME_MAX_LENGTH];

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

    if (!GetUserDefaultLocaleName(locale, LOCALE_NAME_MAX_LENGTH))
        return E_FAIL;

    TRACE("returning language %s\n", debugstr_w(locale));

    if (FAILED(hr = WindowsCreateString(locale, wcslen(locale), &hstring)))
        return hr;

    return hstring_vector_create(&hstring, 1, out);
}

static HRESULT STDMETHODCALLTYPE globalization_preferences_get_HomeGeographicRegion(
        IGlobalizationPreferencesStatics *iface, HSTRING* out)
{
    WCHAR country[16];

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

    if (!GetUserDefaultGeoName(country, 16))
        return E_FAIL;

    TRACE("returning country %s\n", debugstr_w(country));

    return WindowsCreateString(country, wcslen(country), out);
}

static HRESULT STDMETHODCALLTYPE globalization_preferences_get_WeekStartsOn(
        IGlobalizationPreferencesStatics *iface, enum DayOfWeek* out)
{
    FIXME("iface %p, out %p stub!\n", iface, out);
    return E_NOTIMPL;
}

static const struct IGlobalizationPreferencesStaticsVtbl globalization_preferences_vtbl =
{
    globalization_preferences_QueryInterface,
    globalization_preferences_AddRef,
    globalization_preferences_Release,
    /* IInspectable methods */
    globalization_preferences_GetIids,
    globalization_preferences_GetRuntimeClassName,
    globalization_preferences_GetTrustLevel,
    /* IGlobalizationPreferencesStatics methods */
    globalization_preferences_get_Calendars,
    globalization_preferences_get_Clocks,
    globalization_preferences_get_Currencies,
    globalization_preferences_get_Languages,
    globalization_preferences_get_HomeGeographicRegion,
    globalization_preferences_get_WeekStartsOn,
};

static struct windows_globalization windows_globalization =
{
    {&activation_factory_vtbl},
    {&globalization_preferences_vtbl},
    0
};

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;
}

HRESULT WINAPI DllGetActivationFactory(HSTRING classid, IActivationFactory **factory)
{
    TRACE("classid %s, factory %p.\n", debugstr_hstring(classid), factory);
    *factory = &windows_globalization.IActivationFactory_iface;
    IUnknown_AddRef(*factory);
    return S_OK;
}