// Copyright (C) Microsoft Corporation. All rights reserved.

#if defined(_MSC_VER)
#pragma once
#endif

#ifndef _ROPARAMETERIXEDIID_H
#define _ROPARAMETERIXEDIID_H

#ifdef _CONTRACT_GEN
#include <nt.h>
#include <ntrtl.h>
#include <nturtl.h>
#endif
#include <apiset.h>
#include <apisetcconv.h>
#include <rpc.h>
#include <basetyps.h>

DECLARE_HANDLE(ROPARAMIIDHANDLE);
//struct ROPARAMIIDHANDLE__; typedef struct ROPARAMIIDHANDLE__ *ROPARAMIIDHANDLE;

 
struct IRoSimpleMetaDataBuilder
{
    STDMETHOD(SetWinRtInterface)(
        GUID iid) = 0;
    STDMETHOD(SetDelegate)(
        GUID iid) = 0;
    STDMETHOD(SetInterfaceGroupSimpleDefault)(
        PCWSTR                  name,
        PCWSTR                  defaultInterfaceName,
        _In_opt_ const GUID*    defaultInterfaceIID) = 0;
    STDMETHOD(SetInterfaceGroupParameterizedDefault)(
        PCWSTR                              name,
        UINT32                              elementCount,
        _In_reads_(elementCount) PCWSTR*   defaultInterfaceNameElements) = 0;
    STDMETHOD(SetRuntimeClassSimpleDefault)(
        PCWSTR                  name,
        PCWSTR                  defaultInterfaceName,
        _In_opt_ const GUID*    defaultInterfaceIID) = 0;
    STDMETHOD(SetRuntimeClassParameterizedDefault)(
        PCWSTR                              name,
        UINT32                              elementCount,
        _In_reads_(elementCount) const PCWSTR*   defaultInterfaceNameElements) = 0;
    STDMETHOD(SetStruct)(
        PCWSTR                          name,
        UINT32                          numFields, 
        _In_reads_(numFields) const PCWSTR*  fieldTypeNames) = 0;
    STDMETHOD(SetEnum)(
        PCWSTR name,
        PCWSTR baseType) = 0;
    STDMETHOD(SetParameterizedInterface)(
        GUID   piid,
        UINT32 numArgs) = 0;
    STDMETHOD(SetParameterizedDelegate)(
        GUID   piid,
        UINT32 numArgs) = 0;
};

struct IRoMetaDataLocator
{
    STDMETHOD(Locate)(
        PCWSTR                      nameElement,
        _In_ IRoSimpleMetaDataBuilder&   metaDataDestination
    ) const = 0;
};

 
STDAPI
RoGetParameterizedTypeInstanceIID(
    UINT32 nameElementCount,
    _In_reads_(nameElementCount) PCWSTR* nameElements,
    _In_ const IRoMetaDataLocator& metaDataLocator,
    _Out_ GUID* iid,
    _Outptr_opt_ ROPARAMIIDHANDLE* pExtra
    );


STDAPI_(void)
RoFreeParameterizedTypeExtra(
    _In_ ROPARAMIIDHANDLE extra
    );


STDAPI_(PCSTR)
RoParameterizedTypeExtraGetTypeSignature(
    _In_ ROPARAMIIDHANDLE extra
    );


#ifdef __cplusplus

namespace Ro { namespace detail 
{
    // private type used in helper function 
    template <typename Fn>
    struct _Locator;
}} // namespace Ro::detail

namespace Ro 
{
    // helper function to create IRoMetaDataLocator from lambda expression
    template <typename Fn>
    Ro::detail::_Locator<Fn> Locator(const Fn& fn);
} // namespace Ro

namespace Ro { namespace detail 
{
    template <typename Fn>
    struct _Locator : IRoMetaDataLocator
    {
        Fn _fn;

        _Locator(const Fn& fn) 
        : _fn(fn)
        {
        }

        // 
        // Parameters:
        //   nameElement
        //     a metadata typeref name to resolve.  
        //     Eg: "N1.N2.IFoo", or "W.F.C.IVector`1".
        //   pushMetaData
        //     data sink for providing information about the 
        //     type information for nameElement
        // 
        IFACEMETHOD(Locate)(
            PCWSTR name,
            IRoSimpleMetaDataBuilder& pushMetaData) const
        {
            return _fn(name, pushMetaData);
        }
    };
}} // namespace Ro::detail

namespace Ro
{
    template <typename Fn>
    Ro::detail::_Locator<Fn> Locator(const Fn& fn)
    {
        return Ro::detail::_Locator<Fn>(fn);
    }
}

#endif //__cplusplus

#endif /* _ROPARAMETERIXEDIID_H */