#pragma once

#include <progrock/winapi/String.h>                         // String
#include <progrock/winapi/failure/throwWinX.h>              // throwWinX, ErrorCode

#include <progrock/headerwrappers/winsdk/commctrl_h.h>      // TaskDialogIndirect
#include <progrock/headerwrappers/winsdk/windows_h.h>       // MessageBox

#include <progrock/headerwrappers/winsdk/windows_h.h>

#include <progrock/cppx/macro/is_unused.h>          // CPPX_IS_INTENTIONALLY_UNUSED


#undef WINAPI_TASKDIALOG_AVAILABLE
#if _WIN32_WINNT < _WIN32_WINNT_VISTA || !defined( TD_INFORMATION_ICON )
#   define WINAPI_VISTA_TASKDIALOG_AVAILABLE  0
#else
#   define WINAPI_VISTA_TASKDIALOG_AVAILABLE  1
#endif

namespace progrock{ namespace winapi{

    inline void infoMessageBox(
        HWND const          parentWindow,
        String const&       boxTitle,
        String const&       heading,
        String const&       msg
        )
    {
        static auto const spaced = []( String const& s ) -> String
        {
            String result;
            for( auto const c : s )
            {
                if( size( result ) > 0 ) { result += L" "; }
                result += c;
            }
            return result;
        };

        DWORD const options = 0
            | MB_ICONINFORMATION
            | (parentWindow == 0? MB_SETFOREGROUND | MB_TASKMODAL : 0);
        String const s = (heading.size() == 0? msg : spaced( heading ) + L"\n\n" + msg);

        int const choice = MessageBox( parentWindow, s.cString(), boxTitle.cString(), options );
        hopefully( choice != 0 )
            || throwWinX(
                ErrorCode( ::GetLastError() ),
                L"winapi::infoMessageBox: MessageBox failed"
                );
    }

#if WINAPI_VISTA_TASKDIALOG_AVAILABLE
    inline void infoTaskDialog(
        HWND const          parentWindow,
        String const&       boxTitle,
        String const&       heading,
        String const&       msg
        )
    {
        TASKDIALOGCONFIG params     = {sizeof( params )};
        params.hwndParent = parentWindow;
        params.hInstance = GetModuleHandle( 0 );
        params.dwFlags = TDF_SIZE_TO_CONTENT;
        params.dwCommonButtons = TDCBF_OK_BUTTON;
        params.pszWindowTitle = boxTitle.cString();
        params.pszMainIcon = TD_INFORMATION_ICON;
        params.pszMainInstruction = heading.cString();
        params.pszContent = msg.cString();
        params.nDefaultButton = IDOK;
        HRESULT const hr = TaskDialogIndirect( &params, nullptr, nullptr, nullptr );
        if( FAILED( hr ) )
        {
            throwWinX( ResultCode( hr ), L"vistaInfoBox: TaskDialogIndirect failed" );
        }
    }

    inline void infoBox(
        HWND const          parentWindow,
        String const&       boxTitle,
        String const&       heading,
        String const&       msg
        )
    {
        infoTaskDialog( parentWindow, boxTitle, heading, msg );
    }
#else
    inline void infoBox(
        HWND const          parentWindow,
        String const&       boxTitle,
        String const&       heading,
        String const&       msg
        )
    {
        infoMessageBox( parentWindow, boxTitle, heading, msg );
    }
#endif

    inline void infoBox(
        String const&       boxTitle,
        String const&       heading,
        String const&       msg
        )
    {
        infoBox( 0, boxTitle, heading, msg );
    }

} }  // namespace progrock::winapi