// Copyright (C) 2003-2024 VLC authors and VideoLAN

// SPDX-License-Identifier: LGPL-2.1-or-later

//

// chapter_command_script.cpp : Matroska Script Codec for Matroska Chapter Codecs

// Authors: Laurent Aimar <fenrir@via.ecp.fr>

//          Steve Lhomme <steve.lhomme@free.fr>

#include "chapter_command_script.hpp"

#include "virtual_segment.hpp"

namespace mkv {

//Matroska Script

const std::string matroska_script_interpretor_c::CMD_MS_GOTO_AND_PLAY = "GotoAndPlay";

// see http://www.matroska.org/technical/specs/chapters/index.html#mscript

//  for a description of existing commands

bool matroska_script_interpretor_c::Interpret( const binary * p_command, size_t i_size )

{

    bool b_result = false;

    std::string sz_command( reinterpret_cast<const char*> (p_command), i_size );

    vlc_debug( l, "command : %s", sz_command.c_str() );

    if ( sz_command.compare( 0, CMD_MS_GOTO_AND_PLAY.size(), CMD_MS_GOTO_AND_PLAY ) == 0 )

    {

        size_t i,j;

        // find the (

        for ( i=CMD_MS_GOTO_AND_PLAY.size(); i<sz_command.size(); i++)

        {

            if ( sz_command[i] == '(' )

            {

                i++;

                break;

            }

        }

        // find the )

        for ( j=i; j<sz_command.size(); j++)

        {

            if ( sz_command[j] == ')' )

            {

                i--;

                break;

            }

        }

        std::string st = sz_command.substr( i+1, j-i-1 );

        chapter_uid i_chapter_uid = std::stoul( st );

        virtual_segment_c *p_vsegment;

        virtual_chapter_c *p_vchapter = vm.FindVChapter( i_chapter_uid, p_vsegment );

        if ( p_vchapter == NULL )

            vlc_debug( l, "Chapter %" PRId64 " not found", i_chapter_uid);

        else

        {

            if ( !p_vchapter->EnterAndLeave( vm.GetCurrentVSegment()->CurrentChapter(), false ) )

                vm.JumpTo( *p_vsegment, *p_vchapter );

            b_result = true;

        }

    }

    return b_result;

}

} // namespace