/**
 * @file   recursivedescent.h
 * @brief  Declaration of a recursive descent IMAP command parser.
 * @author Andreas Aardal Hanssen, Jannis M. Hoffmann
 * @date   2002-2023
 */

#ifndef expectcommand_h_inluded
#define expectcommand_h_inluded

#include "imapparser.h"
#include "session.h"

#include <stack>
#include <string>

namespace Binc {

  class Parser {
    std::stack<int> inputBuffer;
    int charnr;
    Session &session;

  public:
    Parser(Session &session) : charnr(0), session(session){};
    Parser(const Parser &) = delete;

    int readChar();
    void unReadChar(int c_in);
    void unReadChar(const std::string &s_in);

    enum class ParseResult { ACCEPT, REJECT, ERROR, TIMEOUT };

    ParseResult expectTag(std::string &s_in);
    ParseResult expectTagChar(int &c_in);
    ParseResult expectSPACE();

    ParseResult expectFlag(std::vector<std::string> &v_in);

    ParseResult expectListMailbox(std::string &s_in);
    ParseResult expectListWildcards(int &c_in);

    ParseResult expectDateTime(std::string &s_in);
    ParseResult expectTime(std::string &s_in);
    ParseResult expectZone(std::string &s_in);

    ParseResult expectMailbox(std::string &s_in);
    ParseResult expectAstring(std::string &s_in);
    ParseResult expectAtom(std::string &s_in);
    ParseResult expectAtomChar(int &i_in);
    ParseResult expectString(std::string &s_in);

    ParseResult expectDate(std::string &s_in);

    ParseResult expectNumber(unsigned int &i_in);
    ParseResult expectDigit(unsigned int &i_in);
    ParseResult expectDigitNZ(unsigned int &i_in);

    ParseResult expectLiteral(std::string &s_in);
    ParseResult expectQuoted(std::string &s_in);
    ParseResult expectQuotedChar(int &c_in);

    ParseResult expectSet(SequenceSet &s_in);
    ParseResult expectSequenceNum(unsigned int &i_in);
    ParseResult expectNZNumber(unsigned int &i_in);

    ParseResult expectCRLF();
    ParseResult expectCR();
    ParseResult expectLF();

    ParseResult expectThisString(const std::string &s_in);
  };
}

#endif