#ifndef __POP3Session_h__
#define __POP3Session_h__

#include "TCPServer.h"
#include "TCPSession.h"
#include "MailFolder.h"
#include <set>

#define CRLF "\r\n"

namespace mail {

   class POP3Session : public core::TCPSession {

    public:
      POP3Session(core::EPoll &ePoll, core::TCPServer &server)
	: TCPSession(ePoll, &server, "POP3 Client Session") {}

      std::string clientDomainName;

      // RFC 1939 4/7: USER sets the pending username and replies +OK
      // without checking anything - only PASS actually authenticates
      // (against MailFileSystem::checkPassword(), shared with SMTP AUTH
      // and IMAP LOGIN). userName is meaningless until PASS succeeds;
      // authenticated gates every other command per RFC 1939 3's state
      // diagram (AUTHORIZATION vs TRANSACTION state).
      std::string userName;
      bool authenticated = false;

      // Loaded once, right after a successful PASS - POP3 has no
      // folder concept (RFC 1939 has no SELECT-equivalent), it only
      // ever operates on Inbox. RFC 1939 3's "maildrop" message
      // numbering is fixed for the whole session (assigned once here,
      // not re-derived per command) even if new mail is delivered
      // mid-session - deletedMarks/QUIT below follow the same
      // session-frozen-snapshot model.
      MailFolder mailbox;

      // RFC 1939 3: DELE only MARKS a message deleted - the mark (and
      // any RSET undoing it) is session-local and has no effect until
      // QUIT actually commits it by unlinking the marked messages.
      // Keyed by 1-based POP3 message number (this session's frozen
      // ordering), not UID.
      std::set<int> deletedMarks;

      // RFC 1939 4: the server must send a positive greeting before the
      // client sends anything.
      void onConnected() override {
	 out << "+OK POP3 server ready" << CRLF;
      }

   };

}

#endif