/*
 * Copyright (c) 2010-2020 Belledonne Communications SARL.
 *
 * This file is part of linphone-desktop
 * (see https://www.linphone.org).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef CLI_H_
#define CLI_H_

#include <memory>

#include <QHash>
#include <QMap>
#include <QObject>

// =============================================================================

namespace linphone {
  class Address;
}

class Cli : public QObject {
  Q_OBJECT;

  typedef void (*Function)(QHash<QString, QString> &);

  enum ArgumentType {
    String
  };

  struct Argument {
    Argument (ArgumentType type = String, bool isOptional = false) {
      this->type = type;
      this->isOptional = isOptional;
    }

    ArgumentType type;
    bool isOptional;
  };

  class Command {
  public:
    Command () = default;
    Command (
      const QString &functionName,
      const char *functionDescription,
      Function function,
      const QHash<QString, Argument> &argsScheme
    );

    void execute (QHash<QString, QString> &args) const;
    void executeUri (const std::shared_ptr<linphone::Address> &address) const;

    const char *getFunctionDescription () const {
      return mFunctionDescription;
    }

    QString getFunctionSyntax () const ;

  private:
    QString mFunctionName;
    const char *mFunctionDescription;
    Function mFunction = nullptr;
    QHash<QString, Argument> mArgsScheme;
  };

public:
  enum CommandFormat {
    UnknownFormat,
    CliFormat,
    UriFormat
  };

  static void executeCommand (const QString &command, CommandFormat *format = nullptr);

  static void showHelp ();

private:
  Cli ();

  static std::pair<QString, Command> createCommand (
    const QString &functionName,
    const char *functionDescription,
    Function function,
    const QHash<QString, Argument> &argsScheme = QHash<QString, Argument>()
  );

  static QString parseFunctionName (const QString &command);
  static QHash<QString, QString> parseArgs (const QString &command);

  static QMap<QString, Command> mCommands;

  static QRegExp mRegExpArgs;
  static QRegExp mRegExpFunctionName;
};

#endif // CLI_H_