//! Copyright (C) 2013 Roland Winklmeier
//! This Source Code Form is subject to the terms of the Mozilla Public
//! License, v. 2.0. If a copy of the MPL was not distributed with this
//! file, You can obtain one at http://mozilla.org/MPL/2.0/

#ifndef CONFIG_H
#define CONFIG_H

#include <QtGlobal>
#include <QMap>

namespace BlackMisc
{

    class CValue
    {
    public:

        //! Configuration type enum.
        /*! This enum lists the three different values, used in the config file. */
        typedef enum { CONFIG_STRING = 0,   /*!< Type String. */
                       CONFIG_INT,          /*!< Type Integer. */
                       CONFIG_DOUBLE,       /*!< Type Double. */
                       CONFIG_BOOL,         /*!< Type Bool. */
                       CONFIG_UNKOWN        /*!< Type Unknown. */
                     } TConfigType;

        CValue ();

        CValue (const QString& value);

        void                    init();

        QString&                asString() { return _value; }

        qint32                  asInt( bool* ok = NULL );

        bool                    asBool(bool* ok = NULL );

        double                  asDouble( bool* result );

        inline bool             isValid() {return _type != CONFIG_UNKOWN;}

        inline bool             isInt() { return _type == CONFIG_INT; }
        inline bool             isDouble() { return _type == CONFIG_DOUBLE; }
        inline bool             isBool() { return _type == CONFIG_BOOL; }

    protected:

        QString                 _value;
        TConfigType             _type;

        qint32                  _int_value;
        double                  _double_value;
        bool                    _bool_value;

    };

    //!  Configuration class.
    /*!
      This class implements the configuration part of the library.
    */
    class CConfig
    {
    public:

        CConfig(const QString& filename, const QString& separator = "=", bool isRelative = false);

        //! Sets the value of the specified key.
        /*!
          \param key Key, which value should be set.
          \param value The actual value as T.
        */
        void setValue(const QString& key, const CValue& value);

        //! Returns the value from key.
        /*!
          \param key Specified key.
          \return The value to key 'key' as T&
        */
        CValue value(const QString& key) const;

        //! Function to check if the key is in the config.
        /*!
          \param key Specified key.
          \return Returns true, if key is in the config.
        */
        void add (const QString& key, const CValue& value);

        //! Function to check if the key is in the config.
        /*!
          \param key Specified key.
          \return Returns true, if key is in the config.
        */
        void update (const QString& key, const CValue& value);

        //! Function to check if the key is in the config.
        /*!
          \param key Specified key.
          \return Returns true, if key is in the config.
        */
        bool contains (const QString& key) const;

        //! Removes the key and its value from the config.
        /*!
          \param key Key, which has to be removed.
        */
        void remove (const QString& key);

        //! Displays the configuration to the debug output.
        /*!
          More info.
        */
        void display ();

        /*!
         * Config File section
         */

        //! Returns the config filename of this config object.
        /*!
          \return filename of this config.
        */
        const QString& configFile() const {return m_configfile; }

        //! Loads the config file.
        /*!
          \return Returns true if loading went well.
        */
        bool load ();

        //! Loads the config file.
        /*!
          \param filename Specify a different filename.
          \return Returns true if loading went well.
        */
        bool load (const QString& filename);

        //! Saves the config to file.
        /*!
          \return Returns true if loading went well.
        */
        bool save() {} // TODO

        //! Saves the config to file.
        /*!
          \param filename Specify a different filename.
          \return Returns true if loading went well.
        */
        bool save(const QString& filename) {} // TODO

        protected:

        QString                             m_configfile;
        QString                             m_separator;
        typedef QMap<QString, CValue>       TValueMap;
        TValueMap                           m_value_map;

    };
} //! namespace BlackMisc

#endif // CONFIG_H