/*
 * Modification History
 *
 * 2002-September-16    Jason Rohrer
 * Created.
 * Fixed a memory leak.
 *
 * 2002-September-25    Jason Rohrer
 * Added a setSetting function that takes a string value.
 *
 * 2002-September-26    Jason Rohrer
 * Added functions for integer values.
 *
 * 2003-August-24    Jason Rohrer
 * Fixed to remove 499-character limit for a setting value.
 */

#include "minorGems/common.h"



#ifndef SETTINGS_MANAGER_INCLUDED
#define SETTINGS_MANAGER_INCLUDED



#include "minorGems/util/SimpleVector.h"
#include "minorGems/system/MutexLock.h"

#include <stdio.h>



// utility class for dealing with static member dealocation
class SettingsManagerStaticMembers;



/**
 * Class that manages program settings.
 *
 * @author Jason Rohrer
 */
class SettingsManager {



    public:



        /**
         * Sets the directory name where settings are stored.
         *
         * @param inName the name of the directory (relative to the
         *   program's working directory).
         *   Must be destroyed by caller.
         */
        static void setDirectoryName( char *inName );



        /**
         * Gets the directory name where settings are stored.
         *
         * @return the name of the directory (relative to the
         *   program's working directory).
         *   Must be destroyed by caller if non-const.
         */
        static char *getDirectoryName();



        /**
         * Gets a setting.
         *
         * @param inSettingName the name of the setting to get.
         *   Must be destroyed by caller if non-const.
         *
         * @return a vector of strings representing the setting value.
         *   The vector and the strings it contains must be destroyed
         *   by the caller.
         */
        static SimpleVector<char *> *getSetting( char *inSettingName );



        /**
         * Gets a string setting.
         *
         * @param inSettingName the name of the setting to get.
         *   Must be destroyed by caller if non-const.
         *         
         * @return the setting value string, or NULL if no setting
         *   value can be read.
         *   Must be destroyed by caller if non-NULL.
         */
        static char *getStringSetting( char *inSettingName );


        /**
         * Gets a float setting.
         *
         * @param inSettingName the name of the setting to get.
         *   Must be destroyed by caller if non-const.
         * @param outValueFound pointer to where flag should be returned
         *   indicating whether or not the value was found.
         *   Set to true if the value was found, false otherwise.
         *         
         * @return the setting value.
         */
        static float getFloatSetting( char *inSettingName,
                                      char *outValueFound );

        
        
        /**
         * Gets an integer setting.
         *
         * @param inSettingName the name of the setting to get.
         *   Must be destroyed by caller if non-const.
         * @param outValueFound pointer to where flag should be returned
         *   indicating whether or not the value was found.
         *   Set to true if the value was found, false otherwise.
         *         
         * @return the setting value.
         */
        static int getIntSetting( char *inSettingName,
                                  char *outValueFound );
        
        

        /**
         * Sets a setting.
         *
         * @param inSettingName the name of the setting to set.
         *   Must be destroyed by caller if non-const.
         * @param inSettingVector a vector of strings representing the
         *   setting value.
         *   The vector and the strings it contains must be destroyed
         *   by the caller.
         */
        static void setSetting( char *inSettingName,
                                SimpleVector<char *> *inSettingVector );



        /**
         * Sets a setting to a single float value.
         *
         * @param inSettingName the name of the setting to set.
         *   Must be destroyed by caller if non-const.
         * @param inSettingValue the value to set.
         */
        static void setSetting( char *inSettingName,
                                float inSettingValue );


        
        /**
         * Sets a setting to a single int value.
         *
         * @param inSettingName the name of the setting to set.
         *   Must be destroyed by caller if non-const.
         * @param inSettingValue the value to set.
         */
        static void setSetting( char *inSettingName,
                                int inSettingValue );


        
        /**
         * Sets a setting to a single string value.
         *
         * @param inSettingName the name of the setting to set.
         *   Must be destroyed by caller if non-const.
         * @param inSettingValue the value to set.
         *   Must be destroyed by caller.
         */
        static void setSetting( char *inSettingName,
                                char *inSettingValue );

        
        
    protected:


        
        static SettingsManagerStaticMembers mStaticMembers;



        /**
         * Gets the file for a setting name.
         *
         * @param inSettingName the name of the setting.
         *   Must be destroyed by caller if non-const.
         * @param inReadWriteFlags the flags to pass into the
         *   fopen call.  For example, "r" or "w".
         *
         * @return the file descriptor, or NULL if the open failed.
         *   Must be fclose()'d by caller if non-NULL.
         */
        static FILE *getSettingsFile( char *inSettingName,
                                      const char *inReadWriteFlags );

        

        /**
         * Gets the file name for a setting.
         *
         * @param inSettingName the name of the setting.
         *   Must be destroyed by caller if non-const.
         *
         * @return the name of the settings file.
         *   Must be destroyed by caller.
         */
        static char *getSettingsFileName( char *inSettingName );
        

        
    };



/**
 * Container for static members to allow for their proper destruction
 * on program termination.
 *
 * @author Jason Rohrer
 */
class SettingsManagerStaticMembers {


        
    public:


        
        SettingsManagerStaticMembers();
        ~SettingsManagerStaticMembers();
        
        char *mDirectoryName;



    };



#endif