/*!
 * \file file_configuration.cc
 * \brief Implementation of the interface ConfigurationInterface that reads the
 * configuration from a file.
 * \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
 *
 * This implementation has a text file as the source for the values of the parameters.
 * The file is in the INI format, containing sections and pairs of names and values.
 * For more information about the INI format, see http://en.wikipedia.org/wiki/INI_file
 *
 * -------------------------------------------------------------------------
 *
 * Copyright (C) 2010-2011  (see AUTHORS file for a list of contributors)
 *
 * GNSS-SDR is a software defined Global Navigation
 *          Satellite Systems receiver
 *
 * This file is part of GNSS-SDR.
 *
 * GNSS-SDR 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.
 *
 * GNSS-SDR 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 GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
 *
 * -------------------------------------------------------------------------
 */



#include "file_configuration.h"
#include <string>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include "INIReader.h"
#include "string_converter.h"
#include "in_memory_configuration.h"

using google::LogMessage;

FileConfiguration::FileConfiguration(std::string filename)
{
    filename_ = filename;
    init();
}

FileConfiguration::FileConfiguration()
{
    filename_ = "./default_config_file.txt";
    init();
}

FileConfiguration::~FileConfiguration()
{
    LOG_AT_LEVEL(INFO) << "Destructor called";
    delete ini_reader_;
    delete converter_;
    delete overrided_;
}

std::string FileConfiguration::property(std::string property_name, std::string default_value)
{

    if(overrided_->is_present(property_name))
        {
            return overrided_->property(property_name, default_value);
        }
    else
        {
            return ini_reader_->Get("GNSS-SDR", property_name, default_value);
        }
}

bool FileConfiguration::property(std::string property_name, bool default_value)
{

    if(overrided_->is_present(property_name))
        {
            return overrided_->property(property_name, default_value);
        }
    else
        {
            std::string empty = "";
            return converter_->convert(property(property_name, empty), default_value);
        }
}

long FileConfiguration::property(std::string property_name, long default_value)
{

    if(overrided_->is_present(property_name))
        {
            return overrided_->property(property_name, default_value);
        }
    else
        {
            std::string empty = "";
            return converter_->convert(property(property_name, empty), default_value);
        }
}

int FileConfiguration::property(std::string property_name, int default_value)
{

    if(overrided_->is_present(property_name)) {

            return overrided_->property(property_name, default_value);
    }
    else
        {
            std::string empty = "";
            return converter_->convert(property(property_name, empty), default_value);
        }
}

unsigned int FileConfiguration::property(std::string property_name, unsigned int default_value)
{
    if(overrided_->is_present(property_name))
        {
            return overrided_->property(property_name, default_value);
        }
    else
        {
            std::string empty = "";
            return converter_->convert(property(property_name, empty), default_value);
        }
}

float FileConfiguration::property(std::string property_name, float default_value)
{
    if(overrided_->is_present(property_name))
        {
            return overrided_->property(property_name, default_value);
        }
    else
        {
            std::string empty = "";
            return converter_->convert(property(property_name, empty), default_value);
        }
}

double FileConfiguration::property(std::string property_name, double default_value)
{
    if(overrided_->is_present(property_name))
        {
            return overrided_->property(property_name, default_value);
        }
    else
        {
            std::string empty = "";
            return converter_->convert(property(property_name, empty), default_value);
        }
}

void FileConfiguration::set_property(std::string property_name, std::string value)
{
    overrided_->set_property(property_name, value);
}

void FileConfiguration::init()
{

    converter_ = new StringConverter();
    overrided_ = new InMemoryConfiguration();

    ini_reader_ = new INIReader(filename_);
    error_ = ini_reader_->ParseError();

    if(error_ == 0)
        {
            DLOG(INFO) << "Configuration file " << filename_ << " opened with no errors";
        }
    else if(error_ > 0)
        {
            LOG_AT_LEVEL(WARNING) << "Configuration file " << filename_ << " contains errors in line " << error_;
        }
    else
        {
            LOG_AT_LEVEL(WARNING) << "Unable to open configuration file " << filename_;
        }

}