/*
 * DataReader.hh
 *
 *  Created on: Nov 7, 2010
 *      Author: lamikr
 */

#ifndef DATAREADER_H_
#define DATAREADER_H_

#include <string>
#include <vector>

#include "Data.hh"
#include "Date.hh"
#include "DeviceConfig.hh"

#include <time.h>

namespace plp {
	/**
	 * DataReader is able to read old data from the device.
	 */
	class DataReader {
		public:
			DataReader(std::string device_id);
			virtual ~DataReader();
			DataRange *get_data_range();
			/**
			 * Get monthly summary data.
			 * Depending from the device type, it may be daily mean value, daily delta, highest value, etc...
			 */
			DataRange *get_yearly_summary(Date *date, EnumSummaryCalculationType calc_type);
			DataRange *get_yearly_summary(Date *date);
			DataRange *get_yearly_summary(Date *start_date, Date *end_date);
			/**
			 * Get monthly summary data.
			 * Depending from the device type, it may be daily mean value, daily delta, highest value, etc...
			 */
			DataRange *get_monthly_summary(Date *date, EnumSummaryCalculationType calc_type);
			DataRange *get_monthly_summary(Date *date);
			DataRange *get_monthly_summary(Date *start_date, Date *end_date);

			/**
			 * Get daily summary data calculated from the daily data items.
			 * Depending from the device type, it may be daily mean value, daily delta, highest value, etc...
			 */
			/*
			 * Get Daily summary from the latest date
			 */
			DataRange *get_daily_summary();
			/*
			 * Get Daily summary specified by the calc_type from the latest date.
			 */
			DataRange *get_daily_summary(EnumSummaryCalculationType calc_type);
			DataRange *get_daily_summary(Date *date, EnumSummaryCalculationType calc_type);
			DataRange *get_daily_summary(Date *date);
			DataRange *get_daily_summary(Date *start_date, Date *end_date);

			DataRange *get_hourly_summary(Date *date, EnumSummaryCalculationType calc_type);
			DataRange *get_hourly_summary(Date *date);
			DataRange *get_hourly_summary(Date *start_date, Date *end_date);

			DataRange *get_data(Date *start_date, Date *end_date);
			std::string get_device_id();
			bool get_device_type(std::string& type_param);
			Data *get_latest_data();
		protected:
			std::string			device_id;
			std::string			device_dir;
			std::string			device_ch_dir;
			DeviceConfig			*device_config;
			EnumSummaryCalculationType	summary_calc_type;
			Data *find_oldest_data(std::vector<std::string> year_vector);
			Data *find_latest_data(std::vector<std::string> year_vector);
			DataRange *get_summary(Date *date_param,
					EnumSummaryCalculationType calc_type_param,
					EnumSummaryPeriod period_type_param);
	};
}

#endif /* DATAREADER_H_ */