#ifndef _MATHS_H_
#define _MATHS_H_

#include <cmath>
#include <fstream>
#include <tuple>
#include <nlohmann/json.hpp>
using json = nlohmann::json;

#include "../connections/common/common.h"
#include "../connections/sql/db_handle.h"

namespace norm {
	float norm(cycle_t);
	cycle_t history_to_cycle(ws_msg_parsed<WS_EVENT_HISTORY_UPDATE>);
	cycle_t diff_vector(cycle_t, cycle_t);
	std::map<std::string, float> diff_all(
		pqxx::connection *C,
		cycle_t base_cycle,
		std::map<std::string, cycle_t> cycles,
		std::vector<std::string> userid_list,
		long ts_high,
		long ts_low,
		float threshold);
	std::map<std::string, std::map<std::string, float>> diff_map(
		pqxx::connection *C,
		std::vector<std::string> userid_list,
		long,
		long,
		float);
	void diff_save_json(
		pqxx::connection *,
		std::map<std::string,std::map<std::string, float>>);
}

namespace optimizer{
	std::tuple<long, long> get_last_nth_cycle_ts(int);
	float get_last_n_weighted_slope(
		pqxx::connection*,
		std::string,
		int,
		int);
}

#endif