#pragma once
#include <cstring>
#include <string.h>
#include <ctime>
#include <iostream>
#include <cmath>

#include "day_of_week.h"
#include "configuration.h"
#include "time_range.h"

using namespace std;

class Utilities {
public:

	/// <summary>
	/// Get day of week from current date (Zeller's Algorithm), starting day is Sunday
	/// </summary>
	/// <param name="date"></param>
	/// <returns></returns>
	static DayOfWeek GetDayOfWeek(struct tm* tm);

	/// <summary>
	/// Date and time parse helper function
	/// </summary>
	/// <returns>Returns time (tm) structure</returns>
	static struct tm DateTimeToStructTm(const char* dateTimeStr);

	/// <summary>
	/// Date parse helper function
	/// </summary>
	/// <returns>Returns time (tm) structure</returns>
	static struct tm DateToStructTm(const char* dateStr);

	/// <summary>
	/// Time parse helper function
	/// </summary>
	/// <returns>Returns time (tm) structure</returns>
	static struct tm TimeToStructTm(const char* timeStr, int year, int mon, int mday, int wday);

	/// <summary>
	/// Get current local time
	/// </summary>
	/// <returns>Returns time_t structure</returns>
	static time_t GetCurrentLocalTime();

	/// <summary>
	/// Zeller's algorithm for determining day of week
	/// </summary>
	static int ZellersAlgorithm(int day, int month, int year);

	/// <summary>
	///  Checks if current datetime is in range between start and end month of parking worktime
	/// </summary>
	/// <param name="tariff_cfg"></param>
	/// <param name="currentDateTime"></param>
	/// <returns></returns>
	static bool IsYearPeriodActive(Configuration* cfg, struct tm* currentDateTime);

	/// <summary>
	/// Check permissions
	/// </summary>
	static bool CheckSpecialDay(Configuration* cfg, const char* currentDateTimeStr, int* specialDayId, double* specialDayPrice);

	/// <summary>
	/// Calculates price per unit
	/// </summary>
	/// <param name="pra_price"></param>
	/// <returns></returns>
    static double CalculatePricePerUnit(double pra_price, double durationUnit = -1);

};