#pragma once

#include <ctime>
#include <string>
#include <vector>

namespace radiantwave::timezone {

struct TimeZoneInfo {
    std::string display_name;
    std::string iana_code;
};

struct CountryTimeZones {
    std::string country_name;
    std::vector<TimeZoneInfo> zones;
};

// Returns standard Linux / IANA timezones grouped by country
const std::vector<CountryTimeZones>& getStandardTimeZones();

// Converts a UTC timestamp to the user's configured IANA timezone
std::string formatUtcToTimezone(time_t utc_time, const std::string& iana_code, const std::string& format = "%Y-%m-%d %H:%M:%S %Z");

// Wall-clock minutes since midnight (0-1439) right now in `iana_code`. Used by
// the schedule to pick the active listening block. Falls back to UTC when the
// timezone is empty.
int currentLocalMinutes(const std::string& iana_code);

// Weekday right now in `iana_code`, 0=Monday .. 6=Sunday. Falls back to UTC when
// the timezone is empty.
int currentLocalWeekday(const std::string& iana_code);

// Gets current UTC timestamp as ISO string
std::string getUtcTimestampIso();

} // namespace radiantwave::timezone