#if defined _EventNotifier_included
	#endinput
#endif

#define _EventNotifier_included

#define EVENT_STR_LEN 128
#define EVENT_MAPS_LEN 1024

enum struct EventInfo
{
	int number;
	int start;   // unix timestamp (UTC), 0 if unknown
	int end;     // unix timestamp (UTC), 0 if unknown
	char name[EVENT_STR_LEN];
	char server[EVENT_STR_LEN];
	char rewards[EVENT_STR_LEN];
	char leader[EVENT_STR_LEN];
	char kickers[EVENT_STR_LEN];
	char maps[EVENT_MAPS_LEN];   // ", "-joined list
}

#if !defined EVENTNOTIFIER_CORE

/**
 * Number of events in the last successful fetch (0 before the first fetch).
 *
 * @return                  Event count.
 */
native int EventNotifier_GetEventCount();

/**
 * Whether at least one fetch has succeeded since the plugin loaded.
 *
 * @return                  True once the event list has been fetched.
 */
native bool EventNotifier_HasFetched();

/**
 * Finds an event by its event number.
 *
 * @param number            Event number.
 * @return                  Index into the event list, or -1 if not found.
 */
native int EventNotifier_FindEventByNumber(int number);

/**
 * Copies an event into the caller's EventInfo.
 *
 * @param index             Index into the event list.
 * @param ev                EventInfo to fill.
 * @param size              Size of ev, must be sizeof(EventInfo).
 * @return                  True on success, false if index is out of range.
 * @error                   Buffer smaller than sizeof(EventInfo).
 */
native bool EventNotifier_GetEvent(int index, any[] ev, int size = sizeof(EventInfo));

/**
 * Starts a fetch of the event list now. No-op if a fetch is already running.
 */
native void EventNotifier_Refresh();

/**
 * Called after every successful fetch, once the event list has been replaced.
 */
forward void EventNotifier_OnEventsUpdated();

#endif // EVENTNOTIFIER_CORE

// ---------------------------------------------------------------------------
// Display helpers
// ---------------------------------------------------------------------------

/**
 * Formats a duration in seconds as "1d 2h 3m", "2h 3m" or "3m".
 */
stock void EventNotifier_FormatDuration(int seconds, char[] buffer, int maxlen)
{
	int days = seconds / 86400;
	int hours = (seconds % 86400) / 3600;
	int minutes = (seconds % 3600) / 60;

	if (days > 0)
		Format(buffer, maxlen, "%dd %dh %dm", days, hours, minutes);
	else if (hours > 0)
		Format(buffer, maxlen, "%dh %dm", hours, minutes);
	else
		Format(buffer, maxlen, "%dm", minutes);
}

/**
 * Formats an event's status relative to now as a "Status: ..." line.
 */
stock void EventNotifier_FormatRelativeTime(int start, int end, char[] buffer, int maxlen)
{
	int now = GetTime();

	if (end > 0 && now >= start && now < end)
	{
		strcopy(buffer, maxlen, "Status: In progress now!");
		return;
	}

	char span[32];
	if (now >= start)
	{
		EventNotifier_FormatDuration(now - start, span, sizeof(span));
		Format(buffer, maxlen, "Status: Started %s ago", span);
	}
	else
	{
		EventNotifier_FormatDuration(start - now, span, sizeof(span));
		Format(buffer, maxlen, "Status: Starts in %s", span);
	}
}

#if !defined EVENTNOTIFIER_CORE

public SharedPlugin __pl_EventNotifier =
{
	name = "EventNotifier",
	file = "EventNotifier.smx",

	#if defined REQUIRE_PLUGIN
		required = 1
	#else
		required = 0
	#endif
};

#if !defined REQUIRE_PLUGIN
	public void __pl_EventNotifier_SetNTVOptional()
	{
		MarkNativeAsOptional("EventNotifier_GetEventCount");
		MarkNativeAsOptional("EventNotifier_HasFetched");
		MarkNativeAsOptional("EventNotifier_FindEventByNumber");
		MarkNativeAsOptional("EventNotifier_GetEvent");
		MarkNativeAsOptional("EventNotifier_Refresh");
	}
#endif

#endif // EVENTNOTIFIER_CORE