#include "audio_paths.nvgt"

funcdef void notification_speak_callback(const string &in message, bool interrupt);

string[] notificationsHistory;
string[] notificationsQueue;

int notificationsMaxHistory = 10;
int notificationsDelayMs = 3000;
int notificationsCurrentIndex = -1;
bool notificationsActive = false;
timer notificationsDelayTimer;
sound notificationsSound;
bool notificationsWaitingForSound = false;
string notificationsSoundPath = "sounds/notify";
notification_speak_callback@ notificationsSpeakCallback = null;

void notifications_set_speak_callback(notification_speak_callback@ callback) {
	@notificationsSpeakCallback = @callback;
}

void notifications_set_sound_path(const string soundPath) {
	notificationsSoundPath = soundPath;
}

void notifications_set_delay_ms(int delayMs) {
	if (delayMs < 0) {
		delayMs = 0;
	}
	notificationsDelayMs = delayMs;
}

void notifications_set_max_history(int maxCount) {
	if (maxCount < 1) {
		maxCount = 1;
	}
	notificationsMaxHistory = maxCount;

	while (notificationsHistory.length() > uint(notificationsMaxHistory)) {
		notificationsHistory.remove_at(0);
	}

	if (notificationsHistory.length() == 0) {
		notificationsCurrentIndex = -1;
	} else if (notificationsCurrentIndex >= int(notificationsHistory.length())) {
		notificationsCurrentIndex = notificationsHistory.length() - 1;
	}
}

void notifications_clear() {
	notificationsHistory.resize(0);
	notificationsQueue.resize(0);
	notificationsCurrentIndex = -1;
	notificationsActive = false;
	notificationsWaitingForSound = false;
	notificationsSound.close();
}

void notifications_speak(const string &in message, bool interrupt) {
	if (@notificationsSpeakCallback !is null) {
		notificationsSpeakCallback(message, interrupt);
		return;
	}
	screen_reader_speak(message, interrupt);
}

void notifications_enqueue(const string &in message) {
	notificationsQueue.insert_last(message);
	notificationsHistory.insert_last(message);

	while (notificationsHistory.length() > uint(notificationsMaxHistory)) {
		notificationsHistory.remove_at(0);
	}

	notificationsCurrentIndex = notificationsHistory.length() - 1;
}

bool notifications_try_play_sound() {
	string resolvedPath = resolve_audio_path(notificationsSoundPath);
	if (resolvedPath == "") {
		return false;
	}

	notificationsSound.close();
	if (!notificationsSound.load(resolvedPath)) {
		return false;
	}

	notificationsSound.play();
	return true;
}

void notifications_update() {
	if (notificationsQueue.length() == 0) {
		if (notificationsActive && notificationsDelayTimer.elapsed >= notificationsDelayMs) {
			notificationsActive = false;
		}
		return;
	}

	if (notificationsActive && notificationsDelayTimer.elapsed < notificationsDelayMs) {
		return;
	}

	if (notificationsWaitingForSound) {
		if (notificationsSound.playing) {
			return;
		}

		notifications_speak(notificationsQueue[0], true);
		notificationsQueue.remove_at(0);
		notificationsWaitingForSound = false;
		notificationsActive = true;
		notificationsDelayTimer.restart();
		return;
	}

	if (notifications_try_play_sound()) {
		notificationsWaitingForSound = true;
		return;
	}

	notifications_speak(notificationsQueue[0], true);
	notificationsQueue.remove_at(0);
	notificationsActive = true;
	notificationsDelayTimer.restart();
}

void notifications_check_keys() {
	if (key_pressed(KEY_LEFTBRACKET)) {
		if (notificationsHistory.length() == 0) {
			notifications_speak("No notifications.", true);
			return;
		}

		notificationsCurrentIndex--;
		if (notificationsCurrentIndex < 0) {
			notificationsCurrentIndex = 0;
			notifications_speak("Oldest notification. " + notificationsHistory[notificationsCurrentIndex], true);
			return;
		}

		int position = notificationsCurrentIndex + 1;
		notifications_speak(notificationsHistory[notificationsCurrentIndex] + " " + position + " of " + notificationsHistory.length(), true);
		return;
	}

	if (key_pressed(KEY_RIGHTBRACKET)) {
		if (notificationsHistory.length() == 0) {
			notifications_speak("No notifications.", true);
			return;
		}

		notificationsCurrentIndex++;
		if (notificationsCurrentIndex >= int(notificationsHistory.length())) {
			notificationsCurrentIndex = notificationsHistory.length() - 1;
			notifications_speak("Newest notification. " + notificationsHistory[notificationsCurrentIndex], true);
			return;
		}

		int position = notificationsCurrentIndex + 1;
		notifications_speak(notificationsHistory[notificationsCurrentIndex] + " " + position + " of " + notificationsHistory.length(), true);
		return;
	}

	if (key_pressed(KEY_BACKSLASH)) {
		if (notificationsHistory.length() == 0) {
			notifications_speak("No notifications.", true);
			return;
		}

		notificationsCurrentIndex = notificationsHistory.length() - 1;
		notifications_speak(notificationsHistory[notificationsCurrentIndex], true);
	}
}