<?php
/**
 * Copyright 2026, Dreytac <dreytac@hobbyhome.net>
 * 
 * This file is part of Kirby Deluge.
 *
 * Kirby Deluge is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License version 3 as published by the Free Software Foundation.
 *
 * Kirby Deluge is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License along with Kirby Deluge. If not, see <https://www.gnu.org/licenses/>. 
 */

return function ($page) {
	$currentStreams = $page->currentStreams()->toInt();
	$lastSeen = $page->lastSeen()->toInt();

	$curl = curl_init($page->delugeUrl()->toString() . "/json");
	$curlOptions = [
		CURLOPT_RETURNTRANSFER => true,
		CURLOPT_HEADER => true,
		CURLOPT_HTTPHEADER => ["Accept: application/json", "Content-Type: application/json"],
		CURLOPT_ENCODING => "",
		CURLOPT_COOKIEJAR => "",
		CURLOPT_CONNECTTIMEOUT => 10,
		CURLOPT_TIMEOUT => 10,
		CURLOPT_SSL_VERIFYPEER => true,
		CURLINFO_HEADER_OUT => true,
	];
	curl_setopt_array($curl, $curlOptions);

	$reqId = 0;
	$response = site()->makeRequest($curl, $reqId, "auth.login", [$page->delugePassword()->toString()]);
	$reqId++;

	if (get("s") == "inc") {
		// Increment number of streams and ensure speeds are set to minimums.
		$currentStreams++;
		$lastSeen = time();

		site()->makeRequest($curl, $reqId, "core.set_config", [["max_download_speed" => $page->minDownSpeed()->toInt()]]);
		$reqId++;
		site()->makeRequest($curl, $reqId, "core.set_config", [["max_upload_speed" => $page->minUpSpeed()->toInt()]]);
	} elseif (get("s") == "dec") {
		// Decrement number of streams and, if 0 active streams, ensure speeds are set to maximum.
		$currentStreams--;

		if ($lastSeen > 0) {
			if ($lastSeen < time() - ($page->maxTimeAtMin()->toInt() * 60)) {
				// Assume the sessions have finished and clear them.
				$currentStreams = 0;
				$lastSeen = 0;
			}
		}

		if ($currentStreams <= 0) {
			site()->makeRequest($curl, $reqId, "core.set_config", [["max_download_speed" => $page->maxDownSpeed()->toInt()]]);
			$reqId++;
			site()->makeRequest($curl, $reqId, "core.set_config", [["max_upload_speed" => $page->maxUpSpeed()->toInt()]]);
		}
	} elseif (get("s") == "reset") {
		// Reset streams and speeds back to 0 and maximum respectively.
		$currentStreams = 0;
		$lastSeen = 0;

		site()->makeRequest($curl, $reqId, "core.set_config", [["max_download_speed" => $page->maxDownSpeed()->toInt()]]);
		$reqId++;
		site()->makeRequest($curl, $reqId, "core.set_config", [["max_upload_speed" => $page->maxUpSpeed()->toInt()]]);
	} elseif (get("s") == "update") {
		// Forceably get a list of active sessions from Jellyfin and update Deluge accordingly.
		$jfCurl = curl_init($page->jellyfinUrl()->toString() . "/Sessions");
		$jfCurlOptions = [
			CURLOPT_RETURNTRANSFER => true,
			// CURLOPT_HEADER => true,
			CURLOPT_HTTPHEADER => ["Accept: application/json", "Content-Type: application/json", "Authorization: MediaBrowser Token=\"{$page->jellyfinApiKey()->toString()}\""],
			CURLOPT_ENCODING => "",
			CURLOPT_COOKIEJAR => "",
			CURLOPT_CONNECTTIMEOUT => 10,
			CURLOPT_TIMEOUT => 10,
			CURLOPT_SSL_VERIFYPEER => true,
			CURLINFO_HEADER_OUT => true,
			CURLOPT_VERBOSE => true,
		];
		curl_setopt_array($jfCurl, $jfCurlOptions);

		$sessions = site()->makeRequest($jfCurl, $reqId, "get");
		$reqId++;
		curl_close($jfCurl);

		$sessionsActive = 0;
		if (!is_null($sessions)) {
			foreach ($sessions as $session) {
				if (isset($session["NowPlayingItem"])) {
					if ($session["NowPlayingItem"]["Type"] !== "Audio") {
						$sessionsActive++;
					}
				}
			}

			if ($sessionsActive == 0) {
				// There are no sessions active. Set to maximum speed.
				$currentStreams = 0;
				$lastSeen = 0;

				site()->makeRequest($curl, $reqId, "core.set_config", [["max_download_speed" => $page->maxDownSpeed()->toInt()]]);
				$reqId++;
				site()->makeRequest($curl, $reqId, "core.set_config", [["max_upload_speed" => $page->maxUpSpeed()->toInt()]]);
			} else {
				// There are sessions active. Set to minimum speed.
				$currentStreams = $sessionsActive;
				$lastSeen = time();

				site()->makeRequest($curl, $reqId, "core.set_config", [["max_download_speed" => $page->minDownSpeed()->toInt()]]);
				$reqId++;
				site()->makeRequest($curl, $reqId, "core.set_config", [["max_upload_speed" => $page->minUpSpeed()->toInt()]]);
			}
		} else {
			// We couldn't access Jellyfin. Assume there's something wrong and that no sessions are active.
			$currentStreams = 0;
			$lastSeen = 0;

			site()->makeRequest($curl, $reqId, "core.set_config", [["max_download_speed" => $page->maxDownSpeed()->toInt()]]);
			$reqId++;
			site()->makeRequest($curl, $reqId, "core.set_config", [["max_upload_speed" => $page->maxUpSpeed()->toInt()]]);
		}
	}

	// We should never have less than 0 streams active.
	$currentStreams = $currentStreams < 0 ? 0 : $currentStreams;

	$page = kirby()->impersonate("kirby", function () use ($page, $currentStreams, $lastSeen) {
		return $page->update([
			"currentStreams" => $currentStreams,
			"lastSeen" => $lastSeen,
		]);
	});

	curl_close($curl);

	if (!($user = kirby()->user() and $user->role()->isAdmin())) {
		// Limit access to page to administrators only.
		echo new Response(Data::encode(["currentStreams" => $currentStreams, "lastSeen" => $lastSeen], "json"), "text/json");
		exit();
	}

	return compact("page");
};