<?php
/**
 * ownCloud - Richdocuments App
 *
 * @author Victor Dubiniuk
 * @copyright 2015 Victor Dubiniuk victor.dubiniuk@gmail.com
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 */

namespace OCA\Richdocuments;

use OCA\Richdocuments\AppInfo\Application;
use \OCP\IConfig;

class AppConfig {
	public const WOPI_URL = 'wopi_url';
	public const PUBLIC_WOPI_URL = 'public_wopi_url';

	public const FEDERATION_USE_TRUSTED_DOMAINS = 'federation_use_trusted_domains';

	public const SYSTEM_GS_TRUSTED_HOSTS = 'gs.trustedHosts';

	public const READ_ONLY_FEATURE_LOCK = 'read_only_feature_lock';

	private $defaults = [
		'wopi_url' => '',
		'timeout' => 15,
		'watermark_text' => '{userId}',
		'watermark_allGroupsList' => [],
		'watermark_allTagsList' => [],
		'watermark_linkTagsList' => [],
		'token_ttl' => 36000, // 10 hours
	];

	public const WATERMARK_APP_NAMESPACE = 'files';

	public const APP_SETTING_TYPES = [
		'watermark_allGroupsList' => 'array',
		'watermark_allTagsList' => 'array',
		'watermark_linkTagsList' => 'array'
	];

	/** @var IConfig */
	private $config;

	public function __construct(IConfig $config) {
		$this->config = $config;
	}

	public function getAppNamespace($key) {
		if (strpos($key, 'watermark_') === 0) {
			return self::WATERMARK_APP_NAMESPACE;
		}
		return Application::APPNAME;
	}

	/**
	 * Get a value by key
	 * @param string $key
	 * @return string
	 */
	public function getAppValue($key) {
		$defaultValue = null;
		if (array_key_exists($key, $this->defaults)) {
			$defaultValue = $this->defaults[$key];
		}
		return $this->config->getAppValue($this->getAppNamespace($key), $key, $defaultValue);
	}

	/**
	 * @param $key
	 * @return array
	 */
	public function getAppValueArray($key) {
		$value = $this->config->getAppValue($this->getAppNamespace($key), $key, []);
		if (array_key_exists($key, self::APP_SETTING_TYPES) && self::APP_SETTING_TYPES[$key] === 'array') {
			$value = $value !== '' ? explode(',', $value) : [];
		}
		return $value;
	}

	/**
	 * Set a value by key
	 * @param string $key
	 * @param string $value
	 * @return void
	 */
	public function setAppValue($key, $value) {
		$this->config->setAppValue($this->getAppNamespace($key), $key, $value);
	}

	/**
	 * Get all app settings
	 * @return array
	 */
	public function getAppSettings() {
		$result = [];
		$keys = $this->config->getAppKeys(Application::APPNAME);
		foreach ($keys as $key) {
			$value = $this->getAppValueArray($key);
			$value = $value === 'yes' ? true : $value;
			$result[$key] = $value === 'no' ? false : $value;
		}

		$keys = $this->config->getAppKeys(self::WATERMARK_APP_NAMESPACE);
		foreach ($keys as $key) {
			if (strpos($key, 'watermark_') === 0) {
				$value = $this->getAppValueArray($key);
				$value = $value === 'yes' ? true : $value;
				$result[$key] = $value === 'no' ? false : $value;
			}
		}
		return $result;
	}

	/**
	 * Returns a list of trusted domains from the gs.trustedHosts config
	 */
	public function getGlobalScaleTrustedHosts(): array {
		return $this->config->getSystemValue(self::SYSTEM_GS_TRUSTED_HOSTS, []);
	}

	/**
	 * Returns if federation trusted domains should be always allowed for federated editing
	 */
	public function isTrustedDomainAllowedForFederation(): bool {
		return $this->config->getAppValue(Application::APPNAME, self::FEDERATION_USE_TRUSTED_DOMAINS, 'no') === 'yes';
	}

	public function getCollaboraUrlPublic(): string {
		return $this->config->getAppValue(Application::APPNAME, self::PUBLIC_WOPI_URL, $this->getCollaboraUrlInternal());
	}

	public function getCollaboraUrlInternal(): string {
		return $this->config->getAppValue(Application::APPNAME, self::WOPI_URL, '');
	}

	public function getUseGroups(): ?array {
		$groups = $this->config->getAppValue(Application::APPNAME, 'use_groups', '');
		if ($groups === '') {
			return null;
		}

		return $this->splitGroups($groups);
	}

	public function getEditGroups(): ?array {
		$groups = $this->config->getAppValue(Application::APPNAME, 'edit_groups', '');
		if ($groups === '') {
			return null;
		}

		return $this->splitGroups($groups);
	}

	public function isReadOnlyFeatureLocked(): bool {
		return $this->config->getAppValue(Application::APPNAME, self::READ_ONLY_FEATURE_LOCK, 'no') === 'yes';
	}

	private function splitGroups(string $groupString): array {
		return explode('|', $groupString);
	}

	/**
	 * Allow to override values from the WOPI checkFileInfo response through app config
	 */
	public function getWopiOverride(): array {
		$wopiOverride = $this->config->getAppValue(Application::APPNAME, 'wopi_override', '');
		if ($wopiOverride !== '') {
			$wopiOverride = json_decode($wopiOverride, true);
			return $wopiOverride ?: [];
		}
		return [];
	}
}