<?php

declare(strict_types=1);

namespace OCA\F7Push\Service;

use OCP\IConfig;
use OCP\IURLGenerator;
use OCP\Security\ISecureRandom;

class ConfigService {
	public const APP_ID = 'f7push';

	public function __construct(
		private IConfig $config,
		private IURLGenerator $urlGenerator,
		private ISecureRandom $secureRandom,
	) {
	}

	public function isEnabled(): bool {
		return $this->config->getAppValue(self::APP_ID, 'enabled', 'yes') === 'yes';
	}

	public function listenNotifications(): bool {
		return $this->config->getAppValue(self::APP_ID, 'listen_notifications', 'yes') === 'yes';
	}

	public function getFirebaseProjectId(): string {
		return trim($this->config->getAppValue(self::APP_ID, 'firebase_project_id', ''));
	}

	public function getFirebaseCredentials(): string {
		return trim($this->config->getAppValue(self::APP_ID, 'firebase_credentials', ''));
	}

	public function isFirebaseConfigured(): bool {
		return $this->getFirebaseProjectId() !== '' && $this->getFirebaseCredentials() !== '';
	}

	public function getApiSecret(): string {
		$secret = trim($this->config->getAppValue(self::APP_ID, 'api_secret', ''));
		if ($secret === '') {
			$secret = $this->secureRandom->generate(48, ISecureRandom::CHAR_ALPHANUMERIC);
			$this->config->setAppValue(self::APP_ID, 'api_secret', $secret);
		}
		return $secret;
	}

	public function regenerateApiSecret(): string {
		$secret = $this->secureRandom->generate(48, ISecureRandom::CHAR_ALPHANUMERIC);
		$this->config->setAppValue(self::APP_ID, 'api_secret', $secret);
		return $secret;
	}

	public function isSourceEnabled(string $source): bool {
		$raw = $this->config->getAppValue(self::APP_ID, 'enabled_sources', '*');
		$raw = trim($raw);
		if ($raw === '' || $raw === '*') {
			return true;
		}
		$parts = array_map('trim', explode(',', strtolower($raw)));
		return in_array(strtolower($source), $parts, true);
	}

	public function getDefaultClickUrl(): string {
		$configured = trim($this->config->getAppValue(self::APP_ID, 'default_click_url', ''));
		if ($configured !== '') {
			return rtrim($configured, '/');
		}
		return rtrim($this->urlGenerator->getAbsoluteURL(''), '/');
	}

	public function verifyApiSecret(?string $provided): bool {
		if ($provided === null || $provided === '') {
			return false;
		}
		return hash_equals($this->getApiSecret(), $provided);
	}
}