<?php

namespace KTH;

use Symfony\Component\Yaml\Yaml;
use Symfony\Component\Yaml\Exception\ParseException;

class App {

    private $config;

    /**
     * Check if the cache file exists.
     *
     * @return bool True if the cache file exists, false otherwise.
     */


    public function cacheExist(): bool {
        if (file_exists('../cache/index.html')) {
            return true;
        }
        return false;
    }

    /**
     * Create a menu from an array of services.
     *
     * @param array $services An array of service data.
     *
     * @return array An array containing the unique types and locations of the services.
     */
    public function makeMenu(array $services): array {
        $menu = [];
        foreach ($services as $service) {
            if(!is_array($service)){
                return $menu;
            }
            $menu['type'][] = $service['type'];
            $menu['location'][] = $service['location'];
        }
        $menu['type'] = array_unique($menu['type'], SORT_LOCALE_STRING);
        $menu['location'] = array_unique($menu['location'], SORT_LOCALE_STRING);
        return $menu;
    }

    /**
     * Return the path to an image file or a default image if the file does not exist.
     *
     * @param string $file The name of the image file.
     * @param string $type The type of image (e.g., 'favicons', 'screenshots').
     *
     * @return string The path to the image file or a default image.
     */
    public function returnImg(string|null $file, string $type): string {
        $defaultFile = 'assets/icons/missing.svg';
        $permitType = ['favicons', 'big_favicons', 'screenshots', 'thumbs'];

        if (empty($file) || is_null($file)) {
            return $defaultFile;
        }

        if (!in_array($type, $permitType)) {
            return $defaultFile;
        }

        if (filter_var($file, FILTER_VALIDATE_URL)) {
            return $file;
        }

        if (file_exists('imgs/' . $type . '/' . $file . '.webp')) {
            return 'imgs/' . $type . '/' . $file . '.webp';
        }

        return $defaultFile;
    }

    /**
     * Check if the current IP address is permitted to bypass authentication.
     *
     * @param array|null $permitIP An array of permitted IP addresses or null if all IP addresses are permitted.
     *
     * @return bool True if the current IP address is permitted to bypass authentication, false otherwise.
     */
    public function canByPassAuth(array|null $permitIP): bool {
        if ($permitIP === null) {
            return true;
        }
        if (in_array($_SERVER['REMOTE_ADDR'], $permitIP)) {
            return true;
        }
        return false;
    }

    /**
     * Save the user configuration settings.
     *
     * @return void
     */
    function saveUserConfig(): void {
        $colorScheme = htmlspecialchars($_POST['colorScheme']);
        $view = htmlspecialchars($_POST['view']);
        $title = htmlspecialchars($_POST['title']);
        $visibility = htmlspecialchars($_POST['visibility']);
        $desc = htmlspecialchars($_POST['desc']);

        if (isset($_POST['reimport'])) {
            if (htmlspecialchars($_POST['reimport']) == '1') {
                $_SESSION['reimport'] = true;
            }
        }

        $userConfig = [
            'colorScheme' => $colorScheme,
            'view' => $view,
            'title' => $title,
            'visibility' => $visibility,
            'desc' => $desc
        ];

        $config = Yaml::dump($userConfig);
        file_put_contents('../data/config.yaml', $config);
        $this->clearCache();
    }

    /**
     * Save services list
     *
     * @return void
     */
    function saveServices(): array {
        try {
            $value = Yaml::parse(trim($_POST['services'], 2));
        } catch (ParseException $exception) {
            return ['status' => 'error', 'message' => $exception->getMessage(), 'content' => $_POST['services']];
        }

        file_put_contents('../data/services.yaml', $_POST['services']);
        $this->clearCache();
        return ['status' => 'success', 'message' => ''];
    }


    /**
     * Get the configuration settings.
     *
     * @param array $defConfig The default configuration settings.
     *
     * @return array The configuration settings.
     */
    public function getConfig(array $defConfig): array {
        if (file_exists('../data/config.yaml')) {
            $userConfig = Yaml::parseFile('../data/config.yaml');
            if (empty($userConfig)) {
                return $defConfig;
            }
            $config = array_merge($defConfig, $userConfig);
            $this->config = $config;
            return $config;
        }
        $this->config = $defConfig;
        return $defConfig;
    }

    /**
     * Clear the cache file.
     *
     * @return void
     */
    public function clearCache(): void {
        if (file_exists('../cache/index.html')) {
            unlink('../cache/index.html');
        }
    }

    /**
     * Initialize the data directories.
     *
     * @return void
     */
    static function initializeDataDir(): void {
        if (!is_dir(('../data/assets/css'))) {
            mkdir('../data/assets/css', 0775, true);
        }
        if (!is_dir(('../data/assets/icons'))) {
            mkdir('../data/assets/icons', 0775, true);
        }
        if (!is_dir(('../data/assets/js'))) {
            mkdir('../data/assets/js', 0775, true);
        }
        if (!is_dir(('../data/imgs/favicons'))) {
            mkdir('../data/imgs/favicons', 0775, true);
        }
        if (!is_dir(('../data/imgs/screenshots'))) {
            mkdir('../data/imgs/screenshots', 0775, true);
        }
    }

    public function getServices() {
        if (file_exists('../data/services.yaml')) {
            $services = Yaml::parseFile('../data/services.yaml');
        } else {
            $services = [
                0 => [
                    'title' => 'Wikipedia',
                    'screenshot' => 'wikipedia.png',
                    'favicon' => 'wikipedia.png',
                    'link' => 'https://en.wikipedia.org/wiki/Dashboard_(computing)',
                    'appHome' => 'https://www.mediawiki.org/wiki/MediaWiki',
                    'location' => 'web',
                    'desc' => 'Wikipedia, the free encyclopedia',
                    'type' => 'webapp'
                ],
                [
                    'title' => 'Awesome-Selfhosted',
                    'screenshot' => 'Awesome-Selfhosted.png',
                    'favicon' => 'Awesome-Selfhosted.ico',
                    'link' => 'https://awesome-selfhosted.net/',
                    'appHome' => 'https://www.mediawiki.org/wiki/MediaWiki',
                    'location' => 'web',
                    'desc' => 'A list of Free Software network services and web applications which can be hosted on your own servers',
                    'type' => 'webapp'
                ]
            ];
        }

        return $services;
    }
}