<?php

namespace WP_Statistics\Service\Admin\AnonymizedUsageData;

use WP_Statistics\Service\Admin\SiteHealthInfo;
use WP_Statistics\Service\Admin\LicenseManagement\LicenseHelper;
use WP_STATISTICS\DB;
use WP_STATISTICS\Option;

class AnonymizedUsageDataProvider
{
    /**
     * Retrieves the URL for the current site where the front end is accessible.
     *
     * @return string
     */
    public static function getHomeUrl()
    {
        $url = self::getCleanDomain(home_url());

        return self::hashDomain($url);
    }

    /**
     * Get the WordPress version.
     *
     * @return string
     */
    public static function getWordPressVersion()
    {
        return get_bloginfo('version');
    }

    /**
     * Get the PHP version.
     *
     * @return string|null
     */
    public static function getPhpVersion()
    {
        if (function_exists('phpversion')) {
            $versionParts = explode('.', phpversion());
            return "$versionParts[0].$versionParts[1]";
        }

        return null;
    }

    /**
     * Get the plugin version.
     *
     * @return string
     */
    public static function getPluginVersion()
    {
        return WP_STATISTICS_VERSION;
    }

    /**
     * Get the database version.
     *
     * @return string|null
     */
    public static function getDatabaseVersion()
    {
        global $wpdb;

        if (empty($wpdb) || empty($wpdb->is_mysql)) {
            return null;
        }

        if (method_exists($wpdb, 'db_version')) {
            $version = $wpdb->db_version();
        } else {
            return null;
        }

        if (empty($version)) {
            return null;
        }

        return preg_match('/\d+\.\d+/', $version, $matches) ? $matches[0] : '';
    }

    /**
     * Get the database type.
     *
     * @return string|null
     */
    public static function getDatabaseType()
    {
        global $wpdb;

        if (empty($wpdb) || empty($wpdb->is_mysql)) {
            return null;
        }

        if (!method_exists($wpdb, 'db_server_info')) {
            return null;
        }

        $serverInfo = $wpdb->db_server_info();

        if (!$serverInfo) {
            return null;
        }

        $serverInfoLower = strtolower($serverInfo);

        if (strpos($serverInfoLower, 'mariadb') !== false) {
            return 'MariaDB';
        }

        if (strpos($serverInfoLower, 'mysql') !== false) {
            return 'MySQL';
        }

        return 'Unknown';
    }

    /**
     * Get the plugin slug.
     *
     * @return string
     */
    public static function getPluginSlug()
    {
        return basename(dirname(WP_STATISTICS_MAIN_FILE));
    }

    /**
     * Retrieves the software information of the web server.
     *
     * @return string
     */
    public static function getServerSoftware()
    {
        if (!empty($_SERVER['SERVER_SOFTWARE'])) {
            return $_SERVER['SERVER_SOFTWARE']; // @phpcs:ignore
        }

        return 'Unknown';
    }

    /**
     * Retrieves server information.
     *
     * @return array
     */
    public static function getServerInfo()
    {
        return [
            'webserver'           => self::getServerSoftware(),
            'database_type'       => self::getDatabaseType(),
            'memory_limit'        => ini_get('memory_limit') ?: 'not available',
            'max_execution_time'  => ini_get('max_execution_time') ?: 'not available',
            'post_max_size'       => ini_get('post_max_size') ?: 'not available',
            'upload_max_filesize' => ini_get('upload_max_filesize') ?: 'not available',
        ];
    }

    /**
     * Get clean domain
     *
     * @param string $url
     *
     * @return string
     */
    public static function getCleanDomain(string $url): string
    {
        if (!preg_match('/^https?:\/\//', $url)) {
            $url = 'https://' . $url; // Default to HTTPS if no scheme
        }

        $parsedUrl = wp_parse_url($url);
        $host      = preg_replace('/^www\./', '', $parsedUrl['host'] ?? '');
        $path      = $parsedUrl['path'] ?? '';

        return $host . $path;
    }

    /**
     * Hashes a URL using the SHA-256 algorithm and returns the first 40 characters.
     *
     * @param string $domain
     *
     * @return string
     */
    public static function hashDomain($domain)
    {
        return substr(hash('sha256', $domain), 0, 40);
    }

    /**
     * Get the current theme info, theme name and version.
     *
     * @return array
     */
    public static function getThemeInfo()
    {
        $themeData = wp_get_theme();

        return array(
            'slug' => $themeData->get_stylesheet(),
        );
    }

    /**
     * Get all plugins grouped into activated or not.
     *
     * @return array
     */
    public static function getAllPlugins()
    {
        $activePluginsKeys = get_option('active_plugins', array());

        $pluginFolders = array_map(function ($plugin) {
            return explode('/', $plugin)[0];
        }, $activePluginsKeys);

        return array(
            'activated_plugins' => $pluginFolders,
        );
    }

    /**
     * Retrieves plugin settings
     *
     * @return array
     */
    public static function getPluginSettings()
    {
        $siteHealthInfo = new SiteHealthInfo();

        $pluginSettings = self::processSettings($siteHealthInfo->getPluginSettings());
        $addOnSettings  = self::processSettings($siteHealthInfo->getAddOnsSettings());

        return [
            'main'   => $pluginSettings,
            'addOns' => $addOnSettings,
        ];
    }

    /**
     * Processes raw settings by extracting relevant values.
     *
     * @param array $rawSettings
     *
     * @return array
     */
    private static function processSettings(array $rawSettings): array
    {
        $processedSettings = [];

        foreach ($rawSettings as $key => $setting) {
            if ($key === 'version' || $key === 'geoIpDatabaseSize') {
                continue;
            }

            $processedSettings[$key] = $setting['debug'] ?? $setting['value'] ?? null;
        }

        return $processedSettings;
    }

    /**
     * Retrieves the timezone string.
     *
     * @return string
     */
    public static function getTimezone()
    {
        $timezone = get_option('timezone_string');

        if (!empty($timezone)) {
            return $timezone;
        }

        $gmt_offset = get_option('gmt_offset');
        return 'UTC' . ($gmt_offset >= 0 ? '+' : '') . $gmt_offset;
    }

    /**
     * Retrieves the current locale.
     *
     * @return string
     */
    public static function getLocale()
    {
        return get_locale();
    }

    /**
     * Retrieves the status, type, and associated products of all licenses.
     *
     * This method fetches all licenses using the LicenseHelper and returns an array
     * containing the 'status', 'type', and 'products' for each license.
     *
     * @return array An array of license details, where each element contains:
     *          - 'status' (string): The status of the license.
     *          - 'type' (string): The type of the license.
     *          - 'products' (array): The products associated with the license.
     */
    public static function getLicensesInfo()
    {
        $rawLicenses = LicenseHelper::getLicenses('all');
        $licenses    = [];

        foreach ($rawLicenses as $k => $v) {
            $licenses[] = [
                'status'        => $v['status'],
                'type'          => $v['type'],
                'products'      => $v['products'],
                'license_level' => $v['sku'] == 'premium' ? 'premium' : 'non-premium',
            ];
        }

        return $licenses;
    }

    /**
     * Get Number of Table Rows
     *
     * @return array
     */
    public static function getTablesStats()
    {
        $rawTableRows = DB::getTableRows();
        $tableRows    = [];
        $prefix       = DB::prefix();

        foreach ($rawTableRows as $k => $v) {
            $k             = str_replace($prefix, '', $k);
            $tableRows[$k] = $v['rows'];
        }

        return $tableRows;
    }

    /**
     * Retrieves the payload data
     *
     * @return array
     */
    public static function getPayload()
    {
        return [
            'plugin_database_version_legacy' => get_option('wp_statistics_plugin_version'),
            'plugin_database_version'        => Option::getOptionGroup('db', 'version', '0.0.0'),
            'jobs'                           => Option::getOptionGroup('jobs'),
            'dismissed_notices'              => Option::getOptionGroup('dismissed_notices'),
        ];
    }
}