<?php

/**
 * @package koko-analytics
 * @license GPL-3.0+
 * @author Danny van Kooten
 */

namespace KokoAnalytics;

class Admin
{
    public function init(): void
    {
        global $pagenow;

        add_action('init', array($this, 'maybe_run_actions'), 10, 0);
        add_action('admin_menu', array($this, 'register_menu'), 10, 0);
        add_action('koko_analytics_install_optimized_endpoint', array($this, 'install_optimized_endpoint'), 10, 0);
        add_action('koko_analytics_save_settings', array($this, 'save_settings'), 10, 0);
        add_action('koko_analytics_reset_statistics', array($this, 'reset_statistics'), 10, 0);

        // Hooks for plugins overview page
        if ($pagenow === 'plugins.php') {
            $plugin_basename = plugin_basename(KOKO_ANALYTICS_PLUGIN_FILE);
            add_filter('plugin_action_links_' . $plugin_basename, array($this, 'add_plugin_settings_link'), 10, 1);
            add_filter('plugin_row_meta', array($this, 'add_plugin_meta_links'), 10, 2);
        }
    }

    public function register_menu(): void
    {
        add_submenu_page('index.php', esc_html__('Koko Analytics', 'koko-analytics'), esc_html__('Analytics', 'koko-analytics'), 'view_koko_analytics', 'koko-analytics', array($this, 'show_page'));
    }

    public function maybe_run_actions(): void
    {
        if (isset($_GET['koko_analytics_action'])) {
            $action = $_GET['koko_analytics_action'];
        } elseif (isset($_POST['koko_analytics_action'])) {
            $action = $_POST['koko_analytics_action'];
        } else {
            return;
        }

        if (!current_user_can('manage_koko_analytics')) {
            return;
        }

        do_action('koko_analytics_' . $action);
        wp_safe_redirect(remove_query_arg('koko_analytics_action'));
        exit;
    }

    private function get_available_roles(): array
    {
        $roles = array();
        foreach (wp_roles()->roles as $key => $role) {
            $roles[$key] = $role['name'];
        }
        return $roles;
    }

    private function is_cron_event_working(): bool
    {
        // Always return true on localhost / dev-ish environments
        $site_url = get_site_url();
        $parts = parse_url($site_url);
        if (!is_array($parts) || !empty($parts['port']) || str_contains($parts['host'], 'localhost') || str_contains($parts['host'], 'local')) {
            return true;
        }

        // detect issues with WP Cron event not running
        // it should run every minute, so if it didn't run in 10 minutes there is most likely something wrong
        $next_scheduled = wp_next_scheduled('koko_analytics_aggregate_stats');
        return $next_scheduled !== false && $next_scheduled > (time() - 10 * 60);
    }

    public function show_page(): void
    {
        add_action('koko_analytics_show_settings_page', array($this, 'show_settings_page'));
        add_action('koko_analytics_show_dashboard_page', array($this, 'show_dashboard_page'));

        $tab = $_GET['tab'] ?? 'dashboard';
        do_action("koko_analytics_show_{$tab}_page");

        add_action('admin_footer_text', array($this, 'footer_text'));
    }

    public function show_dashboard_page(): void
    {
        // aggregate stats whenever this page is requested
        do_action('koko_analytics_aggregate_stats');

        if (false === $this->is_cron_event_working()) {
            echo '<div class="notice notice-warning inline koko-analytics-cron-warning is-dismissible"><p>';
            echo esc_html__('There seems to be an issue with your site\'s WP Cron configuration that prevents Koko Analytics from automatically processing your statistics.', 'koko-analytics');
            echo ' ';
            echo esc_html__('If you\'re not sure what this is about, please ask your webhost to look into this.', 'koko-analytics');
            echo '</p></div>';
        }

        // determine whether buffer file is writable
        $buffer_filename        = get_buffer_filename();
        $buffer_dirname         = dirname($buffer_filename);
        $is_buffer_dir_writable = wp_mkdir_p($buffer_dirname) && is_writable($buffer_dirname);

        if (false === $is_buffer_dir_writable) {
            echo '<div class="notice notice-warning inline is-dismissible"><p>';
            echo wp_kses(sprintf(__('Koko Analytics is unable to write to the <code>%s</code> directory. Please update the file permissions so that your web server can write to it.', 'koko-analytics'), $buffer_dirname), array('code' => array()));
            echo '</p></div>';
        }

        $dashboard = new Dashboard();
        $dashboard->show();
    }

    public function show_settings_page(): void
    {
        if (!current_user_can('manage_koko_analytics')) {
            return;
        }

        $settings           = get_settings();
        $endpoint_installer = new Endpoint_Installer();
        $using_custom_endpoint = using_custom_endpoint() && \is_file($endpoint_installer->get_file_name());
        $database_size      = $this->get_database_size();
        $user_roles   = $this->get_available_roles();
        $date_presets = (new Dashboard())->get_date_presets();

        require __DIR__ . '/views/settings-page.php';
    }

    public function footer_text(): string
    {
        // ensure upgrade text isn't showing
        add_filter('update_footer', '__return_empty_string');

        /* translators: %1$s links to the WordPress.org plugin review page, %2$s links to the admin page for creating a new post */
        return sprintf(wp_kses(__('If you enjoy using Koko Analytics, please <a href="%1$s">review the plugin on WordPress.org</a> or <a href="%2$s">write about it on your blog</a> to help out.', 'koko-analytics'), array('a' => array('href' => array()))), 'https://wordpress.org/support/view/plugin-reviews/koko-analytics?rate=5#postform', admin_url('post-new.php'));
    }



    /**
     * Add the settings link to the Plugins overview
     *
     * @param array $links
     *
     * @return array
     */
    public function add_plugin_settings_link($links): array
    {
        $settings_link = sprintf('<a href="%s">%s</a>', admin_url('index.php?page=koko-analytics&tab=settings'), esc_html__('Settings', 'koko-analytics'));
        array_unshift($links, $settings_link);
        return $links;
    }

    /**
     * Adds meta links to the plugin in the WP Admin > Plugins screen
     *
     * @param array $links
     * @param string $file
     *
     * @return array
     */
    public function add_plugin_meta_links($links, $file): array
    {
        if ($file !== plugin_basename(KOKO_ANALYTICS_PLUGIN_FILE)) {
            return $links;
        }

        $links[] = '<a href="https://www.kokoanalytics.com/kb/">' . esc_html__('Documentation', 'koko-analytics') . '</a>';
        return $links;
    }

    public function get_database_size(): string
    {
        /** @var \WPDB $wpdb */
        global $wpdb;
        $sql = $wpdb->prepare(
            '
			SELECT ROUND(SUM((DATA_LENGTH + INDEX_LENGTH) / 1024 / 1024), 2)
			FROM information_schema.TABLES
			WHERE TABLE_SCHEMA = %s AND TABLE_NAME LIKE %s',
            DB_NAME,
            $wpdb->prefix . 'koko_analytics_%'
        );
        return $wpdb->get_var($sql) ?? '??';
    }

    public function reset_statistics(): void
    {
        check_admin_referer('koko_analytics_reset_statistics');
        /** @var \WPDB $wpdb */
        global $wpdb;
        $wpdb->query("TRUNCATE {$wpdb->prefix}koko_analytics_site_stats;");
        $wpdb->query("TRUNCATE {$wpdb->prefix}koko_analytics_post_stats;");
        $wpdb->query("TRUNCATE {$wpdb->prefix}koko_analytics_referrer_stats;");
        $wpdb->query("TRUNCATE {$wpdb->prefix}koko_analytics_referrer_urls;");
        delete_option('koko_analytics_realtime_pageview_count');
    }

    public function save_settings(): void
    {
        check_admin_referer('koko_analytics_save_settings');
        $new_settings                        = $_POST['koko_analytics_settings'];
        $settings                            = get_settings();
        $settings['exclude_user_roles']      = $new_settings['exclude_user_roles'] ?? array();
        $settings['prune_data_after_months'] = abs((int) $new_settings['prune_data_after_months']);
        $settings['use_cookie']              = (int) $new_settings['use_cookie'];
        $settings['is_dashboard_public']     = (int) $new_settings['is_dashboard_public'];
        $settings['default_view']            = trim($new_settings['default_view']);
        update_option('koko_analytics_settings', $settings, true);
        wp_safe_redirect(add_query_arg(array('settings-updated' => true), wp_get_referer()));
        exit;
    }


    public function install_optimized_endpoint(): void
    {
        $installer = new Endpoint_Installer();
        $success = $installer->install();
        wp_safe_redirect(add_query_arg(array('endpoint-installed' => (int) $success), wp_get_referer()));
        exit;
    }
}