<?php
/**
 * The support report on Setup (N-125).
 *
 * @package Careback
 */

namespace Careback;

defined( 'ABSPATH' ) || exit;

/**
 * A plain-text report for the support desk: versions, settings and the state
 * of the scheduled tasks, so a question needs fewer answers back. It holds no
 * personal data — no customer names, email addresses, order numbers or
 * comments, not the shop's contact line, recipients or email texts, no key
 * (only "set" / "not set"), not the site's address (the form's pages by their
 * path). It is built when Setup is drawn and stays on that screen: nothing is
 * sent anywhere. In English, the language of the support desk, so it is not
 * translated. An add-on adds a section of its own through
 * `careback_support_report`.
 */
class Support_Report {

	/**
	 * Filter: the sections of the report after its head, title => lines
	 * ( array $sections, Settings $settings ). A section that is not a list of
	 * lines is left out.
	 */
	const FILTER = 'careback_support_report';

	/**
	 * The report.
	 *
	 * @param Settings            $settings Plugin settings.
	 * @param Requests_Repository $requests The requests table.
	 * @param Events_Repository   $events   The security log.
	 * @return string
	 */
	public static function text( Settings $settings, Requests_Repository $requests, Events_Repository $events ) {
		unset( $requests, $events );

		$lines = array( 'Careback support report — ' . gmdate( 'j F Y, H:i' ) . ' UTC', '' );
		$lines = array_merge( $lines, self::head( $settings ) );

		/**
		 * Filters the sections of the support report: title => lines. An add-on
		 * adds its own; keep personal data out of it. See api/admin.md.
		 *
		 * @param array    $sections Title => string[].
		 * @param Settings $settings Plugin settings.
		 */
		$sections = apply_filters( self::FILTER, self::sections( $settings ), $settings ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.DynamicHooknameFound -- careback_support_report, the final prefix.

		foreach ( (array) $sections as $title => $rows ) {
			if ( ! is_array( $rows ) ) {
				continue;
			}

			$lines[] = '';
			$lines[] = (string) $title;

			foreach ( $rows as $row ) {
				if ( is_scalar( $row ) ) {
					$lines[] = '  ' . (string) $row;
				}
			}
		}

		return implode( "\n", $lines );
	}

	/**
	 * The head: Careback, what builds on it, WordPress, WooCommerce, PHP and
	 * the database, the theme, the active plugins.
	 *
	 * @param Settings $settings Plugin settings.
	 * @return string[]
	 */
	private static function head( Settings $settings ) {
		global $wpdb, $wp_version;

		if ( ! function_exists( 'get_plugins' ) ) {
			require_once ABSPATH . 'wp-admin/includes/plugin.php';
		}

		$plugins = get_plugins();
		$self    = dirname( plugin_basename( CAREBACK_FILE ) );
		$builds  = array();
		$active  = array();

		foreach ( $plugins as $file => $data ) {
			$required = array_map( 'trim', explode( ',', strtolower( isset( $data['RequiresPlugins'] ) ? (string) $data['RequiresPlugins'] : '' ) ) );
			$name     = trim( $data['Name'] . ' ' . $data['Version'] );

			if ( in_array( $self, $required, true ) ) {
				$builds[] = $name . ( is_plugin_active( $file ) ? '' : ' (inactive)' );
			}

			if ( is_plugin_active( $file ) ) {
				$active[] = $name;
			}
		}

		$storage = 'posts';
		$sync    = '';

		if ( class_exists( '\Automattic\WooCommerce\Utilities\OrderUtil' ) && \Automattic\WooCommerce\Utilities\OrderUtil::custom_orders_table_usage_is_enabled() ) {
			$storage = 'HPOS';
		}

		if ( class_exists( '\Automattic\WooCommerce\Utilities\OrderUtil' ) && method_exists( '\Automattic\WooCommerce\Utilities\OrderUtil', 'is_custom_order_tables_in_sync' ) ) {
			$sync = \Automattic\WooCommerce\Utilities\OrderUtil::is_custom_order_tables_in_sync() ? ' (compatibility mode on)' : ' (compatibility mode off)';
		}

		$woo_form = Woo_Withdrawal_Form::state( $settings );
		$server   = is_object( $wpdb ) && method_exists( $wpdb, 'db_server_info' ) ? (string) $wpdb->db_server_info() : '';
		$database = false !== stripos( $server, 'mariadb' ) && 1 === preg_match( '/(\d+\.\d+\.\d+)/', $server, $m ) ? 'MariaDB ' . $m[1] : 'MySQL ' . ( is_object( $wpdb ) ? (string) $wpdb->db_version() : '' );
		$theme    = wp_get_theme();

		return array(
			'Careback ' . CAREBACK_VERSION . ' (database ' . (string) get_option( 'careback_db_version', 'not set' ) . ')',
			'Plugins that build on Careback: ' . ( $builds ? implode( ', ', $builds ) : 'none' ),
			'WordPress ' . $wp_version . ', ' . ( is_multisite() ? 'multisite' : 'single site' ) . ', language ' . get_locale() . ', time zone ' . wp_timezone_string(),
			'WooCommerce ' . ( function_exists( 'WC' ) ? WC()->version : 'not active' ) . ', order storage: ' . $storage . $sync,
			'WooCommerce\'s own withdrawal form: ' . ( 'none' === $woo_form ? 'not in this WooCommerce' : ( 'off' === $woo_form ? 'off' : 'on' ) ) . ( 'kept' === $woo_form ? ' (kept beside Careback\'s)' : '' ),
			'PHP ' . PHP_VERSION . ', memory limit ' . ( defined( 'WP_MEMORY_LIMIT' ) ? WP_MEMORY_LIMIT : (string) ini_get( 'memory_limit' ) ) . '; database ' . $database,
			'Theme: ' . $theme->get( 'Name' ) . ' ' . $theme->get( 'Version' ) . ( function_exists( 'wp_is_block_theme' ) && wp_is_block_theme() ? ' (block theme)' : ' (classic theme)' ),
			'Active plugins (' . count( $active ) . '): ' . implode( ', ', $active ),
		);
	}

	/**
	 * Careback's own sections: the form, the requests, the schedule, the emails,
	 * the official texts and their versions.
	 *
	 * @param Settings $settings Plugin settings.
	 * @return array<string,string[]>
	 */
	private static function sections( Settings $settings ) {
		global $wpdb;

		$pages = array();

		foreach ( Setup_Link::form_pages() as $post ) {
			$path    = (string) wp_parse_url( (string) get_permalink( $post ), PHP_URL_PATH );
			$pages[] = ( '' !== $path ? $path : '/' ) . ' (' . ( 'publish' === $post->post_status ? 'published' : $post->post_status ) . ')';
		}

		$on     = Routes::withdrawal_offered( $settings );
		$policy = (int) $settings->get( 'returns_policy_page', 0 );
		$recip  = array_filter( array_map( 'trim', explode( ',', (string) $settings->get( 'admin_recipients', '' ) ) ), 'is_email' );
		$flag   = static function ( $value ) {
			return empty( $value ) ? 'off' : 'on';
		};
		$own    = static function ( $key ) use ( $settings ) {
			return '' === trim( (string) $settings->get( $key, '' ) ) ? 'default' : 'custom';
		};

		$form = array(
			'Switched on: ' . ( empty( $settings->get( 'portal_enabled' ) ) ? 'no' : 'yes' ) . '; on pages: ' . ( $pages ? implode( ', ', $pages ) : 'none' ),
			'Statutory withdrawal: ' . ( $on ? 'on, ' . (int) $settings->get( 'statutory_window_days', 14 ) . ' days' : 'off' ) . '; voluntary return: ' . (int) $settings->get( 'return_window_days', 30 ) . ' days, reason ' . Reasons::mode( 'return', $settings ),
			'Periods start: status "' . Periods::delivered_status( $settings ) . '" + ' . Periods::buffer_days( $settings ) . ' days buffer',
			'Returns policy page: ' . ( $policy > 0 ? 'set (' . (string) get_post_status( $policy ) . ')' : 'not set' ) . '; consent: ' . $flag( $settings->get( 'policy_consent', 0 ) ),
			'Legal wording: link text ' . $own( 'legal_link_text' ) . ', button ' . $own( 'legal_confirm_text' ),
			'Fields: reason ' . $flag( $settings->get( 'field_reason' ) ) . ', comment ' . $flag( $settings->get( 'field_comment' ) ) . ', quantity ' . $flag( $settings->get( 'field_quantity' ) ) . '; item details: ' . $flag( $settings->get( 'variation_display' ) ),
			'Fallback contact line: ' . ( '' === trim( (string) $settings->get( 'fallback_contact', '' ) ) ? 'not set' : 'set' ),
			'Team email recipients: ' . count( $recip ),
			'Bot protection: timing ' . ( empty( $settings->get( 'enable_time_token' ) ) ? 'off' : (int) $settings->get( 'min_submit_seconds' ) . '–' . (int) $settings->get( 'max_submit_seconds' ) . ' s' ),
			'Throttling: ' . (int) $settings->get( 'lookup_max_attempts' ) . ' lookups per ' . (int) $settings->get( 'lookup_window_minutes' ) . ' min; auto-block after ' . (int) $settings->get( 'ban_threshold' ) . ', for ' . (int) $settings->get( 'ban_minutes' ) . ' min',
			'Tracking page: ' . $flag( $settings->get( 'track_enabled' ) ),
		);

		$by_type = array();
		$total   = 0;

		if ( Database::ready() ) {
			$table = Database::table( 'requests' );

			$counts = array();

			foreach ( (array) $wpdb->get_results( $wpdb->prepare( 'SELECT type, COUNT(*) AS n FROM %i GROUP BY type', $table ), ARRAY_A ) as $row ) { // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching -- the plugin's own table, read live for the report.
				$counts[ (string) $row['type'] ] = (int) $row['n'];
				$total                          += (int) $row['n'];
			}

			// In the order of the routes, then any other type stored.
			foreach ( array_merge( array_intersect( Routes::keys(), array_keys( $counts ) ), array_diff( array_keys( $counts ), Routes::keys() ) ) as $type ) {
				$by_type[] = $type . ' ' . $counts[ $type ];
			}

			$open     = ( new Requests_Repository() )->count( Statuses::open() );
			$events   = (int) $wpdb->get_var( $wpdb->prepare( 'SELECT COUNT(*) FROM %i', Database::table( 'events' ) ) ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching -- the plugin's own table, read live for the report.
			$requests = array(
				$total . ' in total' . ( $by_type ? ': ' . implode( ', ', $by_type ) : '' ) . '; open ' . (int) $open,
				'Security log: ' . $events . ' entries, kept ' . (int) $settings->get( 'retention_events_days', 90 ) . ' days',
			);
		} else {
			$requests = array( 'Tables not set up on this site yet' );
		}

		$next    = wp_next_scheduled( Retention::HOOK );
		$overdue = 0;

		foreach ( (array) _get_cron_array() as $timestamp => $hooks ) {
			if ( (int) $timestamp < time() - 10 * MINUTE_IN_SECONDS ) {
				foreach ( (array) $hooks as $events ) {
					$overdue += count( (array) $events );
				}
			}
		}

		$schedule = array(
			Retention::HOOK . ': ' . ( $next ? 'next ' . gmdate( 'Y-m-d H:i', (int) $next ) . ' UTC' : 'not scheduled' ),
			'WP-Cron: ' . ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ? 'off (DISABLE_WP_CRON)' : 'on' ),
			'Overdue tasks of all plugins: ' . $overdue,
		);

		$emails = array();

		foreach ( array_keys( Emails::OWN ) as $class ) {
			$email = Emails::get( $class );

			// The name WooCommerce → Emails shows, its id beside it.
			if ( $email ) {
				$emails[] = $email->get_title() . ' (' . $email->id . '): ' . ( $email->is_enabled() ? 'on' : 'off' );
			}
		}

		return array(
			'Form'            => $form,
			'Requests'        => $requests,
			'Scheduled tasks' => $schedule,
			'Emails'          => $emails ? $emails : array( 'not loaded' ),
			'Official texts'  => Official_Texts::report_lines( $settings ),
		);
	}
}