<?php
/**
 * System health card data collector.
 *
 * @package BRVerify
 */

declare(strict_types=1);

namespace BRVerify\Admin;

use BRVerify\Adapters\LocalAdapter;
use BRVerify\Jobs\Job_Repository;
use BRVerify\Jobs\Scheduler;
use BRVerify\Support\Settings;

/**
 * Health — PHP / WP / Zip / sodium / disk / tables / cron signals.
 */
final class Health {

	/**
	 * Collect rows for the admin health card.
	 *
	 * @return list<array{label:string,value:string,status:string}>
	 */
	public function collect(): array {
		$rows   = array();
		$php_ok = version_compare( PHP_VERSION, '7.4.0', '>=' );
		$rows[] = array(
			'label'  => __( 'PHP version', '007aj-backup-restore-verifier' ),
			'value'  => PHP_VERSION . ( $php_ok ? '' : ' ' . __( '(7.4+ required)', '007aj-backup-restore-verifier' ) ),
			'status' => $php_ok ? 'ok' : 'fail',
		);

		$wp_ok  = version_compare( get_bloginfo( 'version' ), '6.3', '>=' );
		$rows[] = array(
			'label'  => __( 'WordPress version', '007aj-backup-restore-verifier' ),
			'value'  => get_bloginfo( 'version' ) . ( $wp_ok ? '' : ' ' . __( '(6.3+ required)', '007aj-backup-restore-verifier' ) ),
			'status' => $wp_ok ? 'ok' : 'fail',
		);

		$zip    = class_exists( 'ZipArchive' );
		$rows[] = array(
			'label'  => __( 'ZipArchive', '007aj-backup-restore-verifier' ),
			'value'  => $zip ? __( 'Available', '007aj-backup-restore-verifier' ) : __( 'Missing', '007aj-backup-restore-verifier' ),
			'status' => $zip ? 'ok' : 'warn',
		);

		$sodium = function_exists( 'sodium_crypto_secretbox' );
		$rows[] = array(
			'label'  => __( 'Libsodium', '007aj-backup-restore-verifier' ),
			'value'  => $sodium ? __( 'Available', '007aj-backup-restore-verifier' ) : __( 'Not available', '007aj-backup-restore-verifier' ),
			'status' => $sodium ? 'ok' : 'warn',
		);

		$disk   = $this->disk_free_label();
		$rows[] = array(
			'label'  => __( 'Available disk space (content dir)', '007aj-backup-restore-verifier' ),
			'value'  => $disk['label'],
			'status' => $disk['status'],
		);

		$local  = new LocalAdapter();
		$rows[] = array(
			'label'  => __( 'Local working directory', '007aj-backup-restore-verifier' ),
			'value'  => $local->is_configured()
				? $local->working_dir()
				: __( 'Not writable', '007aj-backup-restore-verifier' ),
			'status' => $local->is_configured() ? 'ok' : 'fail',
		);

		$server = isset( $_SERVER['SERVER_SOFTWARE'] ) ? sanitize_text_field( wp_unslash( $_SERVER['SERVER_SOFTWARE'] ) ) : '';
		if ( false !== stripos( $server, 'nginx' ) ) {
			$rows[] = array(
				'label'  => __( 'Web server protection', '007aj-backup-restore-verifier' ),
				'value'  => __( 'Nginx ignores .htaccess. Add "location ~* /uploads/brverify-working/ { deny all; }" to your server block so backup files cannot be downloaded directly.', '007aj-backup-restore-verifier' ),
				'status' => 'warn',
			);
		}

		$repo      = new Job_Repository();
		$tables_ok = $repo->tables_exist();
		$rows[]    = array(
			'label'  => __( 'Job tables', '007aj-backup-restore-verifier' ),
			'value'  => $tables_ok
				? sprintf(
					/* translators: %d: job row count */
					__( 'Present (%d jobs)', '007aj-backup-restore-verifier' ),
					$repo->count()
				)
				: __( 'Missing — re-activate plugin', '007aj-backup-restore-verifier' ),
			'status' => $tables_ok ? 'ok' : 'fail',
		);

		$cron_disabled = ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON );
		$rows[]        = array(
			'label'  => __( 'WP-Cron', '007aj-backup-restore-verifier' ),
			'value'  => $cron_disabled
				? __( 'DISABLE_WP_CRON is true — use system cron to hit wp-cron.php', '007aj-backup-restore-verifier' )
				: __( 'Enabled (spawn)', '007aj-backup-restore-verifier' ),
			'status' => $cron_disabled ? 'warn' : 'ok',
		);

		$interval    = Settings::schedule_interval();
		$labels      = Settings::interval_labels();
		$sched       = new Scheduler();
		$sched_label = $labels[ $interval ] ?? $interval;
		if ( Settings::INTERVAL_DISABLED !== $interval ) {
			$sched_label .= ' — ' . sprintf(
				/* translators: %s: next run datetime */
				__( 'next %s', '007aj-backup-restore-verifier' ),
				$sched->next_run_label()
			);
		}
		$rows[] = array(
			'label'  => __( 'Backup schedule', '007aj-backup-restore-verifier' ),
			'value'  => $sched_label,
			'status' => Settings::INTERVAL_DISABLED === $interval ? 'warn' : 'ok',
		);

		$multisite = is_multisite();
		$rows[]    = array(
			'label'  => __( 'Multisite', '007aj-backup-restore-verifier' ),
			'value'  => $multisite
				? __( 'Multisite is not supported — jobs will refuse', '007aj-backup-restore-verifier' )
				: __( 'Single site', '007aj-backup-restore-verifier' ),
			'status' => $multisite ? 'warn' : 'ok',
		);

		return $rows;
	}

	/**
	 * Free disk space where backups are stored (uploads directory).
	 *
	 * @return array{label:string,status:string}
	 */
	private function disk_free_label(): array {
		$path = dirname( \BRVerify\Support\Working_Dir::root() );
		$free = @disk_free_space( $path ); // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged

		if ( false === $free ) {
			return array(
				'label'  => __( 'Unknown', '007aj-backup-restore-verifier' ),
				'status' => 'warn',
			);
		}

		$label  = size_format( (int) $free, 2 );
		$status = $free < 100 * MB_IN_BYTES ? 'warn' : 'ok';

		return array(
			'label'  => $label,
			'status' => $status,
		);
	}
}