<?php
/**
 * Admin diagnostics provider.
 *
 * @package ZeroSpamForms
 */

namespace TwoOTwoCode\ZeroSpamForms\Admin\Diagnostics;

defined( 'ABSPATH' ) || exit;

use TwoOTwoCode\ZeroSpamForms\Admin\IntegrationStatusProvider;
use TwoOTwoCode\ZeroSpamForms\Commercial\BuildProfileResolver;
use TwoOTwoCode\ZeroSpamForms\Commercial\CommercialBootstrap;
use TwoOTwoCode\ZeroSpamForms\Core\Settings\SettingsRepository;
use TwoOTwoCode\ZeroSpamForms\Logging\EventStoreInterface;

/**
 * Provides safe, non-sensitive diagnostics data.
 */
final class DiagnosticsProvider {
	/**
	 * Settings repository.
	 *
	 * @var SettingsRepository
	 */
	private $settings_repository;

	/**
	 * Integration status provider.
	 *
	 * @var IntegrationStatusProvider
	 */
	private $integration_status_provider;

	/**
	 * Event store.
	 *
	 * @var EventStoreInterface|null
	 */
	private $event_store;

	/**
	 * Build profile resolver.
	 *
	 * @var BuildProfileResolver
	 */
	private $build_profile_resolver;

	/**
	 * Commercial bootstrap.
	 *
	 * @var CommercialBootstrap|null
	 */
	private $commercial_bootstrap;

	/**
	 * Constructor.
	 *
	 * @param SettingsRepository        $settings_repository         Settings repository.
	 * @param IntegrationStatusProvider $integration_status_provider Integration status provider.
	 * @param EventStoreInterface|null  $event_store                 Event store.
	 * @param BuildProfileResolver|null $build_profile_resolver      Build profile resolver.
	 * @param CommercialBootstrap|null  $commercial_bootstrap        Commercial bootstrap.
	 */
	public function __construct(
		SettingsRepository $settings_repository,
		IntegrationStatusProvider $integration_status_provider,
		?EventStoreInterface $event_store = null,
		?BuildProfileResolver $build_profile_resolver = null,
		?CommercialBootstrap $commercial_bootstrap = null
	) {
		$this->settings_repository         = $settings_repository;
		$this->integration_status_provider = $integration_status_provider;
		$this->event_store                 = $event_store;
		$this->build_profile_resolver      = $build_profile_resolver instanceof BuildProfileResolver ? $build_profile_resolver : new BuildProfileResolver();
		$this->commercial_bootstrap        = $commercial_bootstrap;
	}

	/**
	 * Get safe diagnostics data.
	 *
	 * @return array<string, mixed>
	 */
	public function get_data(): array {
		$settings             = $this->settings_repository->get_settings();
		$commercial_bootstrap = $this->get_commercial_bootstrap();
		$build_profile        = $commercial_bootstrap->get_profile();
		$data                 = array(
			'plugin_version'            => defined( 'TWOOTWOCODE_ZSF_VERSION' ) ? TWOOTWOCODE_ZSF_VERSION : '1.0.0',
			'build_profile'             => $build_profile->get_value(),
			'commercial_provider'       => $commercial_bootstrap->get_license_provider()->get_key(),
			'pro_module_count_loaded'   => $commercial_bootstrap->get_loaded_module_count(),
			'wordpress_version'         => $this->get_wordpress_version(),
			'php_version'               => PHP_VERSION,
			'protection_mode'           => (string) $settings['protection_mode'],
			'strictness'                => (string) $settings['strictness'],
			'event_logging_enabled'     => (bool) $settings['event_logging_enabled'],
			'log_allowed_events'        => (bool) $settings['log_allowed_events'],
			'event_retention_days'      => (int) $settings['event_retention_days'],
			'max_event_records'         => (int) $settings['max_event_records'],
			'stored_event_count'        => $this->get_stored_event_count(),
			'integrations'              => $this->integration_status_provider->get_statuses(),
			'vendor_autoload_available' => $this->is_vendor_autoload_available(),
			'php_extensions'            => array(
				'json' => extension_loaded( 'json' ),
			),
		);

		if ( ! $build_profile->is_free() ) {
			$data['pro_module_skeletons'] = $commercial_bootstrap->get_pro_module_metadata();
		}

		return $data;
	}

	/**
	 * Get WordPress version without exposing environment details.
	 */
	private function get_wordpress_version(): string {
		global $wp_version;

		if ( isset( $wp_version ) && is_scalar( $wp_version ) ) {
			return (string) $wp_version;
		}

		return '';
	}

	/**
	 * Check whether Composer autoload is present.
	 */
	private function is_vendor_autoload_available(): bool {
		if ( ! defined( 'TWOOTWOCODE_ZSF_PATH' ) ) {
			return false;
		}

		return file_exists( TWOOTWOCODE_ZSF_PATH . 'vendor/autoload.php' );
	}

	/**
	 * Get stored event count without exposing event data.
	 */
	private function get_stored_event_count(): int {
		if ( ! $this->event_store instanceof EventStoreInterface ) {
			return 0;
		}

		return $this->event_store->count_events();
	}

	/**
	 * Get commercial bootstrap.
	 */
	private function get_commercial_bootstrap(): CommercialBootstrap {
		if ( $this->commercial_bootstrap instanceof CommercialBootstrap ) {
			return $this->commercial_bootstrap;
		}

		$commercial_bootstrap = CommercialBootstrap::create_default( $this->build_profile_resolver );
		$commercial_bootstrap->boot();

		return $commercial_bootstrap;
	}
}