<?php
/**
 * Integracion con Salud del sitio de WordPress.
 *
 * @package ChatBotWeb
 */

namespace ChatBotWeb;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Publica el estado del plugin en Herramientas → Salud del sitio.
 *
 * Se usa la pantalla del core en vez de inventar un panel propio por dos razones: es
 * donde cualquiera que sepa de WordPress va a buscar, y trae el boton "Copiar la
 * informacion del sitio", asi que pedirle los datos a un cliente es una sola frase.
 */
final class Diagnostics {

	/**
	 * Instancia única.
	 *
	 * @var Diagnostics|null
	 */
	private static ?Diagnostics $instance = null;

	/**
	 * Devuelve la instancia única.
	 *
	 * @return Diagnostics
	 */
	public static function instance(): Diagnostics {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Registra los hooks de Salud del sitio.
	 *
	 * @return void
	 */
	public function boot(): void {
		add_filter( 'debug_information', array( $this, 'debug_information' ) );
		add_filter( 'site_status_tests', array( $this, 'site_status_tests' ) );
	}

	/**
	 * Agrega la sección de BotPar a Salud del sitio → Información.
	 *
	 * @param array $info Secciones existentes.
	 * @return array
	 */
	public function debug_information( $info ): array {
		$info = is_array( $info ) ? $info : array();
		$opts = wp_parse_args( get_option( CHAT_BOT_WEB_OPTION, array() ), Settings::defaults() );

		$lines = preg_split( '/\r\n|\r|\n/', (string) $opts['excluded_paths'] );
		$paths = is_array( $lines ) ? array_filter( array_map( 'trim', $lines ) ) : array();

		$info['botpar'] = array(
			'label'       => __( 'BotPar', 'botpar' ),
			'description' => __( 'Status of the AI assistant. If you contact support, copy this information.', 'botpar' ),
			'fields'      => array(
				'version'        => array(
					'label' => __( 'Plugin version', 'botpar' ),
					'value' => CHAT_BOT_WEB_VERSION,
				),
				'public_key'     => array(
					'label'   => __( 'Public key', 'botpar' ),
					'value'   => $this->mask_key( (string) $opts['public_key'] ),
					// La public key no es secreta, pero no hace falta que viaje en cada
					// copiado de la información del sitio.
					'private' => true,
				),
				'api_base'       => array(
					'label' => __( 'Backend', 'botpar' ),
					'value' => Injector::api_base( $opts ),
				),
				'site_origin'    => array(
					'label' => __( 'Domain validated against the allowlist', 'botpar' ),
					'value' => Settings::site_origin(),
				),
				'identify_user'  => array(
					'label' => __( 'Auto-identify logged-in users', 'botpar' ),
					'value' => empty( $opts['identify_user'] ) ? __( 'No', 'botpar' ) : __( 'Yes', 'botpar' ),
				),
				'excluded_paths' => array(
					'label' => __( 'Page exclusion rules', 'botpar' ),
					'value' => (string) count( $paths ),
				),
				'debug_mode'     => array(
					'label' => __( 'Debug mode', 'botpar' ),
					'value' => Logger::enabled() ? __( 'Enabled', 'botpar' ) : __( 'Disabled', 'botpar' ),
				),
				'last_test'      => array(
					'label' => __( 'Last connection test', 'botpar' ),
					'value' => $this->last_test_summary(),
				),
			),
		);

		return $info;
	}

	/**
	 * Registra la prueba de conexión en Salud del sitio → Estado.
	 *
	 * @param array $tests Pruebas existentes.
	 * @return array
	 */
	public function site_status_tests( $tests ): array {
		$tests = is_array( $tests ) ? $tests : array();

		// Prueba directa y no asíncrona: lee el resultado guardado en vez de salir a la
		// red. Si el backend estuviera caído, una prueba en vivo dejaría colgada la
		// pantalla de Salud del sitio hasta el timeout. El botón de los ajustes es el
		// que refresca el dato.
		$tests['direct']['botpar_connection'] = array(
			'label' => __( 'BotPar connection', 'botpar' ),
			'test'  => array( $this, 'run_status_test' ),
		);

		return $tests;
	}

	/**
	 * Resultado de la prueba para Salud del sitio.
	 *
	 * @return array
	 */
	public function run_status_test(): array {
		$opts   = wp_parse_args( get_option( CHAT_BOT_WEB_OPTION, array() ), Settings::defaults() );
		$link   = admin_url( 'options-general.php?page=botpar' );
		$result = array(
			'label'       => __( 'The BotPar widget is connected', 'botpar' ),
			'status'      => 'good',
			'badge'       => array(
				'label' => __( 'BotPar', 'botpar' ),
				'color' => 'blue',
			),
			'description' => '',
			'actions'     => sprintf(
				'<p><a href="%1$s">%2$s</a></p>',
				esc_url( $link ),
				esc_html__( 'Go to BotPar settings', 'botpar' )
			),
			'test'        => 'botpar_connection',
		);

		if ( empty( $opts['public_key'] ) ) {
			$result['status']      = 'recommended';
			$result['label']       = __( 'BotPar is not configured yet', 'botpar' );
			$result['description'] = '<p>' . esc_html__( 'The widget public key has not been entered. Until it is, the widget does not appear on the site.', 'botpar' ) . '</p>';
			return $result;
		}

		$last = get_transient( 'chat_bot_web_test_result' );
		if ( ! is_array( $last ) || empty( $last['status'] ) ) {
			$result['status']      = 'recommended';
			$result['label']       = __( 'The BotPar connection has not been checked', 'botpar' );
			$result['description'] = '<p>' . esc_html__( 'Go to the BotPar settings and click "Test connection" to find out whether the widget will appear.', 'botpar' ) . '</p>';
			return $result;
		}

		$message = isset( $last['message'] ) ? (string) $last['message'] : '';

		if ( 'ok' !== $last['status'] ) {
			$result['status'] = 'critical';
			$result['label']  = __( 'The BotPar widget is not loading', 'botpar' );
		}

		$result['description'] = '<p>' . esc_html( $message ) . '</p><p>' . esc_html( $this->last_test_summary() ) . '</p>';

		return $result;
	}

	/**
	 * Resumen legible del último test guardado.
	 *
	 * @return string
	 */
	private function last_test_summary(): string {
		$last = get_transient( 'chat_bot_web_test_result' );
		if ( ! is_array( $last ) || empty( $last['status'] ) ) {
			return __( 'Never tested', 'botpar' );
		}

		$labels = array(
			'ok'      => __( 'Connected', 'botpar' ),
			'warning' => __( 'Domain not allowed', 'botpar' ),
			'error'   => __( 'Error', 'botpar' ),
		);
		$status = isset( $labels[ $last['status'] ] ) ? $labels[ $last['status'] ] : $labels['error'];

		if ( empty( $last['checked_at'] ) ) {
			return $status;
		}

		return sprintf(
			/* translators: 1: connection status, 2: date and time of the check. */
			__( '%1$s (%2$s)', 'botpar' ),
			$status,
			(string) wp_date( get_option( 'date_format' ) . ' ' . get_option( 'time_format' ), (int) $last['checked_at'] )
		);
	}

	/**
	 * Muestra solo el principio de la key, suficiente para identificar cuál es.
	 *
	 * @param string $key Public key completa.
	 * @return string
	 */
	private function mask_key( string $key ): string {
		if ( '' === $key ) {
			return __( 'Not configured', 'botpar' );
		}
		if ( strlen( $key ) <= 16 ) {
			return $key;
		}
		return substr( $key, 0, 16 ) . '…';
	}
}