<?php
/**
 * REST API endpoints for the HivePress family integration.
 *
 * Three read-only endpoints (manage_options capability required):
 *
 *   GET /wpdo/v1/hivepress/status   → detection + adapter binding state
 *   GET /wpdo/v1/hivepress/score    → 8-D suitability report
 *   GET /wpdo/v1/hivepress/health   → doctor probes for each adapter
 *
 * No mutating endpoints in v3.0.0 — `migrate` / `rollback` are CLI-only
 * because they alter site-wide FSM state (Karpathy: high-blast-radius
 * actions need explicit operator intent, not a button click).
 *
 * Bound on `rest_api_init` from wp-data-optimizer.php after the existing
 * `TMDO_REST_API` registration.
 *
 * @package WP_Data_Optimizer
 * @since   3.0.0
 */

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

if ( ! class_exists( 'TMDO_HivePress_REST' ) ) {

	/**
	 * REST controller for the HivePress integration.
	 */
	final class TMDO_HivePress_REST {

		/** REST namespace. */
		public const NAMESPACE = 'wpdo/v1';

		/**
		 * Register the three GET routes.
		 */
		public function register_routes(): void {
			register_rest_route(
				self::NAMESPACE,
				'/hivepress/status',
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_status' ),
					'permission_callback' => array( $this, 'check_permission' ),
				)
			);
			register_rest_route(
				self::NAMESPACE,
				'/hivepress/score',
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_score' ),
					'permission_callback' => array( $this, 'check_permission' ),
				)
			);
			register_rest_route(
				self::NAMESPACE,
				'/hivepress/health',
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_health' ),
					'permission_callback' => array( $this, 'check_permission' ),
				)
			);
		}

		/**
		 * Capability check — operator-only (manage_options).
		 *
		 * @return bool|\WP_Error
		 */
		public function check_permission() {
			if ( ! function_exists( 'current_user_can' ) || ! current_user_can( 'manage_options' ) ) {
				return new WP_Error(
					'wpdo_hp_forbidden',
					__( 'You do not have permission to read HivePress integration data.', 'tmdo-hivepress' ),
					array( 'status' => 403 )
				);
			}
			return true;
		}

		/**
		 * GET /hivepress/status — detection + binding state.
		 */
		public function get_status() {
			$detected = class_exists( 'TMDO_HivePress_Detector' )
				? TMDO_HivePress_Detector::detect()
				: array();
			$catalog  = class_exists( 'TMDO_HivePress_Detector' )
				? TMDO_HivePress_Detector::catalog()
				: array();
			$bound    = class_exists( 'TMDO_HivePress_Bootstrap' )
				? array_keys( TMDO_HivePress_Bootstrap::adapters() )
				: array();
			$conflict = class_exists( 'TMDO_HivePress_Conflict_Guard' )
				? TMDO_HivePress_Conflict_Guard::detect_conflicts()
				: array();

			$addons = array();
			foreach ( $catalog as $slug => $name ) {
				$addons[] = array(
					'slug'     => $slug,
					'name'     => $name,
					'detected' => isset( $detected[ $slug ] ),
					'version'  => $detected[ $slug ] ?? null,
					'bound'    => in_array( $slug, $bound, true ),
				);
			}

			return new WP_REST_Response(
				array(
					'addons'    => $addons,
					'conflicts' => $conflict,
					'totals'    => array(
						'detected' => count( $detected ),
						'bound'    => count( $bound ),
						'catalog'  => count( $catalog ),
					),
				),
				200
			);
		}

		/**
		 * GET /hivepress/score — 8-D suitability report.
		 */
		public function get_score() {
			if ( ! class_exists( 'TMDO_HivePress_Suitability_Scorer' ) ) {
				return new WP_REST_Response( array( 'error' => 'scorer_unavailable' ), 503 );
			}
			return new WP_REST_Response( TMDO_HivePress_Suitability_Scorer::report(), 200 );
		}

		/**
		 * GET /hivepress/health — doctor probes for each adapter.
		 */
		public function get_health() {
			$adapters = class_exists( 'TMDO_HivePress_Bootstrap' )
				? TMDO_HivePress_Bootstrap::adapters()
				: array();

			$probes = array();
			$ok     = true;
			foreach ( $adapters as $slug => $adapter ) {
				if ( ! $adapter instanceof TMDO_HivePress_Adapter ) {
					continue;
				}
				$probe           = $adapter->doctor_check();
				$probes[ $slug ] = $probe;
				if ( empty( $probe['ok'] ) ) {
					$ok = false;
				}
			}

			return new WP_REST_Response(
				array(
					'ok'     => $ok,
					'probes' => $probes,
				),
				200
			);
		}
	}

} // end if ( ! class_exists )