<?php
/**
 * Taxonomy service — the `workflow_flag` taxonomy used for conditional routing
 * (policy/legal/compliance) and escalation (urgent).
 *
 * @package OST\EditorialWorkflow
 */

namespace OST\EditorialWorkflow;

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

/**
 * Registers the workflow flag taxonomy.
 */
class Taxonomy {

	const TAXONOMY = 'workflow_flag';

	/**
	 * Config service (to know which post types to attach to).
	 *
	 * @var Config
	 */
	private $config;

	/**
	 * Constructor.
	 *
	 * @param Config $config Config service.
	 */
	public function __construct( Config $config ) {
		$this->config = $config;
	}

	/**
	 * Hook registration into init.
	 *
	 * @return void
	 */
	public function register_hooks() {
		add_action( 'init', array( $this, 'register' ) );
	}

	/**
	 * Register the taxonomy against every managed post type.
	 *
	 * @return void
	 */
	public function register() {
		$post_types = $this->config->managed_post_types();
		if ( empty( $post_types ) ) {
			$post_types = array( 'post', 'page' );
		}

		register_taxonomy(
			self::TAXONOMY,
			$post_types,
			array(
				'labels'             => array(
					'name'          => __( 'Workflow Flags', 'ost-editorial-workflow' ),
					'singular_name' => __( 'Workflow Flag', 'ost-editorial-workflow' ),
					'menu_name'     => __( 'Workflow Flags', 'ost-editorial-workflow' ),
				),
				'public'             => false,
				'publicly_queryable' => false,
				// Hierarchical => a checkbox list of the predefined flags (not free-text tags).
				'hierarchical'       => true,
				'show_ui'            => true,
				'show_in_menu'       => false,
				'show_in_rest'       => true,
				'show_admin_column'  => true,
				'rewrite'            => false,
			)
		);
	}

	/**
	 * Insert the default flag terms (idempotent). Called on activation.
	 *
	 * @return void
	 */
	public function insert_default_terms() {
		$terms = array(
			'policy'     => __( 'Policy', 'ost-editorial-workflow' ),
			'legal'      => __( 'Legal', 'ost-editorial-workflow' ),
			'compliance' => __( 'Compliance', 'ost-editorial-workflow' ),
			'urgent'     => __( 'Urgent', 'ost-editorial-workflow' ),
		);
		foreach ( $terms as $slug => $label ) {
			if ( ! term_exists( $slug, self::TAXONOMY ) ) {
				wp_insert_term( $label, self::TAXONOMY, array( 'slug' => $slug ) );
			}
		}
	}
}