<?php
/**
 * License custom taxonomy.
 *
 * @package WP_FediStream
 */

namespace WP_FediStream\Taxonomies;

// Prevent direct file access.
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

/**
 * License taxonomy class.
 *
 * Hierarchical taxonomy for content licenses.
 */
class License extends AbstractTaxonomy {

    /**
     * Taxonomy key.
     *
     * @var string
     */
    protected string $taxonomy = 'fedistream_license';

    /**
     * Post types this taxonomy applies to.
     *
     * @var array
     */
    protected array $post_types = array(
        'fedistream_album',
        'fedistream_track',
    );

    /**
     * Register the taxonomy.
     *
     * @return void
     */
    public function register(): void {
        $labels = array(
            'name'                       => _x( 'Licenses', 'taxonomy general name', 'wp-fedistream' ),
            'singular_name'              => _x( 'License', 'taxonomy singular name', 'wp-fedistream' ),
            'search_items'               => __( 'Search Licenses', 'wp-fedistream' ),
            'popular_items'              => __( 'Popular Licenses', 'wp-fedistream' ),
            'all_items'                  => __( 'All Licenses', 'wp-fedistream' ),
            'parent_item'                => __( 'Parent License', 'wp-fedistream' ),
            'parent_item_colon'          => __( 'Parent License:', 'wp-fedistream' ),
            'edit_item'                  => __( 'Edit License', 'wp-fedistream' ),
            'view_item'                  => __( 'View License', 'wp-fedistream' ),
            'update_item'                => __( 'Update License', 'wp-fedistream' ),
            'add_new_item'               => __( 'Add New License', 'wp-fedistream' ),
            'new_item_name'              => __( 'New License Name', 'wp-fedistream' ),
            'separate_items_with_commas' => __( 'Separate licenses with commas', 'wp-fedistream' ),
            'add_or_remove_items'        => __( 'Add or remove licenses', 'wp-fedistream' ),
            'choose_from_most_used'      => __( 'Choose from the most used licenses', 'wp-fedistream' ),
            'not_found'                  => __( 'No licenses found.', 'wp-fedistream' ),
            'no_terms'                   => __( 'No licenses', 'wp-fedistream' ),
            'menu_name'                  => __( 'Licenses', 'wp-fedistream' ),
            'items_list_navigation'      => __( 'Licenses list navigation', 'wp-fedistream' ),
            'items_list'                 => __( 'Licenses list', 'wp-fedistream' ),
            'back_to_items'              => __( '&larr; Back to Licenses', 'wp-fedistream' ),
        );

        $args = array(
            'labels'             => $labels,
            'hierarchical'       => true, // Like categories.
            'public'             => true,
            'show_ui'            => true,
            'show_in_menu'       => false, // Will be added to custom menu.
            'show_admin_column'  => true,
            'show_in_nav_menus'  => false,
            'show_tagcloud'      => false,
            'show_in_rest'       => true,
            'rest_base'          => 'licenses',
            'query_var'          => true,
            'rewrite'            => array( 'slug' => 'license' ),
            'capabilities'       => array(
                'manage_terms' => 'manage_fedistream_licenses',
                'edit_terms'   => 'manage_fedistream_licenses',
                'delete_terms' => 'manage_fedistream_licenses',
                'assign_terms' => 'edit_fedistream_tracks',
            ),
        );

        register_taxonomy( $this->taxonomy, $this->post_types, $args );
    }

    /**
     * Get default licenses.
     *
     * @return array Array of licenses with descriptions.
     */
    public static function get_default_licenses(): array {
        return array(
            'All Rights Reserved' => array(
                'description' => __( 'Standard copyright. All rights reserved by the creator.', 'wp-fedistream' ),
                'children'    => array(),
            ),
            'Creative Commons'    => array(
                'description' => __( 'Creative Commons licenses for sharing and reuse.', 'wp-fedistream' ),
                'children'    => array(
                    'CC0'         => __( 'Public Domain Dedication - No rights reserved', 'wp-fedistream' ),
                    'CC BY'       => __( 'Attribution - Credit must be given', 'wp-fedistream' ),
                    'CC BY-SA'    => __( 'Attribution-ShareAlike - Credit and share under same terms', 'wp-fedistream' ),
                    'CC BY-ND'    => __( 'Attribution-NoDerivs - Credit, no modifications', 'wp-fedistream' ),
                    'CC BY-NC'    => __( 'Attribution-NonCommercial - Credit, non-commercial only', 'wp-fedistream' ),
                    'CC BY-NC-SA' => __( 'Attribution-NonCommercial-ShareAlike', 'wp-fedistream' ),
                    'CC BY-NC-ND' => __( 'Attribution-NonCommercial-NoDerivs', 'wp-fedistream' ),
                ),
            ),
            'Public Domain'       => array(
                'description' => __( 'Works in the public domain with no copyright restrictions.', 'wp-fedistream' ),
                'children'    => array(),
            ),
        );
    }

    /**
     * Install default licenses.
     *
     * @return void
     */
    public static function install_defaults(): void {
        $licenses = self::get_default_licenses();

        foreach ( $licenses as $name => $data ) {
            // Check if parent exists.
            $parent_term = term_exists( $name, 'fedistream_license' );

            if ( ! $parent_term ) {
                $parent_term = wp_insert_term(
                    $name,
                    'fedistream_license',
                    array( 'description' => $data['description'] )
                );
            }

            if ( is_wp_error( $parent_term ) ) {
                continue;
            }

            $parent_id = is_array( $parent_term ) ? $parent_term['term_id'] : $parent_term;

            // Insert children.
            foreach ( $data['children'] as $child_name => $child_desc ) {
                if ( ! term_exists( $child_name, 'fedistream_license' ) ) {
                    wp_insert_term(
                        $child_name,
                        'fedistream_license',
                        array(
                            'parent'      => (int) $parent_id,
                            'description' => $child_desc,
                        )
                    );
                }
            }
        }
    }
}