<?php
/**
 * @package ogre-sort
 * @author cleverogre
 * @copyright 2025 CleverOgre
 * @license GLP-3.0-or-later
 * @version 1.0.0
 * @since 1.0.0
 */

namespace Ogre\Sort;

use Ogre\Singleton;
use Ogre\Sort as Plugin;
use WP_Post_Type;
use WP_Taxonomy;

defined('ABSPATH') || exit;

final class Settings {
    use Singleton;

    const CAPABILITY = 'manage_options';

    protected function __construct() {
        add_filter('ogre_sort_relationships', [$this, 'register_relationships'], 10, 1);
        add_action('admin_menu', [$this, 'menu']);
        add_action('admin_init', [$this, 'init']);
    }

    public function register_relationships(array $relationships):array {
        // Post Types
        foreach ($this->get('post_types') as $post_type) {
            $relationships[] = [
                'post_type' => $post_type,
            ];
        }

        // Taxonomies
        foreach ($this->get('taxonomies') as $taxonomy) {
            $relationships[] = [
                'taxonomy' => $taxonomy,
            ];
        }

        // Taxonomy Posts
        foreach ($this->get_post_types('names') as $post_type) {
            foreach ($this->get($post_type) as $taxonomy) {
                $relationships[] = [
                    'post_type' => $post_type,
                    'taxonomy' => $taxonomy,
                ];
            }
        }

        return $relationships;
    }

    private function get(string $key = ''):array {
        $data = (array) get_option(Plugin::get_id(), []);
        if (!empty($key)) return array_key_exists($key, $data) ? (array) $data[$key] : [];
        return $data;
    }

    private function is_checked(string $name, string $value):bool {
        return is_array($option = $this->get($name)) && in_array($value, $option);
    }

    public function menu() {
        if (!current_user_can(self::CAPABILITY)) return;

        add_options_page(sprintf(Plugin::__('%s Settings'), Plugin::get_title()), Plugin::get_title(), self::CAPABILITY, Plugin::get_id(), [$this, 'page']);
    }

    private function get_post_types(string $output = 'objects'):array {
        $post_types = array_filter(
            get_post_types(
                [
                    'show_ui' => true,
                    'show_in_menu' => true,
                ],
                'objects'
            ),
            fn (WP_Post_Type $post_type):bool => $post_type->name !== 'attachment'
        );
        if ($output == 'names') {
            return wp_list_pluck($post_types, 'name');
        } else {
            return $post_types;
        }
    }

    private function get_taxonomies(string $output = 'objects'):array {
        $taxonomies = array_filter(
            get_taxonomies(
                [
                    'show_ui' => true,
                ],
                'objects'
            ),
            fn (WP_Taxonomy $taxonomy):bool => $taxonomy->name !== 'post_format'
        );
        if ($output == 'names') {
            return wp_list_pluck($taxonomies, 'name');
        } else {
            return $taxonomies;
        }
    }

    private function get_object_taxonomies(string $object_type, string $output = 'objects'):array {
        $taxonomies = array_filter(
            get_object_taxonomies($object_type, 'objects'),
            fn (WP_Taxonomy $taxonomy):bool => $taxonomy->show_ui
        );
        if ($output == 'names') {
            return wp_list_pluck($taxonomies, 'name');
        } else {
            return $taxonomies;
        }
    }

    public function init() {
        $post_types = $this->get_post_types();
        $taxonomies = $this->get_taxonomies();

        register_setting(Plugin::get_id(), Plugin::get_id());

        add_settings_section('default', Plugin::__('Sortable Objects'), [$this, 'section'], Plugin::get_id());

        if (!empty($post_types)) {
            add_settings_field(
                Plugin::get_id() . '_post_types',
                Plugin::__('Post Types'),
                [$this, 'field'],
                Plugin::get_id(),
                args: [
                    'name' => 'post_types',
                    'options' => $post_types,
                ]
            );
        }

        if (!empty($taxonomies)) {
            add_settings_field(
                Plugin::get_id() . '_taxonomies',
                Plugin::__('Taxonomies'),
                [$this, 'field'],
                Plugin::get_id(),
                args: [
                    'name' => 'taxonomies',
                    'options' => $taxonomies,
                ]
            );
        }

        if (!empty($post_types)) {
            foreach ($post_types as $post_type) {
                $object_taxonomies = $this->get_object_taxonomies($post_type->name);
                if (!empty($object_taxonomies)) {
                    add_settings_field(
                        Plugin::get_id() . '_post_type_' . $post_type->name,
                        sprintf(Plugin::__('%s Taxonomies'), $post_type->labels->singular_name),
                        [$this, 'field'],
                        Plugin::get_id(),
                        args: [
                            'name' => $post_type->name,
                            'options' => $object_taxonomies,
                        ]
                    );
                }
            }
        }
    }

    public function page() {
        if (!current_user_can(self::CAPABILITY)) return;

        // Show error/update messages
        settings_errors(Plugin::get_id());
?>
<div class="wrap">
    <h1><?php echo esc_html(get_admin_page_title()); ?></h1>
    <form action="options.php" method="post"><?php
        settings_fields(Plugin::get_id());
        do_settings_sections(Plugin::get_id());
        submit_button();
    ?></form>
</div>
<?php
    }

    public function section():void { }

    public function field(array $args):void {
        extract($args);

        echo implode('<br>', array_map(
            fn (object $option):string => sprintf(
                '<label><input type="checkbox" name="%s[%s][]" value="%s" %s>&nbsp;%s</label>',
                esc_attr(Plugin::get_id()),
                esc_attr($name),
                esc_attr($option->name),
                checked($this->is_checked($name, $option->name), display: false),
                esc_html($option->label)
            ),
            $options
        ));
    }

    public static function get_url():string {
        return admin_url('options-general.php?page=' . Plugin::get_id());
    }

}

Settings::instance();