<?php

namespace AKSRT\WidgetSystem;

defined('ABSPATH') || exit;

/**
 * Lazy, immutable registry for all modern widgets.
 */
final class WidgetRegistry {
	/** @var array<string, WidgetDefinition>|null */
	private static ?array $definitions = null;

	/** @return array<string, WidgetDefinition> */
	public static function all(): array {
		if (self::$definitions === null) {
			self::$definitions = [];
			foreach (WidgetCatalog::definitions() as $raw) {
				$definition = new WidgetDefinition($raw);
				if (isset(self::$definitions[$definition->slug()])) {
					throw new \LogicException('Duplicate widget slug: ' . $definition->slug());
				}
				self::$definitions[$definition->slug()] = $definition;
			}
		}
		return self::$definitions;
	}

	public static function get(string $slug): ?WidgetDefinition {
		return self::all()[$slug] ?? null;
	}

	public static function get_by_id_base(string $id_base): ?WidgetDefinition {
		$prefix = 'aksrt_widget_';
		if (!str_starts_with($id_base, $prefix)) {
			return null;
		}
		return self::get(substr($id_base, strlen($prefix)));
	}

	public static function count(): int {
		return count(self::all());
	}

	public static function reset(): void {
		self::$definitions = null;
	}
}