import { MapWidgetModel } from 'map-widget/api';
import { TocItem } from './Item.js';
import '@arcgis/core/layers/Layer';
import '@arcgis/core/layers/support/Sublayer';
import '@arcgis/core/layers/support/WMSSublayer';
import '@arcgis/core/Map';

/**
 * A state checker can add additional messages (such as warnings)
 * to an item displayed by the TOC.
 *
 * A custom StateChecker has to be registered as `toc.StateChecker`.
 */
interface StateChecker {
    /**
     * This method is called if the viewpoint of the map changes
     * or a layer is added/loaded.
     */
    checkState(options: CheckStateOptions): CheckStateResult | Promise<CheckStateResult>;
}
/**
 * Options passed to a {@link StateChecker}.
 */
interface CheckStateOptions {
    tocItem: TocItem;
    mapWidgetModel: MapWidgetModel;
}
/**
 * Result returned by a {@link StateChecker}.
 */
type CheckStateResult = void | undefined | CheckStateMessages;
/**
 * Messages produced by a {@link StateChecker}.
 */
interface CheckStateMessages {
    /** Info messages. */
    infos?: string[];
    /** Warning messages. */
    warnings?: string[];
    /** Error messages. */
    errors?: string[];
}

export type { CheckStateMessages, CheckStateOptions, CheckStateResult, StateChecker };