/**
 * Copyright 2022 Gravwell, Inc. All rights reserved.
 *
 * Contact: [legal@gravwell.io](mailto:legal@gravwell.io)
 *
 * This software may be modified and distributed under the terms of the MIT
 * license. See the LICENSE file for details.
 */

import { isArray, isNull, isString, isUndefined } from 'lodash';
import { isRawElementFilterOperation, RawElementFilterOperation } from './element-filter-operation';

// Named ExploreResult in Go
export interface RawDataExplorerEntry {
	Elements: Array<RawDataExplorerElement> | null;
	Tag: string;
}

export const isRawDataExplorerEntry = (v: unknown): v is RawDataExplorerEntry => {
	try {
		const entry = v as RawDataExplorerEntry;
		const elementsOK =
			isNull(entry.Elements) || (isArray(entry.Elements) && entry.Elements.every(isRawDataExplorerElement));
		return elementsOK && isString(entry.Tag);
	} catch {
		return false;
	}
};

// Named ExploreElement in Go
/**
 * An Element is an item which has been extracted from an entry using the data
 * exploration system.
 */
export interface RawDataExplorerElement {
	Module?: string | undefined; // Might be an empty string
	Name: string;
	Path: string; // Might be an empty string
	Args?: string | undefined;
	Value: string | number | boolean | null;
	SubElements?: Array<RawDataExplorerElement>;
	Filters: Array<RawElementFilterOperation> | null;
}

const isRawDataExplorerElement = (v: unknown): v is RawDataExplorerElement => {
	try {
		const c = v as RawDataExplorerElement;
		const subElementsOK = isUndefined(c.SubElements)
			? true
			: isArray(c.SubElements) && c.SubElements.every(isRawDataExplorerElement);
		return (
			isString(c.Name) &&
			isString(c.Path) &&
			(isString(c.Args) || isUndefined(c.Args)) &&
			!isUndefined(c.Value) &&
			subElementsOK &&
			isArray(c.Filters) &&
			c.Filters.every(isRawElementFilterOperation)
		);
	} catch {
		return false;
	}
};