import { Collection, OmitInternalVertexKeys, Vertex } from "./vertex.js";
import { EdgeBase, EdgeValueKey, EdgeWrapper } from "./edges.js";
import { AllKeys } from "./util.js";
import { ExpandKey, RemoveNeverValues, SelectKey } from "./common.js";
import { VertexQuery } from "./vertex-query/index.js";

//#region src/core/interfaces/vertices/util/keys-of.d.ts
/**
 * Returns all possible keys of a vertex, including nested keys in dot-notation for edges.
 */
type AllKeysOf<V extends Vertex<Collection>> = keyof { [K in keyof RemoveNeverValues<OmitInternalVertexKeys<V>> as NonNullable<V[K]> extends EdgeWrapper<any, infer E extends EdgeBase<any, any> | null | undefined> ? EdgeValueKey extends keyof NonNullable<E> ? NonNullable<E>[EdgeValueKey] extends Vertex<Collection> ? K : AllKeys<NonNullable<E>[EdgeValueKey]> extends (infer S extends string) ? K | `${K}.${S}` : never : never : K]-?: true };
/**
 * combines keys from 'select' and 'expand' and defaults to all keys if neither is specified
 */
type _CombinePaths<V extends Vertex<any>, Q extends VertexQuery<V>> = ExpandKey extends keyof Q ? SelectKey extends keyof Q ? NonNullable<Q[SelectKey]>[number] | keyof Q[ExpandKey] : keyof Q[ExpandKey] : SelectKey extends keyof Q ? NonNullable<Q[SelectKey]>[number] : keyof OmitInternalVertexKeys<V>;
/**
 * Replaces all top-level keys with the full paths of their children, if they have any.
 */
type _FlattenKeys<Keys, AvailableKeys> = Keys extends (infer K extends string) ? [Extract<AvailableKeys, `${K}.${string}`>] extends [never] ? K : Extract<AvailableKeys, `${K}.${string}`> : never;
/**
 * Given a vertex type and expand/select paths, returns the corresponding fully flattened (using dot-notation) keys.
 */
type KeysOf<V extends Vertex<any>, Q extends VertexQuery<V>> = _FlattenKeys<_CombinePaths<V, Q>, AllKeysOf<V>>;
//#endregion
export { AllKeysOf, KeysOf };
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