import { ReturnTypeFuncValue } from '@nestjs/graphql';
import { Class, Filter, Query } from '@ptc-org/nestjs-query-core';
import { ConnectionCursorType } from '../cursor.scalar';
import { PagingStrategies } from '../query';
interface BaseConnectionOptions {
    enableTotalCount?: boolean;
    connectionName?: string;
    disableKeySetPagination?: boolean;
    enableFetchAllWithNegative?: boolean;
}
export interface CursorConnectionOptions extends BaseConnectionOptions {
    pagingStrategy?: PagingStrategies.CURSOR;
}
export interface OffsetConnectionOptions extends BaseConnectionOptions {
    pagingStrategy?: PagingStrategies.OFFSET;
}
export interface ArrayConnectionOptions extends BaseConnectionOptions {
    pagingStrategy?: PagingStrategies.NONE;
}
export type ConnectionOptions = CursorConnectionOptions | OffsetConnectionOptions | ArrayConnectionOptions;
export interface EdgeType<DTO> {
    node: DTO;
    cursor: ConnectionCursorType;
}
export interface PageInfoType {
    hasNextPage: boolean;
    hasPreviousPage: boolean;
    startCursor?: ConnectionCursorType | undefined;
    endCursor?: ConnectionCursorType | undefined;
}
export type CursorConnectionType<DTO> = {
    pageInfo: PageInfoType;
    edges: EdgeType<DTO>[];
    totalCount?: Promise<number>;
};
export interface OffsetPageInfoType {
    hasNextPage: boolean;
    hasPreviousPage: boolean;
}
export type OffsetConnectionType<DTO> = {
    pageInfo: OffsetPageInfoType;
    totalCount?: Promise<number>;
    nodes: DTO[];
};
export type ArrayConnectionType<DTO> = DTO[];
export type ConnectionType<DTO> = OffsetConnectionType<DTO> | CursorConnectionType<DTO> | ArrayConnectionType<DTO>;
export type InferConnectionTypeFromStrategy<DTO, S extends PagingStrategies> = S extends PagingStrategies.NONE ? ArrayConnectionType<DTO> : S extends PagingStrategies.OFFSET ? OffsetConnectionType<DTO> : S extends PagingStrategies.CURSOR ? CursorConnectionType<DTO> : never;
export type QueryMany<DTO, Q extends Query<DTO>> = (query: Q) => Promise<DTO[]>;
export type Count<DTO> = (filter: Filter<DTO>) => Promise<number>;
export type CountFn = () => Promise<number>;
export type PagerResult = {
    totalCount: CountFn;
};
export interface Pager<DTO, R extends PagerResult> {
    page<Q extends Query<DTO>>(queryMany: QueryMany<DTO, Q>, query: Q, count: Count<DTO>): Promise<R>;
}
export interface StaticConnectionType<DTO, S extends PagingStrategies> extends Class<InferConnectionTypeFromStrategy<DTO, S>> {
    resolveType: ReturnTypeFuncValue;
    createFromPromise<Q extends Query<DTO>>(queryMany: QueryMany<DTO, Q>, query: Q, count?: Count<DTO>): Promise<InferConnectionTypeFromStrategy<DTO, S>>;
}
export {};