/*
 * MIT License
 *
 * Copyright (c) 2018-2020 Ardalan Amini
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

import * as mongodb from "mongodb";
import OdinError from "../Error";
import { Event } from "./EventEmitter";
import Filter from "./Filter";
import Join from "./Join";
export declare type Callback<T = any> = (error: OdinError, result: T) => void;
export declare type Operator = "<" | "<=" | "=" | "<>" | ">=" | ">";
export declare type Order = "asc" | "desc";
export declare type Id = mongodb.ObjectId;
export declare type FilterQuery<T extends Record<string, unknown> = any> = (query: Filter<T>) => Filter<T>;
export declare type JoinQuery<T extends Record<string, unknown> = any> = (query: Join<T>) => Join<T>;
export interface GroupQueryObject<T extends Record<string, unknown> = any> {
    having: (field: string, operator: Operator | any, value?: any) => GroupQueryObject<T>;
}
export declare type GroupQuery<T extends Record<string, unknown> = any> = (query: GroupQueryObject<T>) => void;
export declare type Mapper<T extends Record<string, unknown> = any> = (item: T, index: number, items: T[]) => any;
export interface Iterator<T extends Record<string, unknown> = any> {
    hasNext: () => Promise<boolean>;
    next: () => Promise<T | undefined>;
    [Symbol.asyncIterator]: () => AsyncIterator<T>;
}
export default class DB<T extends Record<string, unknown> = any> extends Filter<T> {
    protected _connection: string;
    protected _query: mongodb.Collection;
    protected _collection: string;
    protected _pipeline: Array<{
        [key: string]: any;
    }>;
    protected _mappers: Array<Mapper<T>>;
    get pipeline(): {
        [key: string]: any;
    }[];
    constructor(_connection: string);
    protected _resetFilters(): this;
    /********************************** Event **********************************/
    protected _emit(event: Event, data: T): boolean;
    /******************************** Collection *******************************/
    static connection<T extends Record<string, unknown> = any>(connection: string): DB<T>;
    static collection<T extends Record<string, unknown> = any>(collection: string): DB<T>;
    collection(collection: string): this;
    /********************************** Extra **********************************/
    aggregate(...objects: Record<string, unknown>[] | Record<string, unknown>[][]): this;
    /*********************************** Joins **********************************/
    join(collection: string, query?: JoinQuery<T>, as?: string): this;
    /********* Mapping, Ordering, Grouping, Limit, Offset & Pagination *********/
    map(mapper: Mapper<T>): this;
    orderBy<K extends keyof T>(field: K, order?: Order): this;
    orderBy(field: string, order?: Order): this;
    orderBy(fields: {
        [field: string]: "asc" | "desc";
    }): this;
    skip(offset: number): this;
    offset(offset: number): this;
    limit(limit: number): this;
    take(limit: number): this;
    paginate(page?: number, limit?: number): this;
    /********************************* Indexes *********************************/
    indexes(): Promise<any>;
    indexes(callback: Callback<any>): void;
    index(fieldOrSpec: string | Record<string, unknown>, options?: mongodb.IndexOptions): Promise<string>;
    index(fieldOrSpec: string | Record<string, unknown>, callback: Callback<string>): void;
    index(fieldOrSpec: string | Record<string, unknown>, options: mongodb.IndexOptions, callback: Callback<string>): void;
    reIndex(): Promise<any>;
    reIndex(callback: Callback<any>): void;
    dropIndex(indexName: string, options?: mongodb.CommonOptions & {
        maxTimeMS?: number;
    }): Promise<any>;
    dropIndex(indexName: string, options: mongodb.CommonOptions & {
        maxTimeMS?: number;
    }, callback: Callback<any>): void;
    /*********************************** Read **********************************/
    private _aggregate;
    private _filtersOnly;
    count(): Promise<number>;
    count(callback: Callback<number>): void;
    exists(): Promise<boolean>;
    exists(callback: Callback<boolean>): void;
    iterate(fields?: string[]): Iterator<T>;
    get<K extends keyof T>(fields?: Array<K | string>): Promise<T[]>;
    get<K extends keyof T>(fields: Array<K | string>, callback: Callback<T[]>): void;
    get(callback: Callback<T[]>): void;
    first<K extends keyof T>(fields?: Array<K | string>): Promise<T>;
    first<K extends keyof T>(fields: Array<K | string>, callback: Callback<T>): void;
    first(callback: Callback<T>): void;
    value<K extends keyof T>(field: K): Promise<T[K]>;
    value(field: string): Promise<any>;
    value<K extends keyof T>(field: K, callback: Callback<T[K]>): void;
    value(field: string, callback: Callback<any>): void;
    pluck<K extends keyof T>(field: K): Promise<T[K]>;
    pluck(field: string): Promise<any>;
    pluck<K extends keyof T>(field: K, callback: Callback<T[K]>): void;
    pluck(field: string, callback: Callback<any>): void;
    max<K extends keyof T>(field: K): Promise<T[K]>;
    max(field: string): Promise<any>;
    max<K extends keyof T>(field: K, callback: Callback<T[K]>): void;
    max(field: string, callback: Callback<any>): void;
    min<K extends keyof T>(field: K): Promise<T[K]>;
    min(field: string): Promise<any>;
    min<K extends keyof T>(field: K, callback: Callback<T[K]>): void;
    min(field: string, callback: Callback<any>): void;
    avg<K extends keyof T>(field: K): Promise<T[K]>;
    avg(field: string): Promise<any>;
    avg<K extends keyof T>(field: K, callback: Callback<T[K]>): void;
    avg(field: string, callback: Callback<any>): void;
    /********************************** Inserts *********************************/
    protected _insertMany(items: T[]): Promise<mongodb.InsertWriteOpResult>;
    protected _insertMany(items: T[], callback: Callback<mongodb.InsertWriteOpResult>): void;
    protected _insertOne(item: T): Promise<mongodb.InsertOneWriteOpResult>;
    protected _insertOne(item: T, callback: Callback<mongodb.InsertOneWriteOpResult>): void;
    insert(item: T | T[]): Promise<number>;
    insert(item: T | T[], callback: Callback<number>): void;
    insertGetId(item: T): Promise<Id>;
    insertGetId(item: T, callback: Callback<Id>): void;
    /********************************** Updates *********************************/
    protected _update(update: Record<string, unknown>, callback?: Callback<mongodb.UpdateWriteOpResult>, soft?: {
        type: "delete" | "restore";
        field: string;
        value: Date;
    }): Promise<mongodb.UpdateWriteOpResult>;
    update(update: Partial<T>): Promise<number>;
    update(update: Partial<T>, callback: Callback<number>): void;
    increment(field: string, count?: number): Promise<number>;
    increment<K extends keyof T>(field: K, count?: number): Promise<number>;
    increment(field: string, callback: Callback<number>): void;
    increment<K extends keyof T>(field: K, callback: Callback<number>): void;
    increment(field: string, count: number, callback: Callback<number>): void;
    decrement(field: string, count?: number): Promise<number>;
    decrement<K extends keyof T>(field: K, count?: number): Promise<number>;
    decrement(field: string, callback: Callback<number>): void;
    decrement<K extends keyof T>(field: K, callback: Callback<number>): void;
    decrement(field: string, count: number, callback: Callback<number>): void;
    unset(fields: string[]): Promise<number>;
    unset<K extends keyof T>(fields: K[]): Promise<number>;
    unset(fields: string[], callback: Callback<number>): void;
    unset<K extends keyof T>(fields: K[], callback: Callback<number>): void;
    /********************************** Deletes *********************************/
    delete(): Promise<number>;
    delete(callback: Callback<number>): void;
}