// Type definitions for streamjs 1.5.0
// Project: http://winterbe.github.io/streamjs/
// Definitions by: Bence Eros <https://github.com/erosb>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped

declare class Stream<T> {
	static from <T> (elems: T[]): Stream<T>;
	static from(str: string): Stream<string>;
	static of<T>(...elems: T[]): Stream<T>;
	static range (startInclusive: number, endExclusive: number): Stream<number>;
	static rangeClosed (startInclusive: number, endInclusive: number): Stream<number>;
	static generate <T> (supplier: Stream.Supplier<T>): Stream<T>;
	static iterate<T>(seed: T, fn: Stream.Function<T, T>): Stream<T>;

	anyMatch(predicate: Stream.Predicate<T>): boolean;
	anyMatch(regexp: RegExp): boolean;
	anyMatch(sample: Stream.Sample): boolean;
	allMatch(predicate: Stream.Predicate<T>): boolean;
	allMatch(regexp: RegExp): boolean;
	allMatch(sample: Stream.Sample): boolean;
	average(): number;
	average(path: string): number;
	avg(): number;
	avg(path: string): number;
	collect(collector: Stream.Collector<T>): T;
	count(): number;
	distinct(): Stream<T>;
	dropWhile(predicate: Stream.Predicate<T>): Stream<T>;
	dropWhile(regexp: RegExp): Stream<string>;
	dropWhile(sample: Stream.Sample): Stream<T>;
	each(consumer: Stream.Consumer<T>): void;
	filter(predicate: Stream.Predicate<T>): Stream<T>;
	filter(regexp: RegExp): Stream<string>;
	filter(sample: Stream.Sample): Stream<T>;
	findAny(): Stream.Optional<T>;
	findFirst(): Stream.Optional<T>;
	forEach(consumer: Stream.Consumer<T>): void;

	groupBy(mapper: Stream.Function<T, string>): Stream.GroupingResult<T>;
	groupBy(path: string): Stream.GroupingResult<T>;
	groupingBy(mapper: Stream.Function<T, string>): Stream.GroupingResult<T>;
	groupingBy(path: string): Stream.GroupingResult<T>;
	indexBy(keyMapper: Stream.Function<T, string>, mergeFunction?: Stream.Accumulator<T>): Stream.Map<T>;
	map <U> (mapper: Stream.Function<T, U>): Stream<U>;
	max(): Stream.Optional<T>;
	max(comparator: Stream.Comparator<T>): Stream.Optional<T>;
	max(path: string): Stream.Optional<T>;
	min(): Stream.Optional<T>;
	min(comparator: Stream.Comparator<T>): Stream.Optional<T>;
	min(path: string): Stream.Optional<T>;
	noneMatch(predicate: (elem: T) => boolean): boolean;
	noneMatch(regexp: RegExp): boolean;
	flatMap <U> (mapper: Stream.Function<T, U[]>): Stream<U>;
	iterator(): Stream.Iterator<T>;
	joining(): string;
	joining(delimiter: string): string;
	joining(options: Stream.JoinOptions): string;
	join(): string;
	join(delimiter: string): string;
	join(options: Stream.JoinOptions): string;
	limit(limit: number): Stream<T>;
	partitioningBy(predicate: Stream.Predicate<T>): T[][];
	partitionBy(predicate: Stream.Predicate<T>): T[][];
	partitionBy(sample: Stream.Sample): T[][];
	partitioningBy(regexp: RegExp): T[][];
	partitionBy(regexp: RegExp): T[][];
	partitioningBy(size: number): T[][];
	partitionBy(size: number): T[][];
	partitioningBy(sample: Stream.Sample): T[][];
	peek(consumer: Stream.Consumer<T>): Stream<T>;
	reduce(identity: T, accumulator: Stream.Accumulator<T>): T;
	reduce(accumulator: Stream.Accumulator<T>): Stream.Optional<T>;
	reverse(): Stream<T>;
	size(): number;
	sorted(): Stream<T>;
	sorted(comparator: Stream.Comparator<T>): Stream<T>;
	sorted(path: string): Stream<T>;
	sort(): Stream<T>;
	sort(comparator: Stream.Comparator<T>): Stream<T>;
	sort(path: string): Stream<T>;
	shuffle(): Stream<T>;
	skip(n: number): Stream<T>;
	slice(begin: number, end: number): Stream<T>;
	sum(): number;
	sum(path: string): number;
	takeWhile(predicate: Stream.Predicate<T>): Stream<T>;
	takeWhile(regexp: RegExp): Stream<string>;
	takeWhile(sample: Stream.Sample): Stream<T>;
	toArray(): T[];
	toList(): T[];
	toMap(keyMapper: Stream.Function<T, string>, mergeFunction?: Stream.Accumulator<T>): Stream.Map<T>;
	toMap(path: string, mergeFunction?: Stream.Accumulator<T>): Stream.Map<T>;
}

declare namespace Stream {

	export interface Map<T> {
		[index: string]: T
	}


	export interface Sample {
		[index: string]: any
	}

	export interface Accumulator<T> {
		(e1: T, e2: T): T;
	}

	export interface Collector<T> {
		supplier: Supplier<T>;
		accumulator: Stream.Accumulator<T>;
		finisher: Function<T, T>;
	}

	export interface Comparator<T> {
		(e1: T, e2: T): number
	}

	export interface Consumer<T> {
		(elem: T): void;
	}

	export interface Function<T, U> {
		(elem: T): U;
	}

	export interface GroupingResult<T> {
		[index: string]: T
	}

	export interface Iterator<T> {
		next(): T;
		done: boolean;
	}

	export interface JoinOptions {
		prefix: string;
		delimiter: string;
		suffix: string;
	}

	export interface Predicate<T> {
		(elem: T): boolean;
	}

	export interface Supplier<T> {
		(): T
	}

	export class Optional<T> {
		static of<T>(elem: T): Optional<T>;
		static ofNullable<T>(elem: T): Optional<T>;

		filter(predicate: (elem: T) => boolean): Optional<T>;
		map<U>(mapper: (elem: T) => U): Optional<U>;
		flatMap<U>(mapper: (elem: T) => Stream.Optional<U>): Optional<U>;
		isPresent(): boolean;
		get(): T;
		ifPresent(consumer: (elem: T) => void): void;
		orElse(other: T): T;
		orElseGet(supplier: Stream.Supplier<T>): T;
		orElseThrow(error: any): T;
	}
}