// Type definitions for Postal v1.0.8
// Project: https://github.com/postaljs/postal.js
// Definitions by: Lokesh Peta <https://github.com/lokeshpeta/>, Paul Jolly <https://github.com/myitcv>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped

interface IConfiguration {
	SYSTEM_CHANNEL: string;
	DEFAULT_CHANNEL: string;
	resolver: IResolver;
}

interface IResolver {
	compare(binding: string, topic: string, headerOptions: {}): boolean;
	reset(): void;
	purge(options?: {topic?: string, binding?: string, compact?: boolean}): void;
}

interface ICallback<T> {
	(data: T, envelope: IEnvelope<T>): void
}

interface ISubscriptionDefinition<T> {
	channel: string;
	topic: string;
	callback: ICallback<T>;

	// after and before lack documentation

	constraint(predicateFn: (data: T, envelope: IEnvelope<T>) => boolean): ISubscriptionDefinition<T>;
	constraints(predicateFns: ((data: T, envelope: IEnvelope<T>) => boolean)[]): ISubscriptionDefinition<T>;
	context(theContext: any): ISubscriptionDefinition<T>;
	debounce(interval: number): ISubscriptionDefinition<T>;
	defer(): ISubscriptionDefinition<T>;
	delay(waitTime: number): ISubscriptionDefinition<T>;
	disposeAfter(maxCalls: number): ISubscriptionDefinition<T>;
	distinct(): ISubscriptionDefinition<T>;
	distinctUntilChanged(): ISubscriptionDefinition<T>;
	logError(): ISubscriptionDefinition<T>;
	once(): ISubscriptionDefinition<T>;
	throttle(interval: number): ISubscriptionDefinition<T>;
	subscribe(callback: ICallback<T>): ISubscriptionDefinition<T>;
	unsubscribe(): void;
}

interface IEnvelope<T> {
	topic: string;
	data?: T;

	/*Uses DEFAULT_CHANNEL if no channel is provided*/
	channel?: string;

	timeStamp?: string;
}


interface IChannelDefinition<T> {
	subscribe(topic: string, callback: ICallback<T>): ISubscriptionDefinition<T>;

	publish(topic: string, data?: T): void;

	channel: string;
}

interface IPostal {
	subscriptions: {};
	wireTaps: ICallback<any>[];

	addWireTap(callback: ICallback<any>): () => void;

	channel<T>(name?: string): IChannelDefinition<T>;

	getSubscribersFor(): ISubscriptionDefinition<any>[];
	getSubscribersFor(options: {channel?: string, topic?: string, context?: any}): ISubscriptionDefinition<any>[];
	getSubscribersFor(predicateFn: (sub: ISubscriptionDefinition<any>) => boolean): ISubscriptionDefinition<any>[];

	publish(envelope: IEnvelope<any>): void;

	reset(): void;

	subscribe(options: {channel?: string, topic: string, callback: ICallback<any>}): ISubscriptionDefinition<any>;
	unsubscribe(sub: ISubscriptionDefinition<any>): void;
	unsubscribeFor(): void;
	unsubscribeFor(options: {channel?: string, topic?: string, context?: any}): void;

	configuration: IConfiguration;
}

declare var postal: IPostal;

declare module "postal" {
	var postal: IPostal;
	export = postal;
}