import { BaseClient } from './client'

export interface Candle {
	open: number
	close: number
	high: number
	low: number
	volume: number
	time: number
}

export interface CandleBySymbol {
	[symbol: string]: Candle
}

/**
 * Both init and next should be syncrhonous to keep backtesting as fast as possible.
 * Init is called once when the strategy is first initialized. This should be used to
 * setup your strategy with a chart analyzer, add event listeners, etc...
 *
 * Any asyncrounous operations (such as fetching data using the client) should be done
 * in init or an event listener. Responses should also be handled in an event listener.
 * All fetched data should be stored in the EntityManager repos for usage in syncronous
 * calls (Client.getAccounts, Client.getCandles, etc...). Client fetch operations are
 * syncrounous in the backtest client only, so treat them as async operations.
 */
export interface Strategy {
	init(client: BaseClient): void
	next(candleBySymbol: CandleBySymbol): void
}