import fetch from 'node-fetch'
import cc from 'cryptocompare'
import fs from 'fs-extra'
global.fetch = fetch

cc.rateLimit = function( apiKey )
{
	return fetch( `https://min-api.cryptocompare.com/stats/rate/limit${apiKey ? `?api_key=${apiKey}` : ''}` )
		.then( res=> { if( !res.ok ){ throw new Error(`${res.status} ${res.statusText}`) }else return res.json() })
		.then( body=> { if( body.Response === 'Error' ){ throw body.Message }else return body })
}

// loadByPath( "EXCHANGE/SYM/SYM/PERIOD/TS|/TS|LIMIT" ).then()
export function loadByPath( ccfs )
{
	let [ exchange, fsym, tsym, period, start, limit = 2000 ] = ccfs.split("/")
	,       [ , aggregate, tUnit ] = period.match( /(\d+)([HDWM]*)/ )
	,       loader = 'histo' + (tUnit == '' ? 'Minute' : tUnit == 'H' ? 'Hour' : 'Day')
	// calculate toTs from limit and start
	console.log( loader,  aggregate*timeFrames[tUnit] )
	return cc[loader]( fsym, tsym, { allData: true, limit: 2000, aggregate: aggregate*timeFrames[tUnit], exchange } )
}

const timeFrames = { '': 1, 'H': 1, 'D': 1, 'W': 7, 'M': 30 }
const timeFrameMinutes = { '': 1, 'H': 60, 'D': 60*24, 'W': 60*24*7, 'M': 60*24*30 }


export {
	coinList as coins
,	exchangeList as exchanges
} from 'cryptocompare'