import { Backtester } from "../business/Backtester";
import { ParametersCombination } from "../models/ParametersCombination";
import { PermutationUtils } from "../utils/PermutationUtils";
import { Configuration } from "../models/Configuration";
import { Candlestick } from "binance-api-client";

export class BacktesterFacade {

    public static async test( configuration: Configuration, candlesHistory: Candlestick[] ): Promise< [ ParametersCombination, number ] > {

        let bestMatch: [ ParametersCombination, number ] = [ null, Number.MIN_VALUE ];

        let parametersCombinations: ParametersCombination[] =
            PermutationUtils.getParameterCombinationsFromConfiguration( configuration );
        for( let parametersCombination of parametersCombinations ) {

            Backtester.initialize( configuration );
            let resultingGain: number = await Backtester.test( parametersCombination, candlesHistory );
            if( resultingGain > bestMatch[ 1 ] ) {
                bestMatch = [ parametersCombination, resultingGain ];
            }

        }

        return bestMatch;

    }

}