#include <iostream>
#include <fstream>
#include <algorithm>
#include <string>

#include "helpers.h"
#include "argh.h"

int main(int argc, const char* argv[])
{
    argh::parser args;
    args.add_params({ "l", "low" });
    args.add_params({ "h", "high" });
    args.add_params({ "s", "signal" });
    args.add_params({ "o", "output" });

    args.parse(argc, argv);

    unsigned low, high, s;
    std::string output;

    args({"l", "low"}, 12)   >> low;
    args({"h", "high"}, 26)  >> high;
    args({"s", "signal"}, 9) >> s;
    args({"o", "output"}, "./intersections.csv") >> output;

    double price;
    std::cin >> price;

    unsigned max = std::max({ low, high, s });
    buffer<double> prices(max, price);
    buffer<double> macd(max);
    buffer<double> signal(max);

    std::cout << "no,price,macd,signal,delta" << std::endl;

    std::ofstream intersections(output);
    intersections << "no,x,action" << std::endl;
    int i = 0, j = 0;
    do {
        prices.add(price);
        double value = ema<double>(prices.begin(), prices.begin() + low) - ema<double>(prices.begin(), prices.begin() + high);
        macd.add(value);
        signal.add(ema<double>(macd.begin(), macd.begin() + s));

        if (sign(macd[0] - signal[0]) != sign(macd[1] - signal[1])) {
            // zamiana
            double x1 = i+1, x2 = i;
            double y1 = macd[1], y2 = macd[0];
            double y3 = signal[1], y4 = signal[0];

            double a = abs(y2 - y1), b = abs(y4 - y3);
            double x = (a * x2 + b * x1) / (a + b);
            intersections << ++j << "," << x << "," << (macd[0] - signal[0] > 0 ? "buy" : "sell") << std::endl;
        }

        std::cout << ++i << "," << prices[0] << "," << macd[0] << "," << signal[0] << "," << prices[0] - prices[1] << std::endl; 
    } while(std::cin >> price);
}