#ifndef RSTPM2_GSM_H
#define RSTPM2_GSM_H

#include <RcppArmadillo.h>
#include <splines.h>

namespace rstpm2 {

  enum link_types {PH};

  class gsm_term {
  public:
    ns ns1;
    arma::vec gamma, x;
  };
  
  class gsm {
  public:
    link_types link_type;
    double tmin, tmax, target;
    arma::vec etap;
    std::vector<gsm_term> terms;
    int index;
    bool log_time;
    double link(double S);
    double linkinv(double eta);
    gsm(); // default constructor
    gsm(SEXP args);
    gsm(Rcpp::List list);
    double eta(double y);
    double operator()(double y);
    double rand(double tentry=0.0, int index = 0);
  };

}

#endif /* gsm.h */