// Arguments: Doubles, Doubles, Doubles
#include <stan/math/prim.hpp>

using stan::math::var;
using std::numeric_limits;
using std::vector;

class AgradCdfDoubleExponential : public AgradCdfTest {
 public:
  void valid_values(vector<vector<double> >& parameters, vector<double>& cdf) {
    vector<double> param(3);

    param[0] = 1.0;  // y
    param[1] = 1.0;  // mu
    param[2] = 1.0;  // sigma
    parameters.push_back(param);
    cdf.push_back(0.5);  // expected cdf

    param[0] = 2.0;  // y
    param[1] = 1.0;  // mu
    param[2] = 1.0;  // sigma
    parameters.push_back(param);
    cdf.push_back(
        0.8160602794142788392022381149192695662770944344841160827460815991512692521275500983214263628270401781);  // expected cdf

    param[0] = -3.0;  // y
    param[1] = 2.0;   // mu
    param[2] = 1.0;   // sigma
    parameters.push_back(param);
    cdf.push_back(
        0.003368973499542733548318024211574212124424792513677542715152765786341761257802031140724569422104180774);  // expected cdf

    param[0] = 1.0;  // y
    param[1] = 0.0;  // mu
    param[2] = 2.0;  // sigma
    parameters.push_back(param);
    cdf.push_back(
        0.6967346701436832881981002325044097732790409322564065221585539206324717402931257880006761942460052720);  // expected cdf

    param[0] = 1.9;  // y
    param[1] = 2.3;  // mu
    param[2] = 0.5;  // sigma
    parameters.push_back(param);
    cdf.push_back(0.224664482058610795715051192507781);  // expected cdf

    param[0] = 1.9;   // y
    param[1] = 2.3;   // mu
    param[2] = 0.25;  // sigma
    parameters.push_back(param);
    cdf.push_back(0.10094825899732770424258963382167488);  // expected cdf
  }

  void invalid_values(vector<size_t>& index, vector<double>& value) {
    // y

    // mu
    index.push_back(1U);
    value.push_back(numeric_limits<double>::infinity());

    index.push_back(1U);
    value.push_back(-numeric_limits<double>::infinity());

    // sigma
    index.push_back(2U);
    value.push_back(0.0);

    index.push_back(2U);
    value.push_back(-1.0);

    index.push_back(2U);
    value.push_back(numeric_limits<double>::infinity());

    index.push_back(2U);
    value.push_back(-numeric_limits<double>::infinity());
  }

  bool has_lower_bound() { return false; }

  bool has_upper_bound() { return false; }

  template <typename T_y, typename T_loc, typename T_scale, typename T3,
            typename T4, typename T5>
  stan::return_type_t<T_y, T_loc, T_scale> cdf(const T_y& y, const T_loc& mu,
                                               const T_scale& sigma, const T3&,
                                               const T4&, const T5&) {
    return stan::math::double_exponential_cdf(y, mu, sigma);
  }

  template <typename T_y, typename T_loc, typename T_scale, typename T3,
            typename T4, typename T5>
  stan::return_type_t<T_y, T_loc, T_scale> cdf_function(const T_y& y,
                                                        const T_loc& mu,
                                                        const T_scale& sigma,
                                                        const T3&, const T4&,
                                                        const T5&) {
    return stan::math::double_exponential_cdf(y, mu, sigma);
  }
};
