/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
 *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
 *    Author(s):       Vincent Rouvreau
 *
 *    Copyright (C) 2016 Inria
 *
 *    Modification(s):
 *      - YYYY/MM Author: Description of the modification
 */

#ifndef INCLUDE_ALPHA_COMPLEX_INTERFACE_H_
#define INCLUDE_ALPHA_COMPLEX_INTERFACE_H_

#include "Alpha_complex_factory.h"
#include <gudhi/Alpha_complex_options.h>

#include "Simplex_tree_interface.h"

#include <iostream>
#include <vector>
#include <string>
#include <memory>  // for std::unique_ptr

namespace Gudhi {

namespace alpha_complex {

class Alpha_complex_interface {
 public:
  Alpha_complex_interface(const std::vector<std::vector<double>>& points, bool fast_version, bool exact_version)
  : points_(points),
    fast_version_(fast_version),
    exact_version_(exact_version) {
  }

  std::vector<double> get_point(int vh) {
    return alpha_ptr_->get_point(vh);
  }

  void create_simplex_tree(Simplex_tree_interface<>* simplex_tree, double max_alpha_square,
                           bool default_filtration_value) {
    if (points_.size() > 0) {
      std::size_t dimension = points_[0].size();
      if (dimension == 3 && !default_filtration_value) {
        if (fast_version_)
          alpha_ptr_ = std::make_unique<Alphacomplex_3D<Gudhi::alpha_complex::complexity::FAST>>(points_);
        else if (exact_version_)
          alpha_ptr_ = std::make_unique<Alphacomplex_3D<Gudhi::alpha_complex::complexity::EXACT>>(points_);
        else
          alpha_ptr_ = std::make_unique<Alphacomplex_3D<Gudhi::alpha_complex::complexity::SAFE>>(points_);
        if (!alpha_ptr_->create_simplex_tree(simplex_tree, max_alpha_square, default_filtration_value)) {
          // create_simplex_tree will fail if all points are on a plane - Retry with dD by setting dimension to 2
          dimension--;
          alpha_ptr_.reset();
        }
      }
      // Not ** else ** because we have to take into account if 3d fails
      if (dimension != 3 || default_filtration_value) {
        if (fast_version_) {
          alpha_ptr_ = std::make_unique<Inexact_Alphacomplex_dD>(points_, exact_version_);
        } else {
          alpha_ptr_ = std::make_unique<Exact_Alphacomplex_dD>(points_, exact_version_);
        }
        alpha_ptr_->create_simplex_tree(simplex_tree, max_alpha_square, default_filtration_value);
      }
    }
  }

 private:
  std::unique_ptr<Abstract_alpha_complex> alpha_ptr_;
  std::vector<std::vector<double>> points_;
  bool fast_version_;
  bool exact_version_;
};

}  // namespace alpha_complex

}  // namespace Gudhi

#endif  // INCLUDE_ALPHA_COMPLEX_INTERFACE_H_