// Copyright 2015. All rights reserved.
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// Author: ryan.latture@gmail.com (Ryan Latture)

#ifndef THREEDBEAMFEA_OPTIONS_H
#define THREEDBEAMFEA_OPTIONS_H

#include <string>

namespace fea {
/**
 * @brief Provides a method for customizing the finite element analysis.
 */
struct Options {
  /**
   * @brief Default constructor
   * @details This tries to set up reasonable defaults for analysis. It is
   * recommended that the user read and overwrite the defaults based on the
   * information desired from the analysis.
   */
  Options() {
    epsilon = 1e-14;

    csv_precision = 14;
    csv_delimiter = ",";

    save_nodal_displacements = false;
    save_nodal_forces = false;
    save_tie_forces = false;
    verbose = false;
    save_report = false;

    nodal_displacements_filename = "nodal_displacements.csv";
    nodal_forces_filename = "nodal_forces.csv";
    tie_forces_filename = "tie_forces.csv";
    report_filename = "report.txt";
  }

  /**
   * Values of forces and nodal displacements which have a magnitude less than
   * `epsilon` will be rounded to 0.0. Default = `1e-14`. This is a simple way
   * to deal with machine precision when doing calculations.
   */
  double epsilon;

  /**
   * Number of decimal places to use when saving nodal forces and displacements
   * if either `save_nodal_displacements` or `save_nodal_forces` is set to
   * `true`. Default = 14.
   */
  unsigned int csv_precision;

  /**
   * Delimiter to use when saving nodal forces and displacements if either
   * `save_nodal_displacements` or `save_nodal_forces` is set to `true`. Default
   * = ",".
   */
  std::string csv_delimiter;

  /**
   * Specifies if the nodal displacements should be saved to a file. Default =
   * `false`. If `true` the nodal displacements will be saved to the file
   * indicated by `nodal_displacements_filename`.
   */
  bool save_nodal_displacements;

  /**
   * Specifies if the nodal forces should be saved to a file. Default = `false`.
   * If `true` the nodal forces will be saved to the file indicated by
   * `nodal_forces_filename`.
   */
  bool save_nodal_forces;

  /**
   * Specifies if the elemental forces should be saved to a file. Default =
   * `false`. If `true` the elemental forces will be saved to the file indicated
   * by `elemental_forces_filename`.
   */
  bool save_elemental_forces;

  /**
   * Specifies if the forces associated with tie elements should be saved to a
   * file. Default = `false`. If `true` the tie forces will be saved to the file
   * indicated by `tie_forces_filename`.
   */
  bool save_tie_forces;

  /**
   * Specifies if progress of the analysis should be written to std::cout.
   * Default = `false`. If `true` information on current step and time taken per
   * step will be reported.
   */
  bool verbose;

  /**
   * Specifies if a text file should be written detailing information on the
   * analysis. Default = `false`. If `true` the a report will be saved to the
   * file indicated by `report_filename`.
   */
  bool save_report;

  /**
   * File name to save the nodal displacements to when `save_nodal_displacements
   * == true`.
   */
  std::string nodal_displacements_filename;

  /**
   * File name to save the nodal forces to when `save_nodal_forces == true`.
   */
  std::string nodal_forces_filename;

  /**
   * File name to save the nodal forces to when `save_nodal_forces == true`.
   */
  std::string elemental_forces_filename;

  /**
   * File name to save the nodal forces to when `save_tie_forces == true`.
   */
  std::string tie_forces_filename;

  /**
   * File name to save the nodal forces to when `save_report == true`.
   */
  std::string report_filename;
};

} // namespace fea

#endif // THREEDBEAMFEA_OPTIONS_H