// Ceres Solver - A fast non-linear least squares minimizer
// Copyright 2014 Google Inc. All rights reserved.
// http://code.google.com/p/ceres-solver/
//
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// modification, are permitted provided that the following conditions are met:
//
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//   this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
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// Author: sameeragarwal@google.com (Sameer Agarwal)

#include <algorithm>
#include "ceres/summary_utils.h"
#include "ceres/program.h"
#include "ceres/solver.h"

namespace ceres {
namespace internal {

void SetSummaryFinalCost(Solver::Summary* summary) {
  summary->final_cost = summary->initial_cost;
  // We need the loop here, instead of just looking at the last
  // iteration because the minimizer maybe making non-monotonic steps.
  for (int i = 0; i < summary->iterations.size(); ++i) {
    const IterationSummary& iteration_summary = summary->iterations[i];
    summary->final_cost = min(iteration_summary.cost, summary->final_cost);
  }
}

void SummarizeGivenProgram(const Program& program, Solver::Summary* summary) {
  summary->num_parameter_blocks     = program.NumParameterBlocks();
  summary->num_parameters           = program.NumParameters();
  summary->num_effective_parameters = program.NumEffectiveParameters();
  summary->num_residual_blocks      = program.NumResidualBlocks();
  summary->num_residuals            = program.NumResiduals();
}

void SummarizeReducedProgram(const Program& program, Solver::Summary* summary) {
  summary->num_parameter_blocks_reduced     = program.NumParameterBlocks();
  summary->num_parameters_reduced           = program.NumParameters();
  summary->num_effective_parameters_reduced = program.NumEffectiveParameters();
  summary->num_residual_blocks_reduced      = program.NumResidualBlocks();
  summary->num_residuals_reduced            = program.NumResiduals();
}

}  // namespace internal
}  // namespace ceres