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// -*- C++ -*-

// Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the terms

// of the GNU General Public License as published by the Free Software

// Foundation; either version 3, or (at your option) any later

// version.

// This library is distributed in the hope that it will be useful, but

// WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

// General Public License for more details.

// You should have received a copy of the GNU General Public License

// along with this library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.

// Permission to use, copy, modify, sell, and distribute this software

// is hereby granted without fee, provided that the above copyright

// notice appears in all copies, and that both that copyright notice

// and this permission notice appear in supporting documentation. None

// of the above authors, nor IBM Haifa Research Laboratories, make any

// representation about the suitability of this software for any

// purpose. It is provided "as is" without express or implied

// warranty.

/**

 * @file rand_regression_test.hpp

 * Contains a random-operation test.

 */

#ifndef PB_DS_ASSOC_RAND_REGRESSION_TEST_HPP

#define PB_DS_ASSOC_RAND_REGRESSION_TEST_HPP

#include <iostream>

#include <vector>

#include <regression/rand/assoc/container_rand_regression_test.h>

#include <io/verified_cmd_line_input.hpp>

#include <common_type/assoc/common_type.hpp>

#include <regression/basic_type.hpp>

#include <regression/common_type.hpp>

namespace __gnu_pbds

{

namespace test

{

namespace detail

{

#ifndef PB_DS_REGRESSION

#error "Must define PB_DS_REGRESSION"

#endif

  struct rand_reg_test

  {

  public:

    rand_reg_test(size_t seed, size_t n, size_t m, double tp, double ip,

                  double ep, double cp, double mp, bool d)

    : m_sd(seed), m_n(n), m_m(m), m_tp(tp), m_ip(ip), m_ep(ep), m_cp(cp),

      m_mp(mp), m_disp(d)

    { }

    template<typename Cntnr>

    void

    operator()(Cntnr)

    {

      unsigned long ul = static_cast<unsigned long>(m_sd);

      container_rand_regression_test<Cntnr> t(ul, m_n, m_n, m_tp, m_ip,

                                              m_ep, m_cp, m_mp, m_disp);

      t();

    }

  private:

    const size_t m_sd;

    const size_t m_n;

    const size_t m_m;

    const double m_tp;

    const double m_ip;

    const double m_ep;

    const double m_cp;

    const double m_mp;

    const bool m_disp;

  };

  void

  usage(const std::string& r_name);

  void

  verify_params(size_t&, size_t&, size_t&,

                double&, double&, double&, double&, double&, bool&);

} // namespace detail

  template<typename TL>

  int

  rand_regression_test(size_t iter, size_t keys, const std::string name, TL tl)

  {

    // Sane defaults.

    size_t n = iter;

    size_t m = keys;

    size_t sd = twister_rand_gen::get_time_determined_seed();

    double tp = 0.2;

    double ip = 0.6;

    double ep = 0.2;

    double cp = 0.001;

    double mp = 0.25;

    bool disp = false; // show progress

    try

      {

        detail::verify_params(sd, n, m, tp, ip, ep, cp, mp, disp);

      }

    catch (__gnu_pbds::test::illegal_input_error&)

      {

        detail::usage(name);

        return -1;

      }

    catch (...)

      {

        return -2;

      };

    // XXX RAII, constructor takes bool for display

    xml_test_rand_regression_formatter* p_fmt = NULL;

    if (disp)

      p_fmt = new xml_test_rand_regression_formatter(sd, n, m, tp, ip, ep, cp, mp);

    try

      {

        detail::rand_reg_test tst(sd, n, m, tp, ip, ep, cp, mp, disp);

        __gnu_cxx::typelist::apply(tst, tl);

      }

    catch (...)

      {

        std::cerr << "Test failed with seed " << sd << std::endl;

        if (disp)

          delete p_fmt;

        throw;

      }

    if (disp)

      delete p_fmt;

    return 0;

  }

namespace detail

{

  inline void

  usage(const std::string& name)

  {

    using namespace std;

    cerr << "usage: " << name << " <sd> <n> <m> <tp> <ip> <ep> <cp> <mp> ['t' | 'f']" <<

      endl << endl;

    cerr << "This test performs basic regression tests on various associative containers."

      "For each container, it performs a sequence of operations. At each iteration, it does "

      "the following: " << endl;

    cerr << "*  Performs an operation on the container " << endl;

    cerr << "*  Performs the same operation on an cntnr object" << endl;

    cerr << "*  Possibly compares the container to the cntnr object" << endl;

    cerr << "*  Checks that exceptions (thrown by an allocator) "

            "do not violate exception guarantees";

    cerr << endl << endl;

    cerr << "sd = seed for random-number generator; "

            "0 = time determined value" << endl;

    cerr << "n = number of iterations" << endl;

    cerr << "m = number of distinct values" << endl;

    cerr << "tp = probability that an exception will be actively thrown" << endl;

    cerr << "ip = probability that an operation will be insert" << endl;

    cerr << "ep = probability that an operation will be erase" << endl;

    cerr << "cp = probability that an operation will be clear" << endl;

    cerr << "(therefore, 1 - (ip + ep + cp) = probability of any other operation)" << endl;

    cerr << "mp = probability that the container will be compared to the cntnr object" << endl;

    cerr << "'t' or 'f' determine whether progress will be displayed" << endl;

  }

  inline void

  verify_params(size_t& r_seed, size_t& r_n,

                size_t& r_m, double& r_tp, double& r_ip, double& r_ep,

                double& r_cp, double& r_mp, bool& r_d)

  {

    verify_prob(r_tp);

    verify_prob(r_ip);

    verify_prob(r_ep);

    verify_prob(r_cp);

    verify_prob(r_mp);

    verify_prob(r_ip + r_ep + r_cp);

  }

} // namespace detail

} // namespace test

} // namespace __gnu_pbds

#endif