/*
 * Copyright © 2006-2022 Dynare Team
 *
 * This file is part of Dynare.
 *
 * Dynare 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 of the License, or
 * (at your option) any later version.
 *
 * Dynare 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 Dynare.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "Statement.hh"
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wold-style-cast"
#include <boost/xpressive/xpressive.hpp>
#pragma GCC diagnostic pop
#include <utility>

void
Statement::checkPass([[maybe_unused]] ModFileStructure &mod_file_struct,
                     [[maybe_unused]] WarningConsolidation &warnings)
{
}

void
Statement::computingPass([[maybe_unused]] const ModFileStructure &mod_file_struct)
{
}

NativeStatement::NativeStatement(string native_statement_arg) :
  native_statement{move(native_statement_arg)}
{
}

void
NativeStatement::writeOutput(ostream &output, [[maybe_unused]] const string &basename,
                             [[maybe_unused]] bool minimal_workspace) const
{
  using namespace boost::xpressive;
  string date_regex = R"((-?\d+([YyAa]|[Mm]([1-9]|1[0-2])|[Qq][1-4]|[SsHh][1-2])))";
  sregex regex_lookbehind = sregex::compile(R"((?<!\$|\d|[a-zA-Z_]|-|'))" + date_regex);
  sregex regex_dollar = sregex::compile(R"((\$))" + date_regex);

  string ns = regex_replace(native_statement, regex_lookbehind, "dates('$&')");
  ns = regex_replace(ns, regex_dollar, "$2"); //replace $DATE with DATE
  output << ns << endl;
}

void
NativeStatement::writeJsonOutput(ostream &output) const
{
  output << R"({"statementName": "native")"
         << R"(, "string": ")";

  // A similar code is in VerbatimStatement::writeJsonOutput()
  for (auto ch : native_statement)
    switch (ch)
      {
      case '\b':
	output << R"(\b)";
	break;

      case '\f':
	output << R"(\f)";
	break;

      case '\n':
	output << R"(\n)";
	break;

      case '\r':
	output << R"(\r)";
	break;

      case '\t':
	output << R"(\t)";
	break;

      case '"':
	output << R"(\")";
	break;

      case '\\':
	output << R"(\\)";
        break;

      default:
	output << ch;
	break;
      }

  output << R"("})";
}

VerbatimStatement::VerbatimStatement(string verbatim_statement_arg) :
  verbatim_statement{move(verbatim_statement_arg)}
{
}

void
VerbatimStatement::writeOutput(ostream &output, [[maybe_unused]] const string &basename,
                               [[maybe_unused]] bool minimal_workspace) const
{
  output << verbatim_statement << endl;
}

void
VerbatimStatement::writeJsonOutput(ostream &output) const
{
  output << R"({"statementName": "verbatim")"
         << R"(, "string": ")";

  // A similar code is in NativeStatement::writeJsonOutput()
  for (auto ch : verbatim_statement)
    switch (ch)
      {
      case '\b':
	output << R"(\b)";
	break;

      case '\f':
	output << R"(\f)";
	break;

      case '\n':
	output << R"(\n)";
	break;

      case '\r':
	output << R"(\r)";
	break;

      case '\t':
	output << R"(\t)";
	break;

      case '"':
	output << R"(\")";
	break;

      case '\\':
	output << R"(\\)";
        break;

      default:
	output << ch;
	break;
      }

  output << R"("})";
}

void
OptionsList::writeOutput(ostream &output) const
{
  writeOutputCommon(output, "options_");
}

void
OptionsList::writeOutput(ostream &output, const string &option_group) const
{
  // Initialize option_group as an empty struct iff the field does not exist!
  if (size_t idx = option_group.find_last_of(".");
      idx != string::npos)
    {
      output << "if ~isfield(" << option_group.substr(0, idx) << ",'" << option_group.substr(idx+1) << "')" << endl;
      output << "    " << option_group << " = struct();" << endl;
      output << "end" << endl;
    }
  else
    output << option_group << " = struct();" << endl;

  writeOutputCommon(output, option_group);
}

void
OptionsList::writeOutputCommon(ostream &output, const string &option_group) const
{
  for (const auto & [name, val] : num_options)
    output << option_group << "." << name << " = " << val << ";" << endl;

  for (const auto & [name, vals] : paired_num_options)
    output << option_group << "." << name << " = [" << vals.first << "; "
           << vals.second << "];" << endl;

  for (const auto & [name, val] : string_options)
    output << option_group << "." << name << " = '" << val << "';" << endl;

  for (const auto & [name, val] : date_options)
    output << option_group << "." << name << " = " << val << ";" << endl;

  for (const auto & [name, list] : symbol_list_options)
    list.writeOutput(option_group + "." + name, output);

  for (const auto & [name, vals] : vector_int_options)
    {
      output << option_group << "." << name << " = ";
      if (vals.size() > 1)
        {
          output << "[";
          for (int viit : vals)
            output << viit << ";";
          output << "];" << endl;
        }
      else
        output << vals.front() << ";" << endl;
    }

  for (const auto & [name, vals] : vector_str_options)
    {
      output << option_group << "." << name << " = ";
      if (vals.size() > 1)
        {
          output << "{";
          for (const auto &viit : vals)
            output << "'" << viit << "';";
          output << "};" << endl;
        }
      else
        output << vals.front() << ";" << endl;
    }

  /* vector_cellstr_options should ideally be merged into vector_str_options
     only difference is treatment of vals.size==1, where vector_str_options
     does not add quotes and curly brackets, i.e. allows for type conversion of
     '2' into the number 2
  */

  for (const auto & [name, vals] : vector_cellstr_options)
    {
      output << option_group << "." << name << " = {";
      for (const auto &viit : vals)
        output << "'" << viit << "';";
      output << "};" << endl;
    }

  /* For historical reason, those vectors are output as row vectors (contrary
     to vectors of integers which are output as column vectors) */
  for (const auto &[name, vals] : vector_value_options)
    {
      output << option_group << "." << name << " = [";
      for (const auto &viit : vals)
        output << viit << ",";
      output << "];" << endl;
    }

  // Same remark as for vectors of (floating point) values
  for (const auto &[name, vec_vals] : vector_of_vector_value_options)
    {
      output << option_group << "." << name << " = {";
      for (const auto &vals : vec_vals)
        {
          output << "[";
          for (const auto &viit : vals)
            output << viit << ",";
          output << "], ";
        }
      output << "};" << endl;
    }
}

void
OptionsList::writeJsonOutput(ostream &output) const
{
  if (getNumberOfOptions() == 0)
    return;

  bool opt_written{false};

  output << R"("options": {)";
  for (const auto &[name, val] : num_options)
    {
      if (opt_written)
        output << ", ";
      output << R"(")" << name << R"(": )" << val;
      opt_written = true;
    }

  for (const auto &[name, vals] : paired_num_options)
    {
      if (opt_written)
        output << ", ";
      output << R"(")" << name << R"(": [)" << vals.first << ", " << vals.second << "]";
      opt_written = true;
    }

  for (const auto &[name, val] : string_options)
    {
      if (opt_written)
        output << ", ";
      output << R"(")" << name << R"(": ")" << val << R"(")";
      opt_written = true;
    }

  for (const auto &[name, val] : date_options)
    {
      if (opt_written)
        output << ", ";
      output << R"(")" << name << R"(": ")" << val << R"(")";
      opt_written = true;
    }

  for (const auto &[name, vals] : symbol_list_options)
    {
      if (opt_written)
        output << ", ";
      output << R"(")" << name << R"(": {)";
      vals.writeJsonOutput(output);
      output << "}";
      opt_written = true;
    }

  for (const auto &[name, vals] : vector_int_options)
    {
      if (opt_written)
        output << ", ";
      output << R"(")" << name << R"(": [)";
      for (bool printed_something{false};
           int val : vals)
        {
          if (exchange(printed_something, true))
            output << ", ";
          output << val;
        }
      output << "]";
      opt_written = true;
    }

  for (const auto &[name, vals] : vector_str_options)
    {
      if (opt_written)
        output << ", ";
      output << R"(")" << name << R"(": [)";
      for (bool printed_something{false};
           const auto &val : vals)
        {
          if (exchange(printed_something, true))
            output << ", ";
          output << R"(")" << val << R"(")";
        }
      output << "]";
      opt_written = true;
    }

  for (const auto &[name, vals] : vector_cellstr_options)
    {
      if (opt_written)
        output << ", ";
      output << R"(")" << name << R"(": [)";
      for (bool printed_something{false};
           const auto &val : vals)
        {
          if (exchange(printed_something, true))
            output << ", ";
          output << R"(")" << val << R"(")";
        }
      output << "]";
      opt_written = true;
    }

  for (const auto &[name, vals] : vector_value_options)
    {
      if (opt_written)
        output << ", ";
      output << R"(")" << name << R"(": [)";
      for (bool printed_something{false};
           const auto &val : vals)
        {
          if (exchange(printed_something, true))
            output << ", ";
          output << val;
        }
      output << "]";
      opt_written = true;
    }

  for (const auto &[name, vec_vals] : vector_of_vector_value_options)
    {
      if (opt_written)
        output << ", ";
      output << R"(")" << name << R"(": [)";
      for (bool printed_something{false};
           const auto &vals : vec_vals)
        {
          if (exchange(printed_something, true))
            output << ", ";
          output << "[";
          for (bool printed_something2{false};
               const auto &val : vals)
            {
              if (exchange(printed_something2, true))
                output << ", ";
              output << val;
            }
          output << "]";
        }
      output << "]";
      opt_written = true;
    }

  output << "}";
}

void
OptionsList::clear()
{
  num_options.clear();
  paired_num_options.clear();
  string_options.clear();
  date_options.clear();
  symbol_list_options.clear();
  vector_int_options.clear();
  vector_str_options.clear();
  vector_cellstr_options.clear();
  vector_value_options.clear();
  vector_of_vector_value_options.clear();
}

int
OptionsList::getNumberOfOptions() const
{
  return num_options.size()
    + paired_num_options.size()
    + string_options.size()
    + date_options.size()
    + symbol_list_options.size()
    + vector_int_options.size()
    + vector_str_options.size()
    + vector_cellstr_options.size()
    + vector_value_options.size()
    + vector_of_vector_value_options.size();
}