/**
 * Orthanc - A Lightweight, RESTful DICOM Store
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2023 Osimis S.A., Belgium
 * Copyright (C) 2024-2026 Orthanc Team SRL, Belgium
 * Copyright (C) 2021-2026 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program 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
 * Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 **/


#include "BackgroundColor.h"

#include "ImageToolbox.h"

#include <iostream>

#include <OrthancException.h>

#include <boost/lexical_cast.hpp>


namespace OrthancWSI
{
  void BackgroundColor::Clear()
  {
    present_ = false;
    red_ = 0;
    green_ = 0;
    blue_ = 0;
  }


  void BackgroundColor::SetValue(uint8_t red,
                                 uint8_t green,
                                 uint8_t blue)
  {
    present_ = true;
    red_ = red;
    green_ = green;
    blue_ = blue;
  }


  uint8_t BackgroundColor::GetRed() const
  {
    if (present_)
    {
      return red_;
    }
    else
    {
      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
    }
  }


  uint8_t BackgroundColor::GetGreen() const
  {
    if (present_)
    {
      return green_;
    }
    else
    {
      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
    }
  }


  uint8_t BackgroundColor::GetBlue() const
  {
    if (present_)
    {
      return blue_;
    }
    else
    {
      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
    }
  }


  std::string BackgroundColor::Format() const
  {
    if (present_)
    {
      return ("(" + boost::lexical_cast<std::string>(static_cast<unsigned int>(red_)) + "," +
              boost::lexical_cast<std::string>(static_cast<unsigned int>(green_)) + "," +
              boost::lexical_cast<std::string>(static_cast<unsigned int>(blue_)) + ")");
    }
    else
    {
      return "None";
    }
  }


  std::string BackgroundColor::ToHexadecimalString() const
  {
    if (present_)
    {
      char tmp[32];
      sprintf(tmp, "#%02x%02x%02x", red_, green_, blue_);
      return tmp;
    }
    else
    {
      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);  // Should have called "IsPresent()"
    }
  }


  std::string BackgroundColor::ToHexadecimalString(uint8_t defaultRed,
                                                   uint8_t defaultGreen,
                                                   uint8_t defaultBlue) const
  {
    char tmp[32];

    if (present_)
    {
      sprintf(tmp, "#%02x%02x%02x", red_, green_, blue_);
    }
    else
    {
      sprintf(tmp, "#%02x%02x%02x", defaultRed, defaultGreen, defaultBlue);
    }

    return tmp;
  }


  static unsigned int GetHexDigit(char c)
  {
    if (c >= '0' && c <= '9')
    {
      return c - '0';
    }
    else if (c >= 'a' && c <= 'f')
    {
      return c - 'a' + 10;
    }
    else if (c >= 'A' && c <= 'F')
    {
      return c - 'A' + 10;
    }
    else
    {
      throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
    }
  }


  BackgroundColor BackgroundColor::FromHexadecimalString(const std::string& color)
  {
    if (color.size() != 7 ||
        color[0] != '#')
    {
      throw Orthanc::OrthancException(Orthanc::ErrorCode_NetworkProtocol);
    }
    else
    {
      unsigned int r = GetHexDigit(color[1]) * 16 + GetHexDigit(color[2]);
      unsigned int g = GetHexDigit(color[3]) * 16 + GetHexDigit(color[4]);
      unsigned int b = GetHexDigit(color[5]) * 16 + GetHexDigit(color[6]);
      return BackgroundColor(r, g, b);
    }
  }


  void BackgroundColor::Fill(Orthanc::ImageAccessor& region,
                             uint8_t defaultRed,
                             uint8_t defaultGreen,
                             uint8_t defaultBlue) const
  {
    if (present_)
    {
      ImageToolbox::Set(region, red_, green_, blue_);
    }
    else
    {
      ImageToolbox::Set(region, defaultRed, defaultGreen, defaultBlue);
    }
  }
}