/*
 * Copyright (c) 2017 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <boost/algorithm/string.hpp>
#include <string>
#include <vector>

#include "vom/inspect.hpp"
#include "vom/logger.hpp"
#include "vom/om.hpp"

namespace VOM {
std::unique_ptr<std::map<std::string, inspect::command_handler*>>
  inspect::m_cmd_handlers;

std::unique_ptr<std::deque<std::pair<std::vector<std::string>, std::string>>>
  inspect::m_help_handlers;

void
inspect::handle_input(const std::string& message, std::ostream& output)
{
  if (message.length()) {
    if (message.find("help") != std::string::npos) {
      output << "Command Options: " << std::endl;
      output << "  keys              - Show all keys owning objects"
             << std::endl;
      output << "  key:XXX           - Show all object referenced by "
                "key XXX"
             << std::endl;
      output << "  all               - Show All objects" << std::endl;
      output << "Individual object_base Types:" << std::endl;

      for (auto h : *m_help_handlers) {
        output << "  {";

        for (auto s : h.first) {
          output << s << " ";
        }
        output << "} - \t";
        output << h.second;
        output << std::endl;
      }
    } else if (message.find("keys") != std::string::npos) {
      OM::dump(output);
    } else if (message.find("key:") != std::string::npos) {
      std::vector<std::string> results;
      boost::split(results, message, boost::is_any_of(":\n"));
      OM::dump(results[1], output);
    } else if (message.find("all") != std::string::npos) {
      /*
 * get the unique set of handlers, then invoke each
 */
      std::set<command_handler*> hdlrs;
      for (auto h : *m_cmd_handlers) {
        hdlrs.insert(h.second);
      }
      for (auto h : hdlrs) {
        h->show(output);
      }
    } else {
      auto it = m_cmd_handlers->find(message);

      if (it != m_cmd_handlers->end()) {
        it->second->show(output);
      } else {
        output << "Unknown Command: " << message << std::endl;
      }
    }
  }
}

void
inspect::register_handler(const std::vector<std::string>& cmds,
                          const std::string& help,
                          command_handler* handler)
{
  if (!m_cmd_handlers) {
    m_cmd_handlers.reset(new std::map<std::string, command_handler*>);
    m_help_handlers.reset(
      new std::deque<std::pair<std::vector<std::string>, std::string>>);
  }

  for (auto cmd : cmds) {
    (*m_cmd_handlers)[cmd] = handler;
  }
  m_help_handlers->push_front(std::make_pair(cmds, help));
}
}
/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "mozilla")
 * End:
 */