/*
 * Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2.0,
 * as published by the Free Software Foundation.
 *
 * This program is also distributed with certain software (including
 * but not limited to OpenSSL) that is licensed under separate terms, as
 * designated in a particular file or component or in included license
 * documentation.  The authors of MySQL hereby grant you an additional
 * permission to link the program and your derivative works with the
 * separately licensed software that they have included with MySQL.
 * 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 General Public License, version 2.0, for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef UNITTEST_TEST_UTILS_SHELL_TEST_WRAPPER_H_
#define UNITTEST_TEST_UTILS_SHELL_TEST_WRAPPER_H_

// Environment variables only

#include <condition_variable>
#include <mutex>
#include <queue>
#include <string>

#include "unittest/gtest_clean.h"
#include "unittest/test_utils.h"
#include "unittest/test_utils/sandboxes.h"

namespace tests {
/**
 * \ingroup UTFramework
 *
 * This class wrapps a Command_line_shell instance providing the required
 * hooks to feed input and retrieve output for validation.
 */
class Shell_test_wrapper {
 public:
  Shell_test_wrapper(bool disable_dummy_sandboxes = false);
  void reset();
  // This can be use to reinitialize the interactive shell with different
  // options First set the options on _options
  void reset_options();
  Shell_test_output_handler &get_output_handler();
  void execute(const std::string &line);
  std::shared_ptr<mysqlsh::Shell_options> get_options();
  void trace_protocol();
  void enable_debug();
  void enable_testutil();
  const std::shared_ptr<tests::Testutils> &utils() { return _testutil; }

  int port() { return _mysql_port_number; }
  std::string hostname() { return _hostname; }

  int sb_port(int idx) const {
    assert(idx < sandbox::k_num_ports && idx >= 0);
    return m_sandbox_ports[idx];
  }

  std::string sb_port_str(int idx) const {
    return std::to_string(sb_port(idx));
  }

  int sb_port_count() const { return sandbox::k_num_ports; }

  std::string setup_recorder(const char *sub_test_name);
  void teardown_recorder();
  void reset_replayable_shell(const char *sub_test_name);
  void teardown_replayable_shell() { teardown_recorder(); }

  template <class T>
  std::shared_ptr<T> get_global(const std::string &name) {
    shcore::Value ret_val;
    ret_val = _interactive_shell->shell_context()->get_global(name);
    return ret_val.as_object<T>();
  }

 private:
  Shell_test_output_handler output_handler;
  std::shared_ptr<mysqlsh::Shell_options> _opts;
  mysqlsh::Shell_options::Storage *_options;
  std::shared_ptr<mysqlsh::Command_line_shell> _interactive_shell;
  std::shared_ptr<tests::Testutils> _testutil;
  std::string _sandbox_dir;
  bool _recording_enabled;
  bool _skip_server_interaction;

  std::string
      _mysql_port;  //!< The port for MySQL protocol sessions, env:MYSQL_PORT

  int _mysql_port_number;  //!< The port for MySQL protocol sessions,
                           //!< env:MYSQL_PORT

  std::string _hostname;     //!< TBD
  std::string _hostname_ip;  //!< TBD

  int m_sandbox_ports[sandbox::k_num_ports];
};

template <typename T>
class Thread_queue {
 public:
  T pop() {
    std::unique_lock<std::mutex> mlock(_mutex);
    while (_queue.empty()) {
      _cond.wait(mlock);
    }
    auto item = _queue.front();
    _queue.pop();
    return item;
  }

  void push(const T &item) {
    std::unique_lock<std::mutex> mlock(_mutex);
    _queue.push(item);
    mlock.unlock();
    _cond.notify_one();
  }

  bool empty() {
    std::unique_lock<std::mutex> mlock(_mutex);
    return _queue.empty();
  }

 private:
  std::queue<T> _queue;
  std::mutex _mutex;
  std::condition_variable _cond;
};

#if 0
/*
 * This class provides a shell wrapper that runs in a thread.
 * NOTE: This class is not being used as using the shell in a thread
 * together with another shell on the main thread has random crashes
 * in some platforms, because the shell was never thought on being used
 * in a threaded way, and there are parts that share resources, i.e. singletons
 * which causes i.e. te global session to be deleted twice, even it's on a
 * a shared pointer.
 */
/*class Asynch_shell_test_wrapper {
 public:
  explicit Asynch_shell_test_wrapper(bool trace = false);

  ~Asynch_shell_test_wrapper();

  mysqlsh::Shell_options& get_options();

  void execute(const std::string& line);

  bool execute_sync(const std::string& line, float timeup = 0);

  void dump_out();
  void dump_err();
  bool wait_for_state(const std::string& state, float timeup = 0);
  void trace_protocol();
  std::string get_state();
  Shell_test_output_handler& get_output_handler();

  void start();
  void shutdown();

 private:
  Shell_test_wrapper _shell;
  bool _trace;

  std::shared_ptr<std::thread> _thread;
  std::string _state;
  bool _started;

  Thread_queue<std::string> _input_lines;
};*/
#endif
}  // namespace tests

#endif  // UNITTEST_TEST_UTILS_SHELL_TEST_WRAPPER_H_
