//===-- CommandObjectMultiword.h --------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef liblldb_CommandObjectMultiword_h_
#define liblldb_CommandObjectMultiword_h_

// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Interpreter/CommandObject.h"

namespace lldb_private {

//-------------------------------------------------------------------------
// CommandObjectMultiword
//-------------------------------------------------------------------------

class CommandObjectMultiword : public CommandObject {
  // These two want to iterate over the subcommand dictionary.
  friend class CommandInterpreter;
  friend class CommandObjectSyntax;

public:
  CommandObjectMultiword(CommandInterpreter &interpreter, const char *name,
                         const char *help = nullptr,
                         const char *syntax = nullptr, uint32_t flags = 0);

  ~CommandObjectMultiword() override;

  bool IsMultiwordObject() override { return true; }

  CommandObjectMultiword *GetAsMultiwordCommand() override { return this; }

  bool LoadSubCommand(llvm::StringRef cmd_name,
                      const lldb::CommandObjectSP &command_obj) override;

  void GenerateHelpText(Stream &output_stream) override;

  lldb::CommandObjectSP GetSubcommandSP(llvm::StringRef sub_cmd,
                                        StringList *matches = nullptr) override;

  CommandObject *GetSubcommandObject(llvm::StringRef sub_cmd,
                                     StringList *matches = nullptr) override;

  void AproposAllSubCommands(llvm::StringRef prefix,
                             llvm::StringRef search_word,
                             StringList &commands_found,
                             StringList &commands_help) override;

  bool WantsRawCommandString() override { return false; }

  int HandleCompletion(Args &input, int &cursor_index,
                       int &cursor_char_position, int match_start_point,
                       int max_return_elements, bool &word_complete,
                       StringList &matches) override;

  const char *GetRepeatCommand(Args &current_command_args,
                               uint32_t index) override;

  bool Execute(const char *args_string, CommandReturnObject &result) override;

  bool IsRemovable() const override { return m_can_be_removed; }

  void SetRemovable(bool removable) { m_can_be_removed = removable; }

protected:
  CommandObject::CommandMap &GetSubcommandDictionary() {
    return m_subcommand_dict;
  }

  CommandObject::CommandMap m_subcommand_dict;
  bool m_can_be_removed;
};

class CommandObjectProxy : public CommandObject {
public:
  CommandObjectProxy(CommandInterpreter &interpreter, const char *name,
                     const char *help = nullptr, const char *syntax = nullptr,
                     uint32_t flags = 0);

  ~CommandObjectProxy() override;

  // Subclasses must provide a command object that will be transparently
  // used for this object.
  virtual CommandObject *GetProxyCommandObject() = 0;

  llvm::StringRef GetHelpLong() override;

  bool IsRemovable() const override;

  bool IsMultiwordObject() override;

  CommandObjectMultiword *GetAsMultiwordCommand() override;

  void GenerateHelpText(Stream &result) override;

  lldb::CommandObjectSP GetSubcommandSP(llvm::StringRef sub_cmd,
                                        StringList *matches = nullptr) override;

  CommandObject *GetSubcommandObject(llvm::StringRef sub_cmd,
                                     StringList *matches = nullptr) override;

  void AproposAllSubCommands(llvm::StringRef prefix,
                             llvm::StringRef search_word,
                             StringList &commands_found,
                             StringList &commands_help) override;

  bool LoadSubCommand(llvm::StringRef cmd_name,
                      const lldb::CommandObjectSP &command_obj) override;

  bool WantsRawCommandString() override;

  bool WantsCompletion() override;

  Options *GetOptions() override;

  int HandleCompletion(Args &input, int &cursor_index,
                       int &cursor_char_position, int match_start_point,
                       int max_return_elements, bool &word_complete,
                       StringList &matches) override;

  int HandleArgumentCompletion(Args &input, int &cursor_index,
                               int &cursor_char_position,
                               OptionElementVector &opt_element_vector,
                               int match_start_point, int max_return_elements,
                               bool &word_complete,
                               StringList &matches) override;

  const char *GetRepeatCommand(Args &current_command_args,
                               uint32_t index) override;

  bool Execute(const char *args_string, CommandReturnObject &result) override;

protected:
  // These two want to iterate over the subcommand dictionary.
  friend class CommandInterpreter;
  friend class CommandObjectSyntax;
};

} // namespace lldb_private

#endif // liblldb_CommandObjectMultiword_h_