/*

 * Copyright (c) Meta Platforms, Inc. and affiliates.

 *

 * This source code is licensed under the MIT license found in the

 * LICENSE file in the root directory of this source tree.

 */

#ifndef HERMES_VM_DEBUGGER_DEBUGCOMMAND_H

#define HERMES_VM_DEBUGGER_DEBUGCOMMAND_H

#ifdef HERMES_ENABLE_DEBUGGER

#include "hermes/Public/DebuggerTypes.h"

#include "llvh/ADT/ArrayRef.h"

#include "llvh/ADT/StringExtras.h"

#include "llvh/ADT/StringRef.h"

#include "llvh/Support/raw_ostream.h"

#include <string>

namespace hermes {

namespace vm {

class Debugger;

struct InterpreterState;

/// Commands that can be sent to the debugger.

enum class DebugCommandType { NONE, CONTINUE, STEP, EVAL };

struct CreateBreakpointArgs {

  uint32_t filenameId;

  uint32_t line;

  uint32_t column;

};

struct PrintVarsArgs {

  /// Index of the call stack frame to print. 0 means the topmost frame.

  uint32_t frameIdx;

};

struct EvalArgs {

  /// Index of the call stack frame in which to eval. 0 means the topmost frame.

  uint32_t frameIdx;

};

struct StepArgs {

  /// Stepping mode.

  ::facebook::hermes::debugger::StepMode mode;

};

struct DebugCommand {

  DebugCommandType type;

  union {

    EvalArgs evalArgs;

    StepArgs stepArgs;

  };

  /// A generic string argument, whose interpretation is command dependent.

  std::string text = {};

  DebugCommand(DebugCommandType type) : type(type) {}

  static DebugCommand makeNone() {

    return DebugCommand{DebugCommandType::NONE};

  }

  static DebugCommand makeContinue() {

    return DebugCommand{DebugCommandType::CONTINUE};

  }

  static DebugCommand makeStep(::facebook::hermes::debugger::StepMode mode) {

    DebugCommand cmd = {DebugCommandType::STEP};

    cmd.stepArgs = StepArgs{mode};

    return cmd;

  }

  static DebugCommand makeEval(uint32_t frameIdx, std::string text) {

    DebugCommand cmd{DebugCommandType::EVAL};

    cmd.evalArgs.frameIdx = frameIdx;

    cmd.text = std::move(text);

    return cmd;

  }

};

} // namespace vm

} // namespace hermes

#endif

#endif