/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef debugger_Environment_h
#define debugger_Environment_h

#include "mozilla/Assertions.h"  // for AssertionConditionType, MOZ_ASSERT
#include "mozilla/Maybe.h"       // for Maybe

#include "jstypes.h"            // for JS_PUBLIC_API
#include "NamespaceImports.h"   // for Value, HandleId, HandleObject
#include "debugger/Debugger.h"  // for Env
#include "js/PropertySpec.h"    // for JSFunctionSpec, JSPropertySpec
#include "js/RootingAPI.h"      // for Handle, MutableHandle
#include "vm/NativeObject.h"    // for NativeObject
#include "vm/Scope.h"           // for ScopeKind

class JS_PUBLIC_API JSObject;
struct JS_PUBLIC_API JSContext;
class JSTracer;

namespace js {

class GlobalObject;

enum class DebuggerEnvironmentType { Declarative, With, Object };

class DebuggerEnvironment : public NativeObject {
 public:
  enum { ENV_SLOT, OWNER_SLOT, RESERVED_SLOTS };

  static const JSClass class_;

  static NativeObject* initClass(JSContext* cx, Handle<GlobalObject*> global,
                                 HandleObject dbgCtor);
  static DebuggerEnvironment* create(JSContext* cx, HandleObject proto,
                                     HandleObject referent,
                                     Handle<NativeObject*> debugger);

  void trace(JSTracer* trc);

  DebuggerEnvironmentType type() const;
  mozilla::Maybe<ScopeKind> scopeKind() const;
  [[nodiscard]] bool getParent(
      JSContext* cx, MutableHandle<DebuggerEnvironment*> result) const;
  [[nodiscard]] bool getObject(JSContext* cx,
                               MutableHandle<DebuggerObject*> result) const;
  [[nodiscard]] bool getCalleeScript(
      JSContext* cx, MutableHandle<DebuggerScript*> result) const;
  bool isDebuggee() const;
  bool isOptimized() const;

  [[nodiscard]] static bool getNames(JSContext* cx,
                                     Handle<DebuggerEnvironment*> environment,
                                     MutableHandleIdVector result);
  [[nodiscard]] static bool find(JSContext* cx,
                                 Handle<DebuggerEnvironment*> environment,
                                 HandleId id,
                                 MutableHandle<DebuggerEnvironment*> result);
  [[nodiscard]] static bool getVariable(
      JSContext* cx, Handle<DebuggerEnvironment*> environment, HandleId id,
      MutableHandleValue result);
  [[nodiscard]] static bool setVariable(
      JSContext* cx, Handle<DebuggerEnvironment*> environment, HandleId id,
      HandleValue value);

  Debugger* owner() const;

  Env* maybeReferent() const { return maybePtrFromReservedSlot<Env>(ENV_SLOT); }

  Env* referent() const {
    Env* env = maybeReferent();
    MOZ_ASSERT(env);
    return env;
  }

  void clearReferent() { clearReservedSlotGCThingAsPrivate(ENV_SLOT); }

 private:
  static const JSClassOps classOps_;

  static const JSPropertySpec properties_[];
  static const JSFunctionSpec methods_[];

  bool requireDebuggee(JSContext* cx) const;

  [[nodiscard]] static bool construct(JSContext* cx, unsigned argc, Value* vp);

  struct CallData;
};

} /* namespace js */

#endif /* debugger_Environment_h */