/*

 * Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#pragma once

#include <LibJS/Runtime/Environment.h>

namespace JS {

class ObjectEnvironment final : public Environment {

    JS_ENVIRONMENT(ObjectEnvironment, Environment);

    JS_DECLARE_ALLOCATOR(ObjectEnvironment);

public:

    enum class IsWithEnvironment {

        No,

        Yes,

    };

    virtual ThrowCompletionOr<bool> has_binding(DeprecatedFlyString const& name, Optional<size_t>* = nullptr) const override;

    virtual ThrowCompletionOr<void> create_mutable_binding(VM&, DeprecatedFlyString const& name, bool can_be_deleted) override;

    virtual ThrowCompletionOr<void> create_immutable_binding(VM&, DeprecatedFlyString const& name, bool strict) override;

    virtual ThrowCompletionOr<void> initialize_binding(VM&, DeprecatedFlyString const& name, Value, Environment::InitializeBindingHint) override;

    virtual ThrowCompletionOr<void> set_mutable_binding(VM&, DeprecatedFlyString const& name, Value, bool strict) override;

    virtual ThrowCompletionOr<Value> get_binding_value(VM&, DeprecatedFlyString const& name, bool strict) override;

    virtual ThrowCompletionOr<bool> delete_binding(VM&, DeprecatedFlyString const& name) override;

    // 9.1.1.2.10 WithBaseObject ( ), https://tc39.es/ecma262/#sec-object-environment-records-withbaseobject

    virtual Object* with_base_object() const override

    {

        if (is_with_environment())

            return m_binding_object;

        return nullptr;

    }

    // [[BindingObject]], The binding object of this Environment Record.

    Object& binding_object() { return m_binding_object; }

    // [[IsWithEnvironment]], Indicates whether this Environment Record is created for a with statement.

    bool is_with_environment() const { return m_with_environment; }

private:

    ObjectEnvironment(Object& binding_object, IsWithEnvironment, Environment* outer_environment);

    virtual void visit_edges(Visitor&) override;

    NonnullGCPtr<Object> m_binding_object;

    bool m_with_environment { false };

};

}