/*

 * Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>

 *

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

 */

#include <LibJS/Runtime/AbstractOperations.h>

#include <LibJS/Runtime/Error.h>

#include <LibJS/Runtime/FinalizationRegistry.h>

#include <LibJS/Runtime/FinalizationRegistryConstructor.h>

#include <LibJS/Runtime/GlobalObject.h>

#include <LibJS/Runtime/JobCallback.h>

namespace JS {

JS_DEFINE_ALLOCATOR(FinalizationRegistryConstructor);

FinalizationRegistryConstructor::FinalizationRegistryConstructor(Realm& realm)

    : NativeFunction(realm.vm().names.FinalizationRegistry.as_string(), realm.intrinsics().function_prototype())

{

}

void FinalizationRegistryConstructor::initialize(Realm& realm)

{

    auto& vm = this->vm();

    Base::initialize(realm);

    // 26.2.2.1 FinalizationRegistry.prototype, https://tc39.es/ecma262/#sec-finalization-registry.prototype

    define_direct_property(vm.names.prototype, realm.intrinsics().finalization_registry_prototype(), 0);

    define_direct_property(vm.names.length, Value(1), Attribute::Configurable);

}

// 26.2.1.1 FinalizationRegistry ( cleanupCallback ), https://tc39.es/ecma262/#sec-finalization-registry-cleanup-callback

ThrowCompletionOr<Value> FinalizationRegistryConstructor::call()

{

    auto& vm = this->vm();

    // 1. If NewTarget is undefined, throw a TypeError exception.

    return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.FinalizationRegistry);

}

// 26.2.1.1 FinalizationRegistry ( cleanupCallback ), https://tc39.es/ecma262/#sec-finalization-registry-cleanup-callback

ThrowCompletionOr<NonnullGCPtr<Object>> FinalizationRegistryConstructor::construct(FunctionObject& new_target)

{

    auto& vm = this->vm();

    // 2. If IsCallable(cleanupCallback) is false, throw a TypeError exception.

    auto cleanup_callback = vm.argument(0);

    if (!cleanup_callback.is_function())

        return vm.throw_completion<TypeError>(ErrorType::NotAFunction, cleanup_callback.to_string_without_side_effects());

    // 3. Let finalizationRegistry be ? OrdinaryCreateFromConstructor(NewTarget, "%FinalizationRegistry.prototype%", « [[Realm]], [[CleanupCallback]], [[Cells]] »).

    // 4. Let fn be the active function object.

    // NOTE: This is not necessary, the active function object is `this`.

    // 5. Set finalizationRegistry.[[Realm]] to fn.[[Realm]].

    // 6. Set finalizationRegistry.[[CleanupCallback]] to HostMakeJobCallback(cleanupCallback).

    // 7. Set finalizationRegistry.[[Cells]] to a new empty List.

    // NOTE: This is done inside FinalizationRegistry instead of here.

    // 8. Return finalizationRegistry.

    return TRY(ordinary_create_from_constructor<FinalizationRegistry>(vm, new_target, &Intrinsics::finalization_registry_prototype, *realm(), vm.host_make_job_callback(cleanup_callback.as_function())));

}

}