/*

 * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>

 *

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

 */

#pragma once

#include <AK/StringView.h>

#include <LibJS/Runtime/NativeFunction.h>

namespace JS {

struct AlreadyResolved final : public Cell {

    JS_CELL(AlreadyResolved, Cell);

    JS_DECLARE_ALLOCATOR(AlreadyResolved);

    bool value { false };

protected:

    // Allocated cells must be >= sizeof(FreelistEntry), which is 24 bytes -

    // but AlreadyResolved is only 16 bytes without this.

    u8 dummy[8];

};

class PromiseResolvingFunction final : public NativeFunction {

    JS_OBJECT(PromiseResolvingFunction, NativeFunction);

    JS_DECLARE_ALLOCATOR(PromiseResolvingFunction);

public:

    using FunctionType = Function<Value(VM&, Promise&, AlreadyResolved&)>;

    static NonnullGCPtr<PromiseResolvingFunction> create(Realm&, Promise&, AlreadyResolved&, FunctionType);

    virtual void initialize(Realm&) override;

    virtual ~PromiseResolvingFunction() override = default;

    virtual ThrowCompletionOr<Value> call() override;

private:

    explicit PromiseResolvingFunction(Promise&, AlreadyResolved&, FunctionType, Object& prototype);

    virtual void visit_edges(Visitor&) override;

    NonnullGCPtr<Promise> m_promise;

    NonnullGCPtr<AlreadyResolved> m_already_resolved;

    FunctionType m_native_function;

};

}