/*

 * Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>

 *

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

 */

#include <LibWeb/Bindings/Intrinsics.h>

#include <LibWeb/Bindings/OscillatorNodePrototype.h>

#include <LibWeb/WebAudio/AudioParam.h>

#include <LibWeb/WebAudio/BaseAudioContext.h>

#include <LibWeb/WebAudio/OscillatorNode.h>

namespace Web::WebAudio {

JS_DEFINE_ALLOCATOR(OscillatorNode);

OscillatorNode::~OscillatorNode() = default;

WebIDL::ExceptionOr<JS::NonnullGCPtr<OscillatorNode>> OscillatorNode::create(JS::Realm& realm, JS::NonnullGCPtr<BaseAudioContext> context, OscillatorOptions const& options)

{

    return construct_impl(realm, context, options);

}

// https://webaudio.github.io/web-audio-api/#dom-oscillatornode-oscillatornode

WebIDL::ExceptionOr<JS::NonnullGCPtr<OscillatorNode>> OscillatorNode::construct_impl(JS::Realm& realm, JS::NonnullGCPtr<BaseAudioContext> context, OscillatorOptions const& options)

{

    // FIXME: Invoke "Initialize the AudioNode" steps.

    TRY(verify_valid_type(realm, options.type));

    auto node = realm.vm().heap().allocate<OscillatorNode>(realm, realm, context, options);

    return node;

}

OscillatorNode::OscillatorNode(JS::Realm& realm, JS::NonnullGCPtr<BaseAudioContext> context, OscillatorOptions const& options)

    : AudioScheduledSourceNode(realm, context)

    , m_frequency(AudioParam::create(realm, options.frequency, -context->nyquist_frequency(), context->nyquist_frequency(), Bindings::AutomationRate::ARate))

{

}

// https://webaudio.github.io/web-audio-api/#dom-oscillatornode-type

Bindings::OscillatorType OscillatorNode::type() const

{

    return m_type;

}

// https://webaudio.github.io/web-audio-api/#dom-oscillatornode-type

WebIDL::ExceptionOr<void> OscillatorNode::verify_valid_type(JS::Realm& realm, Bindings::OscillatorType type)

{

    // The shape of the periodic waveform. It may directly be set to any of the type constant values except

    // for "custom". ⌛ Doing so MUST throw an InvalidStateError exception. The setPeriodicWave() method can

    // be used to set a custom waveform, which results in this attribute being set to "custom". The default

    // value is "sine". When this attribute is set, the phase of the oscillator MUST be conserved.

    if (type == Bindings::OscillatorType::Custom)

        return WebIDL::InvalidStateError::create(realm, "Oscillator node type cannot be set to 'custom'"_string);

    return {};

}

// https://webaudio.github.io/web-audio-api/#dom-oscillatornode-type

WebIDL::ExceptionOr<void> OscillatorNode::set_type(Bindings::OscillatorType type)

{

    TRY(verify_valid_type(realm(), type));

    m_type = type;

    return {};

}

void OscillatorNode::initialize(JS::Realm& realm)

{

    Base::initialize(realm);

    WEB_SET_PROTOTYPE_FOR_INTERFACE(OscillatorNode);

}

void OscillatorNode::visit_edges(Cell::Visitor& visitor)

{

    Base::visit_edges(visitor);

    visitor.visit(m_frequency);

}

}