/*

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

 *

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

 */

#pragma once

#include <AK/Optional.h>

#include <LibJS/Forward.h>

#include <LibWeb/Bindings/AudioNodePrototype.h>

#include <LibWeb/Bindings/PlatformObject.h>

#include <LibWeb/DOM/EventTarget.h>

#include <LibWeb/WebIDL/Types.h>

namespace Web::WebAudio {

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

struct AudioNodeOptions {

    Optional<WebIDL::UnsignedLong> channel_count;

    Optional<Bindings::ChannelCountMode> channel_count_mode;

    Optional<Bindings::ChannelInterpretation> channel_interpretation;

};

struct AudioNodeDefaultOptions {

    WebIDL::UnsignedLong channel_count;

    Bindings::ChannelCountMode channel_count_mode;

    Bindings::ChannelInterpretation channel_interpretation;

};

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

class AudioNode : public DOM::EventTarget {

    WEB_PLATFORM_OBJECT(AudioNode, DOM::EventTarget);

    JS_DECLARE_ALLOCATOR(AudioNode);

public:

    virtual ~AudioNode() override;

    WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioNode>> connect(JS::NonnullGCPtr<AudioNode> destination_node, WebIDL::UnsignedLong output = 0, WebIDL::UnsignedLong input = 0);

    void connect(JS::NonnullGCPtr<AudioParam> destination_param, WebIDL::UnsignedLong output = 0);

    void disconnect();

    void disconnect(WebIDL::UnsignedLong output);

    void disconnect(JS::NonnullGCPtr<AudioNode> destination_node);

    void disconnect(JS::NonnullGCPtr<AudioNode> destination_node, WebIDL::UnsignedLong output);

    void disconnect(JS::NonnullGCPtr<AudioNode> destination_node, WebIDL::UnsignedLong output, WebIDL::UnsignedLong input);

    void disconnect(JS::NonnullGCPtr<AudioParam> destination_param);

    void disconnect(JS::NonnullGCPtr<AudioParam> destination_param, WebIDL::UnsignedLong output);

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

    JS::NonnullGCPtr<BaseAudioContext const> context() const

    {

        // The BaseAudioContext which owns this AudioNode.

        return m_context;

    }

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

    virtual WebIDL::UnsignedLong number_of_inputs() = 0;

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

    virtual WebIDL::UnsignedLong number_of_outputs() = 0;

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

    virtual WebIDL::ExceptionOr<void> set_channel_count(WebIDL::UnsignedLong);

    virtual WebIDL::UnsignedLong channel_count() const { return m_channel_count; }

    virtual WebIDL::ExceptionOr<void> set_channel_count_mode(Bindings::ChannelCountMode);

    Bindings::ChannelCountMode channel_count_mode();

    WebIDL::ExceptionOr<void> set_channel_interpretation(Bindings::ChannelInterpretation);

    Bindings::ChannelInterpretation channel_interpretation();

    WebIDL::ExceptionOr<void> initialize_audio_node_options(AudioNodeOptions const& given_options, AudioNodeDefaultOptions const& default_options);

protected:

    AudioNode(JS::Realm&, JS::NonnullGCPtr<BaseAudioContext>);

    virtual void initialize(JS::Realm&) override;

    virtual void visit_edges(Cell::Visitor&) override;

private:

    JS::NonnullGCPtr<BaseAudioContext> m_context;

    WebIDL::UnsignedLong m_channel_count { 2 };

    Bindings::ChannelCountMode m_channel_count_mode { Bindings::ChannelCountMode::Max };

    Bindings::ChannelInterpretation m_channel_interpretation { Bindings::ChannelInterpretation::Speakers };

};

}