// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_SERIAL_SERIAL_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_SERIAL_SERIAL_H_

#include "third_party/blink/public/mojom/serial/serial.mojom-blink.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/core/dom/events/event_target.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_receiver.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_remote.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_wrapper_mode.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"

namespace blink {

class ExecutionContext;
class ScriptPromiseResolver;
class ScriptState;
class SerialPort;
class SerialPortRequestOptions;

class Serial final : public EventTargetWithInlineData,
                     public ExecutionContextLifecycleObserver,
                     public mojom::blink::SerialServiceClient {
  DEFINE_WRAPPERTYPEINFO();

 public:
  explicit Serial(ExecutionContext&);

  // EventTarget
  ExecutionContext* GetExecutionContext() const override;
  const AtomicString& InterfaceName() const override;

  // ExecutionContextLifecycleObserver
  void ContextDestroyed() override;

  // SerialServiceClient
  void OnPortAdded(mojom::blink::SerialPortInfoPtr port_info) override;
  void OnPortRemoved(mojom::blink::SerialPortInfoPtr port_info) override;

  // Web-exposed interfaces
  DEFINE_ATTRIBUTE_EVENT_LISTENER(connect, kConnect)
  DEFINE_ATTRIBUTE_EVENT_LISTENER(disconnect, kDisconnect)
  ScriptPromise getPorts(ScriptState*, ExceptionState&);
  ScriptPromise requestPort(ScriptState*,
                            const SerialPortRequestOptions*,
                            ExceptionState&);

  void GetPort(
      const base::UnguessableToken& token,
      mojo::PendingReceiver<device::mojom::blink::SerialPort> receiver);
  void Trace(Visitor*) const override;

 protected:
  // EventTarget
  void AddedEventListener(const AtomicString& event_type,
                          RegisteredEventListener&) override;

 private:
  void EnsureServiceConnection();
  void OnServiceConnectionError();
  SerialPort* GetOrCreatePort(mojom::blink::SerialPortInfoPtr);
  void OnGetPorts(ScriptPromiseResolver*,
                  Vector<mojom::blink::SerialPortInfoPtr>);
  void OnRequestPort(ScriptPromiseResolver*, mojom::blink::SerialPortInfoPtr);

  HeapMojoRemote<mojom::blink::SerialService,
                 HeapMojoWrapperMode::kWithoutContextObserver>
      service_;
  HeapMojoReceiver<mojom::blink::SerialServiceClient,
                   Serial,
                   HeapMojoWrapperMode::kWithoutContextObserver>
      receiver_;
  HeapHashSet<Member<ScriptPromiseResolver>> get_ports_promises_;
  HeapHashSet<Member<ScriptPromiseResolver>> request_port_promises_;
  HeapHashMap<String, WeakMember<SerialPort>> port_cache_;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_SERIAL_SERIAL_H_