// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_AI_AI_SUMMARIZER_H_
#define CHROME_BROWSER_AI_AI_SUMMARIZER_H_

#include "base/memory/weak_ptr.h"
#include "chrome/browser/ai/ai_context_bound_object.h"
#include "components/optimization_guide/core/optimization_guide_model_executor.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote_set.h"
#include "third_party/blink/public/mojom/ai/ai_summarizer.mojom.h"
#include "third_party/blink/public/mojom/ai/model_streaming_responder.mojom-forward.h"

class AISummarizer : public AIContextBoundObject,
                     public blink::mojom::AISummarizer {
 public:
  AISummarizer(AIContextBoundObjectSet& context_bound_object_set,
               std::unique_ptr<
                   optimization_guide::OptimizationGuideModelExecutor::Session>
                   summarize_session,
               blink::mojom::AISummarizerCreateOptionsPtr options,
               mojo::PendingReceiver<blink::mojom::AISummarizer> receiver);

  // `blink::mojom::AISummarizer` implementation.
  void Summarize(const std::string& input,
                 const std::string& context,
                 mojo::PendingRemote<blink::mojom::ModelStreamingResponder>
                     pending_responder) override;

  ~AISummarizer() override;

 private:
  void ModelExecutionCallback(
      const std::string& input,
      mojo::RemoteSetElementId responder_id,
      optimization_guide::OptimizationGuideModelStreamingExecutionResult
          result);

  // The underlying session provided by optimization guide component.
  std::unique_ptr<optimization_guide::OptimizationGuideModelExecutor::Session>
      summarize_session_;
  mojo::Remote<blink::mojom::AISummarizer> remote_;
  // The `RemoteSet` storing all the responders, each of them corresponds to one
  // `Summarize()` call.
  mojo::RemoteSet<blink::mojom::ModelStreamingResponder> responder_set_;

  mojo::Receiver<blink::mojom::AISummarizer> receiver_;

  const blink::mojom::AISummarizerCreateOptionsPtr options_;

  base::WeakPtrFactory<AISummarizer> weak_ptr_factory_{this};
};

#endif  // CHROME_BROWSER_AI_AI_SUMMARIZER_H_