// Copyright 2021 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef COBALT_DOM_PERFORMANCE_RESOURCE_TIMING_H_
#define COBALT_DOM_PERFORMANCE_RESOURCE_TIMING_H_

#include <string>

#include "cobalt/dom/performance_entry.h"
#include "cobalt/dom/performance_high_resolution_time.h"

#include "cobalt/script/wrappable.h"
#include "net/base/load_timing_info.h"

namespace cobalt {
namespace dom {

class Performance;

// Implements the Performance Resource Timing IDL interface, as described here:
//   https://www.w3.org/TR/resource-timing-2/#sec-resource-timing
class PerformanceResourceTiming : public PerformanceEntry {
 public:
  PerformanceResourceTiming(const std::string& name,
                            DOMHighResTimeStamp start_time,
                            DOMHighResTimeStamp end_time);

  PerformanceResourceTiming(const net::LoadTimingInfo& timing_info,
                            const std::string& initiator_type,
                            const std::string& requested_url,
                            Performance* performance,
                            base::TimeTicks time_origin);

  // Web API.
  virtual std::string initiator_type() const;
  DOMHighResTimeStamp fetch_start() const;
  DOMHighResTimeStamp domain_lookup_start() const;
  DOMHighResTimeStamp domain_lookup_end() const;
  DOMHighResTimeStamp connect_start() const;
  DOMHighResTimeStamp connect_end() const;
  DOMHighResTimeStamp secure_connection_start() const;
  DOMHighResTimeStamp request_start() const;
  DOMHighResTimeStamp response_start() const;
  // As we don't have response end in LoadTimingInfo, we collect the timestamp
  // of loading completes instead.
  DOMHighResTimeStamp response_end() const;
  uint64_t transfer_size() const;
  uint64_t encoded_body_size() const;

  std::string entry_type() const override { return "resource"; }
  PerformanceEntryType EntryTypeEnum() const override {
    return PerformanceEntry::kResource;
  }

  void SetResourceTimingEntry(const net::LoadTimingInfo& timing_info,
                              const std::string& initiator_type,
                              const std::string& requested_url,
                              const std::string& cache_mode);

  DEFINE_WRAPPABLE_TYPE(PerformanceResourceTiming);

 private:
  std::string initiator_type_;
  std::string cache_mode_;
  std::string requested_url_;
  net::LoadTimingInfo timing_info_;
  base::TimeTicks time_origin_;
  DOMHighResTimeStamp timing_info_response_end_;

  DISALLOW_COPY_AND_ASSIGN(PerformanceResourceTiming);
};
}  // namespace dom
}  // namespace cobalt

#endif  // COBALT_DOM_PERFORMANCE_RESOURCE_TIMING_H_