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

#ifndef CONTENT_BROWSER_WEB_PACKAGE_MOCK_SIGNED_EXCHANGE_HANDLER_H_
#define CONTENT_BROWSER_WEB_PACKAGE_MOCK_SIGNED_EXCHANGE_HANDLER_H_

#include <string>
#include <vector>

#include "base/time/time.h"
#include "content/browser/web_package/signed_exchange_handler.h"
#include "net/base/hash_value.h"
#include "url/gurl.h"

namespace content {

class SignedExchangeCertFetcherFactory;

class MockSignedExchangeHandlerParams {
 public:
  // |mime_type| and |response_headers| are ignored if |error| is not net::OK.
  // If |signature_expire_time| is a null Time, we treat as one day after now.
  MockSignedExchangeHandlerParams(
      const GURL& outer_url,
      SignedExchangeLoadResult result,
      net::Error error,
      const GURL& inner_url,
      const std::string& mime_type,
      std::vector<std::pair<std::string, std::string>> response_headers,
      const net::SHA256HashValue& header_integrity,
      const base::Time& signature_expire_time = base::Time());
  MockSignedExchangeHandlerParams(const MockSignedExchangeHandlerParams& other);
  ~MockSignedExchangeHandlerParams();
  const GURL outer_url;
  const SignedExchangeLoadResult result;
  const net::Error error;
  const GURL inner_url;
  const std::string mime_type;
  const std::vector<std::pair<std::string, std::string>> response_headers;
  const net::SHA256HashValue header_integrity;
  const base::Time signature_expire_time;
};

class MockSignedExchangeHandler final : public SignedExchangeHandler {
 public:
  MockSignedExchangeHandler(const MockSignedExchangeHandlerParams& params,
                            std::unique_ptr<net::SourceStream> body,
                            ExchangeHeadersCallback headers_callback);

  MockSignedExchangeHandler(const MockSignedExchangeHandler&) = delete;
  MockSignedExchangeHandler& operator=(const MockSignedExchangeHandler&) =
      delete;

  ~MockSignedExchangeHandler() override;
  bool GetSignedExchangeInfoForPrefetchCache(
      PrefetchedSignedExchangeCacheEntry& entry) const override;

  // The mocked, simulated responses need to include the prefix below, to help
  // reinforce that SXG format doesn't really sniff as HTML (because of
  // CBOR/binary encoding).  Ensuring that tests more closely mimic real
  // behavior seems desirable, even if in the long-term SXG might avoid
  // `no-cors` mode (see https://crbug.com/1316660).
  inline static const std::string kMockSxgPrefix = "MOCK-SXG-PREFIX: ";

 private:
  const net::SHA256HashValue header_integrity_;
  const base::Time signature_expire_time_;
  const GURL cert_url_;
  const net::IPAddress cert_server_ip_address_;
};

class MockSignedExchangeHandlerFactory final
    : public SignedExchangeHandlerFactory {
 public:
  using ExchangeHeadersCallback =
      SignedExchangeHandler::ExchangeHeadersCallback;

  // Creates a factory that creates SignedExchangeHandler which fires
  // a headers callback with the matching MockSignedExchangeHandlerParams.
  MockSignedExchangeHandlerFactory(
      std::vector<MockSignedExchangeHandlerParams> params_list);

  MockSignedExchangeHandlerFactory(const MockSignedExchangeHandlerFactory&) =
      delete;
  MockSignedExchangeHandlerFactory& operator=(
      const MockSignedExchangeHandlerFactory&) = delete;

  ~MockSignedExchangeHandlerFactory() override;

  std::unique_ptr<SignedExchangeHandler> Create(
      const GURL& outer_url,
      std::unique_ptr<net::SourceStream> body,
      ExchangeHeadersCallback headers_callback,
      std::unique_ptr<SignedExchangeCertFetcherFactory> cert_fetcher_factory)
      override;

 private:
  const std::vector<MockSignedExchangeHandlerParams> params_list_;
};

}  // namespace content

#endif  // CONTENT_BROWSER_WEB_PACKAGE_MOCK_SIGNED_EXCHANGE_HANDLER_H_