// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_HTTP_HTTP_AUTH_HANDLER_MOCK_H_
#define NET_HTTP_HTTP_AUTH_HANDLER_MOCK_H_

#include <memory>
#include <ostream>
#include <string>
#include <vector>

#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "net/base/completion_once_callback.h"
#include "net/base/net_errors.h"
#include "net/http/http_auth_handler.h"
#include "net/http/http_auth_handler_factory.h"
#include "url/gurl.h"

namespace url {
class SchemeHostPort;
}

namespace net {

// MockAuthHandler is used in tests to reliably trigger edge cases.
class HttpAuthHandlerMock : public HttpAuthHandler {
 public:
  enum class State {
    WAIT_FOR_INIT,
    WAIT_FOR_CHALLENGE,
    WAIT_FOR_GENERATE_AUTH_TOKEN,
    TOKEN_PENDING,
    DONE
  };

  // The Factory class returns handlers in the order they were added via
  // AddMockHandler.
  class Factory : public HttpAuthHandlerFactory {
   public:
    Factory();
    ~Factory() override;

    void AddMockHandler(std::unique_ptr<HttpAuthHandler> handler,
                        HttpAuth::Target target);

    void set_do_init_from_challenge(bool do_init_from_challenge) {
      do_init_from_challenge_ = do_init_from_challenge;
    }

    // HttpAuthHandlerFactory:
    int CreateAuthHandler(
        HttpAuthChallengeTokenizer* challenge,
        HttpAuth::Target target,
        const SSLInfo& ssl_info,
        const NetworkAnonymizationKey& network_anonymization_key,
        const url::SchemeHostPort& scheme_host_port,
        CreateReason reason,
        int nonce_count,
        const NetLogWithSource& net_log,
        HostResolver* host_resolver,
        std::unique_ptr<HttpAuthHandler>* handler) override;

   private:
    std::vector<std::unique_ptr<HttpAuthHandler>>
        handlers_[HttpAuth::AUTH_NUM_TARGETS];
    bool do_init_from_challenge_ = false;
  };

  HttpAuthHandlerMock();

  ~HttpAuthHandlerMock() override;


  void SetGenerateExpectation(bool async, int rv);

  void set_connection_based(bool connection_based) {
    connection_based_ = connection_based;
  }

  void set_allows_default_credentials(bool allows_default_credentials) {
    allows_default_credentials_ = allows_default_credentials;
  }

  void set_allows_explicit_credentials(bool allows_explicit_credentials) {
    allows_explicit_credentials_ = allows_explicit_credentials;
  }

  const GURL& request_url() const {
    return request_url_;
  }

  State state() const { return state_; }

 protected:
  // HttpAuthHandler
  bool NeedsIdentity() override;
  bool AllowsDefaultCredentials() override;
  bool AllowsExplicitCredentials() override;
  bool Init(HttpAuthChallengeTokenizer* challenge,
            const SSLInfo& ssl_info,
            const NetworkAnonymizationKey& network_anonymization_key) override;
  int GenerateAuthTokenImpl(const AuthCredentials* credentials,
                            const HttpRequestInfo* request,
                            CompletionOnceCallback callback,
                            std::string* auth_token) override;
  HttpAuth::AuthorizationResult HandleAnotherChallengeImpl(
      HttpAuthChallengeTokenizer* challenge) override;

 private:
  void OnGenerateAuthToken();

  State state_ = State::WAIT_FOR_INIT;
  CompletionOnceCallback callback_;
  bool generate_async_ = false;
  int generate_rv_ = OK;
  raw_ptr<std::string> auth_token_ = nullptr;
  bool first_round_ = true;
  bool connection_based_ = false;
  bool allows_default_credentials_ = false;
  bool allows_explicit_credentials_ = true;
  GURL request_url_;
  base::WeakPtrFactory<HttpAuthHandlerMock> weak_factory_{this};
};

void PrintTo(const HttpAuthHandlerMock::State& state, ::std::ostream* os);

}  // namespace net

#endif  // NET_HTTP_HTTP_AUTH_HANDLER_MOCK_H_