// Copyright (c) 2012 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.

#include "google_apis/gaia/gaia_urls.h"

#include "base/command_line.h"
#include "google_apis/gaia/gaia_switches.h"
#include "google_apis/google_api_keys.h"

namespace {

// Gaia service constants
const char kDefaultGaiaBaseUrl[] = "accounts.google.com";
const char kDefaultGoogleApisBaseUrl[] = "www.googleapis.com";
const char kCaptchaUrlPrefixSuffix[] = "/";

// API calls from accounts.google.com
const char kClientLoginUrlSuffix[] = "/ClientLogin";
const char kServiceLoginUrlSuffix[] = "/ServiceLogin";
const char kIssueAuthTokenUrlSuffix[] = "/IssueAuthToken";
const char kGetUserInfoUrlSuffix[] = "/GetUserInfo";
const char kTokenAuthUrlSuffix[] = "/TokenAuth";
const char kMergeSessionUrlSuffix[] = "/MergeSession";
const char kOAuthGetAccessTokenUrlSuffix[] = "/OAuthGetAccessToken";
const char kOAuthWrapBridgeUrlSuffix[] = "/OAuthWrapBridge";
const char kOAuth1LoginUrlSuffix[] = "/OAuthLogin";
const char kOAuthRevokeTokenUrlSuffix[] = "/AuthSubRevokeToken";

// API calls from accounts.google.com (LSO)
const char kGetOAuthTokenUrlSuffix[] = "/o/oauth/GetOAuthToken/";
const char kClientLoginToOAuth2UrlSuffix[] = "/o/oauth2/programmatic_auth";
const char kOAuth2TokenUrlSuffix[] = "/o/oauth2/token";
const char kClientOAuthUrlSuffix[] = "/ClientOAuth";

// API calls from www.googleapis.com
const char kOAuth2IssueTokenUrlSuffix[] = "/oauth2/v2/IssueToken";
const char kOAuthUserInfoUrlSuffix[] = "/oauth2/v1/userinfo";
const char kOAuthWrapBridgeUserInfoScopeUrlSuffix[] = "/auth/userinfo.email";

const char kOAuth1LoginScope[] =
    "https://www.google.com/accounts/OAuthLogin";

void GetSwitchValueWithDefault(const char* switch_value,
                               const char* default_value,
                               std::string* output_value) {
  CommandLine* command_line = CommandLine::ForCurrentProcess();
  if (command_line->HasSwitch(switch_value)) {
    *output_value = command_line->GetSwitchValueASCII(switch_value);
  } else {
    *output_value = default_value;
  }
}

}  // namespace

GaiaUrls* GaiaUrls::GetInstance() {
  return Singleton<GaiaUrls>::get();
}

GaiaUrls::GaiaUrls() {
  CommandLine* command_line = CommandLine::ForCurrentProcess();
  std::string host_base;
  GetSwitchValueWithDefault(switches::kGaiaHost, kDefaultGaiaBaseUrl,
                            &host_base);

  std::string lso_base;
  GetSwitchValueWithDefault(switches::kLsoHost, kDefaultGaiaBaseUrl,
                            &lso_base);

  std::string google_apis_base;
  GetSwitchValueWithDefault(switches::kGoogleApisHost,
                            kDefaultGoogleApisBaseUrl,
                            &google_apis_base);

  captcha_url_prefix_ = "http://" + host_base + kCaptchaUrlPrefixSuffix;
  gaia_origin_url_ = "https://" + host_base;
  lso_origin_url_ = "https://" + lso_base;
  google_apis_origin_url_ = "https://" + google_apis_base;
  std::string gaia_url_base = gaia_origin_url_;
  if (command_line->HasSwitch(switches::kGaiaUrlPath)) {
    std::string path =
        command_line->GetSwitchValueASCII(switches::kGaiaUrlPath);
    if (!path.empty()) {
      if (path[0] != '/')
        gaia_url_base.append("/");

      gaia_url_base.append(path);
    }
  }


  oauth2_chrome_client_id_ =
      google_apis::GetOAuth2ClientID(google_apis::CLIENT_MAIN);
  oauth2_chrome_client_secret_ =
      google_apis::GetOAuth2ClientSecret(google_apis::CLIENT_MAIN);

  // URLs from accounts.google.com.
  gaia_login_form_realm_ = gaia_url_base + "/";
  client_login_url_ = gaia_url_base + kClientLoginUrlSuffix;
  service_login_url_ = gaia_url_base + kServiceLoginUrlSuffix;
  issue_auth_token_url_ = gaia_url_base + kIssueAuthTokenUrlSuffix;
  get_user_info_url_ = gaia_url_base + kGetUserInfoUrlSuffix;
  token_auth_url_ = gaia_url_base + kTokenAuthUrlSuffix;
  merge_session_url_ = gaia_url_base + kMergeSessionUrlSuffix;
  oauth_get_access_token_url_ = gaia_url_base +
                                kOAuthGetAccessTokenUrlSuffix;
  oauth_wrap_bridge_url_ = gaia_url_base + kOAuthWrapBridgeUrlSuffix;
  oauth_revoke_token_url_ = gaia_url_base + kOAuthRevokeTokenUrlSuffix;
  oauth1_login_url_ = gaia_url_base + kOAuth1LoginUrlSuffix;
  client_oauth_url_ = gaia_url_base + kClientOAuthUrlSuffix;

  // URLs from accounts.google.com (LSO).
  get_oauth_token_url_ = lso_origin_url_ + kGetOAuthTokenUrlSuffix;
  std::string client_login_to_oauth2_url = lso_origin_url_ +
                                           kClientLoginToOAuth2UrlSuffix;
  std::string oauth2_token_url = lso_origin_url_ + kOAuth2TokenUrlSuffix;

  // URLs from www.googleapis.com.
  oauth_wrap_bridge_user_info_scope_ = google_apis_origin_url_ +
      kOAuthWrapBridgeUserInfoScopeUrlSuffix;
  std::string oauth2_issue_token_url = google_apis_origin_url_ +
                                       kOAuth2IssueTokenUrlSuffix;
  std::string oauth_user_info_url = google_apis_origin_url_ +
                                    kOAuthUserInfoUrlSuffix;

  // TODO(zelidrag): Get rid of all these switches since all URLs should be
  // controlled only with --gaia-host, --lso-host and --google-apis-host.
  GetSwitchValueWithDefault(switches::kOAuth1LoginScope,
                            kOAuth1LoginScope,
                            &oauth1_login_scope_);
  GetSwitchValueWithDefault(switches::kClientLoginToOAuth2Url,
                            client_login_to_oauth2_url.c_str(),
                            &client_login_to_oauth2_url_);
  GetSwitchValueWithDefault(switches::kOAuth2TokenUrl,
                            oauth2_token_url.c_str(),
                            &oauth2_token_url_);
  GetSwitchValueWithDefault(switches::kOAuth2IssueTokenUrl,
                            oauth2_issue_token_url.c_str(),
                            &oauth2_issue_token_url_);
  GetSwitchValueWithDefault(switches::kOAuthUserInfoUrl,
                            oauth_user_info_url.c_str(),
                            &oauth_user_info_url_);
}

GaiaUrls::~GaiaUrls() {
}

const std::string& GaiaUrls::captcha_url_prefix() {
  return captcha_url_prefix_;
}

const std::string& GaiaUrls::gaia_origin_url() {
  return gaia_origin_url_;
}

const std::string& GaiaUrls::client_login_url() {
  return client_login_url_;
}

const std::string& GaiaUrls::service_login_url() {
  return service_login_url_;
}

const std::string& GaiaUrls::issue_auth_token_url() {
  return issue_auth_token_url_;
}

const std::string& GaiaUrls::get_user_info_url() {
  return get_user_info_url_;
}

const std::string& GaiaUrls::token_auth_url() {
  return token_auth_url_;
}

const std::string& GaiaUrls::merge_session_url() {
  return merge_session_url_;
}

const std::string& GaiaUrls::get_oauth_token_url() {
  return get_oauth_token_url_;
}

const std::string& GaiaUrls::oauth_get_access_token_url() {
  return oauth_get_access_token_url_;
}

const std::string& GaiaUrls::oauth_wrap_bridge_url() {
  return oauth_wrap_bridge_url_;
}

const std::string& GaiaUrls::oauth_user_info_url() {
  return oauth_user_info_url_;
}

const std::string& GaiaUrls::oauth_revoke_token_url() {
  return oauth_revoke_token_url_;
}

const std::string& GaiaUrls::oauth1_login_url() {
  return oauth1_login_url_;
}

const std::string& GaiaUrls::oauth1_login_scope() {
  return oauth1_login_scope_;
}

const std::string& GaiaUrls::oauth_wrap_bridge_user_info_scope() {
  return oauth_wrap_bridge_user_info_scope_;
}

const std::string& GaiaUrls::client_oauth_url() {
  return client_oauth_url_;
}

const std::string& GaiaUrls::oauth2_chrome_client_id() {
  return oauth2_chrome_client_id_;
}

const std::string& GaiaUrls::oauth2_chrome_client_secret() {
  return oauth2_chrome_client_secret_;
}

const std::string& GaiaUrls::client_login_to_oauth2_url() {
  return client_login_to_oauth2_url_;
}

const std::string& GaiaUrls::oauth2_token_url() {
  return oauth2_token_url_;
}

const std::string& GaiaUrls::oauth2_issue_token_url() {
  return oauth2_issue_token_url_;
}


const std::string& GaiaUrls::gaia_login_form_realm() {
  return gaia_login_form_realm_;
}