// Copyright (c) 2011 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 "chrome/browser/chromeos/proxy_cros_settings_parser.h"

#include "base/string_util.h"
#include "base/values.h"
#include "chrome/browser/chromeos/proxy_config_service_impl.h"
#include "chrome/browser/profiles/profile.h"

namespace chromeos {

// Common prefix of all proxy prefs.
const char kProxyPrefsPrefix[] = "cros.session.proxy";

// Names of proxy preferences.
const char kProxyPacUrl[]         = "cros.session.proxy.pacurl";
const char kProxySingleHttp[]     = "cros.session.proxy.singlehttp";
const char kProxySingleHttpPort[] = "cros.session.proxy.singlehttpport";
const char kProxyHttpUrl[]        = "cros.session.proxy.httpurl";
const char kProxyHttpPort[]       = "cros.session.proxy.httpport";
const char kProxyHttpsUrl[]       = "cros.session.proxy.httpsurl";
const char kProxyHttpsPort[]      = "cros.session.proxy.httpsport";
const char kProxyType[]           = "cros.session.proxy.type";
const char kProxySingle[]         = "cros.session.proxy.single";
const char kProxyFtpUrl[]         = "cros.session.proxy.ftpurl";
const char kProxyFtpPort[]        = "cros.session.proxy.ftpport";
const char kProxySocks[]          = "cros.session.proxy.socks";
const char kProxySocksPort[]      = "cros.session.proxy.socksport";
const char kProxyIgnoreList[]     = "cros.session.proxy.ignorelist";

const char* const kProxySettings[] = {
  kProxyPacUrl,
  kProxySingleHttp,
  kProxySingleHttpPort,
  kProxyHttpUrl,
  kProxyHttpPort,
  kProxyHttpsUrl,
  kProxyHttpsPort,
  kProxyType,
  kProxySingle,
  kProxyFtpUrl,
  kProxyFtpPort,
  kProxySocks,
  kProxySocksPort,
  kProxyIgnoreList,
};

// We have to explicitly export this because the arraysize macro doesn't like
// extern arrays as their size is not known on compile time.
const size_t kProxySettingsCount = arraysize(kProxySettings);

namespace {

base::Value* CreateServerHostValue(
    const ProxyConfigServiceImpl::ProxyConfig::ManualProxy& proxy) {
  return proxy.server.is_valid() ?
         base::Value::CreateStringValue(proxy.server.host_port_pair().host()) :
         NULL;
}

base::Value* CreateServerPortValue(
    const ProxyConfigServiceImpl::ProxyConfig::ManualProxy& proxy) {
  return proxy.server.is_valid() ?
         base::Value::CreateIntegerValue(proxy.server.host_port_pair().port()) :
         NULL;
}

net::ProxyServer CreateProxyServer(std::string host,
                                   uint16 port,
                                   net::ProxyServer::Scheme scheme) {
  if (host.length() == 0 && port == 0)
    return net::ProxyServer();
  if (port == 0)
    port = net::ProxyServer::GetDefaultPortForScheme(scheme);
  net::HostPortPair host_port_pair(host, port);
  return net::ProxyServer(scheme, host_port_pair);
}

net::ProxyServer CreateProxyServerFromHost(
    const std::string& host,
    const ProxyConfigServiceImpl::ProxyConfig::ManualProxy& proxy,
    net::ProxyServer::Scheme scheme) {
  uint16 port = 0;
  if (proxy.server.is_valid())
    port = proxy.server.host_port_pair().port();
  return CreateProxyServer(host, port, scheme);
}

net::ProxyServer CreateProxyServerFromPort(
    uint16 port,
    const ProxyConfigServiceImpl::ProxyConfig::ManualProxy& proxy,
    net::ProxyServer::Scheme scheme) {
  std::string host;
  if (proxy.server.is_valid())
    host = proxy.server.host_port_pair().host();
  return CreateProxyServer(host, port, scheme);
}

}  // namespace

namespace proxy_cros_settings_parser {

bool IsProxyPref(const std::string& path) {
  return StartsWithASCII(path, kProxyPrefsPrefix, true);
}

void SetProxyPrefValue(Profile* profile,
                       const std::string& path,
                       const base::Value* in_value) {
  if (!in_value) {
    NOTREACHED();
    return;
  }

  chromeos::ProxyConfigServiceImpl* config_service =
      profile->GetProxyConfigTracker();
  // Retrieve proxy config.
  chromeos::ProxyConfigServiceImpl::ProxyConfig config;
  config_service->UIGetProxyConfig(&config);

  if (path == kProxyPacUrl) {
    std::string val;
    if (in_value->GetAsString(&val)) {
      GURL url(val);
      if (url.is_valid())
        config_service->UISetProxyConfigToPACScript(url);
      else
        config_service->UISetProxyConfigToAutoDetect();
    }
  } else if (path == kProxySingleHttp) {
    std::string val;
    if (in_value->GetAsString(&val)) {
      config_service->UISetProxyConfigToSingleProxy(CreateProxyServerFromHost(
          val, config.single_proxy, net::ProxyServer::SCHEME_HTTP));
    }
  } else if (path == kProxySingleHttpPort) {
    int val;
    if (in_value->GetAsInteger(&val)) {
      config_service->UISetProxyConfigToSingleProxy(CreateProxyServerFromPort(
          val, config.single_proxy, net::ProxyServer::SCHEME_HTTP));
    }
  } else if (path == kProxyHttpUrl) {
    std::string val;
    if (in_value->GetAsString(&val)) {
      config_service->UISetProxyConfigToProxyPerScheme("http",
          CreateProxyServerFromHost(
              val, config.http_proxy, net::ProxyServer::SCHEME_HTTP));
    }
  } else if (path == kProxyHttpPort) {
    int val;
    if (in_value->GetAsInteger(&val)) {
      config_service->UISetProxyConfigToProxyPerScheme("http",
          CreateProxyServerFromPort(
              val, config.http_proxy, net::ProxyServer::SCHEME_HTTP));
    }
  } else if (path == kProxyHttpsUrl) {
    std::string val;
    if (in_value->GetAsString(&val)) {
      config_service->UISetProxyConfigToProxyPerScheme("https",
          CreateProxyServerFromHost(
              val, config.https_proxy, net::ProxyServer::SCHEME_HTTP));
    }
  } else if (path == kProxyHttpsPort) {
    int val;
    if (in_value->GetAsInteger(&val)) {
      config_service->UISetProxyConfigToProxyPerScheme("https",
          CreateProxyServerFromPort(
              val, config.https_proxy, net::ProxyServer::SCHEME_HTTP));
    }
  } else if (path == kProxyType) {
    int val;
    if (in_value->GetAsInteger(&val)) {
      if (val == 3) {
        if (config.automatic_proxy.pac_url.is_valid())
          config_service->UISetProxyConfigToPACScript(
              config.automatic_proxy.pac_url);
        else
          config_service->UISetProxyConfigToAutoDetect();
      } else if (val == 2) {
        if (config.single_proxy.server.is_valid()) {
          config_service->UISetProxyConfigToSingleProxy(
              config.single_proxy.server);
        } else {
          bool set_config = false;
          if (config.http_proxy.server.is_valid()) {
            config_service->UISetProxyConfigToProxyPerScheme("http",
                config.http_proxy.server);
            set_config = true;
          }
          if (config.https_proxy.server.is_valid()) {
            config_service->UISetProxyConfigToProxyPerScheme("https",
                config.https_proxy.server);
            set_config = true;
          }
          if (config.ftp_proxy.server.is_valid()) {
            config_service->UISetProxyConfigToProxyPerScheme("ftp",
                config.ftp_proxy.server);
            set_config = true;
          }
          if (config.socks_proxy.server.is_valid()) {
            config_service->UISetProxyConfigToProxyPerScheme("socks",
                config.socks_proxy.server);
            set_config = true;
          }
          if (!set_config) {
            config_service->UISetProxyConfigToProxyPerScheme("http",
                net::ProxyServer());
          }
        }
      } else {
        config_service->UISetProxyConfigToDirect();
      }
    }
  } else if (path == kProxySingle) {
    bool val;
    if (in_value->GetAsBoolean(&val)) {
      if (val)
        config_service->UISetProxyConfigToSingleProxy(
            config.single_proxy.server);
      else
        config_service->UISetProxyConfigToProxyPerScheme("http",
            config.http_proxy.server);
    }
  } else if (path == kProxyFtpUrl) {
    std::string val;
    if (in_value->GetAsString(&val)) {
      config_service->UISetProxyConfigToProxyPerScheme("ftp",
          CreateProxyServerFromHost(
              val, config.ftp_proxy, net::ProxyServer::SCHEME_HTTP));
    }
  } else if (path == kProxyFtpPort) {
    int val;
    if (in_value->GetAsInteger(&val)) {
      config_service->UISetProxyConfigToProxyPerScheme("ftp",
          CreateProxyServerFromPort(
              val, config.ftp_proxy, net::ProxyServer::SCHEME_HTTP));
    }
  } else if (path == kProxySocks) {
    std::string val;
    if (in_value->GetAsString(&val)) {
      config_service->UISetProxyConfigToProxyPerScheme("socks",
          CreateProxyServerFromHost(val, config.socks_proxy,
                                    StartsWithASCII(val, "socks5://", false) ?
                                        net::ProxyServer::SCHEME_SOCKS5 :
                                        net::ProxyServer::SCHEME_SOCKS4));
    }
  } else if (path == kProxySocksPort) {
    int val;
    if (in_value->GetAsInteger(&val)) {
      std::string host = config.socks_proxy.server.host_port_pair().host();
      config_service->UISetProxyConfigToProxyPerScheme("socks",
          CreateProxyServerFromPort(val, config.socks_proxy,
                                    StartsWithASCII(host, "socks5://", false) ?
                                        net::ProxyServer::SCHEME_SOCKS5 :
                                        net::ProxyServer::SCHEME_SOCKS4));
    }
  } else if (path == kProxyIgnoreList) {
    net::ProxyBypassRules bypass_rules;
    if (in_value->GetType() == base::Value::TYPE_LIST) {
      const ListValue* list_value = static_cast<const ListValue*>(in_value);
      for (size_t x = 0; x < list_value->GetSize(); x++) {
        std::string val;
        if (list_value->GetString(x, &val)) {
          bypass_rules.AddRuleFromString(val);
        }
      }
      config_service->UISetProxyConfigBypassRules(bypass_rules);
    }
  }
}

bool GetProxyPrefValue(Profile* profile,
                       const std::string& path,
                       base::Value** out_value) {
  bool found = false;
  bool managed = false;
  std::string controlled_by;
  base::Value* data = NULL;
  chromeos::ProxyConfigServiceImpl* config_service =
      profile->GetProxyConfigTracker();
  chromeos::ProxyConfigServiceImpl::ProxyConfig config;
  config_service->UIGetProxyConfig(&config);

  if (path == kProxyPacUrl) {
    // Only show pacurl for pac-script mode.
    if (config.mode ==
            chromeos::ProxyConfigServiceImpl::ProxyConfig::MODE_PAC_SCRIPT &&
        config.automatic_proxy.pac_url.is_valid()) {
      data =
          base::Value::CreateStringValue(config.automatic_proxy.pac_url.spec());
    }
    found = true;
  } else if (path == kProxySingleHttp) {
    data = CreateServerHostValue(config.single_proxy);
    found = true;
  } else if (path == kProxySingleHttpPort) {
    data = CreateServerPortValue(config.single_proxy);
    found = true;
  } else if (path == kProxyHttpUrl) {
    data = CreateServerHostValue(config.http_proxy);
    found = true;
  } else if (path == kProxyHttpsUrl) {
    data = CreateServerHostValue(config.https_proxy);
    found = true;
  } else if (path == kProxyType) {
    if (config.mode ==
        chromeos::ProxyConfigServiceImpl::ProxyConfig::MODE_AUTO_DETECT ||
        config.mode ==
        chromeos::ProxyConfigServiceImpl::ProxyConfig::MODE_PAC_SCRIPT) {
      data = base::Value::CreateIntegerValue(3);
    } else if (config.mode ==
        chromeos::ProxyConfigServiceImpl::ProxyConfig::MODE_SINGLE_PROXY ||
        config.mode ==
        chromeos::ProxyConfigServiceImpl::ProxyConfig::MODE_PROXY_PER_SCHEME) {
      data = base::Value::CreateIntegerValue(2);
    } else {
      data = base::Value::CreateIntegerValue(1);
    }
    switch (config.state) {
       case ProxyPrefs::CONFIG_POLICY:
         controlled_by = "policyManagedPrefsBannerText";
         break;
       case ProxyPrefs::CONFIG_EXTENSION:
         controlled_by = "extensionManagedPrefsBannerText";
         break;
       case ProxyPrefs::CONFIG_OTHER_PRECEDE:
         controlled_by = "unmodifiablePrefsBannerText";
         break;
       default:
         if (!config.user_modifiable)
           controlled_by = "enableSharedProxiesBannerText";
         break;
    }
    found = true;
  } else if (path == kProxySingle) {
    data = base::Value::CreateBooleanValue(config.mode ==
        chromeos::ProxyConfigServiceImpl::ProxyConfig::MODE_SINGLE_PROXY);
    found = true;
  } else if (path == kProxyFtpUrl) {
    data = CreateServerHostValue(config.ftp_proxy);
    found = true;
  } else if (path == kProxySocks) {
    data = CreateServerHostValue(config.socks_proxy);
    found = true;
  } else if (path == kProxyHttpPort) {
    data = CreateServerPortValue(config.http_proxy);
    found = true;
  } else if (path == kProxyHttpsPort) {
    data = CreateServerPortValue(config.https_proxy);
    found = true;
  } else if (path == kProxyFtpPort) {
    data = CreateServerPortValue(config.ftp_proxy);
    found = true;
  } else if (path == kProxySocksPort) {
    data = CreateServerPortValue(config.socks_proxy);
    found = true;
  } else if (path == kProxyIgnoreList) {
    ListValue* list =  new ListValue();
    net::ProxyBypassRules::RuleList bypass_rules = config.bypass_rules.rules();
    for (size_t x = 0; x < bypass_rules.size(); x++) {
      list->Append(base::Value::CreateStringValue(bypass_rules[x]->ToString()));
    }
    *out_value = list;
    return true;
  }
  if (found) {
    DictionaryValue* dict = new DictionaryValue;
    if (!data)
      data = base::Value::CreateStringValue("");
    dict->Set("value", data);
    dict->SetBoolean("managed", managed);
    if (path == kProxyType) {
      dict->SetString("controlledBy", controlled_by);
      dict->SetBoolean("disabled", !config.user_modifiable);
    }
    *out_value = dict;
    return true;
  } else {
    *out_value = NULL;
    return false;
  }
}

}  // namespace proxy_cros_settings_parser

}  // namespace chromeos