// 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 "chromeos/dbus/shill_ipconfig_client.h"

#include <map>
#include <utility>

#include "base/bind.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_loop.h"
#include "base/values.h"
#include "chromeos/dbus/shill_property_changed_observer.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_path.h"
#include "dbus/object_proxy.h"
#include "dbus/values_util.h"
#include "third_party/cros_system_api/dbus/service_constants.h"

namespace chromeos {

namespace {

// The ShillIPConfigClient implementation.
class ShillIPConfigClientImpl : public ShillIPConfigClient {
 public:
  ShillIPConfigClientImpl();

  ////////////////////////////////////
  // ShillIPConfigClient overrides.
  void AddPropertyChangedObserver(
      const dbus::ObjectPath& ipconfig_path,
      ShillPropertyChangedObserver* observer) override {
    GetHelper(ipconfig_path)->AddPropertyChangedObserver(observer);
  }

  void RemovePropertyChangedObserver(
      const dbus::ObjectPath& ipconfig_path,
      ShillPropertyChangedObserver* observer) override {
    GetHelper(ipconfig_path)->RemovePropertyChangedObserver(observer);
  }
  void Refresh(const dbus::ObjectPath& ipconfig_path,
               const VoidDBusMethodCallback& callback) override;
  void GetProperties(const dbus::ObjectPath& ipconfig_path,
                     const DictionaryValueCallback& callback) override;
  void SetProperty(const dbus::ObjectPath& ipconfig_path,
                   const std::string& name,
                   const base::Value& value,
                   const VoidDBusMethodCallback& callback) override;
  void ClearProperty(const dbus::ObjectPath& ipconfig_path,
                     const std::string& name,
                     const VoidDBusMethodCallback& callback) override;
  void Remove(const dbus::ObjectPath& ipconfig_path,
              const VoidDBusMethodCallback& callback) override;
  ShillIPConfigClient::TestInterface* GetTestInterface() override;

 protected:
  void Init(dbus::Bus* bus) override { bus_ = bus; }

 private:
  using HelperMap = std::map<std::string, scoped_ptr<ShillClientHelper>>;

  // Returns the corresponding ShillClientHelper for the profile.
  ShillClientHelper* GetHelper(const dbus::ObjectPath& ipconfig_path) {
    HelperMap::const_iterator it = helpers_.find(ipconfig_path.value());
    if (it != helpers_.end())
      return it->second.get();

    // There is no helper for the profile, create it.
    dbus::ObjectProxy* object_proxy =
        bus_->GetObjectProxy(shill::kFlimflamServiceName, ipconfig_path);
    scoped_ptr<ShillClientHelper> helper(new ShillClientHelper(object_proxy));
    helper->MonitorPropertyChanged(shill::kFlimflamIPConfigInterface);
    ShillClientHelper* helper_ptr = helper.get();
    helpers_[ipconfig_path.value()] = std::move(helper);
    return helper_ptr;
  }

  dbus::Bus* bus_;
  HelperMap helpers_;

  DISALLOW_COPY_AND_ASSIGN(ShillIPConfigClientImpl);
};

ShillIPConfigClientImpl::ShillIPConfigClientImpl() : bus_(NULL) {
}

void ShillIPConfigClientImpl::GetProperties(
    const dbus::ObjectPath& ipconfig_path,
    const DictionaryValueCallback& callback) {
  dbus::MethodCall method_call(shill::kFlimflamIPConfigInterface,
                               shill::kGetPropertiesFunction);
  GetHelper(ipconfig_path)->CallDictionaryValueMethod(&method_call, callback);
}

void ShillIPConfigClientImpl::Refresh(
    const dbus::ObjectPath& ipconfig_path,
    const VoidDBusMethodCallback& callback) {
  dbus::MethodCall method_call(shill::kFlimflamIPConfigInterface,
                               shill::kRefreshFunction);
  GetHelper(ipconfig_path)->CallVoidMethod(&method_call, callback);
}

void ShillIPConfigClientImpl::SetProperty(
    const dbus::ObjectPath& ipconfig_path,
    const std::string& name,
    const base::Value& value,
    const VoidDBusMethodCallback& callback) {
  dbus::MethodCall method_call(shill::kFlimflamIPConfigInterface,
                               shill::kSetPropertyFunction);
  dbus::MessageWriter writer(&method_call);
  writer.AppendString(name);
  // IPConfig supports writing basic type and string array properties.
  switch (value.GetType()) {
    case base::Value::TYPE_LIST: {
      const base::ListValue* list_value = NULL;
      value.GetAsList(&list_value);
      dbus::MessageWriter variant_writer(NULL);
      writer.OpenVariant("as", &variant_writer);
      dbus::MessageWriter array_writer(NULL);
      variant_writer.OpenArray("s", &array_writer);
      for (base::ListValue::const_iterator it = list_value->begin();
           it != list_value->end();
           ++it) {
        DLOG_IF(ERROR, (*it)->GetType() != base::Value::TYPE_STRING)
            << "Unexpected type " << (*it)->GetType();
        std::string str;
        (*it)->GetAsString(&str);
        array_writer.AppendString(str);
      }
      variant_writer.CloseContainer(&array_writer);
      writer.CloseContainer(&variant_writer);
    }
    case base::Value::TYPE_BOOLEAN:
    case base::Value::TYPE_INTEGER:
    case base::Value::TYPE_DOUBLE:
    case base::Value::TYPE_STRING:
      dbus::AppendBasicTypeValueDataAsVariant(&writer, value);
      break;
    default:
      DLOG(ERROR) << "Unexpected type " << value.GetType();
  }
  GetHelper(ipconfig_path)->CallVoidMethod(&method_call, callback);
}

void ShillIPConfigClientImpl::ClearProperty(
    const dbus::ObjectPath& ipconfig_path,
    const std::string& name,
    const VoidDBusMethodCallback& callback) {
  dbus::MethodCall method_call(shill::kFlimflamIPConfigInterface,
                               shill::kClearPropertyFunction);
  dbus::MessageWriter writer(&method_call);
  writer.AppendString(name);
  GetHelper(ipconfig_path)->CallVoidMethod(&method_call, callback);
}

void ShillIPConfigClientImpl::Remove(
    const dbus::ObjectPath& ipconfig_path,
    const VoidDBusMethodCallback& callback) {
  dbus::MethodCall method_call(shill::kFlimflamIPConfigInterface,
                               shill::kRemoveConfigFunction);
  GetHelper(ipconfig_path)->CallVoidMethod(&method_call, callback);
}

ShillIPConfigClient::TestInterface*
ShillIPConfigClientImpl::GetTestInterface() {
  return NULL;
}

}  // namespace

ShillIPConfigClient::ShillIPConfigClient() {}

ShillIPConfigClient::~ShillIPConfigClient() {}

// static
ShillIPConfigClient* ShillIPConfigClient::Create() {
  return new ShillIPConfigClientImpl();
}

}  // namespace chromeos