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#include "unix/scim/mozc_connection.h"

#include <string>

#include "base/logging.h"
#include "base/util.h"
#include "client/client.h"
#include "ipc/ipc.h"
#include "session/commands.pb.h"
#include "session/ime_switch_util.h"
#include "unix/scim/scim_key_translator.h"

namespace mozc_unix_scim {

MozcConnectionInterface::~MozcConnectionInterface() {
}

MozcConnection::MozcConnection(
    mozc::client::ServerLauncherInterface *server_launcher,
    mozc::IPCClientFactoryInterface *client_factory)
    : translator_(new ScimKeyTranslator),
      preedit_method_(mozc::config::Config::ROMAN) {
  VLOG(1) << "MozcConnection is created";
  mozc::client::ClientInterface *client =
      mozc::client::ClientFactory::NewClient();
  client->SetServerLauncher(server_launcher);
  client->SetIPCClientFactory(client_factory);
  client_.reset(client);

  mozc::config::Config config;
  if (client_->EnsureConnection() &&
      client_->GetConfig(&config) && config.has_preedit_method()) {
    preedit_method_ = config.preedit_method();
  }
  VLOG(1)
      << "Current preedit method is "
      << (preedit_method_ == mozc::config::Config::ROMAN ? "Roman" : "Kana");
}

MozcConnection::~MozcConnection() {
  client_->SyncData();
  VLOG(1) << "MozcConnection is destroyed";
}

bool MozcConnection::TrySendKeyEvent(
    const scim::KeyEvent &key,
    mozc::commands::CompositionMode composition_mode,
    mozc::commands::Output *out,
    string *out_error) const {
  DCHECK(out);
  DCHECK(out_error);

  // Call EnsureConnection just in case MozcConnection::MozcConnection() fails
  // to establish the server connection.
  if (!client_->EnsureConnection()) {
    *out_error = "EnsureConnection failed";
    VLOG(1) << "EnsureConnection failed";
    return false;
  }

  mozc::commands::KeyEvent event;
  translator_->Translate(key, preedit_method_, &event);

  if ((composition_mode == mozc::commands::DIRECT) &&
      !mozc::config::ImeSwitchUtil::IsTurnOnInDirectMode(event)) {
    VLOG(1) << "In DIRECT mode. Not consumed.";
    return false;  // not consumed.
  }

  VLOG(1) << "TrySendKeyEvent: " << endl << event.DebugString();
  if (!client_->SendKey(event, out)) {
    *out_error = "SendKey failed";
    VLOG(1) << "ERROR";
    return false;
  }
  VLOG(1) << "OK: " << endl << out->DebugString();
  return true;
}

bool MozcConnection::TrySendClick(int32 unique_id,
                                  mozc::commands::Output *out,
                                  string *out_error) const {
  DCHECK(out);
  DCHECK(out_error);

  mozc::commands::SessionCommand command;
  translator_->TranslateClick(unique_id, &command);
  return TrySendCommandInternal(command, out, out_error);
}

bool MozcConnection::TrySendCompositionMode(
    mozc::commands::CompositionMode mode,
    mozc::commands::Output *out,
    string *out_error) const {
  DCHECK(out);
  DCHECK(out_error);

  mozc::commands::SessionCommand command;
  command.set_type(mozc::commands::SessionCommand::SWITCH_INPUT_MODE);
  command.set_composition_mode(mode);
  return TrySendCommandInternal(command, out, out_error);
}

bool MozcConnection::TrySendCommand(
    mozc::commands::SessionCommand::CommandType type,
    mozc::commands::Output *out,
    string *out_error) const {
  DCHECK(out);
  DCHECK(out_error);

  mozc::commands::SessionCommand command;
  command.set_type(type);
  return TrySendCommandInternal(command, out, out_error);
}

bool MozcConnection::TrySendCommandInternal(
    const mozc::commands::SessionCommand& command,
    mozc::commands::Output *out,
    string *out_error) const {
  VLOG(1) << "TrySendCommandInternal: " << endl << command.DebugString();
  if (!client_->SendCommand(command, out)) {
    *out_error = "SendCommand failed";
    VLOG(1) << "ERROR";
    return false;
  }
  VLOG(1) << "OK: " << endl << out->DebugString();
  return true;
}

bool MozcConnection::CanSend(const scim::KeyEvent &key) const {
  return translator_->CanConvert(key);
}

MozcConnection *MozcConnection::CreateMozcConnection() {
  mozc::client::ServerLauncher *server_launcher
      = new mozc::client::ServerLauncher;

  return new MozcConnection(server_launcher, new mozc::IPCClientFactory);
}

}  // namespace mozc_unix_scim