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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// This is a test with the actual converter.  So the result of the
// conversion may differ from previous versions.

#include <string>
#include "base/base.h"
#include "base/util.h"
#include "converter/converter_interface.h"
#include "composer/table.h"
#include "session/internal/keymap.h"
#include "session/config.pb.h"
#include "session/config_handler.h"
#include "session/key_parser.h"
#include "session/session.h"
#include "session/session_handler.h"
#include "testing/base/public/gunit.h"
#include "testing/base/public/googletest.h"

DECLARE_string(test_tmpdir);

namespace mozc {

namespace {
string GetComposition(const commands::Command &command) {
  if (!command.output().has_preedit()) {
    return "";
  }

  string preedit;
  for (size_t i = 0; i < command.output().preedit().segment_size(); ++i) {
    preedit.append(command.output().preedit().segment(i).value());
  }
  return preedit;
}

void InitSessionToPrecomposition(Session* session) {
#ifdef OS_WINDOWS
  // Session is created with direct mode on Windows
  // Direct status
  commands::Command command;
  session->IMEOn(&command);
#endif  // OS_WINDOWS
}
}  // anonymous namespace

class SessionRegressionTest : public testing::Test {
 protected:
  virtual void SetUp() {
    Util::SetUserProfileDirectory(FLAGS_test_tmpdir);
    config::Config config;
    config::ConfigHandler::GetDefaultConfig(&config);
    config::ConfigHandler::SetConfig(config);
    handler_.reset(new SessionHandler());
    session_.reset(handler_->NewSession());
  }

  virtual void TearDown() {
    // just in case, reset the config in test_tmpdir
    config::Config config;
    config::ConfigHandler::GetDefaultConfig(&config);
    config::ConfigHandler::SetConfig(config);
  }

  bool SendKey(const string &key, commands::Command *command) {
    command->Clear();
    command->mutable_input()->set_type(commands::Input::SEND_KEY);
    if (!KeyParser::ParseKey(key, command->mutable_input()->mutable_key())) {
      return false;
    }
    return session_->SendKey(command);
  }

  void InsertCharacterChars(const string &chars,
                            commands::Command *command) {
    const uint32 kNoModifiers = 0;
    for (int i = 0; i < chars.size(); ++i) {
      command->clear_input();
      command->clear_output();
      commands::KeyEvent *key_event = command->mutable_input()->mutable_key();
      key_event->set_key_code(chars[i]);
      key_event->set_modifiers(kNoModifiers);
      session_->InsertCharacter(command);
    }
  }

  scoped_ptr<SessionHandler> handler_;
  scoped_ptr<Session> session_;
};


TEST_F(SessionRegressionTest, ConvertToTransliterationWithMultipleSegments) {
  InitSessionToPrecomposition(session_.get());

  commands::Command command;
  InsertCharacterChars("like", &command);

  // Convert
  command.Clear();
  session_->Convert(&command);
  {  // Check the conversion #1
    const commands::Output &output = command.output();
    EXPECT_FALSE(output.has_result());
    EXPECT_TRUE(output.has_preedit());
    EXPECT_FALSE(output.has_candidates());

    const commands::Preedit &conversion = output.preedit();
    EXPECT_EQ(2, conversion.segment_size());
    // "ぃ"
    EXPECT_EQ("\xE3\x81\x83", conversion.segment(0).value());
    // "家"
    EXPECT_EQ("\xE5\xAE\xB6", conversion.segment(1).value());
  }

  // TranslateHalfASCII
  command.Clear();
  session_->TranslateHalfASCII(&command);
  {  // Check the conversion #2
    const commands::Output &output = command.output();
    EXPECT_FALSE(output.has_result());
    EXPECT_TRUE(output.has_preedit());
    EXPECT_FALSE(output.has_candidates());

    const commands::Preedit &conversion = output.preedit();
    EXPECT_EQ(2, conversion.segment_size());
    EXPECT_EQ("li", conversion.segment(0).value());
  }
}

TEST_F(SessionRegressionTest,
       ExitTemporaryAlphanumModeAfterCommitingSugesstion) {
  // This is a regression test against http://b/2977131.
  {
    InitSessionToPrecomposition(session_.get());
    commands::Command command;
    InsertCharacterChars("NFL", &command);
    EXPECT_EQ(commands::HALF_ASCII, command.output().status().mode());
    EXPECT_EQ(commands::HALF_ASCII, command.output().mode());  // obsolete

    EXPECT_TRUE(SendKey("F10", &command));
    ASSERT_FALSE(command.output().has_candidates());
    EXPECT_FALSE(command.output().has_result());

    EXPECT_TRUE(SendKey("a", &command));
    EXPECT_FALSE(command.output().has_candidates());
#if OS_MACOSX
    // The MacOS default short cut of F10 is DisplayAsHalfAlphanumeric.
    // It does not start the conversion so output does not have any result.
    EXPECT_FALSE(command.output().has_result());
#else
    EXPECT_TRUE(command.output().has_result());
#endif
    EXPECT_EQ(commands::HIRAGANA, command.output().status().mode());
    EXPECT_EQ(commands::HIRAGANA, command.output().mode());  // obsolete
  }
}

}  // namespace mozc