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#include "rewriter/rewriter.h"

#include <cstddef>
#include <string>

#include "base/system_util.h"
#include "config/config.pb.h"
#include "config/config_handler.h"
#include "converter/conversion_request.h"
#include "converter/converter_mock.h"
#include "converter/segments.h"
#include "data_manager/testing/mock_data_manager.h"
#include "dictionary/pos_group.h"
#include "rewriter/rewriter_interface.h"
#include "testing/base/public/gunit.h"

DECLARE_string(test_tmpdir);

using mozc::dictionary::DictionaryInterface;
using mozc::dictionary::PosGroup;

namespace mozc {
namespace {

size_t CommandCandidatesSize(const Segment &segment) {
  size_t result = 0;
  for (int i = 0; i < segment.candidates_size(); ++i) {
    if (segment.candidate(i).attributes &
        Segment::Candidate::COMMAND_CANDIDATE) {
      result++;
    }
  }
  return result;
}

}  // namespace

class RewriterTest : public ::testing::Test {
 protected:
  virtual void SetUp() {
    SystemUtil::SetUserProfileDirectory(FLAGS_test_tmpdir);
    config::Config config;
    config::ConfigHandler::GetDefaultConfig(&config);
    config::ConfigHandler::SetConfig(config);
    converter_mock_.reset(new ConverterMock);
    const testing::MockDataManager data_manager;
    pos_group_.reset(new PosGroup(data_manager.GetPosGroupData()));
    const DictionaryInterface *kNullDictionary = NULL;
    rewriter_.reset(new RewriterImpl(converter_mock_.get(),
                                     &data_manager,
                                     pos_group_.get(),
                                     kNullDictionary));
  }

  virtual void TearDown() {
    config::Config config;
    config::ConfigHandler::GetDefaultConfig(&config);
    config::ConfigHandler::SetConfig(config);
  }

  const RewriterInterface *GetRewriter() const {
    return rewriter_.get();
  }

  scoped_ptr<ConverterMock> converter_mock_;
  scoped_ptr<const PosGroup> pos_group_;
  scoped_ptr<RewriterImpl> rewriter_;
};

// Command rewriter should be disabled on Android build. b/5851240
TEST_F(RewriterTest, CommandRewriterAvailability) {
  Segments segments;
  const ConversionRequest request;
  Segment *seg = segments.push_back_segment();

  {
    Segment::Candidate *candidate = seg->add_candidate();
    // seg->set_key("こまんど");
    // candidate->value = "コマンド";
    seg->set_key("\xE3\x81\x93\xE3\x81\xBE\xE3\x82\x93\xE3\x81\xA9");
    candidate->value = "\xE3\x82\xB3\xE3\x83\x9E"
                       "\xE3\x83\xB3\xE3\x83\x89";
    EXPECT_TRUE(GetRewriter()->Rewrite(request, &segments));
#ifdef OS_ANDROID
    EXPECT_EQ(0, CommandCandidatesSize(*seg));
#else
    EXPECT_EQ(2, CommandCandidatesSize(*seg));
#endif
    seg->clear_candidates();
  }

  {
    Segment::Candidate *candidate = seg->add_candidate();
    // seg->set_key("さじぇすと");
    // candidate->value = "サジェスト";
    seg->set_key("\xE3\x81\x95\xE3\x81\x98\xE3\x81\x87"
                 "\xE3\x81\x99\xE3\x81\xA8");
    candidate->value = "\xE3\x82\xB5\xE3\x82\xB8\xE3\x82\xA7"
                       "\xE3\x82\xB9\xE3\x83\x88";
    EXPECT_TRUE(GetRewriter()->Rewrite(request, &segments));
#ifdef OS_ANDROID
    EXPECT_EQ(0, CommandCandidatesSize(*seg));
#else
    EXPECT_EQ(1, CommandCandidatesSize(*seg));
#endif
    seg->clear_candidates();
  }
}

TEST_F(RewriterTest, EmoticonsAboveSymbols) {
  // "かおもじ"
  const char kKey[] = "\xE3\x81\x8B\xE3\x81\x8A\xE3\x82\x82\xE3\x81\x98";
  const char kEmoticon[] = "^^;";
  // "☹": A platform-dependent symbol
  const char kSymbol[] = "\xE2\x98\xB9";

  const ConversionRequest request;
  Segments segments;
  Segment *seg = segments.push_back_segment();
  Segment::Candidate *candidate = seg->add_candidate();
  seg->set_key(kKey);
  candidate->value = kKey;
  EXPECT_EQ(1, seg->candidates_size());
  EXPECT_TRUE(GetRewriter()->Rewrite(request, &segments));
  EXPECT_LT(1, seg->candidates_size());

  int emoticon_index = -1;
  int symbol_index = -1;
  for (size_t i = 0; i < seg->candidates_size(); ++i) {
    if (seg->candidate(i).value == kEmoticon) {
      emoticon_index = i;
    } else if (seg->candidate(i).value == kSymbol) {
      symbol_index = i;
    }
  }
  EXPECT_NE(-1, emoticon_index);
  EXPECT_NE(-1, symbol_index);
  EXPECT_LT(emoticon_index, symbol_index);
}

}  // namespace mozc