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#include "converter/immutable_converter.h"

#include "base/util.h"
#include "config/config.pb.h"
#include "config/config_handler.h"
#include "converter/segments.h"
#include "converter/lattice.h"
#include "dictionary/dictionary_interface.h"
#include "dictionary/suffix_dictionary.h"
#include "testing/base/public/gunit.h"

DECLARE_string(test_tmpdir);

namespace mozc {

namespace {

void SetCandidate(const string &key, const string &value, Segment *segment) {
  segment->set_key(key);
  Segment::Candidate *candidate = segment->add_candidate();
  candidate->Init();
  candidate->key = key;
  candidate->value = value;
  candidate->content_key = key;
  candidate->content_value = value;
}

}  // namespace

class ImmutableConverterTest : public ::testing::Test {
 protected:
  virtual void SetUp() {
    Util::SetUserProfileDirectory(FLAGS_test_tmpdir);
    config::ConfigHandler::GetDefaultConfig(&default_config_);
    config::ConfigHandler::SetConfig(default_config_);
    immutable_converter_.reset(new ImmutableConverterImpl());
  }

  virtual void TearDown() {
    config::ConfigHandler::SetConfig(default_config_);
  }

  ImmutableConverterImpl *GetConverter() const {
    return immutable_converter_.get();
  }

 private:
  config::Config default_config_;
  scoped_ptr<ImmutableConverterImpl> immutable_converter_;
};

TEST_F(ImmutableConverterTest, KeepKeyForPrediction) {
  Segments segments;
  segments.set_request_type(Segments::PREDICTION);
  Segment *segment = segments.add_segment();
  // "よろしくおねがいしま"
  const string kRequestKey =
      "\xe3\x82\x88\xe3\x82\x8d\xe3\x81\x97\xe3\x81\x8f\xe3\x81\x8a"
      "\xe3\x81\xad\xe3\x81\x8c\xe3\x81\x84\xe3\x81\x97\xe3\x81\xbe";
  segment->set_key(kRequestKey);
  EXPECT_TRUE(GetConverter()->Convert(&segments));
  EXPECT_EQ(1, segments.segments_size());
  EXPECT_GT(segments.segment(0).candidates_size(), 0);
  EXPECT_EQ(kRequestKey, segments.segment(0).key());
}

TEST_F(ImmutableConverterTest, DummyCandidatesCost) {
  Segment segment;
  // "てすと"
  SetCandidate("\xE3\x81\xA6\xE3\x81\x99\xE3\x81\xA8", "test", &segment);
  GetConverter()->InsertDummyCandidates(&segment, 10);
  EXPECT_GE(segment.candidates_size(), 3);
  EXPECT_LT(segment.candidate(0).wcost, segment.candidate(1).wcost);
  EXPECT_LT(segment.candidate(0).wcost, segment.candidate(2).wcost);
}

namespace {
class KeyCheckDictionary : public DictionaryInterface {
 public:
  explicit KeyCheckDictionary(const string &query)
      : target_query_(query), received_target_query_(false) {}
  virtual ~KeyCheckDictionary() {}

  virtual Node *LookupPredictive(const char *str, int size,
                                 NodeAllocatorInterface *allocator) const {
    string key(str, size);
    if (key == target_query_) {
      received_target_query_ = true;
    }
    return NULL;
  }

  virtual Node *LookupPredictiveWithLimit(
      const char *str, int size, const Limit &limit,
      NodeAllocatorInterface *allocator) const {
    return LookupPredictive(str, size, allocator);
  }

  virtual Node *LookupPrefix(const char *str, int size,
                             NodeAllocatorInterface *allocator) const {
    // No check
    return NULL;
  }

  virtual Node *LookupPrefixWithLimit(const char *str, int size,
                                      const Limit &limit,
                                      NodeAllocatorInterface *allocator) const {
    // No check
    return NULL;
  }

  virtual Node *LookupReverse(const char *str, int size,
                              NodeAllocatorInterface *allocator) const {
    // No check
    return NULL;
  }

  bool received_target_query() const {
    return received_target_query_;
  }

 private:
  const string target_query_;
  mutable bool received_target_query_;
};
}  // namespace

TEST_F(ImmutableConverterTest, PredictiveNodesOnlyForConversionKey) {
  Segments segments;
  {
    Segment *segment = segments.add_segment();
    // "いいんじゃな"
    segment->set_key("\xe3\x81\x84\xe3\x81\x84\xe3\x82\x93\xe3\x81\x98"
                     "\xe3\x82\x83\xe3\x81\xaa");
    segment->set_segment_type(Segment::HISTORY);
    Segment::Candidate *candidate = segment->add_candidate();
    candidate->Init();
    // "いいんじゃな"
    candidate->key =
        "\xe3\x81\x84\xe3\x81\x84\xe3\x82\x93\xe3\x81\x98"
        "\xe3\x82\x83\xe3\x81\xaa";
    // "いいんじゃな"
    candidate->value =
        "\xe3\x81\x84\xe3\x81\x84\xe3\x82\x93\xe3\x81\x98"
        "\xe3\x82\x83\xe3\x81\xaa";

    segment = segments.add_segment();
    // "いか"
    segment->set_key("\xe3\x81\x84\xe3\x81\x8b");

    EXPECT_EQ(1, segments.history_segments_size());
    EXPECT_EQ(1, segments.conversion_segments_size());
  }

  Lattice lattice;
  // "いいんじゃないか"
  lattice.SetKey("\xe3\x81\x84\xe3\x81\x84\xe3\x82\x93\xe3\x81\x98"
                 "\xe3\x82\x83\xe3\x81\xaa\xe3\x81\x84\xe3\x81\x8b");

  scoped_ptr<KeyCheckDictionary> dictionary(
      // "ないか"
      new KeyCheckDictionary("\xe3\x81\xaa\xe3\x81\x84\xe3\x81\x8b"));
  DictionaryFactory::SetDictionary(dictionary.get());
  SuffixDictionaryFactory::SetSuffixDictionary(dictionary.get());

  GetConverter()->MakeLatticeNodesForPredictiveNodes(
      &lattice, &segments);

  EXPECT_FALSE(dictionary->received_target_query());

  DictionaryFactory::SetDictionary(NULL);
  SuffixDictionaryFactory::SetSuffixDictionary(NULL);
}

TEST_F(ImmutableConverterTest, AddPredictiveNodes) {
  Segments segments;
  {
    Segment *segment = segments.add_segment();
    // "よろしくおねがいしま"
    segment->set_key("\xe3\x82\x88\xe3\x82\x8d\xe3\x81\x97\xe3\x81\x8f"
                     "\xe3\x81\x8a\xe3\x81\xad\xe3\x81\x8c\xe3\x81\x84"
                     "\xe3\x81\x97\xe3\x81\xbe");

    EXPECT_EQ(1, segments.conversion_segments_size());
  }

  Lattice lattice;
  // "よろしくおねがいしま"
  lattice.SetKey("\xe3\x82\x88\xe3\x82\x8d\xe3\x81\x97\xe3\x81\x8f"
                 "\xe3\x81\x8a\xe3\x81\xad\xe3\x81\x8c\xe3\x81\x84"
                 "\xe3\x81\x97\xe3\x81\xbe");

  scoped_ptr<KeyCheckDictionary> dictionary(
      // "しま"
      new KeyCheckDictionary("\xe3\x81\x97\xe3\x81\xbe"));
  DictionaryFactory::SetDictionary(dictionary.get());
  SuffixDictionaryFactory::SetSuffixDictionary(dictionary.get());

  GetConverter()->MakeLatticeNodesForPredictiveNodes(
      &lattice, &segments);

  EXPECT_TRUE(dictionary->received_target_query());

  DictionaryFactory::SetDictionary(NULL);
  SuffixDictionaryFactory::SetSuffixDictionary(NULL);
}
}  // namespace mozc