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#ifndef NO_USAGE_REWRITER

#include "rewriter/usage_rewriter.h"

#include <memory>
#include <string>

#include "base/system_util.h"
#include "config/config_handler.h"
#include "converter/segments.h"
#include "data_manager/testing/mock_data_manager.h"
#include "dictionary/pos_matcher.h"
#include "dictionary/suppression_dictionary.h"
#include "dictionary/user_dictionary.h"
#include "dictionary/user_dictionary_storage.h"
#include "dictionary/user_pos.h"
#include "protocol/commands.pb.h"
#include "protocol/config.pb.h"
#include "request/conversion_request.h"
#include "testing/base/public/googletest.h"
#include "testing/base/public/gunit.h"
#include "absl/flags/flag.h"
#include "absl/memory/memory.h"

namespace mozc {
namespace {

using dictionary::SuppressionDictionary;
using dictionary::UserDictionary;
using dictionary::UserPOS;

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

}  // namespace

class UsageRewriterTest : public ::testing::Test {
 protected:
  UsageRewriterTest() {
    convreq_.set_request(&request_);
    convreq_.set_config(&config_);
  }

  void SetUp() override {
    SystemUtil::SetUserProfileDirectory(absl::GetFlag(FLAGS_test_tmpdir));
    config::ConfigHandler::GetDefaultConfig(&config_);

    data_manager_ = absl::make_unique<testing::MockDataManager>();
    pos_matcher_.Set(data_manager_->GetPOSMatcherData());
    suppression_dictionary_ = absl::make_unique<SuppressionDictionary>();
    user_dictionary_ = absl::make_unique<UserDictionary>(
        UserPOS::CreateFromDataManager(*data_manager_), pos_matcher_,
        suppression_dictionary_.get());
  }

  void TearDown() override {
    // just in case, reset the config
    config::ConfigHandler::GetDefaultConfig(&config_);
  }

  UsageRewriter *CreateUsageRewriter() const {
    return new UsageRewriter(data_manager_.get(), user_dictionary_.get());
  }

  ConversionRequest convreq_;
  commands::Request request_;
  config::Config config_;

  std::unique_ptr<SuppressionDictionary> suppression_dictionary_;
  std::unique_ptr<UserDictionary> user_dictionary_;
  std::unique_ptr<testing::MockDataManager> data_manager_;
  dictionary::POSMatcher pos_matcher_;
};

TEST_F(UsageRewriterTest, CapabilityTest) {
  std::unique_ptr<UsageRewriter> rewriter(CreateUsageRewriter());
  EXPECT_EQ(RewriterInterface::CONVERSION | RewriterInterface::PREDICTION,
            rewriter->capability(convreq_));
}

TEST_F(UsageRewriterTest, ConjugationTest) {
  Segments segments;
  std::unique_ptr<UsageRewriter> rewriter(CreateUsageRewriter());
  Segment *seg;

  segments.Clear();
  seg = segments.push_back_segment();
  seg->set_key("うたえば");
  AddCandidate("うたえば", "歌えば", "うたえ", "歌え", seg);
  AddCandidate("うたえば", "唱えば", "うたえ", "唄え", seg);
  EXPECT_TRUE(rewriter->Rewrite(convreq_, &segments));
  EXPECT_EQ("歌う", segments.conversion_segment(0).candidate(0).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(0).usage_description);
  EXPECT_EQ("唄う", segments.conversion_segment(0).candidate(1).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(1).usage_description);
}

TEST_F(UsageRewriterTest, SingleSegmentSingleCandidateTest) {
  Segments segments;
  std::unique_ptr<UsageRewriter> rewriter(CreateUsageRewriter());
  Segment *seg;

  segments.Clear();
  seg = segments.push_back_segment();
  seg->set_key("あおい");
  AddCandidate("あおい", "青い", "あおい", "青い", seg);
  EXPECT_TRUE(rewriter->Rewrite(convreq_, &segments));
  EXPECT_EQ("青い", segments.conversion_segment(0).candidate(0).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(0).usage_description);

  segments.Clear();
  seg = segments.push_back_segment();
  seg->set_key("あおい");
  AddCandidate("あおい", "あああ", "あおい", "あああ", seg);
  EXPECT_FALSE(rewriter->Rewrite(convreq_, &segments));
  EXPECT_EQ("", segments.conversion_segment(0).candidate(0).usage_title);
  EXPECT_EQ("", segments.conversion_segment(0).candidate(0).usage_description);
}

TEST_F(UsageRewriterTest, ConfigTest) {
  Segments segments;
  std::unique_ptr<UsageRewriter> rewriter(CreateUsageRewriter());
  Segment *seg;

  // Default setting
  {
    segments.Clear();
    seg = segments.push_back_segment();
    seg->set_key("あおい");
    AddCandidate("あおい", "青い", "あおい", "青い", seg);
    EXPECT_TRUE(rewriter->Rewrite(convreq_, &segments));
  }

  {
    config_.mutable_information_list_config()->set_use_local_usage_dictionary(
        false);

    segments.Clear();
    seg = segments.push_back_segment();
    seg->set_key("あおい");
    AddCandidate("あおい", "青い", "あおい", "青い", seg);
    EXPECT_FALSE(rewriter->Rewrite(convreq_, &segments));
  }

  {
    config_.mutable_information_list_config()->set_use_local_usage_dictionary(
        true);

    segments.Clear();
    seg = segments.push_back_segment();
    seg->set_key("あおい");
    AddCandidate("あおい", "青い", "あおい", "青い", seg);
    EXPECT_TRUE(rewriter->Rewrite(convreq_, &segments));
  }
}

TEST_F(UsageRewriterTest, SingleSegmentMultiCandidatesTest) {
  Segments segments;
  std::unique_ptr<UsageRewriter> rewriter(CreateUsageRewriter());
  Segment *seg;

  segments.Clear();
  seg = segments.push_back_segment();
  seg->set_key("あおい");
  AddCandidate("あおい", "青い", "あおい", "青い", seg);
  AddCandidate("あおい", "蒼い", "あおい", "蒼い", seg);
  EXPECT_TRUE(rewriter->Rewrite(convreq_, &segments));
  EXPECT_EQ("青い", segments.conversion_segment(0).candidate(0).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(0).usage_description);
  EXPECT_EQ("蒼い", segments.conversion_segment(0).candidate(1).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(1).usage_description);

  segments.Clear();
  seg = segments.push_back_segment();
  seg->set_key("あおい");
  AddCandidate("あおい", "青い", "あおい", "青い", seg);
  AddCandidate("あおい", "あああ", "あおい", "あああ", seg);
  EXPECT_TRUE(rewriter->Rewrite(convreq_, &segments));
  EXPECT_EQ("青い", segments.conversion_segment(0).candidate(0).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(0).usage_description);
  EXPECT_EQ("", segments.conversion_segment(0).candidate(1).usage_title);
  EXPECT_EQ("", segments.conversion_segment(0).candidate(1).usage_description);

  segments.Clear();
  seg = segments.push_back_segment();
  seg->set_key("あおい");
  AddCandidate("あおい", "あああ", "あおい", "あああ", seg);
  AddCandidate("あおい", "青い", "あおい", "青い", seg);
  EXPECT_TRUE(rewriter->Rewrite(convreq_, &segments));
  EXPECT_EQ("", segments.conversion_segment(0).candidate(0).usage_title);
  EXPECT_EQ("", segments.conversion_segment(0).candidate(0).usage_description);
  EXPECT_EQ("青い", segments.conversion_segment(0).candidate(1).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(1).usage_description);

  segments.Clear();
  seg = segments.push_back_segment();
  seg->set_key("あおい");
  AddCandidate("あおい", "あああ", "あおい", "あああ", seg);
  AddCandidate("あおい", "いいい", "あおい", "いいい", seg);
  EXPECT_FALSE(rewriter->Rewrite(convreq_, &segments));
  EXPECT_EQ("", segments.conversion_segment(0).candidate(0).usage_title);
  EXPECT_EQ("", segments.conversion_segment(0).candidate(0).usage_description);
  EXPECT_EQ("", segments.conversion_segment(0).candidate(1).usage_title);
  EXPECT_EQ("", segments.conversion_segment(0).candidate(1).usage_description);
}

TEST_F(UsageRewriterTest, MultiSegmentsTest) {
  Segments segments;
  std::unique_ptr<UsageRewriter> rewriter(CreateUsageRewriter());
  Segment *seg;

  segments.Clear();
  seg = segments.push_back_segment();
  seg->set_key("あおく");
  AddCandidate("あおく", "青く", "あおく", "青く", seg);
  AddCandidate("あおく", "蒼く", "あおく", "蒼く", seg);
  AddCandidate("あおく", "アオク", "あおく", "アオク", seg);
  seg = segments.push_back_segment();
  seg->set_key("うたえば");
  AddCandidate("うたえば", "歌えば", "うたえ", "歌え", seg);
  AddCandidate("うたえば", "唱えば", "うたえ", "唄え", seg);
  EXPECT_TRUE(rewriter->Rewrite(convreq_, &segments));
  EXPECT_EQ("青い", segments.conversion_segment(0).candidate(0).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(0).usage_description);
  EXPECT_EQ("蒼い", segments.conversion_segment(0).candidate(1).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(1).usage_description);
  EXPECT_EQ("", segments.conversion_segment(0).candidate(2).usage_title);
  EXPECT_EQ("", segments.conversion_segment(0).candidate(2).usage_description);
  EXPECT_EQ("歌う", segments.conversion_segment(1).candidate(0).usage_title);
  EXPECT_NE("", segments.conversion_segment(1).candidate(0).usage_description);
  EXPECT_EQ("唄う", segments.conversion_segment(1).candidate(1).usage_title);
  EXPECT_NE("", segments.conversion_segment(1).candidate(1).usage_description);
}

TEST_F(UsageRewriterTest, SameUsageTest) {
  Segments segments;
  std::unique_ptr<UsageRewriter> rewriter(CreateUsageRewriter());
  Segment *seg;

  seg = segments.push_back_segment();
  seg->set_key("うたえば");
  AddCandidate("うたえば", "歌えば", "うたえ", "歌え", seg);
  AddCandidate("うたえば", "唱えば", "うたえ", "唄え", seg);
  AddCandidate("うたえば", "唱エバ", "うたえ", "唄え", seg);
  EXPECT_TRUE(rewriter->Rewrite(convreq_, &segments));
  EXPECT_EQ("歌う", segments.conversion_segment(0).candidate(0).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(0).usage_description);
  EXPECT_EQ("唄う", segments.conversion_segment(0).candidate(1).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(1).usage_description);
  EXPECT_EQ("唄う", segments.conversion_segment(0).candidate(2).usage_title);
  EXPECT_NE("", segments.conversion_segment(0).candidate(2).usage_description);
  EXPECT_NE(segments.conversion_segment(0).candidate(0).usage_id,
            segments.conversion_segment(0).candidate(1).usage_id);
  EXPECT_EQ(segments.conversion_segment(0).candidate(1).usage_id,
            segments.conversion_segment(0).candidate(2).usage_id);
}

TEST_F(UsageRewriterTest, GetKanjiPrefixAndOneHiragana) {
  EXPECT_EQ("合わ", UsageRewriter::GetKanjiPrefixAndOneHiragana("合わせる"));
  EXPECT_EQ("合う", UsageRewriter::GetKanjiPrefixAndOneHiragana("合う"));
  EXPECT_EQ("合合わ",
            UsageRewriter::GetKanjiPrefixAndOneHiragana("合合わせる"));
  EXPECT_EQ("", UsageRewriter::GetKanjiPrefixAndOneHiragana("合"));
  EXPECT_EQ("", UsageRewriter::GetKanjiPrefixAndOneHiragana("京都"));
  EXPECT_EQ("", UsageRewriter::GetKanjiPrefixAndOneHiragana("合合合わせる"));
  EXPECT_EQ("", UsageRewriter::GetKanjiPrefixAndOneHiragana("カタカナ"));
  EXPECT_EQ("", UsageRewriter::GetKanjiPrefixAndOneHiragana("abc"));
  EXPECT_EQ("", UsageRewriter::GetKanjiPrefixAndOneHiragana("あ合わせる"));
}

TEST_F(UsageRewriterTest, CommentFromUserDictionary) {
  // Load mock data
  {
    UserDictionaryStorage storage("");
    UserDictionaryStorage::UserDictionary *dic =
        storage.GetProto().add_dictionaries();

    UserDictionaryStorage::UserDictionaryEntry *entry = dic->add_entries();
    entry->set_key("うま");
    entry->set_value("アルパカ");
    entry->set_pos(user_dictionary::UserDictionary::NOUN);
    entry->set_comment("アルパカコメント");

    user_dictionary_->Load(storage.GetProto());
  }

  // Emulates the conversion of key="うま".
  Segments segments;
  segments.Clear();
  Segment *seg = segments.push_back_segment();
  seg->set_key("うま");
  AddCandidate("うま", "Horse", "うま", "Horse", seg);
  AddCandidate("うま", "アルパカ", "うま", "アルパカ", seg);

  std::unique_ptr<UsageRewriter> rewriter(CreateUsageRewriter());
  EXPECT_TRUE(rewriter->Rewrite(convreq_, &segments));

  // Result of ("うま", "Horse"). No comment is expected.
  const Segment::Candidate &cand0 = segments.conversion_segment(0).candidate(0);
  EXPECT_TRUE(cand0.usage_title.empty());
  EXPECT_TRUE(cand0.usage_description.empty());

  // Result of ("うま", "アルパカ"). Comment from user dictionary is expected.
  const Segment::Candidate &cand1 = segments.conversion_segment(0).candidate(1);
  EXPECT_EQ("アルパカ", cand1.usage_title);
  EXPECT_EQ("アルパカコメント", cand1.usage_description);
}

}  // namespace mozc

#endif  // NO_USAGE_REWRITER
