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#include "rewriter/command_rewriter.h"

#include <string>

#include "base/system_util.h"
#include "config/config_handler.h"
#include "converter/segments.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"

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;
}

std::string GetCommandCandidateValue(const Segment &segment) {
  for (int i = 0; i < segment.candidates_size(); ++i) {
    if (segment.candidate(i).attributes &
        Segment::Candidate::COMMAND_CANDIDATE) {
      return segment.candidate(i).value;
    }
  }
  return "";
}

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

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

  void TearDown() override {
    config::ConfigHandler::GetDefaultConfig(&config_);
    request_.Clear();
  }

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

TEST_F(CommandRewriterTest, Rewrite) {
  CommandRewriter rewriter;
  Segments segments;
  Segment *seg = segments.push_back_segment();

  EXPECT_FALSE(rewriter.Rewrite(convreq_, &segments));

  {
    Segment::Candidate *candidate = seg->add_candidate();
    seg->set_key("こまんど");
    candidate->value = "コマンド";
    EXPECT_TRUE(rewriter.Rewrite(convreq_, &segments));
    EXPECT_EQ(2, CommandCandidatesSize(*seg));
    seg->clear_candidates();
  }

  {
    Segment::Candidate *candidate = seg->add_candidate();
    seg->set_key("さじぇすと");
    candidate->value = "サジェスト";
    EXPECT_TRUE(rewriter.Rewrite(convreq_, &segments));
    EXPECT_EQ(1, CommandCandidatesSize(*seg));
    seg->clear_candidates();
  }

  {
    Segment::Candidate *candidate = seg->add_candidate();
    seg->set_key("ひみつ");
    candidate->value = "秘密";
    EXPECT_TRUE(rewriter.Rewrite(convreq_, &segments));
    EXPECT_EQ(1, CommandCandidatesSize(*seg));
    seg->clear_candidates();
  }

  {
    Segment::Candidate *candidate = seg->add_candidate();
    seg->set_key("きょうと");
    candidate->value = "京都";
    EXPECT_FALSE(rewriter.Rewrite(convreq_, &segments));
    EXPECT_EQ(0, CommandCandidatesSize(*seg));
    seg->clear_candidates();
  }

  {
    // don't trigger when multiple segments.
    Segment::Candidate *candidate = seg->add_candidate();
    seg->set_key("こまんど");
    candidate->value = "コマンド";
    Segment *seg2 = segments.push_back_segment();
    Segment::Candidate *candidate2 = seg2->add_candidate();
    seg2->set_key("です");
    candidate2->value = "です";
    EXPECT_FALSE(rewriter.Rewrite(convreq_, &segments));
    EXPECT_EQ(0, CommandCandidatesSize(*seg));
  }
}

TEST_F(CommandRewriterTest, ValueCheck) {
  CommandRewriter rewriter;
  Segments segments;
  Segment *seg = segments.push_back_segment();

  {
    Segment::Candidate *candidate = seg->add_candidate();
    seg->set_key("さじぇすと");
    candidate->value = "サジェスト";
    config_.set_presentation_mode(false);
    EXPECT_TRUE(rewriter.Rewrite(convreq_, &segments));
    EXPECT_EQ("サジェスト機能の一時停止", GetCommandCandidateValue(*seg));
    seg->clear_candidates();
  }

  {
    Segment::Candidate *candidate = seg->add_candidate();
    seg->set_key("さじぇすと");
    candidate->value = "サジェスト";
    config_.set_presentation_mode(true);
    EXPECT_TRUE(rewriter.Rewrite(convreq_, &segments));
    EXPECT_EQ("サジェスト機能を元に戻す", GetCommandCandidateValue(*seg));
    seg->clear_candidates();
  }

  {
    Segment::Candidate *candidate = seg->add_candidate();
    seg->set_key("ひみつ");
    candidate->value = "秘密";
    config_.set_incognito_mode(false);
    EXPECT_TRUE(rewriter.Rewrite(convreq_, &segments));
    EXPECT_EQ("シークレットモードをオン", GetCommandCandidateValue(*seg));
    seg->clear_candidates();
  }

  {
    Segment::Candidate *candidate = seg->add_candidate();
    seg->set_key("ひみつ");
    candidate->value = "秘密";
    config_.set_incognito_mode(true);
    EXPECT_TRUE(rewriter.Rewrite(convreq_, &segments));
    EXPECT_EQ("シークレットモードをオフ", GetCommandCandidateValue(*seg));
    seg->clear_candidates();
  }
}

}  // namespace
}  // namespace mozc
