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#include <string>
#include <vector>
#include "base/base.h"
#include "base/file_stream.h"
#include "base/util.h"
#include "dictionary/dictionary_token.h"
#include "dictionary/text_dictionary_loader.h"
#include "testing/base/public/googletest.h"
#include "testing/base/public/gunit.h"

DECLARE_string(test_tmpdir);

namespace mozc {
namespace {

const char kTextLines[] =
"key_test1\t0\t0\t1\tvalue_test1\n"
"foo\t1\t2\t3\tbar\n"
"buz\t10\t20\t30\tfoobar\n";

TEST(TextDictionaryLoaderText, BasicTest) {
  {
    TextDictionaryLoader loader;
    vector<Token *> tokens;
    loader.CollectTokens(&tokens);
    EXPECT_TRUE(tokens.empty());
  }

  const string filename = Util::JoinPath(FLAGS_test_tmpdir, "test.tsv");
  {
    OutputFileStream ofs(filename.c_str());
    ofs << kTextLines;
  }

  {
    TextDictionaryLoader loader;
    vector<Token *> tokens;
    EXPECT_TRUE(loader.Open(filename.c_str()));
    loader.CollectTokens(&tokens);

    EXPECT_EQ(3, tokens.size());

    EXPECT_EQ("key_test1", tokens[0]->key);
    EXPECT_EQ("value_test1", tokens[0]->value);
    EXPECT_EQ(0, tokens[0]->lid);
    EXPECT_EQ(0, tokens[0]->rid);
    EXPECT_EQ(1, tokens[0]->cost);

    EXPECT_EQ("foo", tokens[1]->key);
    EXPECT_EQ("bar", tokens[1]->value);
    EXPECT_EQ(1, tokens[1]->lid);
    EXPECT_EQ(2, tokens[1]->rid);
    EXPECT_EQ(3, tokens[1]->cost);

    EXPECT_EQ("buz", tokens[2]->key);
    EXPECT_EQ("foobar", tokens[2]->value);
    EXPECT_EQ(10, tokens[2]->lid);
    EXPECT_EQ(20, tokens[2]->rid);
    EXPECT_EQ(30, tokens[2]->cost);

    loader.Close();
    tokens.clear();
    loader.CollectTokens(&tokens);
    EXPECT_TRUE(tokens.empty());
  }

  {
    TextDictionaryLoader loader;
    vector<Token *> tokens;
    EXPECT_TRUE(loader.OpenWithLineLimit(filename.c_str(), 2));
    loader.CollectTokens(&tokens);

    EXPECT_EQ(2, tokens.size());

    EXPECT_EQ("key_test1", tokens[0]->key);
    EXPECT_EQ("value_test1", tokens[0]->value);
    EXPECT_EQ(0, tokens[0]->lid);
    EXPECT_EQ(0, tokens[0]->rid);
    EXPECT_EQ(1, tokens[0]->cost);

    EXPECT_EQ("foo", tokens[1]->key);
    EXPECT_EQ("bar", tokens[1]->value);
    EXPECT_EQ(1, tokens[1]->lid);
    EXPECT_EQ(2, tokens[1]->rid);
    EXPECT_EQ(3, tokens[1]->cost);

    loader.Close();
    tokens.clear();
    loader.CollectTokens(&tokens);
    EXPECT_TRUE(tokens.empty());
  }

  {
    TextDictionaryLoader loader;
    vector<Token *> tokens;
    // open twice -- tokens are cleared everytime
    EXPECT_TRUE(loader.Open(filename.c_str()));
    EXPECT_TRUE(loader.Open(filename.c_str()));
    loader.CollectTokens(&tokens);
    EXPECT_EQ(3, tokens.size());
  }

  Util::Unlink(filename);
}

TEST(TextDictionaryLoaderText, LoadMultipleFilesTest) {
  const string filename1 = Util::JoinPath(FLAGS_test_tmpdir, "test1.tsv");
  const string filename2 = Util::JoinPath(FLAGS_test_tmpdir, "test2.tsv");
  const string filename = filename1 + "," + filename2;

  {
    OutputFileStream ofs(filename1.c_str());
    ofs << kTextLines;
  }

  {
    OutputFileStream ofs(filename2.c_str());
    ofs << kTextLines;
  }

  {
    TextDictionaryLoader loader;
    vector<Token *> tokens;
    EXPECT_TRUE(loader.Open(filename.c_str()));
    loader.CollectTokens(&tokens);
    EXPECT_EQ(6, tokens.size());
  }

  Util::Unlink(filename1);
  Util::Unlink(filename2);
}
}  // namespace
}  // namespace mozc