//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
//  This source code is licensed under both the GPLv2 (found in the
//  COPYING file in the root directory) and Apache 2.0 License
//  (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.

#include "util/filename.h"

#include "db/dbformat.h"
#include "port/port.h"
#include "util/logging.h"
#include "util/testharness.h"

namespace rocksdb {

class FileNameTest : public testing::Test {};

TEST_F(FileNameTest, Parse) {
  Slice db;
  FileType type;
  uint64_t number;

  char kDefautInfoLogDir = 1;
  char kDifferentInfoLogDir = 2;
  char kNoCheckLogDir = 4;
  char kAllMode = kDefautInfoLogDir | kDifferentInfoLogDir | kNoCheckLogDir;

  // Successful parses
  static struct {
    const char* fname;
    uint64_t number;
    FileType type;
    char mode;
  } cases[] = {
        {"100.log", 100, kLogFile, kAllMode},
        {"0.log", 0, kLogFile, kAllMode},
        {"0.sst", 0, kTableFile, kAllMode},
        {"CURRENT", 0, kCurrentFile, kAllMode},
        {"LOCK", 0, kDBLockFile, kAllMode},
        {"MANIFEST-2", 2, kDescriptorFile, kAllMode},
        {"MANIFEST-7", 7, kDescriptorFile, kAllMode},
        {"METADB-2", 2, kMetaDatabase, kAllMode},
        {"METADB-7", 7, kMetaDatabase, kAllMode},
        {"LOG", 0, kInfoLogFile, kDefautInfoLogDir},
        {"LOG.old", 0, kInfoLogFile, kDefautInfoLogDir},
        {"LOG.old.6688", 6688, kInfoLogFile, kDefautInfoLogDir},
        {"rocksdb_dir_LOG", 0, kInfoLogFile, kDifferentInfoLogDir},
        {"rocksdb_dir_LOG.old", 0, kInfoLogFile, kDifferentInfoLogDir},
        {"rocksdb_dir_LOG.old.6688", 6688, kInfoLogFile, kDifferentInfoLogDir},
        {"18446744073709551615.log", 18446744073709551615ull, kLogFile,
         kAllMode}, };
  for (char mode : {kDifferentInfoLogDir, kDefautInfoLogDir, kNoCheckLogDir}) {
    for (unsigned int i = 0; i < sizeof(cases) / sizeof(cases[0]); i++) {
      InfoLogPrefix info_log_prefix(mode != kDefautInfoLogDir, "/rocksdb/dir");
      if (cases[i].mode & mode) {
        std::string f = cases[i].fname;
        if (mode == kNoCheckLogDir) {
          ASSERT_TRUE(ParseFileName(f, &number, &type)) << f;
        } else {
          ASSERT_TRUE(ParseFileName(f, &number, info_log_prefix.prefix, &type))
              << f;
        }
        ASSERT_EQ(cases[i].type, type) << f;
        ASSERT_EQ(cases[i].number, number) << f;
      }
    }
  }

  // Errors
  static const char* errors[] = {
    "",
    "foo",
    "foo-dx-100.log",
    ".log",
    "",
    "manifest",
    "CURREN",
    "CURRENTX",
    "MANIFES",
    "MANIFEST",
    "MANIFEST-",
    "XMANIFEST-3",
    "MANIFEST-3x",
    "META",
    "METADB",
    "METADB-",
    "XMETADB-3",
    "METADB-3x",
    "LOC",
    "LOCKx",
    "LO",
    "LOGx",
    "18446744073709551616.log",
    "184467440737095516150.log",
    "100",
    "100.",
    "100.lop"
  };
  for (unsigned int i = 0; i < sizeof(errors) / sizeof(errors[0]); i++) {
    std::string f = errors[i];
    ASSERT_TRUE(!ParseFileName(f, &number, &type)) << f;
  };
}

TEST_F(FileNameTest, InfoLogFileName) {
  std::string dbname = ("/data/rocksdb");
  std::string db_absolute_path;
  Env::Default()->GetAbsolutePath(dbname, &db_absolute_path);

  ASSERT_EQ("/data/rocksdb/LOG", InfoLogFileName(dbname, db_absolute_path, ""));
  ASSERT_EQ("/data/rocksdb/LOG.old.666",
            OldInfoLogFileName(dbname, 666u, db_absolute_path, ""));

  ASSERT_EQ("/data/rocksdb_log/data_rocksdb_LOG",
            InfoLogFileName(dbname, db_absolute_path, "/data/rocksdb_log"));
  ASSERT_EQ(
      "/data/rocksdb_log/data_rocksdb_LOG.old.666",
      OldInfoLogFileName(dbname, 666u, db_absolute_path, "/data/rocksdb_log"));
}

TEST_F(FileNameTest, Construction) {
  uint64_t number;
  FileType type;
  std::string fname;

  fname = CurrentFileName("foo");
  ASSERT_EQ("foo/", std::string(fname.data(), 4));
  ASSERT_TRUE(ParseFileName(fname.c_str() + 4, &number, &type));
  ASSERT_EQ(0U, number);
  ASSERT_EQ(kCurrentFile, type);

  fname = LockFileName("foo");
  ASSERT_EQ("foo/", std::string(fname.data(), 4));
  ASSERT_TRUE(ParseFileName(fname.c_str() + 4, &number, &type));
  ASSERT_EQ(0U, number);
  ASSERT_EQ(kDBLockFile, type);

  fname = LogFileName("foo", 192);
  ASSERT_EQ("foo/", std::string(fname.data(), 4));
  ASSERT_TRUE(ParseFileName(fname.c_str() + 4, &number, &type));
  ASSERT_EQ(192U, number);
  ASSERT_EQ(kLogFile, type);

  fname = TableFileName({DbPath("bar", 0)}, 200, 0);
  std::string fname1 =
      TableFileName({DbPath("foo", 0), DbPath("bar", 0)}, 200, 1);
  ASSERT_EQ(fname, fname1);
  ASSERT_EQ("bar/", std::string(fname.data(), 4));
  ASSERT_TRUE(ParseFileName(fname.c_str() + 4, &number, &type));
  ASSERT_EQ(200U, number);
  ASSERT_EQ(kTableFile, type);

  fname = DescriptorFileName("bar", 100);
  ASSERT_EQ("bar/", std::string(fname.data(), 4));
  ASSERT_TRUE(ParseFileName(fname.c_str() + 4, &number, &type));
  ASSERT_EQ(100U, number);
  ASSERT_EQ(kDescriptorFile, type);

  fname = TempFileName("tmp", 999);
  ASSERT_EQ("tmp/", std::string(fname.data(), 4));
  ASSERT_TRUE(ParseFileName(fname.c_str() + 4, &number, &type));
  ASSERT_EQ(999U, number);
  ASSERT_EQ(kTempFile, type);

  fname = MetaDatabaseName("met", 100);
  ASSERT_EQ("met/", std::string(fname.data(), 4));
  ASSERT_TRUE(ParseFileName(fname.c_str() + 4, &number, &type));
  ASSERT_EQ(100U, number);
  ASSERT_EQ(kMetaDatabase, type);
}

}  // namespace rocksdb

int main(int argc, char** argv) {
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}