/*
 * @project      The CERN Tape Archive (CTA)
 * @copyright    Copyright © 2021-2022 CERN
 * @license      This program is free software, distributed under the terms of the GNU General Public
 *               Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING". You can
 *               redistribute it and/or modify it under the terms of the GPL Version 3, or (at your
 *               option) any later version.
 *
 *               This program is distributed in the hope that it will be useful, but WITHOUT ANY
 *               WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 *               PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 *               In applying this licence, CERN does not waive the privileges and immunities
 *               granted to it by virtue of its status as an Intergovernmental Organization or
 *               submit itself to any jurisdiction.
 */

#include <gtest/gtest.h>
#include <gmock/gmock.h>
#include <gmock/gmock-cardinalities.h>
#include "Regex.hpp"

using ::testing::AtLeast;
using ::testing::Return;
using ::testing::_;

namespace unitTests {

TEST(Regex, BasicFunctionality) {
  cta::utils::Regex re("a(b)");
  std::vector<std::string> ret1, ret2;
  ret1 = re.exec("1abc");
  ret2 = re.exec("xyz");

  ASSERT_EQ(ret1.size(), 2U);
  ASSERT_EQ(ret1[0], "ab");
  ASSERT_EQ(ret1[1], "b");
  ASSERT_EQ(ret2.size(), 0U);
}

TEST(Regex, OperationalTest) {
  cta::utils::Regex re("^scsi_tape:(st[[:digit:]]+)$");
  std::vector<std::string> ret1, ret2, ret3;
  ret1 = re.exec("scsi_tape:st1");
  ret2 = re.exec("scsi_tape:st124");
  ret3 = re.exec("scsi_tape:st1a");

  ASSERT_EQ(ret1.size(), 2U);
  ASSERT_EQ(ret1[0], "scsi_tape:st1");
  ASSERT_EQ(ret1[1], "st1");
  ASSERT_EQ(ret2.size(), 2U);
  ASSERT_EQ(ret2[0], "scsi_tape:st124");
  ASSERT_EQ(ret2[1], "st124");
  ASSERT_EQ(ret3.size(), 0U);
}

 
TEST(Regex, SubstringMatch) {
  cta::utils::Regex re("^radosstriper:///([^:]+@[^:]+):(.*)$");
  std::vector<std::string> ret1;
  ret1 = re.exec("radosstriper:///user@pool:12345@castorns.7890");

  ASSERT_EQ(ret1.size(), 3U);
  ASSERT_EQ(ret1[1], "user@pool");
  ASSERT_EQ(ret1[2], "12345@castorns.7890");
}

TEST(Regex, NestedMatch) {
  cta::utils::Regex re("^rados://([^@]+)@([^:]+)(|:(.+))$");
  auto ret1 = re.exec("rados://user@pool:namespace");

  ASSERT_EQ(5U, ret1.size());
  ASSERT_EQ("user", ret1[1]);
  ASSERT_EQ("pool", ret1[2]);
  ASSERT_EQ("namespace", ret1[4]);
  
  // The nested match does not show up in the result set if its branch is not met.
  ret1 = re.exec("rados://user1@pool2");
  ASSERT_EQ(4U, ret1.size());
  ASSERT_EQ("user1", ret1[1]);
  ASSERT_EQ("pool2", ret1[2]);
  ASSERT_EQ("", ret1[3]);
}
}