// Copyright (c) 2014-2020, The Monero Project
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
// 
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers

#include "gtest/gtest.h"

#include "checkpoints/checkpoints.cpp"

using namespace cryptonote;


TEST(checkpoints_is_alternative_block_allowed, handles_empty_checkpoints)
{
  checkpoints cp;

  ASSERT_FALSE(cp.is_alternative_block_allowed(0, 0));

  ASSERT_TRUE(cp.is_alternative_block_allowed(1, 1));
  ASSERT_TRUE(cp.is_alternative_block_allowed(1, 9));
  ASSERT_TRUE(cp.is_alternative_block_allowed(9, 1));
}

TEST(checkpoints_is_alternative_block_allowed, handles_one_checkpoint)
{
  checkpoints cp;
  ASSERT_TRUE(cp.add_checkpoint(5, "0000000000000000000000000000000000000000000000000000000000000000"));

  ASSERT_FALSE(cp.is_alternative_block_allowed(0, 0));

  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 1));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 4));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 5));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 6));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 9));

  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 1));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 4));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 5));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 6));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 9));

  ASSERT_FALSE(cp.is_alternative_block_allowed(5, 1));
  ASSERT_FALSE(cp.is_alternative_block_allowed(5, 4));
  ASSERT_FALSE(cp.is_alternative_block_allowed(5, 5));
  ASSERT_TRUE (cp.is_alternative_block_allowed(5, 6));
  ASSERT_TRUE (cp.is_alternative_block_allowed(5, 9));

  ASSERT_FALSE(cp.is_alternative_block_allowed(6, 1));
  ASSERT_FALSE(cp.is_alternative_block_allowed(6, 4));
  ASSERT_FALSE(cp.is_alternative_block_allowed(6, 5));
  ASSERT_TRUE (cp.is_alternative_block_allowed(6, 6));
  ASSERT_TRUE (cp.is_alternative_block_allowed(6, 9));

  ASSERT_FALSE(cp.is_alternative_block_allowed(9, 1));
  ASSERT_FALSE(cp.is_alternative_block_allowed(9, 4));
  ASSERT_FALSE(cp.is_alternative_block_allowed(9, 5));
  ASSERT_TRUE (cp.is_alternative_block_allowed(9, 6));
  ASSERT_TRUE (cp.is_alternative_block_allowed(9, 9));
}

TEST(checkpoints_is_alternative_block_allowed, handles_two_and_more_checkpoints)
{
  checkpoints cp;
  ASSERT_TRUE(cp.add_checkpoint(5, "0000000000000000000000000000000000000000000000000000000000000000"));
  ASSERT_TRUE(cp.add_checkpoint(9, "0000000000000000000000000000000000000000000000000000000000000000"));

  ASSERT_FALSE(cp.is_alternative_block_allowed(0, 0));

  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 1));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 4));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 5));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 6));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 8));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 9));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 10));
  ASSERT_TRUE (cp.is_alternative_block_allowed(1, 11));

  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 1));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 4));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 5));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 6));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 8));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 9));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 10));
  ASSERT_TRUE (cp.is_alternative_block_allowed(4, 11));

  ASSERT_FALSE(cp.is_alternative_block_allowed(5, 1));
  ASSERT_FALSE(cp.is_alternative_block_allowed(5, 4));
  ASSERT_FALSE(cp.is_alternative_block_allowed(5, 5));
  ASSERT_TRUE (cp.is_alternative_block_allowed(5, 6));
  ASSERT_TRUE (cp.is_alternative_block_allowed(5, 8));
  ASSERT_TRUE (cp.is_alternative_block_allowed(5, 9));
  ASSERT_TRUE (cp.is_alternative_block_allowed(5, 10));
  ASSERT_TRUE (cp.is_alternative_block_allowed(5, 11));

  ASSERT_FALSE(cp.is_alternative_block_allowed(6, 1));
  ASSERT_FALSE(cp.is_alternative_block_allowed(6, 4));
  ASSERT_FALSE(cp.is_alternative_block_allowed(6, 5));
  ASSERT_TRUE (cp.is_alternative_block_allowed(6, 6));
  ASSERT_TRUE (cp.is_alternative_block_allowed(6, 8));
  ASSERT_TRUE (cp.is_alternative_block_allowed(6, 9));
  ASSERT_TRUE (cp.is_alternative_block_allowed(6, 10));
  ASSERT_TRUE (cp.is_alternative_block_allowed(6, 11));

  ASSERT_FALSE(cp.is_alternative_block_allowed(8, 1));
  ASSERT_FALSE(cp.is_alternative_block_allowed(8, 4));
  ASSERT_FALSE(cp.is_alternative_block_allowed(8, 5));
  ASSERT_TRUE (cp.is_alternative_block_allowed(8, 6));
  ASSERT_TRUE (cp.is_alternative_block_allowed(8, 8));
  ASSERT_TRUE (cp.is_alternative_block_allowed(8, 9));
  ASSERT_TRUE (cp.is_alternative_block_allowed(8, 10));
  ASSERT_TRUE (cp.is_alternative_block_allowed(8, 11));

  ASSERT_FALSE(cp.is_alternative_block_allowed(9, 1));
  ASSERT_FALSE(cp.is_alternative_block_allowed(9, 4));
  ASSERT_FALSE(cp.is_alternative_block_allowed(9, 5));
  ASSERT_FALSE(cp.is_alternative_block_allowed(9, 6));
  ASSERT_FALSE(cp.is_alternative_block_allowed(9, 8));
  ASSERT_FALSE(cp.is_alternative_block_allowed(9, 9));
  ASSERT_TRUE (cp.is_alternative_block_allowed(9, 10));
  ASSERT_TRUE (cp.is_alternative_block_allowed(9, 11));

  ASSERT_FALSE(cp.is_alternative_block_allowed(10, 1));
  ASSERT_FALSE(cp.is_alternative_block_allowed(10, 4));
  ASSERT_FALSE(cp.is_alternative_block_allowed(10, 5));
  ASSERT_FALSE(cp.is_alternative_block_allowed(10, 6));
  ASSERT_FALSE(cp.is_alternative_block_allowed(10, 8));
  ASSERT_FALSE(cp.is_alternative_block_allowed(10, 9));
  ASSERT_TRUE (cp.is_alternative_block_allowed(10, 10));
  ASSERT_TRUE (cp.is_alternative_block_allowed(10, 11));

  ASSERT_FALSE(cp.is_alternative_block_allowed(11, 1));
  ASSERT_FALSE(cp.is_alternative_block_allowed(11, 4));
  ASSERT_FALSE(cp.is_alternative_block_allowed(11, 5));
  ASSERT_FALSE(cp.is_alternative_block_allowed(11, 6));
  ASSERT_FALSE(cp.is_alternative_block_allowed(11, 8));
  ASSERT_FALSE(cp.is_alternative_block_allowed(11, 9));
  ASSERT_TRUE (cp.is_alternative_block_allowed(11, 10));
  ASSERT_TRUE (cp.is_alternative_block_allowed(11, 11));
}
