/* SPDX-License-Identifier: Apache-2.0 */

#include "BLI_exception_safety_test_utils.hh"
#include "BLI_strict_flags.h"
#include "BLI_vector_set.hh"
#include "testing/testing.h"

namespace blender::tests {

TEST(vector_set, DefaultConstructor)
{
  VectorSet<int> set;
  EXPECT_EQ(set.size(), 0);
  EXPECT_TRUE(set.is_empty());
}

TEST(vector_set, InitializerListConstructor_WithoutDuplicates)
{
  VectorSet<int> set = {1, 4, 5};
  EXPECT_EQ(set.size(), 3);
  EXPECT_EQ(set[0], 1);
  EXPECT_EQ(set[1], 4);
  EXPECT_EQ(set[2], 5);
}

TEST(vector_set, InitializerListConstructor_WithDuplicates)
{
  VectorSet<int> set = {1, 3, 3, 2, 1, 5};
  EXPECT_EQ(set.size(), 4);
  EXPECT_EQ(set[0], 1);
  EXPECT_EQ(set[1], 3);
  EXPECT_EQ(set[2], 2);
  EXPECT_EQ(set[3], 5);
}

TEST(vector_set, Copy)
{
  VectorSet<int> set1 = {1, 2, 3};
  VectorSet<int> set2 = set1;
  EXPECT_EQ(set1.size(), 3);
  EXPECT_EQ(set2.size(), 3);
  EXPECT_EQ(set1.index_of(2), 1);
  EXPECT_EQ(set2.index_of(2), 1);
}

TEST(vector_set, CopyAssignment)
{
  VectorSet<int> set1 = {1, 2, 3};
  VectorSet<int> set2 = {};
  set2 = set1;
  EXPECT_EQ(set1.size(), 3);
  EXPECT_EQ(set2.size(), 3);
  EXPECT_EQ(set1.index_of(2), 1);
  EXPECT_EQ(set2.index_of(2), 1);
}

TEST(vector_set, Move)
{
  VectorSet<int> set1 = {1, 2, 3};
  VectorSet<int> set2 = std::move(set1);
  EXPECT_EQ(set1.size(), 0); /* NOLINT: bugprone-use-after-move */
  EXPECT_EQ(set2.size(), 3);
}

TEST(vector_set, MoveAssignment)
{
  VectorSet<int> set1 = {1, 2, 3};
  VectorSet<int> set2 = {};
  set2 = std::move(set1);
  EXPECT_EQ(set1.size(), 0); /* NOLINT: bugprone-use-after-move */
  EXPECT_EQ(set2.size(), 3);
}

TEST(vector_set, AddNewIncreasesSize)
{
  VectorSet<int> set;
  EXPECT_TRUE(set.is_empty());
  EXPECT_EQ(set.size(), 0);
  set.add(5);
  EXPECT_FALSE(set.is_empty());
  EXPECT_EQ(set.size(), 1);
}

TEST(vector_set, AddExistingDoesNotIncreaseSize)
{
  VectorSet<int> set;
  EXPECT_EQ(set.size(), 0);
  EXPECT_TRUE(set.add(5));
  EXPECT_EQ(set.size(), 1);
  EXPECT_FALSE(set.add(5));
  EXPECT_EQ(set.size(), 1);
}

TEST(vector_set, Index)
{
  VectorSet<int> set = {3, 6, 4};
  EXPECT_EQ(set.index_of(6), 1);
  EXPECT_EQ(set.index_of(3), 0);
  EXPECT_EQ(set.index_of(4), 2);
}

TEST(vector_set, IndexTry)
{
  VectorSet<int> set = {3, 6, 4};
  EXPECT_EQ(set.index_of_try(5), -1);
  EXPECT_EQ(set.index_of_try(3), 0);
  EXPECT_EQ(set.index_of_try(6), 1);
  EXPECT_EQ(set.index_of_try(2), -1);
}

TEST(vector_set, RemoveContained)
{
  VectorSet<int> set = {4, 5, 6, 7};
  EXPECT_EQ(set.size(), 4);
  set.remove_contained(5);
  EXPECT_EQ(set.size(), 3);
  EXPECT_EQ(set[0], 4);
  EXPECT_EQ(set[1], 7);
  EXPECT_EQ(set[2], 6);
  set.remove_contained(6);
  EXPECT_EQ(set.size(), 2);
  EXPECT_EQ(set[0], 4);
  EXPECT_EQ(set[1], 7);
  set.remove_contained(4);
  EXPECT_EQ(set.size(), 1);
  EXPECT_EQ(set[0], 7);
  set.remove_contained(7);
  EXPECT_EQ(set.size(), 0);
}

TEST(vector_set, RemoveIf)
{
  VectorSet<int64_t> set;
  for (const int64_t i : IndexRange(100)) {
    set.add(i * i);
  }
  set.remove_if([](const int64_t key) { return key % 2 == 0; });
  EXPECT_EQ(set.size(), 50);
  for (const int64_t i : IndexRange(100)) {
    EXPECT_EQ(set.contains(i * i), i % 2 == 1);
  }
}

TEST(vector_set, AddMultipleTimes)
{
  VectorSet<int> set;
  for (int i = 0; i < 100; i++) {
    EXPECT_FALSE(set.contains(i * 13));
    set.add(i * 12);
    set.add(i * 13);
    EXPECT_TRUE(set.contains(i * 13));
  }
}

TEST(vector_set, UniquePtrValue)
{
  VectorSet<std::unique_ptr<int>> set;
  set.add_new(std::make_unique<int>());
  set.add(std::make_unique<int>());
  set.index_of_try(std::make_unique<int>());
  std::unique_ptr<int> value = set.pop();
  UNUSED_VARS(value);
}

TEST(vector_set, Remove)
{
  VectorSet<int> set;
  EXPECT_TRUE(set.add(5));
  EXPECT_TRUE(set.contains(5));
  EXPECT_FALSE(set.remove(6));
  EXPECT_TRUE(set.contains(5));
  EXPECT_TRUE(set.remove(5));
  EXPECT_FALSE(set.contains(5));
  EXPECT_FALSE(set.remove(5));
  EXPECT_FALSE(set.contains(5));
}

TEST(vector_set, SpanConstructorExceptions)
{
  std::array<ExceptionThrower, 5> array = {1, 2, 3, 4, 5};
  array[3].throw_during_copy = true;
  Span<ExceptionThrower> span = array;

  EXPECT_ANY_THROW({ VectorSet<ExceptionThrower> set(span); });
}

TEST(vector_set, CopyConstructorExceptions)
{
  VectorSet<ExceptionThrower> set = {1, 2, 3, 4, 5};
  set[3].throw_during_copy = true;

  EXPECT_ANY_THROW({ VectorSet<ExceptionThrower> set_copy(set); });
}

TEST(vector_set, MoveConstructorExceptions)
{
  VectorSet<ExceptionThrower> set = {1, 2, 3, 4, 5};
  set[3].throw_during_copy = true;
  set[3].throw_during_move = true;
  /* Currently never throws on move, because values are separately allocated. */
  VectorSet<ExceptionThrower> set_moved(std::move(set));
  EXPECT_EQ(set.size(), 0); /* NOLINT: bugprone-use-after-move */
  set.add_multiple({4, 5, 6, 7, 8});
  EXPECT_EQ(set.size(), 5);
}

TEST(vector_set, AddNewExceptions)
{
  VectorSet<ExceptionThrower> set;
  ExceptionThrower value;
  value.throw_during_copy = true;
  EXPECT_ANY_THROW({ set.add_new(value); });
  EXPECT_EQ(set.size(), 0);
  EXPECT_ANY_THROW({ set.add_new(value); });
  EXPECT_EQ(set.size(), 0);
}

TEST(vector_set, AddExceptions)
{
  VectorSet<ExceptionThrower> set;
  ExceptionThrower value;
  value.throw_during_copy = true;
  EXPECT_ANY_THROW({ set.add(value); });
  EXPECT_EQ(set.size(), 0);
  EXPECT_ANY_THROW({ set.add(value); });
  EXPECT_EQ(set.size(), 0);
}

TEST(vector_set, ReserveExceptions)
{
  VectorSet<ExceptionThrower> set;
  set.add_multiple({1, 2, 3, 4, 5});
  set[2].throw_during_move = true;
  EXPECT_ANY_THROW({ set.reserve(100); });
}

TEST(vector_set, PopExceptions)
{
  VectorSet<ExceptionThrower> set = {1, 2, 3};
  set.as_span().last().throw_during_move = true;
  EXPECT_EQ(set.size(), 3);
  EXPECT_ANY_THROW({ set.pop(); }); /* NOLINT: bugprone-throw-keyword-missing */
  EXPECT_EQ(set.size(), 3);
  set.add(10);
  EXPECT_EQ(set.size(), 4);
}

TEST(vector_set, IndexOfOrAdd)
{
  VectorSet<int> set;
  EXPECT_EQ(set.index_of_or_add(3), 0);
  EXPECT_EQ(set.index_of_or_add(3), 0);
  EXPECT_EQ(set.index_of_or_add(2), 1);
  EXPECT_EQ(set.index_of_or_add(0), 2);
  EXPECT_EQ(set.index_of_or_add(2), 1);
  EXPECT_EQ(set.index_of_or_add(3), 0);
  EXPECT_EQ(set.index_of_or_add(5), 3);
  EXPECT_EQ(set.index_of_or_add(8), 4);
  EXPECT_EQ(set.index_of_or_add(5), 3);
}

TEST(vector_set, Clear)
{
  VectorSet<int> set = {4, 6, 2, 4};
  EXPECT_EQ(set.size(), 3);
  set.clear();
  EXPECT_EQ(set.size(), 0);
  set.add_multiple({4, 1, 6, 8, 3, 6, 9, 3});
  EXPECT_EQ(set.size(), 6);
  set.clear();
  EXPECT_EQ(set.size(), 0);
}

TEST(vector_set, LookupKey)
{
  VectorSet<std::string> set;
  set.add("a");
  set.add("b");
  set.add("c");
  EXPECT_EQ(set.lookup_key("a"), "a");
  EXPECT_EQ(set.lookup_key_as("c"), "c");
  EXPECT_EQ(set.lookup_key_ptr_as("d"), nullptr);
  EXPECT_EQ(set.lookup_key_ptr_as("b")->size(), 1);
  EXPECT_EQ(set.lookup_key_ptr("a"), set.lookup_key_ptr_as("a"));
}

TEST(vector_set, GrowWhenEmpty)
{
  /* Tests that the internal keys array is freed correctly when growing an empty set. */
  VectorSet<int> set;
  set.add(4);
  set.remove(4);
  EXPECT_TRUE(set.is_empty());
  set.reserve(100);
}

}  // namespace blender::tests