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/*  test_a_hash_map.h                                                     */
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#ifndef TEST_A_HASH_MAP_H
#define TEST_A_HASH_MAP_H

#include "core/templates/a_hash_map.h"

#include "tests/test_macros.h"

namespace TestAHashMap {

TEST_CASE("[AHashMap] List initialization") {
	AHashMap<int, String> map{ { 0, "A" }, { 1, "B" }, { 2, "C" }, { 3, "D" }, { 4, "E" } };

	CHECK(map.size() == 5);
	CHECK(map[0] == "A");
	CHECK(map[1] == "B");
	CHECK(map[2] == "C");
	CHECK(map[3] == "D");
	CHECK(map[4] == "E");
}

TEST_CASE("[AHashMap] List initialization with existing elements") {
	AHashMap<int, String> map{ { 0, "A" }, { 0, "B" }, { 0, "C" }, { 0, "D" }, { 0, "E" } };

	CHECK(map.size() == 1);
	CHECK(map[0] == "E");
}

TEST_CASE("[AHashMap] Insert element") {
	AHashMap<int, int> map;
	AHashMap<int, int>::Iterator e = map.insert(42, 84);

	CHECK(e);
	CHECK(e->key == 42);
	CHECK(e->value == 84);
	CHECK(map[42] == 84);
	CHECK(map.has(42));
	CHECK(map.find(42));
}

TEST_CASE("[AHashMap] Overwrite element") {
	AHashMap<int, int> map;
	map.insert(42, 84);
	map.insert(42, 1234);

	CHECK(map[42] == 1234);
}

TEST_CASE("[AHashMap] Erase via element") {
	AHashMap<int, int> map;
	AHashMap<int, int>::Iterator e = map.insert(42, 84);
	map.remove(e);
	CHECK(!map.has(42));
	CHECK(!map.find(42));
}

TEST_CASE("[AHashMap] Erase via key") {
	AHashMap<int, int> map;
	map.insert(42, 84);
	map.erase(42);
	CHECK(!map.has(42));
	CHECK(!map.find(42));
}

TEST_CASE("[AHashMap] Size") {
	AHashMap<int, int> map;
	map.insert(42, 84);
	map.insert(123, 84);
	map.insert(123, 84);
	map.insert(0, 84);
	map.insert(123485, 84);

	CHECK(map.size() == 4);
}

TEST_CASE("[AHashMap] Iteration") {
	AHashMap<int, int> map;

	map.insert(42, 84);
	map.insert(123, 12385);
	map.insert(0, 12934);
	map.insert(123485, 1238888);
	map.insert(123, 111111);

	Vector<Pair<int, int>> expected;
	expected.push_back(Pair<int, int>(42, 84));
	expected.push_back(Pair<int, int>(123, 111111));
	expected.push_back(Pair<int, int>(0, 12934));
	expected.push_back(Pair<int, int>(123485, 1238888));

	int idx = 0;
	for (const KeyValue<int, int> &E : map) {
		CHECK(expected[idx] == Pair<int, int>(E.key, E.value));
		idx++;
	}

	idx--;
	for (AHashMap<int, int>::Iterator it = map.last(); it; --it) {
		CHECK(expected[idx] == Pair<int, int>(it->key, it->value));
		idx--;
	}
}

TEST_CASE("[AHashMap] Const iteration") {
	AHashMap<int, int> map;
	map.insert(42, 84);
	map.insert(123, 12385);
	map.insert(0, 12934);
	map.insert(123485, 1238888);
	map.insert(123, 111111);

	const AHashMap<int, int> const_map = map;

	Vector<Pair<int, int>> expected;
	expected.push_back(Pair<int, int>(42, 84));
	expected.push_back(Pair<int, int>(123, 111111));
	expected.push_back(Pair<int, int>(0, 12934));
	expected.push_back(Pair<int, int>(123485, 1238888));
	expected.push_back(Pair<int, int>(123, 111111));

	int idx = 0;
	for (const KeyValue<int, int> &E : const_map) {
		CHECK(expected[idx] == Pair<int, int>(E.key, E.value));
		idx++;
	}

	idx--;
	for (AHashMap<int, int>::ConstIterator it = const_map.last(); it; --it) {
		CHECK(expected[idx] == Pair<int, int>(it->key, it->value));
		idx--;
	}
}

TEST_CASE("[AHashMap] Replace key") {
	AHashMap<int, int> map;
	map.insert(42, 84);
	map.insert(0, 12934);
	CHECK(map.replace_key(0, 1));
	CHECK(map.has(1));
	CHECK(map[1] == 12934);
}

TEST_CASE("[AHashMap] Clear") {
	AHashMap<int, int> map;
	map.insert(42, 84);
	map.insert(123, 12385);
	map.insert(0, 12934);

	map.clear();
	CHECK(!map.has(42));
	CHECK(map.size() == 0);
	CHECK(map.is_empty());
}

TEST_CASE("[AHashMap] Get") {
	AHashMap<int, int> map;
	map.insert(42, 84);
	map.insert(123, 12385);
	map.insert(0, 12934);

	CHECK(map.get(123) == 12385);
	map.get(123) = 10;
	CHECK(map.get(123) == 10);

	CHECK(*map.getptr(0) == 12934);
	*map.getptr(0) = 1;
	CHECK(*map.getptr(0) == 1);

	CHECK(map.get(42) == 84);
	CHECK(map.getptr(-10) == nullptr);
}

TEST_CASE("[AHashMap] Insert, iterate and remove many elements") {
	const int elem_max = 1234;
	AHashMap<int, int> map;
	for (int i = 0; i < elem_max; i++) {
		map.insert(i, i);
	}

	//insert order should have been kept
	int idx = 0;
	for (auto &K : map) {
		CHECK(idx == K.key);
		CHECK(idx == K.value);
		CHECK(map.has(idx));
		idx++;
	}

	Vector<int> elems_still_valid;

	for (int i = 0; i < elem_max; i++) {
		if ((i % 5) == 0) {
			map.erase(i);
		} else {
			elems_still_valid.push_back(i);
		}
	}

	CHECK(elems_still_valid.size() == map.size());

	for (int i = 0; i < elems_still_valid.size(); i++) {
		CHECK(map.has(elems_still_valid[i]));
	}
}

TEST_CASE("[AHashMap] Insert, iterate and remove many strings") {
	const int elem_max = 432;
	AHashMap<String, String> map;
	for (int i = 0; i < elem_max; i++) {
		map.insert(itos(i), itos(i));
	}

	//insert order should have been kept
	int idx = 0;
	for (auto &K : map) {
		CHECK(itos(idx) == K.key);
		CHECK(itos(idx) == K.value);
		CHECK(map.has(itos(idx)));
		idx++;
	}

	Vector<String> elems_still_valid;

	for (int i = 0; i < elem_max; i++) {
		if ((i % 5) == 0) {
			map.erase(itos(i));
		} else {
			elems_still_valid.push_back(itos(i));
		}
	}

	CHECK(elems_still_valid.size() == map.size());

	for (int i = 0; i < elems_still_valid.size(); i++) {
		CHECK(map.has(elems_still_valid[i]));
	}

	elems_still_valid.clear();
}

TEST_CASE("[AHashMap] Copy constructor") {
	AHashMap<int, int> map0;
	const uint32_t count = 5;
	for (uint32_t i = 0; i < count; i++) {
		map0.insert(i, i);
	}
	AHashMap<int, int> map1(map0);
	CHECK(map0.size() == map1.size());
	CHECK(map0.get_capacity() == map1.get_capacity());
	CHECK(*map0.getptr(0) == *map1.getptr(0));
}

TEST_CASE("[AHashMap] Operator =") {
	AHashMap<int, int> map0;
	AHashMap<int, int> map1;
	const uint32_t count = 5;
	map1.insert(1234, 1234);
	for (uint32_t i = 0; i < count; i++) {
		map0.insert(i, i);
	}
	map1 = map0;
	CHECK(map0.size() == map1.size());
	CHECK(map0.get_capacity() == map1.get_capacity());
	CHECK(*map0.getptr(0) == *map1.getptr(0));
}

TEST_CASE("[AHashMap] Array methods") {
	AHashMap<int, int> map;
	for (int i = 0; i < 100; i++) {
		map.insert(100 - i, i);
	}
	for (int i = 0; i < 100; i++) {
		CHECK(map.get_by_index(i).value == i);
	}
	int index = map.get_index(1);
	CHECK(map.get_by_index(index).value == 99);
	CHECK(map.erase_by_index(index));
	CHECK(!map.erase_by_index(index));
	CHECK(map.get_index(1) == -1);
}

} // namespace TestAHashMap

#endif // TEST_A_HASH_MAP_H