/*----------------------------------------------------------------------------
 *
 *   Copyright (C) 2021 Antonio Augusto Alves Junior
 *
 *   This file is part of RandomIterator.
 *
 *   RandomIterator is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   RandomIterator 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.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with RandomIterator.  If not, see <http://www.gnu.org/licenses/>.
 *
 *---------------------------------------------------------------------------*/
/*
 * testing.cpp
 *
 *  Created on: 25/02/2021
 *      Author: Antonio Augusto Alves Junior
 */


#define CATCH_CONFIG_MAIN  // This tells Catch to provide a main() - only do this in one cpp file
#define CATCH_CONFIG_ENABLE_BENCHMARKING
#include <catch.hpp>

#include <cstdio>
#include <cstdint>

//hydra
#include <random_iterator/Stream.hpp>
#include <random>

//set a global seed
static const uint64_t default_seed= 0x548c9decbce65295  ;

#define NSTREAMS 1024
#define NCHECKS  1024

TEST_CASE("Streams correctness") {

SECTION( "[ random_iterator::squares3_128 ] Random test different streams produces different sequences." )
{
    INFO("Checking streams");

    std::random_device            rd{};
    std::mt19937    stream_index(rd());
	std::mt19937_64 number_index(rd());

	random_iterator::squares3_128 RNG(default_seed);

	std::uniform_int_distribution<uint64_t> dist(RNG.min(), RNG.max());

	for(size_t i=0; i<NSTREAMS; ++i ) //loop stream
	{
		uint32_t index_stream_a = stream_index();
		uint32_t index_stream_b = stream_index();

		auto stream_A = random_iterator::make_stream( dist, RNG , index_stream_a );
		auto stream_B = random_iterator::make_stream( dist, RNG , index_stream_b );

		INFO("Streams A: " << index_stream_a << " B: " <<  index_stream_b);

		for(size_t j=0; j<NCHECKS; ++j ) //loop sequence
		{
			uint64_t index = number_index();
			INFO("Index: " << j  );
		    CHECK( stream_A[j] != stream_B[j]);

		}
	}

}//SECTION( "[ random_iterator::squares3_128 ] Random test different streams produces different sequences." )


SECTION( "[ random_iterator::squares4_128 ] Random test different streams produces different sequences." )
{
    INFO("Checking streams");

    std::random_device            rd{};
    std::mt19937    stream_index(rd());
	std::mt19937_64 number_index(rd());

	random_iterator::squares4_128 RNG(default_seed);

	std::uniform_int_distribution<uint64_t> dist(RNG.min(), RNG.max());

	for(size_t i=0; i<NSTREAMS; ++i ) //loop stream
	{
		uint32_t index_stream_a = stream_index();
		uint32_t index_stream_b = stream_index();

		auto stream_A = random_iterator::make_stream( dist, RNG , index_stream_a );
		auto stream_B = random_iterator::make_stream( dist, RNG , index_stream_b );

		INFO("Streams A: " << index_stream_a << " B: " <<  index_stream_b);

		for(size_t j=0; j<NCHECKS; ++j ) //loop sequence
		{
			uint64_t index = number_index();
			INFO("Index: " << j  );
		    CHECK( stream_A[j] != stream_B[j]);

		}
	}

}//SECTION( "[ random_iterator::squares4_128 ] Random test different streams produces different sequences." )


SECTION( "[ random_iterator::philox ] Random test different streams produces different sequences." )
{
    INFO("Checking streams");

    std::random_device            rd{};
    std::mt19937    stream_index(rd());
	std::mt19937_64 number_index(rd());

	random_iterator::philox RNG(default_seed);

	std::uniform_int_distribution<uint64_t> dist(RNG.min(), RNG.max());

	for(size_t i=0; i<NSTREAMS; ++i ) //loop stream
	{
		uint32_t index_stream_a = stream_index();
		uint32_t index_stream_b = stream_index();

		auto stream_A = random_iterator::make_stream( dist, RNG , index_stream_a );
		auto stream_B = random_iterator::make_stream( dist, RNG , index_stream_b );

		INFO("Streams A: " << index_stream_a << " B: " <<  index_stream_b);

		for(size_t j=0; j<NCHECKS; ++j ) //loop sequence
		{
			uint64_t index = number_index();
			INFO("Index: " << j  );
		    CHECK( stream_A[j] != stream_B[j]);

		}
	}

}//SECTION( "[ random_iterator::philox ] Random test different streams produces different sequences." )

SECTION( "[ random_iterator::threefry ] Random test different streams produces different sequences." )
{
    INFO("Checking streams");

    std::random_device            rd{};
    std::mt19937    stream_index(rd());
	std::mt19937_64 number_index(rd());

	random_iterator::threefry RNG(default_seed);

	std::uniform_int_distribution<uint64_t> dist(RNG.min(), RNG.max());

	for(size_t i=0; i<NSTREAMS; ++i ) //loop stream
	{
		uint32_t index_stream_a = stream_index();
		uint32_t index_stream_b = stream_index();

		auto stream_A = random_iterator::make_stream( dist, RNG , index_stream_a );
		auto stream_B = random_iterator::make_stream( dist, RNG , index_stream_b );

		INFO("Streams A: " << index_stream_a << " B: " <<  index_stream_b);

		for(size_t j=0; j<NCHECKS; ++j ) //loop sequence
		{
			uint64_t index = number_index();
			INFO("Index: " << j  );
		    CHECK( stream_A[j] != stream_B[j]);

		}
	}

}//SECTION( "[ random_iterator::threefry ] Random test different streams produces different sequences." )

SECTION( "[ random_iterator::ars ] Random test different streams produces different sequences." )
{
    INFO("Checking streams");

    std::random_device            rd{};
    std::mt19937    stream_index(rd());
	std::mt19937_64 number_index(rd());

	random_iterator::ars RNG(default_seed);

	std::uniform_int_distribution<uint64_t> dist(RNG.min(), RNG.max());

	for(size_t i=0; i<NSTREAMS; ++i ) //loop stream
	{
		uint32_t index_stream_a = stream_index();
		uint32_t index_stream_b = stream_index();

		auto stream_A = random_iterator::make_stream( dist, RNG , index_stream_a );
		auto stream_B = random_iterator::make_stream( dist, RNG , index_stream_b );

		INFO("Streams A: " << index_stream_a << " B: " <<  index_stream_b);

		for(size_t j=0; j<NCHECKS; ++j ) //loop sequence
		{
			uint64_t index = number_index();
			INFO("Index: " << j  );
		    CHECK( stream_A[j] != stream_B[j]);

		}
	}

}//SECTION( "[ random_iterator::ars ] Random test different streams produces different sequences." )

}//TEST_CASE("Streams correctness")