#include <catch2/catch_test_macros.hpp>

#include "matador/utils/result.hpp"

namespace matador::test {

enum class math_error : int32_t {
  DIVISION_BY_ZERO = 1
};

utils::result<float, math_error>divide(int x, int y) {
  if (y == 0) {
    return utils::error(math_error::DIVISION_BY_ZERO);
  }

  return utils::ok(float(x) / y);
}

utils::result<float, math_error>multiply(int x, int y) {
  return utils::ok(float(x) * y);
}

}

using namespace matador;

TEST_CASE("Result tests", "[result]") {
  auto res = test::divide(4, 2);
  REQUIRE(res);
  REQUIRE(res.is_ok());
  REQUIRE(!res.is_error());

  REQUIRE((res.value() == 2.0));

  REQUIRE_THROWS(res.err());

  res = test::divide(4, 0);
  REQUIRE(!res);
  REQUIRE(!res.is_ok());
  REQUIRE(res.is_error());

  REQUIRE((res.err() == test::math_error::DIVISION_BY_ZERO));


//  res = test::divide(4, 2)
//    .and_then<>()
}