//
// Copyright (c) 2012-2020 Kris Jusiak (kris at jusiak dot net)
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
//<-
#include <boost/di.hpp>
#include <cassert>
#include <memory>
#include <type_traits>

namespace di = boost::di;

struct i1 {
  virtual ~i1() noexcept = default;
  virtual void dummy1() = 0;
};
struct i2 {
  virtual ~i2() noexcept = default;
  virtual void dummy2() = 0;
};
struct impl1 : i1 {
  void dummy1() override {}
};
struct impl2 : i2 {
  void dummy2() override {}
};
struct impl : i1, i2 {
  void dummy1() override {}
  void dummy2() override {}
};
//->

int main() {
  auto l = 42l;
  auto b = false;
  // clang-format off
  auto injector = di::make_injector(
    di::bind<int>().to(0)
  , di::bind<int>().to(42)[di::override]
  , di::bind<i1>().to(std::make_shared<impl>())
  , di::bind<long>().to(l)
  , di::bind<short>().to([] { return 87; })
  , di::bind<i2>().to([&](const auto& injector) -> std::shared_ptr<i2> {
      return b ? injector.template create<std::shared_ptr<impl2>>() : nullptr; })
  );
  // clang-format on

  assert(42 == injector.create<int>());
  assert(injector.create<std::shared_ptr<i1>>() == injector.create<std::shared_ptr<i1>>());
  assert(l == injector.create<long&>());
  assert(&l == &injector.create<long&>());
  assert(87 == injector.create<short>());
  {
    auto object = injector.create<std::shared_ptr<i2>>();
    assert(nullptr == object);
  }
  {
    b = true;
    auto object = injector.create<std::shared_ptr<i2>>();
    assert(dynamic_cast<impl2*>(object.get()));
  }
}