#include <boost/test/unit_test.hpp>
#include <fc/log/logger.hpp>

#include <fc/container/flat.hpp>
#include <fc/io/raw.hpp>
#include <fc/reflect/variant.hpp>
#include <fc/static_variant.hpp>

namespace fc { namespace test {

   struct item;
   inline bool operator == ( const item& a, const item& b );
   inline bool operator < ( const item& a, const item& b );

   struct item_wrapper
   {
      item_wrapper() {}
      item_wrapper(item&& it) { v.reserve(1); v.insert( it ); }
      boost::container::flat_set<struct item> v;
   };

   inline bool operator == ( const item_wrapper& a, const item_wrapper& b )
   { return ( std::tie( a.v ) == std::tie( b.v ) ); }
   inline bool operator < ( const item_wrapper& a, const item_wrapper& b )
   { return ( std::tie( a.v ) < std::tie( b.v ) ); }

   struct item
   {
      item(int32_t lvl = 0) : level(lvl) {}
      item(item_wrapper&& wp, int32_t lvl = 0) : level(lvl), w(wp) {}
      int32_t      level;
      item_wrapper w;
   };

   inline bool operator == ( const item& a, const item& b )
   { return ( std::tie( a.level, a.w ) == std::tie( b.level, b.w ) ); }
   inline bool operator < ( const item& a, const item& b )
   { return ( std::tie( a.level, a.w ) < std::tie( b.level, b.w ) ); }


} } // namespace fc::test

FC_REFLECT( fc::test::item_wrapper, (v) );
FC_REFLECT( fc::test::item, (level)(w) );

BOOST_AUTO_TEST_SUITE(fc_variant_and_log)

BOOST_AUTO_TEST_CASE( nested_objects_test )
{ try {

   auto create_nested_object = []( uint32_t level )
   {
      ilog( "Creating nested object with ${lv} level(s)", ("lv",level) );
      fc::test::item nested;
      for( uint32_t i = 1; i <= level; i++ )
      {
         if( i % 10 == 0 )
            ilog( "Creating level ${lv}", ("lv",i) );
         fc::test::item_wrapper wp( std::move(nested) );
         nested = fc::test::item( std::move(wp), i );
      }
      return nested;
   };

   for (int nested_loops = 0; nested_loops <= 100; ++nested_loops )
   {
      int nested_levels = nested_loops * 3 + 2;
      auto nested = create_nested_object( nested_loops );

      fc::variant v;

      BOOST_TEST_MESSAGE( "About to convert to variant." );
      BOOST_CHECK_THROW( to_variant( nested, v, nested_levels ), fc::assert_exception );
      // CAPTURE_AND_LOG should never throw again
      try { to_variant( nested, v, nested_levels ); } FC_CAPTURE_AND_LOG ( (nested) );
      to_variant( nested, v, nested_levels + 1 );

      BOOST_TEST_MESSAGE( "About to convert from variant." );
      fc::test::item unpacked;
      BOOST_CHECK_THROW( from_variant( v, unpacked, nested_levels ), fc::assert_exception );
      from_variant( v, unpacked, nested_levels + 1 );

      BOOST_CHECK( unpacked == nested );

      fc::static_variant<fc::test::item> sv( nested ), sv1;
      BOOST_TEST_MESSAGE( "About to convert static_variant to variant." );
      BOOST_CHECK_THROW( to_variant( sv, v, nested_levels + 1 ), fc::assert_exception );
      // CAPTURE_AND_LOG should never throw again
      try { to_variant( sv, v, nested_levels + 1 ); } FC_CAPTURE_AND_LOG ( (sv) );
      to_variant( sv, v, nested_levels + 2 );

      BOOST_TEST_MESSAGE( "About to convert static_variant from variant." );
      BOOST_CHECK_THROW( from_variant( v, sv1, nested_levels + 1 ), fc::assert_exception );
      from_variant( v, sv1, nested_levels + 2 );

      BOOST_CHECK( sv == sv1 );

      std::vector<fc::static_variant<fc::test::item>> vec(300), vec1;
      for( int i = 0; i < 300; i++ )
         vec.push_back(sv);
      BOOST_TEST_MESSAGE( "About to convert vector to variant." );
      BOOST_CHECK_THROW( to_variant( vec, v, nested_levels + 2 ), fc::assert_exception );
      // CAPTURE_AND_LOG should never throw again
      try { to_variant( vec, v, nested_levels + 2 ); } FC_CAPTURE_AND_LOG ( (vec) );
      to_variant( vec, v, nested_levels + 3 );

      BOOST_TEST_MESSAGE( "About to convert vector from variant." );
      BOOST_CHECK_THROW( from_variant( v, vec1, nested_levels + 2 ), fc::assert_exception );
      from_variant( v, vec1, nested_levels + 3 );

      BOOST_CHECK( vec == vec1 );

      // both log and dump should never throw
      BOOST_TEST_MESSAGE( "About to log obj." );
      ilog( "The obj is ${a}", ("a",nested) );
      BOOST_TEST_MESSAGE( "About to dump obj." );
      idump( (nested) );

      BOOST_TEST_MESSAGE( "About to log static_variant." );
      ilog( "The static_variant is ${a}", ("a",sv) );
      BOOST_TEST_MESSAGE( "About to dump static_variant." );
      idump((sv));

      BOOST_TEST_MESSAGE( "About to log vector." );
      ilog( "The vector is ${a}", ("a",vec) );
      BOOST_TEST_MESSAGE( "About to dump vector." );
      idump((vec));

   }

} FC_CAPTURE_LOG_AND_RETHROW ( (0) ) }

BOOST_AUTO_TEST_SUITE_END()