#include <graphene/peerplays_sidechain/bitcoin/bitcoin_script.hpp>
#include <graphene/peerplays_sidechain/bitcoin/serialize.hpp>

namespace graphene { namespace peerplays_sidechain { namespace bitcoin {

script_builder& script_builder::operator<<( op opcode )
{
   const auto op_byte = static_cast<uint8_t>( opcode );
   if ( op_byte < 0 || op_byte > 0xff )
      throw std::runtime_error( "script_builder::operator<<(OP): invalid opcode" );
   script.push_back( op_byte );
   return *this;
}

script_builder& script_builder::operator<<( uint32_t number )
{
   if ( number == 0 ) {
      script.push_back( static_cast<uint8_t>( op::_0 ) );
   } else if ( number <= 16) {
      script.push_back( static_cast<uint8_t>( op::_1 ) + number - 1 );
   } else {
      bytes pack_buf;
      while (number) {
         pack_buf.push_back(number & 0xff);
         number >>= 8;
      }
      // - If the most significant byte is >= 0x80 and the value is positive, push a
      // new zero-byte to make the significant byte < 0x80 again. So,  the result can
      // be 5 bytes max.
      if (pack_buf.back() & 0x80)
          pack_buf.push_back(0);
      *this << pack_buf;
   }

   return *this;
}

script_builder& script_builder::operator<<( size_t size )
{
   write_compact_size( script, size );
   return *this;
}

script_builder& script_builder::operator<<( const bytes& sc ) {
   write_compact_size( script, sc.size() );
   script.insert( script.end(), sc.begin(), sc.end() );
   return *this;
}

script_builder& script_builder::operator<<( const fc::sha256& hash )
{
   write_compact_size( script, hash.data_size() );
   script.insert( script.end(), hash.data(), hash.data() + hash.data_size() );
   return *this;
}

script_builder& script_builder::operator<<( const fc::ripemd160& hash )
{
   write_compact_size( script, hash.data_size() );
   script.insert( script.end(), hash.data(), hash.data() + hash.data_size() );
   return *this;
}

script_builder& script_builder::operator<<( const fc::ecc::public_key_data& pubkey_data )
{
   write_compact_size( script, pubkey_data.size() );
   script.insert( script.end(), pubkey_data.begin(), pubkey_data.begin() + pubkey_data.size() );
   return *this;
}

} } }