/*
 * Copyright (c) 2015, Cryptonomex, Inc.
 * All rights reserved.
 *
 * This source code is provided for evaluation in private test networks only, until September 8, 2015. After this date, this license expires and
 * the code may not be used, modified or distributed for any purpose. Redistribution and use in source and binary forms, with or without modification,
 * are permitted until September 8, 2015, provided that the following conditions are met:
 *
 * 1. The code and/or derivative works are used only for private test networks consisting of no more than 10 P2P nodes.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include <graphene/chain/database.hpp>
#include <graphene/chain/evaluator.hpp>
#include <graphene/chain/transaction_evaluation_state.hpp>
#include <graphene/chain/asset_object.hpp>
#include <graphene/chain/account_object.hpp>
#include <graphene/chain/delegate_object.hpp>
#include <graphene/chain/limit_order_object.hpp>
#include <graphene/chain/call_order_object.hpp>

#include <fc/uint128.hpp>

namespace graphene { namespace chain {
database& generic_evaluator::db()const { return trx_state->db(); }

   operation_result generic_evaluator::start_evaluate( transaction_evaluation_state& eval_state, const operation& op, bool apply )
   { try {
      trx_state   = &eval_state;
      check_required_authorities(op);
      auto result = evaluate( op );

      if( apply ) result = this->apply( op );
      return result;
   } FC_CAPTURE_AND_RETHROW() }

   void generic_evaluator::prepare_fee(account_id_type account_id, asset fee)
   {
      fee_from_account = fee;
      FC_ASSERT( fee.amount >= 0 );
      fee_paying_account = &account_id(db());
      fee_paying_account_statistics = &fee_paying_account->statistics(db());

      fee_asset = &fee.asset_id(db());
      fee_asset_dyn_data = &fee_asset->dynamic_asset_data_id(db());

      if( fee_from_account.asset_id == asset_id_type() )
         core_fee_paid = fee_from_account.amount;
      else {
         asset fee_from_pool = fee_from_account * fee_asset->options.core_exchange_rate;
         FC_ASSERT( fee_from_pool.asset_id == asset_id_type() );
         core_fee_paid = fee_from_pool.amount;
         FC_ASSERT( core_fee_paid <= fee_asset_dyn_data->fee_pool );
      }
   }

   void generic_evaluator::pay_fee()
   { try {
      if( fee_asset->get_id() != asset_id_type() )
         db().modify(*fee_asset_dyn_data, [this](asset_dynamic_data_object& d) {
            d.accumulated_fees += fee_from_account.amount;
            d.fee_pool -= core_fee_paid;
         });
      db().modify(*fee_paying_account_statistics, [&](account_statistics_object& s) {
         if( core_fee_paid > db().get_global_properties().parameters.cashback_vesting_threshold )
            s.pending_fees += core_fee_paid;
         else
            s.pending_vested_fees += core_fee_paid;
      });
   } FC_CAPTURE_AND_RETHROW() }

   bool generic_evaluator::verify_authority( const account_object& a, authority::classification c )
   { try {
       return trx_state->check_authority( a, c );
   } FC_CAPTURE_AND_RETHROW( (a)(c) ) }

   void generic_evaluator::check_required_authorities(const operation& op)
   { try {
      flat_set<account_id_type> active_auths;
      flat_set<account_id_type> owner_auths;
      vector<authority>         other_auths;

      operation_get_required_active_authorities( op, active_auths );
      operation_get_required_owner_authorities( op, owner_auths );
      operation_get_required_authorities( op, other_auths );

      for( auto id : active_auths )
         FC_ASSERT(verify_authority(id(db()), authority::active) ||
                   verify_authority(id(db()), authority::owner), "", ("id", id));

      for( auto id : owner_auths )
         FC_ASSERT(verify_authority(id(db()), authority::owner), "", ("id", id));

      for( const auto& auth : other_auths )
         FC_ASSERT(trx_state->check_authority(auth));

   } FC_CAPTURE_AND_RETHROW( (op) ) }

   void generic_evaluator::verify_authority_accounts( const authority& a )const
   {
      const auto& chain_params = db().get_global_properties().parameters;
      FC_ASSERT( a.num_auths() <= chain_params.maximum_authority_membership );
      for( const auto& acnt : a.account_auths )
         acnt.first(db());
   }

} }