path: root/src/openvic-simulation/dataloader/NodeTools.cpp

#include "NodeTools.hpp"

using namespace OpenVic;
using namespace OpenVic::NodeTools;

template<typename T>
static NodeCallback auto _expect_type(Callback<T const&> auto callback) {
   return [callback](ast::NodeCPtr node) -> bool {
      if (node != nullptr) {
         T const* cast_node = node->cast_to<T>();
         if (cast_node != nullptr) {
            return callback(*cast_node);
         }
         Logger::error("Invalid node type ", node->get_type(), " when expecting ", T::get_type_static());
      } else {
         Logger::error("Null node when expecting ", T::get_type_static());
      }
      return false;
   };
}

template<std::derived_from<ast::AbstractStringNode> T>
static Callback<T const&> auto _abstract_string_node_callback(Callback<std::string_view> auto callback, bool allow_empty) {
   return [callback, allow_empty](T const& node) -> bool {
      if (allow_empty) {
         return callback(node._name);
      } else {
         if (!node._name.empty()) {
            return callback(node._name);
         } else {
            Logger::error("Invalid string value - empty!");
            return false;
         }
      }
   };
}

node_callback_t NodeTools::expect_identifier(callback_t<std::string_view> callback) {
   return _expect_type<ast::IdentifierNode>(_abstract_string_node_callback<ast::IdentifierNode>(callback, false));
}

node_callback_t NodeTools::expect_string(callback_t<std::string_view> callback, bool allow_empty) {
   return _expect_type<ast::StringNode>(_abstract_string_node_callback<ast::StringNode>(callback, allow_empty));
}

node_callback_t NodeTools::expect_identifier_or_string(callback_t<std::string_view> callback, bool allow_empty) {
   return [callback, allow_empty](ast::NodeCPtr node) -> bool {
      if (node != nullptr) {
         ast::AbstractStringNode const* cast_node = node->cast_to<ast::IdentifierNode>();
         if (cast_node == nullptr) {
            cast_node = node->cast_to<ast::StringNode>();
         }
         if (cast_node != nullptr) {
            return _abstract_string_node_callback<ast::AbstractStringNode>(callback, allow_empty)(*cast_node);
         }
         Logger::error("Invalid node type ", node->get_type(), " when expecting ", ast::IdentifierNode::get_type_static(), " or ", ast::StringNode::get_type_static());
      } else {
         Logger::error("Null node when expecting ", ast::IdentifierNode::get_type_static(), " or ", ast::StringNode::get_type_static());
      }
      return false;
   };
}

node_callback_t NodeTools::expect_bool(callback_t<bool> callback) {
   static const string_map_t<bool> bool_map = {
      { "yes", true }, { "no", false }
   };
   return expect_identifier(expect_mapped_string(bool_map, callback));
}

node_callback_t NodeTools::expect_int_bool(callback_t<bool> callback) {
   static const string_map_t<bool> bool_map = {
      { "1", true }, { "0", false }
   };
   return expect_identifier(expect_mapped_string(bool_map, callback));
}

node_callback_t NodeTools::expect_int64(callback_t<int64_t> callback) {
   return expect_identifier(
      [callback](std::string_view identifier) -> bool {
         bool successful = false;
         const int64_t val = StringUtils::string_to_int64(identifier, &successful, 10);
         if (successful) {
            return callback(val);
         }
         Logger::error("Invalid int identifier text: ", identifier);
         return false;
      }
   );
}

node_callback_t NodeTools::expect_uint64(callback_t<uint64_t> callback) {
   return expect_identifier(
      [callback](std::string_view identifier) -> bool {
         bool successful = false;
         const uint64_t val = StringUtils::string_to_uint64(identifier, &successful, 10);
         if (successful) {
            return callback(val);
         }
         Logger::error("Invalid uint identifier text: ", identifier);
         return false;
      }
   );
}

node_callback_t NodeTools::expect_fixed_point(callback_t<fixed_point_t> callback) {
   return expect_identifier(
      [callback](std::string_view identifier) -> bool {
         bool successful = false;
         const fixed_point_t val = fixed_point_t::parse(identifier.data(), identifier.length(), &successful);
         if (successful) {
            return callback(val);
         }
         Logger::error("Invalid fixed point identifier text: ", identifier);
         return false;
      }
   );
}

node_callback_t NodeTools::expect_colour(callback_t<colour_t> callback) {
   return [callback](ast::NodeCPtr node) -> bool {
      colour_t col = NULL_COLOUR;
      uint32_t components = 0;
      bool ret = expect_list_of_length(3,
         expect_fixed_point(
            [&col, &components](fixed_point_t val) -> bool {
               components++;
               col <<= 8;
               if (val < 0 || val > 255) {
                  Logger::error("Invalid colour component: ", val);
                  return false;
               } else {
                  if (val <= 1) val *= 255;
                  col |= val.to_int32_t();
                  return true;
               }
            }
         )
      )(node);
      ret &= callback(col << 8 * (3 - components));
      return ret;
   };
}

node_callback_t NodeTools::expect_date(callback_t<Date> callback) {
   return expect_identifier(
      [callback](std::string_view identifier) -> bool {
         bool successful = false;
         const Date date = Date::from_string(identifier, &successful);
         if (successful) {
            return callback(date);
         }
         Logger::error("Invalid date identifier text: ", identifier);
         return false;
      }
   );
}

node_callback_t NodeTools::expect_years(callback_t<Timespan> callback) {
   return expect_uint<Timespan::day_t>([callback](Timespan::day_t val) -> bool {
      return callback(Timespan::fromYears(val));
   });
}

node_callback_t NodeTools::expect_months(callback_t<Timespan> callback) {
   return expect_uint<Timespan::day_t>([callback](Timespan::day_t val) -> bool {
      return callback(Timespan::fromMonths(val));
   });
}

node_callback_t NodeTools::expect_days(callback_t<Timespan> callback) {
   return expect_uint<Timespan::day_t>([callback](Timespan::day_t val) -> bool {
      return callback(Timespan::fromDays(val));
   });
}

template<typename T, node_callback_t (*expect_func)(callback_t<T>)>
NodeCallback auto _expect_vec2(Callback<vec2_t<T>> auto callback) {
   return [callback](ast::NodeCPtr node) -> bool {
      vec2_t<T> vec;
      bool ret = expect_dictionary_keys(
         "x", ONE_EXACTLY, expect_func(assign_variable_callback(vec.x)),
         "y", ONE_EXACTLY, expect_func(assign_variable_callback(vec.y))
      )(node);
      ret &= callback(vec);
      return ret;
   };
}

node_callback_t NodeTools::expect_ivec2(callback_t<ivec2_t> callback) {
   return _expect_vec2<int32_t, expect_int>(callback);
}

node_callback_t NodeTools::expect_fvec2(callback_t<fvec2_t> callback) {
   return _expect_vec2<fixed_point_t, expect_fixed_point>(callback);
}

node_callback_t NodeTools::expect_assign(key_value_callback_t callback) {
   return _expect_type<ast::AssignNode>(
      [callback](ast::AssignNode const& assign_node) -> bool {
         return callback(assign_node._name, assign_node._initializer.get());
      }
   );
}

node_callback_t NodeTools::expect_list_and_length(length_callback_t length_callback, node_callback_t callback) {
   return _expect_type<ast::AbstractListNode>(
      [length_callback, callback](ast::AbstractListNode const& list_node) -> bool {
         std::vector<ast::NodeUPtr> const& list = list_node._statements;
         bool ret = true;
         size_t size = length_callback(list.size());
         if (size > list.size()) {
            Logger::error("Trying to read more values than the list contains: ", size, " > ", list.size());
            size = list.size();
            ret = false;
         }
         std::for_each(list.begin(), list.begin() + size,
            [callback, &ret](ast::NodeUPtr const& sub_node) -> void {
               ret &= callback(sub_node.get());
            }
         );
         return ret;
      }
   );
}

node_callback_t NodeTools::expect_list_of_length(size_t length, node_callback_t callback) {
   return [length, callback](ast::NodeCPtr node) -> bool {
      bool ret = true;
      ret &= expect_list_and_length(
         [length, &ret](size_t size) -> size_t {
            if (size != length) {
               Logger::error("List length ", size, " does not match expected length ", length);
               ret = false;
               if (length < size) return length;
            }
            return size;
         },
         callback
      )(node);
      return ret;
   };
}

node_callback_t NodeTools::expect_list(node_callback_t callback) {
   return expect_list_and_length(default_length_callback, callback);
}

node_callback_t NodeTools::expect_length(callback_t<size_t> callback) {
   return [callback](ast::NodeCPtr node) -> bool {
      bool ret = true;
      ret &= expect_list_and_length(
         [callback, &ret](size_t size) -> size_t {
            ret &= callback(size);
            return 0;
         },
         success_callback
      )(node);
      return ret;
   };
}

node_callback_t NodeTools::expect_key(std::string_view key, node_callback_t callback, bool* key_found) {
   return _expect_type<ast::AbstractListNode>(
      [key, callback, key_found](ast::AbstractListNode const& list_node) -> bool {
         std::vector<ast::NodeUPtr> const& list = list_node._statements;
         for (ast::NodeUPtr const& sub_node : list_node._statements) {
            ast::AssignNode const* assign_node = sub_node->cast_to<ast::AssignNode>();
            if (assign_node != nullptr && assign_node->_name == key) {
               if (key_found != nullptr) {
                  *key_found = true;
               }
               return callback(&*assign_node->_initializer);
            }
         }
         if (key_found != nullptr) {
            *key_found = false;
         } else {
            Logger::error("Failed to find expected key: ", key);
         }
         return false;
      }
   );
}

node_callback_t NodeTools::expect_dictionary_and_length(length_callback_t length_callback, key_value_callback_t callback) {
   return expect_list_and_length(length_callback, expect_assign(callback));
}

node_callback_t NodeTools::expect_dictionary(key_value_callback_t callback) {
   return expect_dictionary_and_length(default_length_callback, callback);
}

bool NodeTools::add_key_map_entry(key_map_t& key_map, std::string_view key, dictionary_entry_t::expected_count_t expected_count, node_callback_t callback) {
   if (key_map.find(key) == key_map.end()) {
      key_map.emplace(key, dictionary_entry_t { expected_count, callback });
      return true;
   }
   Logger::error("Duplicate expected dictionary key: ", key);
   return false;
}

bool NodeTools::remove_key_map_entry(key_map_t& key_map, std::string_view key) {
   const key_map_t::const_iterator it = key_map.find(key);
   if (it != key_map.end()) {
      key_map.erase(it);
      return true;
   }
   Logger::error("Failed to find dictionary key to remove: ", key);
   return false;
}

key_value_callback_t NodeTools::dictionary_keys_callback(key_map_t& key_map, key_value_callback_t default_callback) {
   return [&key_map, default_callback](std::string_view key, ast::NodeCPtr value) -> bool {
      const key_map_t::iterator it = key_map.find(key);
      if (it == key_map.end()) {
         return default_callback(key, value);
      }
      dictionary_entry_t& entry = it->second;
      if (++entry.count > 1 && !entry.can_repeat()) {
         Logger::error("Invalid repeat of dictionary key: ", key);
         return false;
      }
      return entry.callback(value);
   };
}

bool NodeTools::check_key_map_counts(key_map_t& key_map) {
   bool ret = true;
   for (key_map_t::value_type& key_entry : key_map) {
      dictionary_entry_t& entry = key_entry.second;
      if (entry.must_appear() && entry.count < 1) {
         Logger::error("Mandatory dictionary key not present: ", key_entry.first);
         ret = false;
      }
      entry.count = 0;
   }
   return ret;
}

node_callback_t NodeTools::expect_dictionary_key_map_and_length_and_default(key_map_t key_map, length_callback_t length_callback, key_value_callback_t default_callback) {
   return [length_callback, default_callback, key_map = std::move(key_map)](ast::NodeCPtr node) mutable -> bool {
      bool ret = expect_dictionary_and_length(
         length_callback, dictionary_keys_callback(key_map, default_callback)
      )(node);
      ret &= check_key_map_counts(key_map);
      return ret;
   };
}

node_callback_t NodeTools::expect_dictionary_key_map_and_length(key_map_t key_map, length_callback_t length_callback) {
   return expect_dictionary_key_map_and_length_and_default(std::move(key_map), length_callback, key_value_invalid_callback);
}

node_callback_t NodeTools::expect_dictionary_key_map_and_default(key_map_t key_map, key_value_callback_t default_callback) {
   return expect_dictionary_key_map_and_length_and_default(std::move(key_map), default_length_callback, default_callback);
}

node_callback_t NodeTools::expect_dictionary_key_map(key_map_t key_map) {
   return expect_dictionary_key_map_and_length_and_default(std::move(key_map), default_length_callback, key_value_invalid_callback);
}

node_callback_t NodeTools::name_list_callback(callback_t<std::vector<std::string>&&> callback) {
   return [callback](ast::NodeCPtr node) -> bool {
      std::vector<std::string> list;
      bool ret = expect_list_reserve_length(
         list,
         expect_identifier_or_string(
            [&list](std::string_view str) -> bool {
               if (!str.empty()) {
                  list.push_back(std::string { str });
                  return true;
               }
               Logger::error("Empty identifier or string");
               return false;
            }
         )
      )(node);
      ret &= callback(std::move(list));
      return ret;
   };
}

callback_t<std::string_view> NodeTools::assign_variable_callback_string(std::string& var) {
   return assign_variable_callback_cast<std::string_view>(var);
}