path: root/include/openvic-dataloader/v2script/AbstractSyntaxTree.hpp

#pragma once

#include <cstddef>
#include <cstdint>
#include <iostream>
#include <memory>
#include <string>
#include <string_view>
#include <type_traits>
#include <utility>
#include <vector>

#include <openvic-dataloader/detail/OptionalConstexpr.hpp>
#include <openvic-dataloader/detail/SelfType.hpp>
#include <openvic-dataloader/detail/TypeName.hpp>

namespace lexy {
   struct nullopt;
}

namespace ovdl::v2script {
   class Parser;
}

#define OVDL_PRINT_FUNC_DEF std::ostream& print(std::ostream& stream, std::size_t indent) const override

// defines get_type_static and get_type for string type naming
#define OVDL_RT_TYPE_DEF                                                                              \
   static constexpr std::string_view get_type_static() { return ::ovdl::detail::type_name<type>(); } \
   constexpr std::string_view get_type() const override { return ::ovdl::detail::type_name<std::decay_t<decltype(*this)>>(); }

// defines type for self-class referencing
#define OVDL_TYPE_DEFINE_SELF                                                                                \
   struct _self_type_tag {};                                                                                \
   constexpr auto _self_type_helper()->decltype(::ovdl::detail::Writer<_self_type_tag, decltype(this)> {}); \
   using type = ::ovdl::detail::Read<_self_type_tag>;

namespace ovdl::v2script::ast {

   struct Node;
   using NodePtr = Node*;
   using NodeCPtr = const Node*;
   using NodeUPtr = std::unique_ptr<Node>;

   struct NodeLocation {
      const char* _begin = nullptr;
      const char* _end = nullptr;

      NodeLocation() = default;
      NodeLocation(const char* pos) : _begin(pos),
                              _end(pos) {}
      NodeLocation(const char* begin, const char* end) : _begin(begin),
                                             _end(end) {}

      NodeLocation(const NodeLocation&) = default;
      NodeLocation& operator=(const NodeLocation&) = default;

      NodeLocation(NodeLocation&&) = default;
      NodeLocation& operator=(NodeLocation&&) = default;

      const char* begin() const { return _begin; }
      const char* end() const { return _end; }

      static inline NodeLocation make_from(const char* begin, const char* end) {
         end++;
         if (begin >= end) return NodeLocation(begin);
         return NodeLocation(begin, end);
      }
   };

   struct Node {
      Node(const Node&) = delete;
      Node& operator=(const Node&) = delete;
      Node(NodeLocation location) : _location(location) {}
      Node(Node&&) = default;
      Node& operator=(Node&&) = default;
      virtual ~Node() = default;

      virtual std::ostream& print(std::ostream& stream, std::size_t indent) const = 0;
      static std::ostream& print_ptr(std::ostream& stream, NodeCPtr node, std::size_t indent);
      explicit operator std::string() const;

      static constexpr std::string_view get_type_static() { return detail::type_name<Node>(); }
      constexpr virtual std::string_view get_type() const = 0;

      static constexpr std::string_view get_base_type_static() { return detail::type_name<Node>(); }
      constexpr virtual std::string_view get_base_type() const { return get_base_type_static(); }

      template<typename T>
      constexpr bool is_type() const {
         return get_type().compare(detail::type_name<T>()) == 0;
      }

      template<typename T>
      constexpr bool is_derived_from() const {
         return is_type<T>() || get_base_type().compare(detail::type_name<T>()) == 0;
      }

      template<typename T>
      constexpr T* cast_to() {
         if (is_derived_from<T>() || is_type<Node>()) return (static_cast<T*>(this));
         return nullptr;
      }

      template<typename T>
      constexpr const T* const cast_to() const {
         if (is_derived_from<T>() || is_type<Node>()) return (static_cast<const T*>(this));
         return nullptr;
      }

      const NodeLocation location() const { return _location; }

      struct line_col {
         uint32_t line;
         uint32_t column;
      };

   private:
      friend class ::ovdl::v2script::Parser;
      const line_col get_begin_line_col(const Parser& parser) const;
      const line_col get_end_line_col(const Parser& parser) const;

   private:
      NodeLocation _location;
   };

   inline std::ostream& operator<<(std::ostream& stream, Node const& node) {
      return node.print(stream, 0);
   }
   inline std::ostream& operator<<(std::ostream& stream, NodeCPtr node) {
      return Node::print_ptr(stream, node, 0);
   }
   inline std::ostream& operator<<(std::ostream& stream, Node::line_col const& val) {
      return stream << '(' << val.line << ':' << val.column << ')';
   }

   template<class T, class... Args>
   NodePtr make_node_ptr(Args&&... args) {
      if constexpr (std::is_pointer_v<NodePtr>) {
         return new T(std::forward<Args>(args)...);
      } else {
         return NodePtr(new T(std::forward<Args>(args)...));
      }
   }

   template<typename To, typename From>
   To& cast_node_ptr(const From& from) {
      if constexpr (std::is_pointer_v<NodePtr>) {
         return *static_cast<To*>(from);
      } else {
         return *static_cast<To*>(from.get());
      }
   }

   template<typename To, typename From>
   const To& cast_node_cptr(const From& from) {
      if constexpr (std::is_pointer_v<NodePtr>) {
         return *static_cast<const To*>(from);
      } else {
         return *static_cast<const To*>(from.get());
      }
   }

   void copy_into_node_ptr_vector(const std::vector<NodePtr>& source, std::vector<NodeUPtr>& dest);

   struct AbstractStringNode : public Node {
      std::string _name;
      AbstractStringNode();
      AbstractStringNode(std::string&& name);
      AbstractStringNode(NodeLocation location);
      AbstractStringNode(NodeLocation location, std::string&& name);
      OVDL_TYPE_DEFINE_SELF;
      OVDL_RT_TYPE_DEF;
      OVDL_PRINT_FUNC_DEF;
      static constexpr std::string_view get_base_type_static() { return detail::type_name<AbstractStringNode>(); }
      constexpr std::string_view get_base_type() const override { return ::ovdl::detail::type_name<std::decay_t<decltype(*this)>>(); }
   };

#define OVDL_AST_STRING_NODE(NAME)                       \
   struct NAME final : public AbstractStringNode {      \
      NAME();                                          \
      NAME(std::string&& name);                        \
      NAME(lexy::nullopt);                             \
      NAME(NodeLocation location);                     \
      NAME(NodeLocation location, std::string&& name); \
      NAME(NodeLocation location, lexy::nullopt);      \
      OVDL_TYPE_DEFINE_SELF;                           \
      OVDL_RT_TYPE_DEF;                                \
      OVDL_PRINT_FUNC_DEF;                             \
   }

   // Value Expression Nodes
   OVDL_AST_STRING_NODE(IdentifierNode);
   OVDL_AST_STRING_NODE(StringNode);

   // Assignment Nodes
   OVDL_AST_STRING_NODE(FactorNode);
   OVDL_AST_STRING_NODE(MonthNode);
   OVDL_AST_STRING_NODE(NameNode);
   OVDL_AST_STRING_NODE(FireOnlyNode);
   OVDL_AST_STRING_NODE(IdNode);
   OVDL_AST_STRING_NODE(TitleNode);
   OVDL_AST_STRING_NODE(DescNode);
   OVDL_AST_STRING_NODE(PictureNode);
   OVDL_AST_STRING_NODE(IsTriggeredNode);

#undef OVDL_AST_STRING_NODE

   struct AssignNode final : public Node {
      std::string _name;
      NodeUPtr _initializer;
      AssignNode(NodeLocation location, NodeCPtr name, NodePtr init);
      OVDL_TYPE_DEFINE_SELF;
      OVDL_RT_TYPE_DEF;
      OVDL_PRINT_FUNC_DEF;
   };

   struct AbstractListNode : public Node {
      std::vector<NodeUPtr> _statements;
      AbstractListNode(const std::vector<NodePtr>& statements = std::vector<NodePtr> {});
      AbstractListNode(NodeLocation location, const std::vector<NodePtr>& statements = std::vector<NodePtr> {});
      OVDL_TYPE_DEFINE_SELF;
      OVDL_RT_TYPE_DEF;
      OVDL_PRINT_FUNC_DEF;
      static constexpr std::string_view get_base_type_static() { return detail::type_name<AbstractListNode>(); }
      constexpr std::string_view get_base_type() const override { return ::ovdl::detail::type_name<std::decay_t<decltype(*this)>>(); }
   };

#define OVDL_AST_LIST_NODE(NAME)                                                                       \
   struct NAME final : public AbstractListNode {                                                      \
      NAME(const std::vector<NodePtr>& statements = std::vector<NodePtr> {});                        \
      NAME(lexy::nullopt);                                                                           \
      NAME(NodeLocation location, const std::vector<NodePtr>& statements = std::vector<NodePtr> {}); \
      NAME(NodeLocation location, lexy::nullopt);                                                    \
      OVDL_TYPE_DEFINE_SELF;                                                                         \
      OVDL_RT_TYPE_DEF;                                                                              \
      OVDL_PRINT_FUNC_DEF;                                                                           \
   }

   OVDL_AST_LIST_NODE(FileNode);
   OVDL_AST_LIST_NODE(ListNode);

   OVDL_AST_LIST_NODE(ModifierNode);
   OVDL_AST_LIST_NODE(MtthNode);
   OVDL_AST_LIST_NODE(EventOptionNode);
   OVDL_AST_LIST_NODE(BehaviorListNode);
   OVDL_AST_LIST_NODE(DecisionListNode);

#undef OVDL_AST_LIST_NODE

   struct EventNode final : public Node {
      enum class Type {
         Country,
         Province
      } _type;
      std::vector<NodeUPtr> _statements;
      EventNode(Type type, const std::vector<NodePtr>& statements = {});
      EventNode(NodeLocation location, Type type, const std::vector<NodePtr>& statements = {});
      OVDL_TYPE_DEFINE_SELF;
      OVDL_RT_TYPE_DEF;
      OVDL_PRINT_FUNC_DEF;
   };

   struct DecisionNode final : public Node {
      NodeUPtr _name;
      std::vector<NodeUPtr> _statements;
      DecisionNode(NodePtr name, const std::vector<NodePtr>& statements = {});
      DecisionNode(NodeLocation location, NodePtr name, const std::vector<NodePtr>& statements = {});
      OVDL_TYPE_DEFINE_SELF;
      OVDL_RT_TYPE_DEF;
      OVDL_PRINT_FUNC_DEF;
   };

   struct EventMtthModifierNode final : public Node {
      NodeUPtr _factor_value;
      std::vector<NodeUPtr> _statements;
      EventMtthModifierNode() : Node({}) {}
      EventMtthModifierNode(NodeLocation location) : Node(location) {}
      OVDL_TYPE_DEFINE_SELF;
      OVDL_RT_TYPE_DEF;
      OVDL_PRINT_FUNC_DEF;
   };

   // Packed single case
   struct ExecutionNode final : public Node {
      enum class Type {
         Effect,
         Trigger
      } _type;
      NodeUPtr _name;
      NodeUPtr _initializer;
      ExecutionNode(Type type, NodePtr name, NodePtr init);
      ExecutionNode(NodeLocation location, Type type, NodePtr name, NodePtr init);
      OVDL_TYPE_DEFINE_SELF;
      OVDL_RT_TYPE_DEF;
      OVDL_PRINT_FUNC_DEF;
   };

   struct ExecutionListNode final : public Node {
      ExecutionNode::Type _type;
      std::vector<NodeUPtr> _statements;
      ExecutionListNode(ExecutionNode::Type type, const std::vector<NodePtr>& statements);
      ExecutionListNode(NodeLocation location, ExecutionNode::Type type, const std::vector<NodePtr>& statements);
      OVDL_TYPE_DEFINE_SELF;
      OVDL_RT_TYPE_DEF;
      OVDL_PRINT_FUNC_DEF;
   };

}

#undef OVDL_PRINT_FUNC_DECL
#undef OVDL_PRINT_FUNC_DEF
#undef OVDL_TYPE_DEFINE_SELF