#pragma once

#include <string>
#include <variant>
#include <optional>
#include <vector>
#include <unordered_map>

// for clangd

namespace interpreter {
  class Node;
} // namespace interpreter

namespace info {

using NumberValue = long long;
using FloatNumberValue = float;
using StringValue = std::string;

struct SimpleValue {
  std::variant<NumberValue, FloatNumberValue, StringValue> value;
};

struct Value {
  enum class ValueStructure {
    Simple, // one value
    Variant, // one value from list, can have arguments
    // MultiVariant, // constructed variant // ??
    Tuple, // tuple of values
  };
  ValueStructure structure;
  std::vector<std::variant<SimpleValue, Value>> values;
};
// better variant value storage (then string) ??

struct Info {
  std::string name;
};

struct VariantTypeInfo;
struct TupleTypeInfo;
struct AliasTypeInfo;

enum class BuiltInTypeInfo {
  StringT,
  IntT,
  FloatT,
};

using TypeInfo = std::variant<VariantTypeInfo, TupleTypeInfo, AliasTypeInfo, BuiltInTypeInfo>;

struct VariableInfo : public Info {
  Value value;
  TypeInfo* type = nullptr;
};
// TODO lambda functions as values

// TODO aliases ??

struct TupleTypeInfo : public Info {
  std::vector<std::pair<std::optional<std::string>, TypeInfo>> fields;
};

struct VariantTypeInfo : public Info {
  std::vector<std::variant<std::string, TupleTypeInfo>> constructors;
  // ?? any type instead of tuple type ??
};

struct AliasTypeInfo : public Info {
  bool isAnotherType; // = true by default ??
  TypeInfo* type = nullptr;
};

struct TypeclassInfo : public Info {
    // TODO
};

struct PointerInfo {
  VariableInfo* variable;
};

struct FunctionInfo : public Info {
  interpreter::Node* definition;
  std::vector<VariableInfo> args;
  // add requirements ??
};

struct NamespaceInfo : public Info {
  std::unordered_map<std::string, TypeInfo> types;
  std::unordered_map<std::string, VariableInfo> variables;
  std::unordered_map<std::string, FunctionInfo> functions;
  std::unordered_map<std::string, NamespaceInfo> namespaces;
};

} // namespace info