lang_2023/include/global_info.hpp

#pragma once

#include <string>
#include <unordered_map>

// for clangd
#include "symbols_info.hpp"

namespace info {

// TODO: partitions
class GlobalInfo {
public:
  GlobalInfo() {
    namespace_stack.push_back(&global_namespace_);
  }

  void AddImport(ImportInfo&& import_info, const std::optional<std::string>& name = std::nullopt) {
    if (name.has_value()) {
      usages_[name.value()] = std::move(import_info);
    } else {
      imports_.push_back(std::move(import_info));
    }
  }

  void AddEnterNamespace(const std::string& type,
                         const std::optional<NamespaceInfo::Modifier>& modifier = std::nullopt,
                         const std::optional<std::string>& variable = std::nullopt) {
    NamespaceInfo* namespace_info = &namespace_stack.back()->namespaces[type].emplace_back();
    namespace_stack.push_back(namespace_info);

    namespace_info->modifier = modifier;
    namespace_info->variable = variable;
    namespace_info->type_name = type;
  }

  void ExitNamespace() {
    if (namespace_stack.size() <= 1) {
      // error
      return;
    }

    namespace_stack.pop_back();
  }

  void ToGlobalNamespace() {
    namespace_stack.clear();
    namespace_stack.push_back(&global_namespace_);
  }

  void AddFunctionDeclaration(const std::string& name,
                              FunctionDeclarationInfo&& function_declaration_info) {
    FunctionInfo* function_info = &namespace_stack.back()->functions[name];

    function_info->declaration = std::move(function_declaration_info);
  }

  void AddFunctionDefinition(const std::string& name,
                   FunctionDefinitionInfo&& function_definition_info) {
    FunctionInfo* function_info = &namespace_stack.back()->functions[name];

    function_info->definition = std::move(function_definition_info);
  }

  void AddType(const std::string& type,
               TypeInfo&& type_info) {
    namespace_stack.back()->types[type] = std::move(type_info);
  }

  void AddTypeclass(const std::string& typeclass,
                    TypeclassInfo&& typeclass_info) {
    namespace_stack.back()->typeclasses[typeclass] = std::move(typeclass_info);
  }

  // FindFunction
  // FindType

  // FindVar ??

private:
  std::vector<NamespaceInfo*> namespace_stack;

  NamespaceInfo global_namespace_;
  std::vector<ImportInfo> imports_;
  std::unordered_map<std::string, ImportInfo> usages_;
};

} // namespace info