#ifndef QUERY_SESSION_HPP
#define QUERY_SESSION_HPP

#include "matador/sql/connection.hpp"
#include "matador/sql/connection_pool.hpp"
#include "matador/sql/entity.hpp"
#include "matador/sql/statement.hpp"
#include "matador/sql/table_repository.hpp"

#include <unordered_map>

namespace matador::sql {

class dialect;

class session
{
public:
  explicit session(connection_pool<connection> &pool);

  template<typename Type>
  void attach(const std::string &table_name);

  void create_schema();

  template<typename Type>
  entity<Type> insert(Type *obj);

  template< class Type, typename... Args >
  entity<Type> insert(Args&&... args) {
    return insert(new Type(std::forward<Args>(args)...));
  }

  template<typename Type>
  void drop_table();
  void drop_table(const std::string &table_name);

  [[nodiscard]] query_result<record> fetch(const query_context &q) const;
//  [[nodiscard]] query_result<record> fetch(const std::string &sql) const;
  [[nodiscard]] size_t execute(const std::string &sql) const;
  statement prepare(query_context q) const;

  record describe_table(const std::string &table_name) const;
  bool table_exists(const std::string &table_name) const;

  [[nodiscard]] const table_repository& tables() const;

  const class dialect& dialect() const;

private:
  friend class query_select_finish;

  [[nodiscard]] std::unique_ptr<query_result_impl> fetch(const std::string &sql) const;

private:
  connection_pool<connection> &pool_;
  const class dialect &dialect_;

  table_repository table_repository_;
  mutable std::unordered_map<std::string, record> prototypes_;
};

template<typename Type>
void session::attach(const std::string &table_name)
{
  table_repository_.attach<Type>(table_name);
}

template<typename Type>
entity<Type> session::insert(Type *obj)
{
  auto c = pool_.acquire();
  auto info = table_repository_.info<Type>();
  if (!info) {
    return {};
  }
  c->insert().into<Type>(info->name).values(*obj).execute();

  return entity{obj};
}

template<typename Type>
void session::drop_table()
{
  auto info = table_repository_.info<Type>();
  if (info) {
    return drop_table(info.name);
  }

}
}
#endif //QUERY_SESSION_HPP