#ifndef MATADOR_PRIMARY_KEY_ACCESSOR_HPP
#define MATADOR_PRIMARY_KEY_ACCESSOR_HPP

#include "matador/utils/field_attributes.hpp"
#include "matador/utils/primary_key_attribute.hpp"

#include <cstdint>
#include <string>

namespace matador::utils {
class foreign_attributes;
namespace detail {
template < typename PrimaryKeyType >
class primary_key_setter {
public:
  explicit primary_key_setter(const std::string &name, const PrimaryKeyType& value)
  : name_(name)
  , value_(value){}

  void on_primary_key(const char *id, PrimaryKeyType &pk, const utils::primary_key_attribute & = utils::default_pk_attributes) {
    if (id != nullptr && name_ == id) {
      pk = static_cast<PrimaryKeyType>(value_);
    }
  }
  template<typename ValueType>
  static void on_primary_key(const char * /*id*/, ValueType & /*pk*/, const utils::primary_key_attribute & = utils::default_pk_attributes) {}
  static void on_revision(const char * /*id*/, uint64_t & /*rev*/) {}
  template<typename T>
  static void on_attribute(const char * /*id*/, T &, const utils::field_attributes & = utils::null_attributes) {}
  template<class P>
  static void on_belongs_to(const char * /*id*/, P &, const utils::foreign_attributes & ) {}
  template<class P>
  static void on_has_one(const char * /*id*/, P &, const utils::foreign_attributes & ) {}
  template<class C>
  static void on_has_many(const char * /*id*/, C &, const char * /*join_column*/, const utils::foreign_attributes & ) {}
  template<class C>
  static void on_has_many_to_many(const char * /*id*/, C &, const char * /*join_column*/, const char * /*inverse_join_column*/, const utils::foreign_attributes & ) {}
  template<class C>
  static void on_has_many_to_many(const char * /*id*/, C &, const utils::foreign_attributes & ) {}

private:
  const std::string &name_;
  PrimaryKeyType value_{};
};

struct pk_unset_checker {
  const std::string &name;
  bool unset{true};

  template<class V>
  void on_primary_key(const char *id, V &pk, const utils::primary_key_attribute & = utils::default_pk_attributes) {
    if (id != nullptr && name == id) {
      // Your convention: 0 means unset for integer PKs
      unset = (static_cast<std::uint64_t>(pk) == 0ULL);
    }
  }
  static void on_revision(const char * /*id*/, uint64_t & /*rev*/) {}
  template<typename T>
  static void on_attribute(const char * /*id*/, T &, const utils::field_attributes & = utils::null_attributes) {}
  template<class P>
  static void on_belongs_to(const char * /*id*/, P &, const utils::foreign_attributes & ) {}
  template<class P>
  static void on_has_one(const char * /*id*/, P &, const utils::foreign_attributes & ) {}
  template<class C>
  static void on_has_many(const char * /*id*/, C &, const char * /*join_column*/, const utils::foreign_attributes & ) {}
  template<class C>
  static void on_has_many_to_many(const char * /*id*/, C &, const char * /*join_column*/, const char * /*inverse_join_column*/, const utils::foreign_attributes & ) {}
  template<class C>
  static void on_has_many_to_many(const char * /*id*/, C &, const utils::foreign_attributes & ) {}
};

struct pk_value_extractor {
  std::uint64_t value{0};

  template<class V>
  void on_primary_key(const char * /*id*/, V &pk, const utils::primary_key_attribute & = utils::default_pk_attributes) {
    value = static_cast<std::uint64_t>(pk);
  }
  static void on_revision(const char * /*id*/, uint64_t & /*rev*/) {}
  template<typename T>
  static void on_attribute(const char * /*id*/, T &, const utils::field_attributes & = utils::null_attributes) {}
  template<class P>
  static void on_belongs_to(const char * /*id*/, P &, const utils::foreign_attributes & ) {}
  template<class P>
  static void on_has_one(const char * /*id*/, P &, const utils::foreign_attributes & ) {}
  template<class C>
  static void on_has_many(const char * /*id*/, C &, const char * /*join_column*/, const utils::foreign_attributes & ) {}
  template<class C>
  static void on_has_many_to_many(const char * /*id*/, C &, const char * /*join_column*/, const char * /*inverse_join_column*/, const utils::foreign_attributes & ) {}
  template<class C>
  static void on_has_many_to_many(const char * /*id*/, C &, const utils::foreign_attributes & ) {}
};

}

template<typename PrimaryKeyType>
class primary_key_accessor {
public:

  PrimaryKeyType get() const;
  PrimaryKeyType
};
}

#endif //MATADOR_PRIMARY_KEY_ACCESSOR_HPP