#ifndef QUERY_BACKEND_PROVIDER_HPP
#define QUERY_BACKEND_PROVIDER_HPP

#include "matador/utils/library.hpp"

#include <string>
#include <unordered_map>

namespace matador::sql {

class connection_impl;
class dialect;

class backend_provider
{
public:
  explicit backend_provider(std::string backends_path);

  connection_impl* create_connection(const std::string &connection_type);
  const dialect& connection_dialect(const std::string &connection_type);

private:
  struct backend_context {
    backend_context(const std::string &connection_type,
                    const std::string &backends_path);
    ~backend_context();

    typedef connection_impl*(*create_func)();
    typedef void (*destroy_func)(connection_impl*);
    typedef const dialect*(*dialect_func)();

    create_func create_connection{};
    destroy_func destroy_connection{};
    dialect_func get_dialect{};
    utils::library lib;
  };
private:
  using backends_t = std::unordered_map<std::string, backend_context>;
  backends_t backends_;
  std::string backends_path_;
};
}
#endif //QUERY_BACKEND_PROVIDER_HPP