#ifndef __SQL_API_PRIVATE_H
#define __SQL_API_PRIVATE_H

#include "sql-api.h"

struct sql_db {
	const char *name;

	struct sql_db *(*init)(const char *connect_string);
	void (*deinit)(struct sql_db *db);

	enum sql_db_flags (*get_flags)(struct sql_db *db);

	int (*connect)(struct sql_db *db);
	char *(*escape_string)(struct sql_db *db, const char *string);
	void (*exec)(struct sql_db *db, const char *query);
	void (*query)(struct sql_db *db, const char *query,
		      sql_query_callback_t *callback, void *context);
	struct sql_result *(*query_s)(struct sql_db *db, const char *query);

	struct sql_transaction_context *(*transaction_begin)(struct sql_db *db);
	void (*transaction_commit)(struct sql_transaction_context *ctx,
				   sql_commit_callback_t *callback,
				   void *context);
	int (*transaction_commit_s)(struct sql_transaction_context *ctx,
				    const char **error_r);
	void (*transaction_rollback)(struct sql_transaction_context *ctx);

	void (*update)(struct sql_transaction_context *ctx, const char *query);
};

struct sql_result {
	struct sql_db *db;

	void (*free)(struct sql_result *result);
	int (*next_row)(struct sql_result *result);

	unsigned int (*get_fields_count)(struct sql_result *result);
	const char *(*get_field_name)(struct sql_result *result,
				      unsigned int idx);
	int (*find_field)(struct sql_result *result, const char *field_name);

	const char *(*get_field_value)(struct sql_result *result,
				       unsigned int idx);
	const char *(*find_field_value)(struct sql_result *result,
					const char *field_name);
	const char *const *(*get_values)(struct sql_result *result);

	const char *(*get_error)(struct sql_result *result);

	unsigned int callback:1;
};

struct sql_transaction_context {
	struct sql_db *db;
};

extern array_t ARRAY_DEFINE(sql_drivers, const struct sql_db *);
extern struct sql_result sql_not_connected_result;

#endif