#ifndef DB_H
#define DB_H

#include "db_access.h"
#include "cache.h"

typedef struct 
{
	db_index_t index;
	cache_t* cache;
} db_t;


typedef db_data_interval_t db_data_set_t;

typedef struct 
{
	db_time_t start;
	db_time_t end;
} db_time_interval_t;

typedef struct 
{
	int n;
	db_time_interval_t data[256]; 
} db_time_interval_set_t;

db_interval_t db_inter_get(db_t* db, db_date_t d);

/**
 *  Init (load) database (only metadata)
 * \param db An allocate db_t object (output)
 * \return Errno if errors occur else 0
 */
int  db_init(db_t* db);

/**
 *  Free the content of a db_t object
 * \param db The database
 */
void db_free(db_t* db);



db_data_set_t* db_get(db_t* db, db_time_t* start, db_time_t* end);

/**
 *  Load an entire data interval from databse
 * \param db The input database
 * \param ds The start date
 * \param dsm The start time (in microseconds)
 * \param de The end date
 * \param dem The end time (in microseconds)
 */
db_data_interval_t* db_load_fault(db_t* db, db_date_t ds, uint32_t dsm,
																					 db_date_t de, uint32_t dem);


int db_load_page(db_t* db, uint64_t page, db_data_t* buffer);

#endif