#ifndef H_RPMTE
#define H_RPMTE

/** \ingroup rpmts rpmte
 * \file lib/rpmte.h
 * Structures used for an "rpmte" transaction element.
 */

#include <rpm/rpmtypes.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 */
extern int _rpmte_debug;

/** \ingroup rpmte
 * Transaction element ordering chain linkage.
 */
typedef struct tsortInfo_s *		tsortInfo;

/** \ingroup rpmte
 * Transaction element iterator.
 */
typedef struct rpmtsi_s *		rpmtsi;

/** \ingroup rpmte
 * Transaction element type.
 */
typedef enum rpmElementType_e {
    TR_ADDED		= (1 << 0),	/*!< Package will be installed. */
    TR_REMOVED		= (1 << 1)	/*!< Package will be removed. */
} rpmElementType;

/** \ingroup rpmte
 * Destroy a transaction element.
 * @param te		transaction element
 * @return		NULL always
 */
rpmte rpmteFree(rpmte te);

/** \ingroup rpmte
 * Create a transaction element.
 * @param ts		transaction set
 * @param h		header
 * @param type		TR_ADDED/TR_REMOVED
 * @param key		(TR_ADDED) package retrieval key (e.g. file name)
 * @param relocs	(TR_ADDED) package file relocations
 * @param dboffset	unused
 * @return		new transaction element
 */
rpmte rpmteNew(const rpmts ts, Header h, rpmElementType type,
		fnpyKey key,
		rpmRelocation * relocs,
		int dboffset);

/** \ingroup rpmte
 * Retrieve header from transaction element.
 * @param te		transaction element
 * @return		header
 */
Header rpmteHeader(rpmte te);

/** \ingroup rpmte
 * Save header into transaction element.
 * @param te		transaction element
 * @param h		header
 * @return		NULL always
 */
Header rpmteSetHeader(rpmte te, Header h);

/** \ingroup rpmte
 * Retrieve type of transaction element.
 * @param te		transaction element
 * @return		type
 */
rpmElementType rpmteType(rpmte te);

/** \ingroup rpmte
 * Retrieve name string of transaction element.
 * @param te		transaction element
 * @return		name string
 */
const char * rpmteN(rpmte te);

/** \ingroup rpmte
 * Retrieve epoch string of transaction element.
 * @param te		transaction element
 * @return		epoch string
 */
const char * rpmteE(rpmte te);

/** \ingroup rpmte
 * Retrieve version string of transaction element.
 * @param te		transaction element
 * @return		version string
 */
const char * rpmteV(rpmte te);

/** \ingroup rpmte
 * Retrieve release string of transaction element.
 * @param te		transaction element
 * @return		release string
 */
const char * rpmteR(rpmte te);

/** \ingroup rpmte
 * Retrieve arch string of transaction element.
 * @param te		transaction element
 * @return		arch string
 */
const char * rpmteA(rpmte te);

/** \ingroup rpmte
 * Retrieve os string of transaction element.
 * @param te		transaction element
 * @return		os string
 */
const char * rpmteO(rpmte te);

/** \ingroup rpmte
 * Retrieve isSource attribute of transaction element.
 * @param te		transaction element
 * @return		isSource attribute
 */
int rpmteIsSource(rpmte te);

/** \ingroup rpmte
 * Retrieve color bits of transaction element.
 * @param te		transaction element
 * @return		color bits
 */
rpm_color_t rpmteColor(rpmte te);

/** \ingroup rpmte
 * Set color bits of transaction element.
 * @param te		transaction element
 * @param color		new color bits
 * @return		previous color bits
 */
rpm_color_t rpmteSetColor(rpmte te, rpm_color_t color);

/** \ingroup rpmte
 * Retrieve last instance installed to the database.
 * @param te		transaction element
 * @return		last install instance.
 */
unsigned int rpmteDBInstance(rpmte te);

/** \ingroup rpmte
 * Set last instance installed to the database.
 * @param te		transaction element
 * @param instance	Database instance of last install element.
 * @return		last install instance.
 */
void rpmteSetDBInstance(rpmte te, unsigned int instance);

/** \ingroup rpmte
 * Retrieve size in bytes of package file.
 * @todo Signature header is estimated at 256b.
 * @param te		transaction element
 * @return		size in bytes of package file.
 */
rpm_loff_t rpmtePkgFileSize(rpmte te);

/** \ingroup rpmte
 * Retrieve dependency tree depth of transaction element.
 * @param te		transaction element
 * @return		depth
 */
int rpmteDepth(rpmte te);

/** \ingroup rpmte
 * Set dependency tree depth of transaction element.
 * @param te		transaction element
 * @param ndepth	new depth
 * @return		previous depth
 */
int rpmteSetDepth(rpmte te, int ndepth);

/** \ingroup rpmte
 * Retrieve dependency tree breadth of transaction element.
 * @param te		transaction element
 * @return		breadth
 */
int rpmteBreadth(rpmte te);

/** \ingroup rpmte
 * Set dependency tree breadth of transaction element.
 * @param te		transaction element
 * @param nbreadth	new breadth
 * @return		previous breadth
 */
int rpmteSetBreadth(rpmte te, int nbreadth);

/** \ingroup rpmte
 * Retrieve tsort no. of predecessors of transaction element.
 * @param te		transaction element
 * @return		no. of predecessors
 */
int rpmteNpreds(rpmte te);

/** \ingroup rpmte
 * Set tsort no. of predecessors of transaction element.
 * @param te		transaction element
 * @param npreds	new no. of predecessors
 * @return		previous no. of predecessors
 */
int rpmteSetNpreds(rpmte te, int npreds);

/** \ingroup rpmte
 * Retrieve tree index of transaction element.
 * @param te		transaction element
 * @return		tree index
 */
int rpmteTree(rpmte te);

/** \ingroup rpmte
 * Set tree index of transaction element.
 * @param te		transaction element
 * @param ntree		new tree index
 * @return		previous tree index
 */
int rpmteSetTree(rpmte te, int ntree);

/** \ingroup rpmte
 * Retrieve parent transaction element.
 * @param te		transaction element
 * @return		parent transaction element
 */
rpmte rpmteParent(rpmte te);

/** \ingroup rpmte
 * Set parent transaction element.
 * @param te		transaction element
 * @param pte		new parent transaction element
 * @return		previous parent transaction element
 */
rpmte rpmteSetParent(rpmte te, rpmte pte);

/** \ingroup rpmte
 * Retrieve number of children of transaction element.
 * @param te		transaction element
 * @return		tree index
 */
int rpmteDegree(rpmte te);

/** \ingroup rpmte
 * Set number of children of transaction element.
 * @param te		transaction element
 * @param ndegree	new number of children
 * @return		previous number of children
 */
int rpmteSetDegree(rpmte te, int ndegree);

/** \ingroup rpmte
 * Retrieve tsort info for transaction element.
 * @param te		transaction element
 * @return		tsort info
 */
tsortInfo rpmteTSI(rpmte te);

/** \ingroup rpmte
 * Destroy tsort info of transaction element.
 * @param te		transaction element
 */
void rpmteFreeTSI(rpmte te);

/** \ingroup rpmte
 * Initialize tsort info of transaction element.
 * @param te		transaction element
 */
void rpmteNewTSI(rpmte te);

/** \ingroup rpmte
 * Destroy dependency set info of transaction element.
 * @param te		transaction element
 */
void rpmteCleanDS(rpmte te);

/** \ingroup rpmte
 * Set dependent element of TR_REMOVED transaction element.
 * @param te		transaction element
 * @param depends       dependent transaction element
 */
void rpmteSetDependsOn(rpmte te, rpmte depends);

/** \ingroup rpmte
 * Retrieve dependent element of TR_REMOVED transaction element.
 * @param te		transaction element
 * @return		dependent transaction element
 */
rpmte rpmteDependsOn(rpmte te);

/** \ingroup rpmte
 * Retrieve rpmdb instance of TR_REMOVED transaction element.
 * @param te		transaction element
 * @return		rpmdb instance
 */
int rpmteDBOffset(rpmte te);

/** \ingroup rpmte
 * Retrieve [epoch:]version-release string from transaction element.
 * @param te		transaction element
 * @return		[epoch:]version-release string
 */
const char * rpmteEVR(rpmte te);

/** \ingroup rpmte
 * Retrieve name-[epoch:]version-release string from transaction element.
 * @param te		transaction element
 * @return		name-[epoch:]version-release string
 */
const char * rpmteNEVR(rpmte te);

/** \ingroup rpmte
 * Retrieve name-[epoch:]version-release.arch string from transaction element.
 * @param te		transaction element
 * @return		name-[epoch:]version-release.arch string
 */
const char * rpmteNEVRA(rpmte te);

/** \ingroup rpmte
 * Retrieve file handle from transaction element.
 * @param te		transaction element
 * @return		file handle
 */
FD_t rpmteFd(rpmte te);

/** \ingroup rpmte
 * Retrieve key from transaction element.
 * @param te		transaction element
 * @return		key
 */
fnpyKey rpmteKey(rpmte te);

/** \ingroup rpmte
 * Return failed status of transaction element.
 * @param te		transaction element
 * @return		1 if transaction element (or its parents) failed
 */
int rpmteFailed(rpmte te);

/** \ingroup rpmte
 * Retrieve dependency tag set from transaction element.
 * @param te		transaction element
 * @param tag		dependency tag
 * @return		dependency tag set
 */
rpmds rpmteDS(rpmte te, rpmTag tag);

/** \ingroup rpmte
 * Retrieve file info tag set from transaction element.
 * @param te		transaction element
 * @return		file info tag set
 */
rpmfi rpmteFI(rpmte te);

/** \ingroup rpmte
 * Calculate transaction element dependency colors/refs from file info.
 * @param te		transaction element
 * @param tag		dependency tag (RPMTAG_PROVIDENAME, RPMTAG_REQUIRENAME)
 */
void rpmteColorDS(rpmte te, rpmTag tag);

/** \ingroup rpmte
 * Return transaction element index.
 * @param tsi		transaction element iterator
 * @return		transaction element index
 */
int rpmtsiOc(rpmtsi tsi);

/** \ingroup rpmte
 * Destroy transaction element iterator.
 * @param tsi		transaction element iterator
 * @return		NULL always
 */
rpmtsi rpmtsiFree(rpmtsi tsi);

/** \ingroup rpmte
 * Create transaction element iterator.
 * @param ts		transaction set
 * @return		transaction element iterator
 */
rpmtsi rpmtsiInit(rpmts ts);

/** \ingroup rpmte
 * Return next transaction element of type.
 * @param tsi		transaction element iterator
 * @param type		transaction element type selector (0 for any)
 * @return		next transaction element of type, NULL on termination
 */
rpmte rpmtsiNext(rpmtsi tsi, rpmElementType type);

#ifdef __cplusplus
}
#endif

#endif	/* H_RPMTE */