/*
 * This file Copyright (C) 2009-2014 Mnemosyne LLC
 *
 * It may be used under the GNU GPL versions 2 or 3
 * or any future license endorsed by Mnemosyne LLC.
 *
 * $Id$
 */

#ifndef __TRANSMISSION__
 #error only libtransmission should #include this header.
#endif

#ifndef TR_COMPLETION_H
#define TR_COMPLETION_H

#include "transmission.h"
#include "bitfield.h"
#include "utils.h" /* tr_getRatio () */

typedef struct tr_completion
{
  tr_torrent * tor;

  tr_bitfield blockBitfield;

  /* number of bytes we'll have when done downloading. [0..info.totalSize]
     DON'T access this directly; it's a lazy field.
     use tr_cpSizeWhenDone () instead! */
  uint64_t sizeWhenDoneLazy;

  /* whether or not sizeWhenDone needs to be recalculated */
  bool sizeWhenDoneIsDirty;

  /* number of bytes we'll have when done downloading. [0..info.totalSize]
     DON'T access this directly; it's a lazy field.
     use tr_cpHaveValid () instead! */
  uint64_t haveValidLazy;

  /* whether or not haveValidLazy needs to be recalculated */
  bool haveValidIsDirty;

  /* number of bytes we want or have now. [0..sizeWhenDone] */
  uint64_t sizeNow;
}
tr_completion;

/**
*** Life Cycle
**/

void  tr_cpConstruct (tr_completion *, tr_torrent *);

void  tr_cpBlockInit (tr_completion * cp, const tr_bitfield * blocks);

static inline void
tr_cpDestruct (tr_completion * cp)
{
  tr_bitfieldDestruct (&cp->blockBitfield);
}

/**
*** General
**/

double            tr_cpPercentComplete (const tr_completion * cp);

double            tr_cpPercentDone (const tr_completion * cp);

tr_completeness   tr_cpGetStatus (const tr_completion *);

uint64_t          tr_cpHaveValid (const tr_completion *);

uint64_t          tr_cpSizeWhenDone (const tr_completion *);

uint64_t          tr_cpLeftUntilDone (const tr_completion *);

void              tr_cpGetAmountDone (const   tr_completion * completion,
                                      float                 * tab,
                                      int                     tabCount);


static inline uint64_t
tr_cpHaveTotal (const tr_completion * cp)
{
  return cp->sizeNow;
}

static inline bool tr_cpHasAll (const tr_completion * cp)
{
  return tr_torrentHasMetadata (cp->tor)
      && tr_bitfieldHasAll (&cp->blockBitfield);
}

static inline bool tr_cpHasNone (const tr_completion * cp)
{
  return !tr_torrentHasMetadata (cp->tor)
      || tr_bitfieldHasNone (&cp->blockBitfield);
}

/**
***  Pieces
**/

void    tr_cpPieceAdd (tr_completion * cp, tr_piece_index_t i);

void    tr_cpPieceRem (tr_completion * cp, tr_piece_index_t i);

size_t  tr_cpMissingBlocksInPiece (const tr_completion *, tr_piece_index_t);

size_t  tr_cpMissingBytesInPiece (const tr_completion *, tr_piece_index_t);

static inline bool
tr_cpPieceIsComplete (const tr_completion * cp, tr_piece_index_t i)
{
  return tr_cpMissingBlocksInPiece (cp, i) == 0;
}

/**
***  Blocks
**/

void  tr_cpBlockAdd (tr_completion * cp, tr_block_index_t i);

static inline bool
tr_cpBlockIsComplete (const tr_completion * cp, tr_block_index_t i)
{
  return tr_bitfieldHas (&cp->blockBitfield, i);
}

/***
****  Misc
***/

bool  tr_cpFileIsComplete (const tr_completion * cp, tr_file_index_t);

void* tr_cpCreatePieceBitfield (const tr_completion * cp, size_t * byte_count);

static inline void
tr_cpInvalidateDND (tr_completion * cp)
{
  cp->sizeWhenDoneIsDirty = true;
}


#endif