/******************************************************************************
 * $Id$
 *
 * Copyright (c) 2006-2008 Transmission authors and contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *****************************************************************************/

#include <string.h>
#include <unistd.h>

#include <gtk/gtk.h>
#include <glib/gi18n.h>

#include <libtransmission/transmission.h>

#include "tr-prefs.h"
#include "tr-torrent.h"
#include "conf.h"
#include "notify.h"
#include "util.h"

struct TrTorrentPrivate
{
    tr_torrent *  handle;
    gboolean      do_remove;
};


static void
tr_torrent_init( GTypeInstance *  instance,
                 gpointer g_class UNUSED )
{
    TrTorrent *               self = TR_TORRENT( instance );
    struct TrTorrentPrivate * p;

    p = self->priv = G_TYPE_INSTANCE_GET_PRIVATE( self,
                                                  TR_TORRENT_TYPE,
                                                  struct TrTorrentPrivate );
    p->handle = NULL;

#ifdef REFDBG
    g_message( "torrent %p init", self );
#endif
}

static int
isDisposed( const TrTorrent * tor )
{
    return !tor || !TR_IS_TORRENT( tor ) || !tor->priv;
}

static void
tr_torrent_dispose( GObject * o )
{
    GObjectClass * parent;
    TrTorrent *    self = TR_TORRENT( o );

    if( !isDisposed( self ) )
    {
        if( self->priv->handle )
        {
            if( self->priv->do_remove )
                tr_torrentRemove( self->priv->handle );
            else
                tr_torrentFree( self->priv->handle );
        }

        self->priv = NULL;
    }

    parent = g_type_class_peek( g_type_parent( TR_TORRENT_TYPE ) );
    parent->dispose( o );
}

void
tr_torrent_clear( TrTorrent * tor )
{
    g_return_if_fail( tor );
    g_return_if_fail( tor->priv );

    tor->priv->handle = NULL;
}

static void
tr_torrent_class_init( gpointer              g_class,
                       gpointer g_class_data UNUSED )
{
    GObjectClass *gobject_class = G_OBJECT_CLASS( g_class );

    gobject_class->dispose = tr_torrent_dispose;
    g_type_class_add_private( g_class, sizeof( struct TrTorrentPrivate ) );
}

GType
tr_torrent_get_type( void )
{
    static GType type = 0;

    if( !type )
    {
        static const GTypeInfo info = {
            sizeof ( TrTorrentClass ),
            NULL,                     /* base_init */
            NULL,                     /* base_finalize */
            tr_torrent_class_init,    /* class_init */
            NULL,                     /* class_finalize */
            NULL,                     /* class_data */
            sizeof ( TrTorrent ),
            0,                        /* n_preallocs */
            tr_torrent_init,          /* instance_init */
            NULL,
        };
        type = g_type_register_static( G_TYPE_OBJECT, "TrTorrent", &info, 0 );
    }
    return type;
}

tr_torrent *
tr_torrent_handle( TrTorrent *tor )
{
    return isDisposed( tor ) ? NULL : tor->priv->handle;
}

const tr_stat *
tr_torrent_stat( TrTorrent *tor )
{
    tr_torrent * handle = tr_torrent_handle( tor );

    return handle ? tr_torrentStatCached( handle ) : NULL;
}

const tr_info *
tr_torrent_info( TrTorrent * tor )
{
    tr_torrent * handle = tr_torrent_handle( tor );

    return handle ? tr_torrentInfo( handle ) : NULL;
}

static gboolean
notifyInMainThread( gpointer user_data )
{
    tr_notify_send( TR_TORRENT( user_data ) );
    return FALSE;
}

static void
statusChangedCallback( tr_torrent   * tor UNUSED,
                       cp_status_t        status,
                       void *             user_data )
{
    if( status == TR_CP_COMPLETE )
        g_idle_add( notifyInMainThread, user_data );
}

static TrTorrent *
maketorrent( tr_torrent * handle )
{
    TrTorrent * tor = g_object_new( TR_TORRENT_TYPE, NULL );

    tor->priv->handle = handle;
    tr_torrentSetStatusCallback( handle, statusChangedCallback, tor );
    return tor;
}

TrTorrent*
tr_torrent_new_preexisting( tr_torrent * tor )
{
    return maketorrent( tor );
}

TrTorrent *
tr_torrent_new_ctor( tr_handle * handle,
                     tr_ctor *   ctor,
                     char **     err )
{
    tr_torrent * tor;
    int          errcode;
    uint8_t      doTrash = FALSE;

    errcode = -1;
    *err = NULL;

    /* let the gtk client handle the removal, since libT
     * doesn't have any concept of the glib trash API */
    tr_ctorGetDeleteSource( ctor, &doTrash );
    tr_ctorSetDeleteSource( ctor, FALSE );
    tor = tr_torrentNew( handle, ctor, &errcode );

    if( tor && doTrash )
        tr_file_trash_or_unlink( tr_ctorGetSourceFile( ctor ) );

    if( !tor )
    {
        const char * filename = tr_ctorGetSourceFile( ctor );
        if( !filename )
            filename = "(null)";

        switch( errcode )
        {
            case TR_EINVALID:
                *err =
                    g_strdup_printf( _(
                                         "File \"%s\" isn't a valid torrent" ),
                                     filename );
                break;

            case TR_EDUPLICATE:
                *err = g_strdup_printf( _(
                                            "File \"%s\" is already open" ),
                                        filename );
                break;

            default:
                *err = g_strdup( filename );
                break;
        }

        return NULL;
    }

    return maketorrent( tor );
}

char *
tr_torrent_status_str( TrTorrent * gtor )
{
    char *          top = NULL;

    const tr_stat * st = tr_torrent_stat( gtor );

    const int       tpeers = MAX ( st->peersConnected, 0 );
    const int       upeers = MAX ( st->peersGettingFromUs, 0 );
    const int       eta = st->eta;
    double          prog = st->percentDone * 100.0; /* [0...100] */

    switch( st->status )
    {
        case TR_STATUS_CHECK_WAIT:
            prog = st->recheckProgress * 100.0; /* [0...100] */
            top =
                g_strdup_printf( _(
                                     "Waiting to verify local data (%.1f%% tested)" ),
                                 prog );
            break;

        case TR_STATUS_CHECK:
            prog = st->recheckProgress * 100.0; /* [0...100] */
            top =
                g_strdup_printf( _(
                                     "Verifying local data (%.1f%% tested)" ),
                                 prog );
            break;

        case TR_STATUS_DOWNLOAD:

            if( eta < 0 )
                top = g_strdup_printf( _(
                                           "Remaining time unknown (%.1f%%)" ),
                                       prog );
            else
            {
                char timestr[128];
                tr_strltime( timestr, eta, sizeof( timestr ) );
                /* %1$s is # of minutes
                   %2$.1f is a percentage of how much of the torrent is done */
                top = g_strdup_printf( _(
                                           "%1$s remaining (%2$.1f%%)" ),
                                       timestr, prog );
            }
            break;

        case TR_STATUS_SEED:
            top = g_strdup_printf(
                ngettext( "Seeding to %1$'d of %2$'d connected peer",
                          "Seeding to %1$'d of %2$'d connected peers",
                          tpeers ),
                upeers, tpeers );
            break;

        case TR_STATUS_STOPPED:
            top = g_strdup_printf( _( "Stopped (%.1f%%)" ), prog );
            break;

        default:
            top = g_strdup_printf( "???" );
            break;
    }

    return top;
}

void
tr_torrent_set_remove_flag( TrTorrent * gtor,
                            gboolean    do_remove )
{
    if( !isDisposed( gtor ) )
        gtor->priv->do_remove = do_remove;
}

void
tr_torrent_delete_files( TrTorrent * gtor )
{
    tr_file_index_t i;
    const tr_info * info = tr_torrent_info( gtor );
    const char *    stop =
        tr_torrentGetDownloadDir( tr_torrent_handle( gtor ) );

    for( i = 0; info && i < info->fileCount; ++i )
    {
        char * file = g_build_filename( stop, info->files[i].name, NULL );
        while( strcmp( stop, file ) && strlen( stop ) < strlen( file ) )
        {
            char * swap = g_path_get_dirname( file );
            tr_file_trash_or_unlink( file );
            g_free( file );
            file = swap;
        }

        g_free( file );
    }
}

void
tr_torrent_open_folder( TrTorrent * gtor )
{
    tr_torrent *    tor = tr_torrent_handle( gtor );
    const tr_info * info = tr_torrent_info( gtor );
    char *          path = info->fileCount == 1
                           ? g_build_filename( tr_torrentGetDownloadDir(
                                                   tor ), NULL )
                           : g_build_filename( tr_torrentGetDownloadDir(
                                                   tor ), info->name, NULL );

    gtr_open_file( path );
    g_free( path );
}