# Written by Arno Bakker 
# see LICENSE.txt for license information
""" Simple definitions for the Tribler Core. """
import os

DLSTATUS_ALLOCATING_DISKSPACE = 0 # TODO: make sure this get set when in this alloc mode
DLSTATUS_WAITING4HASHCHECK = 1
DLSTATUS_HASHCHECKING = 2
DLSTATUS_DOWNLOADING = 3
DLSTATUS_SEEDING = 4
DLSTATUS_STOPPED = 5
DLSTATUS_STOPPED_ON_ERROR = 6

dlstatus_strings = ['DLSTATUS_ALLOCATING_DISKSPACE',
'DLSTATUS_WAITING4HASHCHECK', 
'DLSTATUS_HASHCHECKING',
'DLSTATUS_DOWNLOADING',
'DLSTATUS_SEEDING',
'DLSTATUS_STOPPED',
'DLSTATUS_STOPPED_ON_ERROR']

UPLOAD = 'up'
DOWNLOAD = 'down'

DLMODE_NORMAL = 0
DLMODE_VOD = 1

PERSISTENTSTATE_CURRENTVERSION = 2

STATEDIR_ITRACKER_DIR = 'itracker'
STATEDIR_DLPSTATE_DIR = 'dlcheckpoints'
STATEDIR_PEERICON_DIR = 'icons'
STATEDIR_TORRENTCOLL_DIR = 'collected_torrent_files'
STATEDIR_SESSCONFIG = 'sessconfig.pickle'
DESTDIR_COOPDOWNLOAD = 'downloadhelp' 

TRIBLER_TORRENT_EXT = ".tribe"

# For observer/callback mechanism, see Session.add_observer()
   
# subjects
NTFY_PEERS = 'peers'
NTFY_TORRENTS = 'torrents'
NTFY_YOUTUBE = 'youtube'
NTFY_PREFERENCES = 'preferences'
NTFY_SUPERPEERS = 'superpeers' # use NTFY_PEERS !!
NTFY_FRIENDS = 'friends'       # use NTFY_PEERS !!
NTFY_MYPREFERENCES = 'mypreferences' # currently not observable
NTFY_BARTERCAST = 'bartercast' # currently not observable
NTFY_MYINFO = 'myinfo'

# non data handler subjects
NTFY_DOWNLOADS = 'downloads'   # a torrent download was added/removed/changed
NTFY_ACTIVITIES = 'activities' # an activity was set (peer met/dns resolved)
NTFY_REACHABLE = 'reachable'   # the Session is reachable from the Internet

# changeTypes
NTFY_UPDATE = 'update'         # data is updated
NTFY_INSERT = 'insert'         # new data is inserted
NTFY_DELETE = 'delete'         # data is deleted
NTFY_SEARCH_RESULT = 'search_result'     # new search result
NTFY_CONNECTION = 'connection' # connection made or broken

# object IDs for NTFY_ACTIVITIES subject 
NTFY_ACT_NONE = 0
NTFY_ACT_UPNP = 1
NTFY_ACT_REACHABLE = 2
NTFY_ACT_GET_EXT_IP_FROM_PEERS = 3
NTFY_ACT_MEET = 4
NTFY_ACT_GOT_METADATA = 5
NTFY_ACT_RECOMMEND = 6
NTFY_ACT_DISK_FULL = 7
NTFY_ACT_NEW_VERSION = 8
 
# Disk-allocation policies for download, see DownloadConfig.set_alloc_type
DISKALLOC_NORMAL = 'normal'              
DISKALLOC_BACKGROUND = 'background'      
DISKALLOC_PREALLOCATE = 'pre-allocate'
DISKALLOC_SPARSE = 'sparse'

# UPnP modes, see SessionConfig.set_upnp_mode
UPNPMODE_DISABLED = 0
UPNPMODE_WIN32_HNetCfg_NATUPnP = 1
UPNPMODE_WIN32_UPnP_UPnPDeviceFinder = 2
UPNPMODE_UNIVERSAL_DIRECT = 3

# Buddycast Collecting Policy parameters
BCCOLPOLICY_SIMPLE = 1
# BCCOLPOLICY_T4T = 2 # Future work

# Internal tracker scrape
ITRACKSCRAPE_ALLOW_NONE = 'none'
ITRACKSCRAPE_ALLOW_SPECIFIC = 'specific'
ITRACKSCRAPE_ALLOW_FULL = 'full'

ITRACKDBFORMAT_BENCODE = 'bencode'
ITRACKDBFORMAT_PICKLE= 'pickle'

ITRACKMULTI_ALLOW_NONE = 'none'
ITRACKMULTI_ALLOW_AUTODETECT = 'autodetect'
ITRACKMULTI_ALLOW_ALL = 'all'

ITRACK_IGNORE_ANNOUNCEIP_NEVER = 0
ITRACK_IGNORE_ANNOUNCEIP_ALWAYS = 1
ITRACK_IGNORE_ANNOUNCEIP_IFNONATCHECK = 2

# Cooperative download
COOPDL_ROLE_COORDINATOR = 'coordinator'
COOPDL_ROLE_HELPER = 'helper'

# Methods for authentication of the source in live streaming
LIVE_AUTHMETHOD_NONE = "None"   # None
LIVE_AUTHMETHOD_ECDSA = "ECDSA" # Elliptic Curve DSA signatures

# Video-On-Demand / live events
VODEVENT_START = "start"
VODEVENT_PAUSE = "pause"
VODEVENT_RESUME = "resume"