# Author: Nic Wolfe <nic@wolfeden.ca>
# URL: http://code.google.com/p/sickbeard/
#
# This file is part of Sick Beard.
#
# Sick Beard is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Sick Beard is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Sick Beard.  If not, see <http://www.gnu.org/licenses/>.

import os.path
import operator
import platform
import re
import uuid

from sickbeard import version

INSTANCE_ID = str(uuid.uuid1())
USER_AGENT = ('Sick Beard/' + version.SICKBEARD_VERSION.replace(' ', '-') +
             ' (' + platform.system() + '; ' + platform.release() +
             '; ' + INSTANCE_ID + ')')

mediaExtensions = ['avi', 'mkv', 'mpg', 'mpeg', 'wmv',
                   'ogm', 'mp4', 'iso', 'img', 'divx',
                   'm2ts', 'm4v', 'ts', 'flv', 'f4v',
                   'mov', 'rmvb', 'vob', 'dvr-ms', 'wtv',
                   'ogv', '3gp']

subtitleExtensions = ['srt', 'sub', 'ass', 'idx', 'ssa']

### Other constants
MULTI_EP_RESULT = -1
SEASON_RESULT = -2

### Notification Types
NOTIFY_SNATCH = 1
NOTIFY_DOWNLOAD = 2
NOTIFY_SUBTITLE_DOWNLOAD = 3

notifyStrings = {}
notifyStrings[NOTIFY_SNATCH] = "Started Download"
notifyStrings[NOTIFY_DOWNLOAD] = "Download Finished"
notifyStrings[NOTIFY_SUBTITLE_DOWNLOAD] = "Subtitle Download Finished"

### Episode statuses
UNKNOWN = -1 # should never happen
UNAIRED = 1 # episodes that haven't aired yet
SNATCHED = 2 # qualified with quality
WANTED = 3 # episodes we don't have but want to get
DOWNLOADED = 4 # qualified with quality
SKIPPED = 5 # episodes we don't want
ARCHIVED = 6 # episodes that you don't have locally (counts toward download completion stats)
IGNORED = 7 # episodes that you don't want included in your download stats
SNATCHED_PROPER = 9 # qualified with quality
SUBTITLED = 10 # qualified with quality
FAILED = 11 #episode downloaded or snatched we don't want
SNATCHED_BEST = 12 # episode redownloaded using best quality

NAMING_REPEAT = 1
NAMING_EXTEND = 2
NAMING_DUPLICATE = 4
NAMING_LIMITED_EXTEND = 8
NAMING_SEPARATED_REPEAT = 16
NAMING_LIMITED_EXTEND_E_PREFIXED = 32

multiEpStrings = {}
multiEpStrings[NAMING_REPEAT] = "Repeat"
multiEpStrings[NAMING_SEPARATED_REPEAT] = "Repeat (Separated)"
multiEpStrings[NAMING_DUPLICATE] = "Duplicate"
multiEpStrings[NAMING_EXTEND] = "Extend"
multiEpStrings[NAMING_LIMITED_EXTEND] = "Extend (Limited)"
multiEpStrings[NAMING_LIMITED_EXTEND_E_PREFIXED] = "Extend (Limited, E-prefixed)"

### Notification Types
INDEXER_TVDB = "Tvdb"
INDEXER_TVRAGE = "TVRage"

indexerStrings = {}
indexerStrings[INDEXER_TVDB] = "TheTVDB"
indexerStrings[INDEXER_TVRAGE] = "TVRage"

class Quality:
    NONE = 0              # 0                                         
    SDTV = 1              # 1                                         
    SDDVD = 1 << 1        # 2                                         
    HDTV = 1 << 2         # 4                                         
    RAWHDTV = 1 << 3      # 8  -- 720p/1080i mpeg2 (trollhd releases) 
    FULLHDTV = 1 << 4     # 16 -- 1080p HDTV (QCF releases)           
    HDWEBDL = 1 << 5      # 32                                        
    FULLHDWEBDL = 1 << 6  # 64 -- 1080p web-dl                        
    HDBLURAY = 1 << 7     # 128                                       
    FULLHDBLURAY = 1 << 8 # 256                                       

    # put these bits at the other end of the spectrum, far enough out that they shouldn't interfere
    UNKNOWN = 1 << 15     # 32768

    qualityStrings = {NONE: "N/A",
                      UNKNOWN: "Unknown",
                      SDTV: "SD TV",
                      SDDVD: "SD DVD",
                      HDTV: "HD TV",
                      RAWHDTV: "RawHD TV",
                      FULLHDTV: "1080p HD TV",
                      HDWEBDL: "720p WEB-DL",
                      FULLHDWEBDL: "1080p WEB-DL",
                      HDBLURAY: "720p BluRay",
                      FULLHDBLURAY: "1080p BluRay"}

    statusPrefixes = {DOWNLOADED: "Downloaded",
                      SNATCHED: "Snatched",
                      SNATCHED_PROPER: "Snatched (Proper)",
                      FAILED: "Failed",
                      SNATCHED_BEST: "Snatched (Best)"}

    @staticmethod
    def _getStatusStrings(status):
        toReturn = {}
        for x in Quality.qualityStrings.keys():
            toReturn[Quality.compositeStatus(status, x)] = Quality.statusPrefixes[status] + " (" + Quality.qualityStrings[x] + ")"
        return toReturn

    @staticmethod
    def combineQualities(anyQualities, bestQualities):
        anyQuality = 0
        bestQuality = 0
        if anyQualities:
            anyQuality = reduce(operator.or_, anyQualities)
        if bestQualities:
            bestQuality = reduce(operator.or_, bestQualities)
        return anyQuality | (bestQuality << 16)

    @staticmethod
    def splitQuality(quality):
        anyQualities = []
        bestQualities = []
        for curQual in Quality.qualityStrings.keys():
            if curQual & quality:
                anyQualities.append(curQual)
            if curQual << 16 & quality:
                bestQualities.append(curQual)

        return (sorted(anyQualities), sorted(bestQualities))

    @staticmethod
    def nameQuality(name):
        """
        Return The quality from an episode File renamed by Sickbeard
        If no quality is achieved it will try sceneQuality regex
        """
        
        name = os.path.basename(name)

        # if we have our exact text then assume we put it there
        for x in sorted(Quality.qualityStrings.keys(), reverse=True):
            if x == Quality.UNKNOWN:
                continue
            if x == Quality.NONE: #Last chance  
                return Quality.sceneQuality(name)
                
            regex = '\W' + Quality.qualityStrings[x].replace(' ','\W') + '\W'
            regex_match = re.search(regex, name, re.I)
            if regex_match:
                return x
        
    @staticmethod
    def sceneQuality(name):
        """
        Return The quality from the scene episode File 
        """

        name = os.path.basename(name)

        checkName = lambda list, func: func([re.search(x, name, re.I) for x in list])

        if checkName(["(pdtv|hdtv|dsr|tvrip).(xvid|x264|h.?264)"], all) and not checkName(["(720|1080)[pi]"], all):
            return Quality.SDTV
        elif checkName(["web.dl|webrip", "xvid|x264|h.?264"], all) and not checkName(["(720|1080)[pi]"], all):
            return Quality.SDTV
        elif checkName(["(dvdrip|b[r|d]rip)(.ws)?.(xvid|divx|x264)"], any) and not checkName(["(720|1080)[pi]"], all):
            return Quality.SDDVD
        elif checkName(["720p", "hdtv", "x264"], all) or checkName(["hr.ws.pdtv.x264"], any) and not checkName(["(1080)[pi]"], all):          
            return Quality.HDTV                                                                        
        elif checkName(["720p|1080i", "hdtv", "mpeg-?2"], all) or checkName(["1080i.hdtv", "h.?264"], all):
            return Quality.RAWHDTV                                                                     
        elif checkName(["1080p", "hdtv", "x264"], all):         
            return Quality.FULLHDTV                                                                    
        elif checkName(["720p", "web.dl", "h.?264"], all) or checkName(["720p", "itunes", "h.?264"], all):
            return Quality.HDWEBDL                                                                     
        elif checkName(["1080p", "web.dl", "h.?264"], all) or checkName(["1080p", "itunes", "h.?264"], all):     
            return Quality.FULLHDWEBDL                                                                 
        elif checkName(["720p", "webrip", "x264"], all):
            return Quality.HDWEBDL                                                                     
        elif checkName(["1080p", "webrip", "x264"], all):
            return Quality.FULLHDWEBDL        
        elif checkName(["720p", "bluray|hddvd|b[r|d]rip", "x264"], all):
            return Quality.HDBLURAY                                                                    
        elif checkName(["1080p", "bluray|hddvd|b[r|d]rip", "x264"], all):
            return Quality.FULLHDBLURAY
        else:
            return Quality.UNKNOWN

    @staticmethod
    def assumeQuality(name):
        if name.lower().endswith((".avi", ".mp4")):
            return Quality.SDTV
#        elif name.lower().endswith(".mkv"):
#            return Quality.HDTV
        elif name.lower().endswith(".ts"):
            return Quality.RAWHDTV
        else:
            return Quality.UNKNOWN

    @staticmethod
    def compositeStatus(status, quality):
        return status + 100 * quality

    @staticmethod
    def qualityDownloaded(status):
        return (status - DOWNLOADED) / 100

    @staticmethod
    def splitCompositeStatus(status):
        """Returns a tuple containing (status, quality)"""
        if status == UNKNOWN:
            return (UNKNOWN, Quality.UNKNOWN)
        
        for x in sorted(Quality.qualityStrings.keys(), reverse=True):
            if status > x * 100:
                return (status - x * 100, x)

        return (status, Quality.NONE)

    @staticmethod
    def statusFromName(name, assume=True):
        quality = Quality.nameQuality(name)
        if assume and quality == Quality.UNKNOWN:
            quality = Quality.assumeQuality(name)
        return Quality.compositeStatus(DOWNLOADED, quality)

    DOWNLOADED = None
    SNATCHED = None
    SNATCHED_PROPER = None
    FAILED = None
    SNATCHED_BEST = None

Quality.DOWNLOADED = [Quality.compositeStatus(DOWNLOADED, x) for x in Quality.qualityStrings.keys()]
Quality.SNATCHED = [Quality.compositeStatus(SNATCHED, x) for x in Quality.qualityStrings.keys()]
Quality.SNATCHED_PROPER = [Quality.compositeStatus(SNATCHED_PROPER, x) for x in Quality.qualityStrings.keys()]
Quality.FAILED = [Quality.compositeStatus(FAILED, x) for x in Quality.qualityStrings.keys()]
Quality.SNATCHED_BEST = [Quality.compositeStatus(SNATCHED_BEST, x) for x in Quality.qualityStrings.keys()]

SD = Quality.combineQualities([Quality.SDTV, Quality.SDDVD], [])                                                                                                                                          
HD = Quality.combineQualities([Quality.HDTV, Quality.FULLHDTV, Quality.HDWEBDL, Quality.FULLHDWEBDL, Quality.HDBLURAY, Quality.FULLHDBLURAY], []) # HD720p + HD1080p                                      
HD720p = Quality.combineQualities([Quality.HDTV, Quality.HDWEBDL, Quality.HDBLURAY], [])                                                                                                                  
HD1080p = Quality.combineQualities([Quality.FULLHDTV, Quality.FULLHDWEBDL, Quality.FULLHDBLURAY], [])                                                                                                     
ANY = Quality.combineQualities([Quality.SDTV, Quality.SDDVD, Quality.HDTV, Quality.FULLHDTV, Quality.HDWEBDL, Quality.FULLHDWEBDL, Quality.HDBLURAY, Quality.FULLHDBLURAY, Quality.UNKNOWN], []) # SD + HD
                                                                                                                                                                                                          
# legacy template, cant remove due to reference in mainDB upgrade?                                                                                                                                        
BEST = Quality.combineQualities([Quality.SDTV, Quality.HDTV, Quality.HDWEBDL], [Quality.HDTV])

qualityPresets = (SD, HD, HD720p, HD1080p, ANY)
qualityPresetStrings = {SD: "SD",
                        HD: "HD",
                        HD720p: "HD720p",
                        HD1080p: "HD1080p",
                        ANY: "Any"}

class StatusStrings:
    def __init__(self):
        self.statusStrings = {UNKNOWN: "Unknown",
                              UNAIRED: "Unaired",
                              SNATCHED: "Snatched",
                              DOWNLOADED: "Downloaded",
                              SKIPPED: "Skipped",
                              SNATCHED_PROPER: "Snatched (Proper)",
                              WANTED: "Wanted",
                              ARCHIVED: "Archived",
                              IGNORED: "Ignored",
                              SUBTITLED: "Subtitled",
                              FAILED: "Failed",
                              SNATCHED_BEST: "Snatched (Best)"}

    def __getitem__(self, name):
        if name in Quality.DOWNLOADED + Quality.SNATCHED + Quality.SNATCHED_PROPER + Quality.SNATCHED_BEST:
            status, quality = Quality.splitCompositeStatus(name)
            if quality == Quality.NONE:
                return self.statusStrings[status]
            else:
                return self.statusStrings[status] + " (" + Quality.qualityStrings[quality] + ")"
        else:
            return self.statusStrings[name] if self.statusStrings.has_key(name) else ''

    def has_key(self, name):
        return name in self.statusStrings or name in Quality.DOWNLOADED or name in Quality.SNATCHED or name in Quality.SNATCHED_PROPER or name in Quality.SNATCHED_BEST

statusStrings = StatusStrings()

class Overview:
    UNAIRED = UNAIRED # 1
    QUAL = 2
    WANTED = WANTED # 3
    GOOD = 4
    SKIPPED = SKIPPED # 5
    
    # For both snatched statuses. Note: SNATCHED/QUAL have same value and break dict.
    SNATCHED = SNATCHED_PROPER = SNATCHED_BEST  # 9
    
    overviewStrings = {SKIPPED: "skipped",
                       WANTED: "wanted",
                       QUAL: "qual",
                       GOOD: "good",
                       UNAIRED: "unaired",
                       SNATCHED: "snatched"}

# Get our xml namespaces correct for lxml
XML_NSMAP = {'xsi': 'http://www.w3.org/2001/XMLSchema-instance',
             'xsd': 'http://www.w3.org/2001/XMLSchema'}


countryList = {'Australia': 'AU',
               'Canada': 'CA',
               'USA': 'US'
               }