#!/usr/bin/env python

__author__ = "Abhinav Sarkar <abhinav@abhinavsarkar.net>"
__version__ = "0.2"
__license__ = "GNU Lesser General Public License"
__package__ = "lastfm"

from lastfm.base import LastfmBase
from lastfm.mixin import chartable, mixin
import lastfm.playlist
from lastfm.decorators import (
    cached_property, top_property, authentication_required, depaginate)

@chartable('album', 'artist', 'track', 'tag')
@mixin("crawlable", "shoutable", "cacheable", "property_adder")
class User(LastfmBase):
    """A class representing an user."""
    
    class Meta(object):
        properties = ["name", "real_name",
            "url", "image", "stats"]
        
    def init(self, api, **kwargs):
        if not isinstance(api, Api):
            raise InvalidParametersError("api reference must be supplied as an argument")
        
        self._api = api
        super(User, self).init(**kwargs)
        self._stats = hasattr(self, "_stats") and Stats(
            subject = self,
            match = self._stats.match,
            weight = self._stats.weight,
            playcount = self._stats.playcount
        ) or None
        self._library = User.Library(api, self)

    @property
    @authentication_required
    def language(self):
        """lang for the user"""
        return self._language

    @property
    @authentication_required
    def country(self):
        """country for the user"""
        return self._country

    @property
    @authentication_required
    def age(self):
        """age for the user"""
        return self._age

    @property
    @authentication_required
    def gender(self):
        """stats for the user"""
        return self._gender

    @property
    @authentication_required
    def subscriber(self):
        """is the user a subscriber"""
        return self._subscriber
    
    @property
    def authenticated(self):
        """is the user authenticated"""
        try:
            auth_user = self._api.get_authenticated_user()
            return auth_user == self
        except AuthenticationFailedError:
            return False        

    @cached_property
    def events(self):
        params = self._default_params({'method': 'user.getEvents'})
        data = self._api._fetch_data(params).find('events')

        return [
                Event.create_from_data(self._api, e)
                for e in data.findall('event')
                ]
        
    @depaginate
    def get_past_events(self, limit = None, page = None):
        params = self._default_params({'method': 'user.getPastEvents'})
        if limit is not None:
            params.update({'limit': limit})
        if page is not None:
            params.update({'page': page})

        data = self._api._fetch_data(params).find('events')
        total_pages = int(data.attrib['totalPages'])
        yield total_pages
        for e in data.findall('event'):
            yield Event.create_from_data(self._api, e)

    @cached_property
    def past_events(self):
        return self.get_past_events()
    
    @authentication_required
    @depaginate
    def get_recommended_events(self, limit = None, page = None):
        params = {'method': 'user.getRecommendedEvents'}
        if limit is not None:
            params.update({'limit': limit})
        if page is not None:
            params.update({'page': page})
        data = self._api._fetch_data(params, sign = True, session = True).find('events')
        total_pages = int(data.attrib['totalPages'])
        yield total_pages
        for e in data.findall('event'):
            yield Event.create_from_data(self._api, e)

    @cached_property
    def recommended_events(self):
        return self.get_recommended_events()
    
    def get_friends(self,
                   limit = None):
        params = self._default_params({'method': 'user.getFriends'})
        if limit is not None:
            params.update({'limit': limit})
        data = self._api._fetch_data(params).find('friends')
        return [
            User(
                self._api,
                subject = self,
                name = u.findtext('name'),
                real_name = u.findtext('realname'),
                image = dict([(i.get('size'), i.text) for i in u.findall('image')]),
                url = u.findtext('url'),
            )
            for u in data.findall('user')
        ]


    @cached_property
    def friends(self):
        """friends of the user"""
        return self.get_friends()

    def get_neighbours(self, limit = None):
        params = self._default_params({'method': 'user.getNeighbours'})
        if limit is not None:
            params.update({'limit': limit})
        data = self._api._fetch_data(params).find('neighbours')
        return [
                User(
                    self._api,
                    subject = self,
                    name = u.findtext('name'),
                    real_name = u.findtext('realname'),
                    image = {'medium': u.findtext('image')},
                    url = u.findtext('url'),
                    stats = Stats(
                                  subject = u.findtext('name'),
                                  match = u.findtext('match') and float(u.findtext('match')),
                                  ),
                )
                for u in data.findall('user')
            ]

    @cached_property
    def neighbours(self):
        """neighbours of the user"""
        return self.get_neighbours()

    @top_property("neighbours")
    def nearest_neighbour(self):
        """nearest neighbour of the user"""
        pass

    @cached_property
    def playlists(self):
        """playlists of the user"""
        params = self._default_params({'method': 'user.getPlaylists'})
        data = self._api._fetch_data(params).find('playlists')
        return [
                User.Playlist(
                              self._api,
                              id = int(p.findtext('id')),
                              title = p.findtext('title'),
                              date = datetime(*(
                                                time.strptime(
                                                              p.findtext('date').strip(),
                                                              '%Y-%m-%dT%H:%M:%S'
                                                              )[0:6])
                              ),
                              size = int(p.findtext('size')),
                              creator = self
                              )
                for p in data.findall('playlist')
                ]

    @authentication_required
    def create_playlist(self, title, description = None):
        params = {'method': 'playlist.create',
                  'title': title}
        if description is not None:
            params['description'] = description
        self._api._post_data(params)
        self._playlists = None
    
    @cached_property
    def loved_tracks(self):
        params = self._default_params({'method': 'user.getLovedTracks'})
        data = self._api._fetch_data(params).find('lovedtracks')
        return [
                Track(
                    self._api,
                    subject = self,
                    name = t.findtext('name'),
                    artist = Artist(
                        self._api,
                        subject = self,
                        name = t.findtext('artist/name'),
                        mbid = t.findtext('artist/mbid'),
                        url = t.findtext('artist/url'),
                    ),
                    mbid = t.findtext('mbid'),
                    image = dict([(i.get('size'), i.text) for i in t.findall('image')]),
                    loved_on = datetime(*(
                        time.strptime(
                            t.findtext('date').strip(),
                            '%d %b %Y, %H:%M'
                            )[0:6])
                        )
                    )
                for t in data.findall('track')
                ]

    def get_recent_tracks(self, limit = None):
        params = self._default_params({'method': 'user.getRecentTracks'})
        if limit is not None:
            params.update({'limit': limit})
        data = self._api._fetch_data(params, no_cache = True).find('recenttracks')
        return [
                Track(
                      self._api,
                      subject = self,
                      name = t.findtext('name'),
                      artist = Artist(
                                      self._api,
                                      subject = self,
                                      name = t.findtext('artist'),
                                      mbid = t.find('artist').attrib['mbid'],
                                      ),
                      album = Album(
                                    self._api,
                                    subject = self,
                                    name = t.findtext('album'),
                                    artist = Artist(
                                                    self._api,
                                                    subject = self,
                                                    name = t.findtext('artist'),
                                                    mbid = t.find('artist').attrib['mbid'],
                                                    ),
                                    mbid = t.find('album').attrib['mbid'],
                                    ),
                      mbid = t.findtext('mbid'),
                      streamable = (t.findtext('streamable') == '1'),
                      url = t.findtext('url'),
                      image = dict([(i.get('size'), i.text) for i in t.findall('image')]),
                      played_on = datetime(*(
                                           time.strptime(
                                                         t.findtext('date').strip(),
                                                         '%d %b %Y, %H:%M'
                                                         )[0:6])
                                           )
                      )
                      for t in data.findall('track')
                      ]

    @property
    def recent_tracks(self):
        """recent tracks played by the user"""
        return self.get_recent_tracks()

    @top_property("recent_tracks")
    def most_recent_track(self):
        """most recent track played by the user"""
        pass

    def get_top_albums(self, period = None):
        params = self._default_params({'method': 'user.getTopAlbums'})
        if period is not None:
            params.update({'period': period})
        data = self._api._fetch_data(params).find('topalbums')

        return [
                Album(
                     self._api,
                     subject = self,
                     name = a.findtext('name'),
                     artist = Artist(
                                     self._api,
                                     subject = self,
                                     name = a.findtext('artist/name'),
                                     mbid = a.findtext('artist/mbid'),
                                     url = a.findtext('artist/url'),
                                     ),
                     mbid = a.findtext('mbid'),
                     url = a.findtext('url'),
                     image = dict([(i.get('size'), i.text) for i in a.findall('image')]),
                     stats = Stats(
                                   subject = a.findtext('name'),
                                   playcount = a.findtext('playcount').strip() and int(a.findtext('playcount')),
                                   rank = a.attrib['rank'].strip() and int(a.attrib['rank'])
                                   )
                     )
                for a in data.findall('album')
                ]

    @cached_property
    def top_albums(self):
        """overall top albums of the user"""
        return self.get_top_albums()

    @top_property("top_albums")
    def top_album(self):
        """overall top most album of the user"""
        pass

    def get_top_artists(self, period = None):
        params = self._default_params({'method': 'user.getTopArtists'})
        if period is not None:
            params.update({'period': period})
        data = self._api._fetch_data(params).find('topartists')

        return [
                Artist(
                       self._api,
                       subject = self,
                       name = a.findtext('name'),
                       mbid = a.findtext('mbid'),
                       stats = Stats(
                                     subject = a.findtext('name'),
                                     rank = a.attrib['rank'].strip() and int(a.attrib['rank']) or None,
                                     playcount = a.findtext('playcount').strip() and int(a.findtext('playcount')) or None
                                     ),
                       url = a.findtext('url'),
                       streamable = (a.findtext('streamable') == "1"),
                       image = dict([(i.get('size'), i.text) for i in a.findall('image')]),
                       )
                for a in data.findall('artist')
                ]

    @cached_property
    def top_artists(self):
        """top artists of the user"""
        return self.get_top_artists()

    @top_property("top_artists")
    def top_artist(self):
        """top artist of the user"""
        pass
    
    @cached_property
    @authentication_required
    @depaginate
    def recommended_artists(self, page = None):
        params = {'method': 'user.getRecommendedArtists'}
        if page is not None:
            params.update({'page': page})
            
        data = self._api._fetch_data(params, sign = True, session = True).find('recommendations')
        total_pages = int(data.attrib['totalPages'])
        yield total_pages

        for a in data.findall('artist'):
            yield Artist(
                         self._api,
                         name = a.findtext('name'),
                         mbid = a.findtext('mbid'),
                         url = a.findtext('url'),
                         streamable = (a.findtext('streamable') == "1"),
                         image = dict([(i.get('size'), i.text) for i in a.findall('image')]),
                         )
    
    def get_top_tracks(self, period = None):
        params = self._default_params({'method': 'user.getTopTracks'})
        if period is not None:
            params.update({'period': period})
        data = self._api._fetch_data(params).find('toptracks')
        return [
                Track(
                      self._api,
                      subject = self,
                      name = t.findtext('name'),
                      artist = Artist(
                                      self._api,
                                      subject = self,
                                      name = t.findtext('artist/name'),
                                      mbid = t.findtext('artist/mbid'),
                                      url = t.findtext('artist/url'),
                                      ),
                      mbid = t.findtext('mbid'),
                      stats = Stats(
                                    subject = t.findtext('name'),
                                    rank = t.attrib['rank'].strip() and int(t.attrib['rank']) or None,
                                    playcount = t.findtext('playcount') and int(t.findtext('playcount')) or None
                                    ),
                      streamable = (t.findtext('streamable') == '1'),
                      full_track = (t.find('streamable').attrib['fulltrack'] == '1'),
                      image = dict([(i.get('size'), i.text) for i in t.findall('image')]),
                      )
                for t in data.findall('track')
                ]

    @cached_property
    def top_tracks(self):
        """top tracks of the user"""
        return self.get_top_tracks()

    @top_property("top_tracks")
    def top_track(self):
        """top track of the user"""
        pass

    def get_top_tags(self, limit = None):
        params = self._default_params({'method': 'user.getTopTags'})
        if limit is not None:
            params.update({'limit': limit})
        data = self._api._fetch_data(params).find('toptags')
        return [
                Tag(
                    self._api,
                    subject = self,
                    name = t.findtext('name'),
                    url = t.findtext('url'),
                    stats = Stats(
                                  subject = t.findtext('name'),
                                  count = int(t.findtext('count'))
                                  )
                    )
                for t in data.findall('tag')
                ]

    @cached_property
    def top_tags(self):
        """top tags of the user"""
        return self.get_top_tags()

    @top_property("top_tags")
    def top_tag(self):
        """top tag of the user"""
        pass

    def compare(self, other, limit = None):
        if isinstance(other, User):
            other = other.name
        return Tasteometer.compare(self._api,
                                   'user', 'user',
                                   self.name, other,
                                   limit)
    @property
    def library(self):
        return self._library

    @staticmethod
    def get_info(api, name):
        user = User(api, name = name)
        friends = user.friends
        if len(friends) == 0:
            return user
        else:
            f = friends[0]
            try:
                user = [a for a in f.friends if a.name == user.name][0]
                return user
            except IndexError:
                return user
        
    @staticmethod
    def get_authenticated_user(api):
        data = api._fetch_data({'method': 'user.getInfo'}, sign = True, session = True).find('user')
        user = User(
                api,
                name = data.findtext('name'),
                url = data.findtext('url'),
            )
        user._language = data.findtext('lang')
        user._country = Country(api, name = Country.ISO_CODES[data.findtext('country')])
        user._age = int(data.findtext('age'))
        user._gender = data.findtext('gender')
        user._subscriber = (data.findtext('subscriber') == "1")
        user._stats = Stats(subject = user, playcount = data.findtext('playcount'))
        return user
    
    @staticmethod
    def _get_all(seed_user):
        return (seed_user, ['name'],
            lambda api, hsh: User(api, **hsh).neighbours)
        
    def _default_params(self, extra_params = None):
        if not self.name:
            raise InvalidParametersError("user has to be provided.")
        params = {'user': self.name}
        if extra_params is not None:
            params.update(extra_params)
        return params

    @staticmethod
    def _hash_func(*args, **kwds):
        try:
            return hash(kwds['name'])
        except KeyError:
            raise InvalidParametersError("name has to be provided for hashing")

    def __hash__(self):
        return self.__class__._hash_func(name = self.name)

    def __eq__(self, other):
        return self.name == other.name

    def __lt__(self, other):
        return self.name < other.name

    def __repr__(self):
        return "<lastfm.User: %s>" % self.name

    @mixin("property_adder")
    class Playlist(lastfm.playlist.Playlist):
        """A class representing a playlist belonging to the user."""
        
        class Meta(object):
            properties = ["id", "title", "date", "size", "creator"]
            
        def init(self, api, id, title, date, size, creator):
            super(User.Playlist, self).init(api, "lastfm://playlist/%s" % id)
            self._id = id
            self._title = title
            self._date = date
            self._size = size
            self._creator = creator
        
        @property
        def user(self):
            return self._creator

        @authentication_required
        def add_track(self, track, artist = None):
            params = {'method': 'playlist.addTrack', 'playlistID': self.id}
            if isinstance(track, Track):
                params['artist'] = track.artist.name
                params['track'] = track.name
            else:
                if artist is None:
                    track = self._api.search_track(track)[0]
                    params['artist'] = track.artist.name
                    params['track'] = track.name
                else:
                    params['artist'] = isinstance(artist, Artist) and artist.name or artist
                    params['track'] = track
            self._api._post_data(params)
            self._data = None

        @staticmethod
        def _hash_func(*args, **kwds):
            try:
                return hash(kwds['id'])
            except KeyError:
                raise InvalidParametersError("id has to be provided for hashing")

        def __hash__(self):
            return self.__class__._hash_func(id = self.id)

        def __repr__(self):
            return "<lastfm.User.Playlist: %s>" % self.title

    class Library(object):
        """A class representing the music library of the user."""
        def __init__(self, api, user):
            self._api = api
            self._user = user

        @property
        def user(self):
            return self._user

        @depaginate
        def get_albums(self, limit = None, page = None):
            params = self._default_params({'method': 'library.getAlbums'})
            if limit is not None:
                params.update({'limit': limit})
            if page is not None:
                params.update({'page': page})

            try:
                data = self._api._fetch_data(params).find('albums')            
                total_pages = int(data.attrib['totalPages'])
                yield total_pages
    
                for a in data.findall('album'):
                    yield Album(
                                self._api,
                                subject = self,
                                name = a.findtext('name'),
                                artist = Artist(
                                                self._api,
                                                subject = self,
                                                name = a.findtext('artist/name'),
                                                mbid = a.findtext('artist/mbid'),
                                                url = a.findtext('artist/url'),
                                                ),
                                mbid = a.findtext('mbid'),
                                url = a.findtext('url'),
                                image = dict([(i.get('size'), i.text) for i in a.findall('image')]),
                                stats = Stats(
                                              subject = a.findtext('name'),
                                              playcount = int(a.findtext('playcount')),
                                              )
                                )
            except LastfmError:
                yield None

        @cached_property
        def albums(self):
            return self.get_albums()
        
        @authentication_required
        def add_album(self, album, artist = None):
            params = {'method': 'library.addAlbum'}
            if isinstance(album, Album):
                params['artist'] = album.artist.name
                params['album'] = album.name
            else:
                if artist is None:
                    album = self._api.search_album(album)[0]
                    params['artist'] = album.artist.name
                    params['album'] = album.name
                else:
                    params['artist'] = isinstance(artist, Artist) and artist.name or artist
                    params['album'] = album
                        
            self._api._post_data(params)
            self._albums = None
            
        @depaginate
        def get_artists(self, limit = None, page = None):
            params = self._default_params({'method': 'library.getArtists'})
            if limit is not None:
                params.update({'limit': limit})
            if page is not None:
                params.update({'page': page})

            try:
                data = self._api._fetch_data(params).find('artists')
                total_pages = int(data.attrib['totalPages'])
                yield total_pages
                
                for a in data.findall('artist'):
                    yield Artist(
                                 self._api,
                                 subject = self,
                                 name = a.findtext('name'),
                                 mbid = a.findtext('mbid'),
                                 stats = Stats(
                                               subject = a.findtext('name'),
                                               playcount = a.findtext('playcount') and int(a.findtext('playcount')) or None,
                                               tagcount = a.findtext('tagcount') and int(a.findtext('tagcount')) or None
                                               ),
                                 url = a.findtext('url'),
                                 streamable = (a.findtext('streamable') == "1"),
                                 image = dict([(i.get('size'), i.text) for i in a.findall('image')]),
                                 )
            except LastfmError:
                yield None

        @cached_property
        def artists(self):
            return self.get_artists()

        @authentication_required
        def add_artist(self, artist):
            params = {'method': 'library.addArtist'}
            if isinstance(artist, Artist):
                params['artist'] = artist.name
            else:
                params['artist'] = artist
            self._api._post_data(params)
            self._artists = None

        @depaginate
        def get_tracks(self, limit = None, page = None):
            params = self._default_params({'method': 'library.getTracks'})
            if limit is not None:
                params.update({'limit': limit})
            if page is not None:
                params.update({'page': page})
            
            try:
                data = self._api._fetch_data(params).find('tracks')
                total_pages = int(data.attrib['totalPages'])
                yield total_pages
                
                for t in data.findall('track'):
                    yield Track(
                                self._api,
                                subject = self,
                                name = t.findtext('name'),
                                artist = Artist(
                                                self._api,
                                                subject = self,
                                                name = t.findtext('artist/name'),
                                                mbid = t.findtext('artist/mbid'),
                                                url = t.findtext('artist/url'),
                                                ),
                                mbid = t.findtext('mbid'),
                                stats = Stats(
                                              subject = t.findtext('name'),
                                              playcount = t.findtext('playcount') and int(t.findtext('playcount')) or None,
                                              tagcount = t.findtext('tagcount') and int(t.findtext('tagcount')) or None
                                              ),
                                streamable = (t.findtext('streamable') == '1'),
                                full_track = (t.find('streamable').attrib['fulltrack'] == '1'),
                                image = dict([(i.get('size'), i.text) for i in t.findall('image')]),
                                )
            except LastfmError:
                yield None

        @cached_property
        def tracks(self):
            return self.get_tracks()

        @authentication_required
        def add_track(self, track, artist = None):
            params = {'method': 'library.addTrack'}
            if isinstance(track, Track):
                params['artist'] = track.artist.name
                params['track'] = track.name
            else:
                if artist is None:
                    track = self._api.search_track(track)[0]
                    params['artist'] = track.artist.name
                    params['track'] = track.name
                else:
                    params['artist'] = isinstance(artist, Artist) and artist.name or artist
                    params['track'] = track
            self._api._post_data(params)
            self._tracks = None

        def _default_params(self, extra_params = None):
            if not self.user.name:
                raise InvalidParametersError("user has to be provided.")
            params = {'user': self.user.name}
            if extra_params is not None:
                params.update(extra_params)
            return params

        @staticmethod
        def _hash_func(*args, **kwds):
            try:
                return hash(kwds['user'])
            except KeyError:
                raise InvalidParametersError("user has to be provided for hashing")

        def __hash__(self):
            return self.__class__._hash_func(user = self.user)

        def __repr__(self):
            return "<lastfm.User.Library: for user '%s'>" % self.user.name

from datetime import datetime
import time

from lastfm.api import Api
from lastfm.artist import Artist
from lastfm.album import Album
from lastfm.error import LastfmError, InvalidParametersError, AuthenticationFailedError
from lastfm.event import Event
from lastfm.geo import Country
from lastfm.stats import Stats
from lastfm.tag import Tag
from lastfm.tasteometer import Tasteometer
from lastfm.track import Track