# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
from __future__ import division
import os.path
from datetime import datetime, timedelta
import mimetypes
import random
from urlparse import urlparse
import time

import Image
from django.db.models import Count, Sum, Max
from django.template import RequestContext
from django.http import HttpResponse, HttpResponseForbidden, Http404
from django.shortcuts import get_object_or_404, redirect, render_to_response
from django.conf import settings

from ox.utils import json, ET

from ox.django.decorators import login_required_json
from ox.django.shortcuts import render_to_json_response, get_object_or_404_json, json_response
from ox.django.http import HttpFileResponse
from django.db.models import Q
import ox

import models
import utils
import tasks

from archive.models import File, Stream
from archive import extract
from clip.models import Clip 

from ox.django.api import actions

import utils


def _order_query(qs, sort, prefix='sort__'):
    order_by = []
    if len(sort) == 1:
        key = utils.get_by_id(settings.CONFIG['itemKeys'], sort[0]['key'])
        for s in key.get('additionalSort', settings.CONFIG.get('additionalSort', [])):
            sort.append(s)
    for e in sort:
        operator = e['operator']
        if operator != '-':
            operator = ''
        key = {
            'id': 'itemId',
        }.get(e['key'], e['key'])
        key = "%s%s" % (prefix, key)
        order = '%s%s' % (operator, key)
        order_by.append(order)
    if order_by:
        qs = qs.order_by(*order_by, nulls_last=True)
    return qs

def _order_by_group(query):
    if 'sort' in query:
        if len(query['sort']) == 1 and query['sort'][0]['key'] == 'items':
            order_by = query['sort'][0]['operator'] == '-' and '-items' or 'items'
            if query['group'] == "year":
                secondary = query['sort'][0]['operator'] == '-' and '-sortvalue' or 'sortvalue'
                order_by = (order_by, secondary)
            elif query['group'] != "keyword":
                order_by = (order_by, 'sortvalue')
            else:
                order_by = (order_by, 'value')
        else:
            order_by = query['sort'][0]['operator'] == '-' and '-sortvalue' or 'sortvalue'
            order_by = (order_by, 'items')
    else:
        order_by = ('-sortvalue', 'items')
    return order_by

def parse_query(data, user):
    query = {}
    query['range'] = [0, 100]
    query['sort'] = [{'key':'title', 'operator':'+'}]
    for key in ('sort', 'keys', 'group', 'range', 'position', 'positions'):
        if key in data:
            query[key] = data[key]
    query['qs'] = models.Item.objects.find(data, user)
    if 'clips' in data:
        conditions = {'query': data['clips']['query']}
        query['clip_qs'] = Clip.objects.find(conditions, user).order_by('start')
        query['clip_filter'] = models.Clip.objects.filter_annotations(conditions, user)
        query['clip_items'] = data['clips'].get('items', 5)
        query['clip_keys'] = data['clips'].get('keys')
        if not query['clip_keys']:
            query['clip_keys'] = ['id', 'in', 'out', 'annotations']

    #group by only allows sorting by name or number of itmes
    return query

def find(request):
    '''
        Example: 
            find({
                query:{
                    conditions:[{ key: '*', value: 'paris', operator: '='}],
                    operator:'&'
                },
                keys: ['title', 'id'],
                range: [0, 10],
                sort: [{key: 'title', operator: '+'}]
            })

        param data {
            'query': query,
            'sort': array,
            'range': array
            clipsQuery: ...
        }

            query: query object, more on query syntax at
                   https://wiki.0x2620.org/wiki/pandora/QuerySyntax
            sort: array of key, operator dics
                [
                    {
                        key: "year",
                        operator: "-"
                    },
                    {
                        key: "director",
                        operator: ""
                    }
                ]
            range:       result range, array [from, to]
            keys:  array of keys to return
            group:    group elements by, country, genre, director...

        with keys, items is list of dicts with requested properties:
          return {'status': {'code': int, 'text': string},
                'data': {items: array}}

Groups
        param data {
            'query': query,
            'key': string,
            'group': string,
            'range': array
            clips: {}
        }

            query: query object, more on query syntax at
                   https://wiki.0x2620.org/wiki/pandora/QuerySyntax
            range:       result range, array [from, to]
            keys:  array of keys to return
            group:    group elements by, country, genre, director...

        possible values for keys: name, items

        with keys
        items contains list of {'name': string, 'items': int}:
        return {'status': {'code': int, 'text': string},
            'data': {items: array}}

        without keys: return number of items in given query
          return {'status': {'code': int, 'text': string},
                'data': {items: int}}

Positions
        param data {
            'query': query,
            'positions': [],
            'sort': array
        }

            query: query object, more on query syntax at
                   https://wiki.0x2620.org/wiki/pandora/QuerySyntax
            positions: ids of items for which positions are required
        return {
            status: {...},
            data: {
                positions: {
                    id: position
                }
            }
        }
    '''
    data = json.loads(request.POST['data'])
    if settings.JSON_DEBUG:
        print json.dumps(data, indent=2)
    query = parse_query(data, request.user)

    response = json_response({})
    if 'group' in query:
        response['data']['items'] = []
        items = 'items'
        item_qs = query['qs']
        order_by = _order_by_group(query)
        qs = models.Facet.objects.filter(key=query['group']).filter(item__id__in=item_qs)
        qs = qs.values('value').annotate(items=Count('id')).order_by(*order_by)

        if 'positions' in query:
            response['data']['positions'] = {}
            ids = [j['value'] for j in qs]
            response['data']['positions'] = utils.get_positions(ids, query['positions'])
        elif 'range' in data:
            qs = qs[query['range'][0]:query['range'][1]]
            response['data']['items'] = [{'name': i['value'], 'items': i[items]} for i in qs]
        else:
            response['data']['items'] = qs.count()
    elif 'position' in query:
        qs = _order_query(query['qs'], query['sort'])
        ids = [j['itemId'] for j in qs.values('itemId')]
        data['conditions'] = data['conditions'] + {
            'value': query['position'],
            'key': query['sort'][0]['key'],
            'operator': '^'
        }
        query = parse_query(data, request.user)
        qs = _order_query(query['qs'], query['sort'])
        if qs.count() > 0:
            response['data']['position'] = utils.get_positions(ids, [qs[0].itemId])[0]
    elif 'positions' in query:
        qs = _order_query(query['qs'], query['sort'])
        ids = [j['itemId'] for j in qs.values('itemId')]
        response['data']['positions'] = utils.get_positions(ids, query['positions'])
    elif 'keys' in query:
        response['data']['items'] = []
        qs = _order_query(query['qs'], query['sort'])
        _p = query['keys']

        def get_clips(qs):
            n = qs.count()
            if n > query['clip_items']:
                num = query['clip_items']
                clips = []
                step = int(n / (num + 1))
                i = step
                while i <= (n - step) and i < n and len(clips) < num:
                    clips.append(qs[i])
                    i += step
            else:
                clips = qs
            return [c.json(query['clip_keys'], query['clip_filter']) for c in clips]

        def only_p_sums(m):
            r = {}
            for p in _p:
                if p  == 'accessed':
                    r[p] = m.sort.accessed or ''
                elif p == 'timesaccessed':
                    r[p] = m.sort.timesaccessed
                else:
                    r[p] = m.json.get(p, '')
            if 'clip_qs' in query:
                r['clips'] = get_clips(query['clip_qs'].filter(item=m))
            return r
        def only_p(m):
            r = {}
            if m:
                m = json.loads(m, object_hook=ox.django.fields.from_json)
                for p in _p:
                    r[p] = m.get(p, '')
            if 'clip_qs' in query:
                r['clips'] = get_clips(query['clip_qs'].filter(item__itemId=m['id']))
            return r
        qs = qs[query['range'][0]:query['range'][1]]
        #response['data']['items'] = [m.get_json(_p) for m in qs]
        if 'viewed' in _p or 'timesaccessed' in _p or 'accessed' in _p:
            qs = qs.select_related()
            response['data']['items'] = [only_p_sums(m) for m in qs]
        else:
            response['data']['items'] = [only_p(m['json']) for m in qs.values('json')]

    else: # otherwise stats
        items = query['qs']
        files = File.objects.filter(item__in=items).filter(size__gt=0)
        r = files.aggregate(
            Sum('duration'),
            Sum('pixels'),
            Sum('size')
        )
        totals = [i['id'] for i in settings.CONFIG['totals']]
        if 'duration' in totals:
            response['data']['duration'] = r['duration__sum']
        if 'files' in totals:
            response['data']['files'] = files.count()
        if 'items' in totals:
            response['data']['items'] = items.count()
        if 'pixels' in totals:
            response['data']['pixels'] = r['pixels__sum']
        if 'runtime' in totals:
            response['data']['runtime'] = items.aggregate(Sum('sort__runtime'))['sort__runtime__sum'] or 0
        if 'size' in totals:
            response['data']['size'] = r['size__sum']
        for key in ('runtime', 'duration', 'pixels', 'size'):
            if key in totals and response['data'][key] == None:
                response['data'][key] = 0 
    return render_to_json_response(response)
actions.register(find)


def autocomplete(request):
    '''
        param data
            key
            value
            operator '=', '==', '^', '$'
            query
            range
        return 

        query can be an item query to limit results
    '''
    data = json.loads(request.POST['data'])
    if not 'range' in data:
        data['range'] = [0, 10]
    op = data.get('operator', '=')

    key = settings.CONFIG['keys'][data['key']]
    order_by = key.get('autocompleteSortKey', False)
    if order_by:
        order_by = '-sort__%s' % order_by
    else:
        order_by = '-items'
    sort_type = key.get('sortType', key.get('type', 'string'))
    if sort_type == 'title':
        qs = parse_query({'query': data.get('query', {})}, request.user)['qs']
        if data['value']:
            if op == '=':
                qs = qs.filter(find__key=data['key'], find__value__icontains=data['value'])
            elif op == '==':
                qs = qs.filter(find__key=data['key'], find__value__iexact=data['value'])
            elif op == '^':
                qs = qs.filter(find__key=data['key'], find__value__istartswith=data['value'])
            elif op == '$':
                qs = qs.filter(find__key=data['key'], find__value__iendswith=data['value'])
        qs = qs.order_by(order_by, nulls_last=True)
        qs = qs[data['range'][0]:data['range'][1]]
        response = json_response({})
        response['data']['items'] = list(set([i.get(data['key']) for i in qs]))
    else:
        qs = models.Facet.objects.filter(key=data['key'])
        if data['value']:
            if op == '=':
                qs = qs.filter(value__icontains=data['value'])
            elif op == '==':
                qs = qs.filter(value__iexact=data['value'])
            elif op == '^':
                qs = qs.filter(value__istartswith=data['value'])
            elif op == '$':
                qs = qs.filter(value__iendswith=data['value'])
        if 'query' in data:
            item_query = parse_query({'query': data.get('query', {})}, request.user)['qs']
            qs = qs.filter(item__in=item_query)
        qs = qs.values('value').annotate(items=Count('id'))
        qs = qs.order_by(order_by)
        qs = qs[data['range'][0]:data['range'][1]]
        response = json_response({})
        response['data']['items'] = [i['value'] for i in qs]
    return render_to_json_response(response)
actions.register(autocomplete)

def findId(request):
    '''
        param data {
            'query': query,
            'sort': array,
            'range': array
        }

    '''
    data = json.loads(request.POST['data'])
    response = json_response({})
    response['data']['items'] = []
    '''
    FIXME: can not handle query for director []
    query = parse_query(data, request.user)
    qs = _order_query(query['qs'], query['sort'])
    if qs.count() == 1:
        response['data']['items'] = [i.get_json(data['keys']) for i in qs]
    elif settings.DATA_SERVICE:
    '''
    if settings.DATA_SERVICE:
        '''
        info = {}
        for c in data['query']['conditions']:
            info[c['key']] = c['value']
        r = models.external_data('getId', info)
        '''
        r = models.external_data('getId', data)
        if r['status']['code'] == 200:
            response['data']['items'] = [r['data']]
    return render_to_json_response(response)
actions.register(findId)

def get(request):
    '''
        param data {
            id: string
            keys: array
        }
        return item array
    '''
    response = json_response({})
    data = json.loads(request.POST['data'])
    data['keys'] = data.get('keys', [])
    item = get_object_or_404_json(models.Item, itemId=data['id'])
    if item.access(request.user):
        info = item.get_json(data['keys'])
        if not data['keys'] or 'stream' in data['keys']:
            info['stream'] = item.get_stream()
        if data['keys'] and 'layers' in data['keys']:
            info['layers'] = item.get_layers(request.user)
        if data['keys'] and 'files' in data['keys']:
            info['files'] = item.get_files(request.user)
        if not data['keys'] or 'notes' in data['keys'] \
           and request.user.get_profile().capability('canEditMetadata'):
            info['notes'] = item.notes
        if not data['keys'] or 'groups' in data['keys'] \
           and request.user.get_profile().capability('canEditMetadata'):
            info['groups'] = [g.name for g in item.groups.all()]

        info['editable'] = item.editable(request.user)
        response['data'] = info
    else:
        #response = json_response(status=403, text='permission denied')
        response = json_response(status=404, text='not found')
    return render_to_json_response(response)
actions.register(get)

@login_required_json
def edit(request):
    '''
        param data {
            id: string,
            key: value,..
        }
        return {
            status: {'code': int, 'text': string},
            data: {}
        }
    '''
    update_clips = False
    data = json.loads(request.POST['data'])
    item = get_object_or_404_json(models.Item, itemId=data['id'])
    if item.editable(request.user):
        item.log()
        response = json_response(status=200, text='ok')
        if 'notes' in data:
            if request.user.get_profile().capability('canEditMetadata'):
                item.notes = ox.sanitize_html(data['notes'])
            del data['notes']
        if 'rightslevel' in data:
            item.level = int(data['rightslevel'])
            del data['rightslevel']
        if 'user' in data:
            if request.user.get_profile().get_level() in ('admin', 'staff') and \
                models.User.objects.filter(username=data['user']).exists():
                new_user = models.User.objects.get(username=data['user'])
                if new_user != item.user:
                    item.user = new_user
                    update_clips = True
            del data['user']
        r = item.edit(data)
        if r:
            r.wait()
        if update_clips:
            tasks.update_clips.delay(item.itemId)
        response['data'] = item.get_json()
    else:
        response = json_response(status=403, text='permissino denied')
    return render_to_json_response(response)
actions.register(edit, cache=False)

@login_required_json
def remove(request):
    '''
        param data {
            id: string
        }

        return {'status': {'code': int, 'text': string}}
    '''
    response = json_response({})
    data = json.loads(request.POST['data'])
    item = get_object_or_404_json(models.Item, itemId=data['id'])
    if item.editable(request.user):
        item.log()
        #FIXME: is this cascading enough or do we end up with orphan files etc.
        item.delete()
        response = json_response(status=200, text='removed')
    else:
        response = json_response(status=403, text='permission denied')
    return render_to_json_response(response)
actions.register(remove, cache=False)

'''
    Poster API
'''


def setPosterFrame(request): #parse path and return info
    '''
        param data {
            id: itemId,
            position: float
        }
        return {
            status: {'code': int, 'text': string},
            data: {
            }
        }
    '''
    data = json.loads(request.POST['data'])
    item = get_object_or_404_json(models.Item, itemId=data['id'])
    if item.editable(request.user):
        item.poster_frame = data['position']
        item.save()
        tasks.update_poster(item.itemId)
        response = json_response()
    else:
        response = json_response(status=403, text='permissino denied')
    return render_to_json_response(response)
actions.register(setPosterFrame, cache=False)

def setPoster(request): #parse path and return info
    '''
        param data {
            id: itemId,
            source: string
        }
        return {
            status: {'code': int, 'text': string},
            data: {
                poster: {url,width,height}
            }
        }
    '''
    data = json.loads(request.POST['data'])
    item = get_object_or_404_json(models.Item, itemId=data['id'])
    response = json_response()
    if item.editable(request.user):
        valid_sources = [p['source'] for p in item.get_posters()]
        if data['source'] in valid_sources:
            item.poster_source = data['source']
            if item.poster:
                item.poster.delete()
            item.save()
            tasks.update_poster(item.itemId)
            response = json_response()
            response['data']['posterAspect'] = item.poster_width/item.poster_height
        else:
            response = json_response(status=403, text='invalid poster url')
    else:
        response = json_response(status=403, text='permission denied')
    return render_to_json_response(response)
actions.register(setPoster, cache=False)

def updateExternalData(request):
    '''
        param data {
            id: itemId,
        }
        return {
            status: {'code': int, 'text': string},
            data: {
                poster: {url,width,height}
            }
        }
    '''
    data = json.loads(request.POST['data'])
    item = get_object_or_404_json(models.Item, itemId=data['id'])
    response = json_response()
    if item.editable(request.user):
        item.update_external()
    else:
        response = json_response(status=403, text='permission denied')
    return render_to_json_response(response)
actions.register(updateExternalData, cache=False)

def lookup(request):
    '''
        param data {
            title: string,
            director: [string],
            year: string,
            id: string
        }
        return {
            status: {'code': int, 'text': string},
            data: {
                title: string,
                director: [string],
                year: string,
                id: string
            }
        }
    '''
    data = json.loads(request.POST['data'])
    if 'id' in data:
        i = models.Item.objects.get(itemId=data['id'])
        r = {'id': i.itemId}
        for key in ('title', 'director', 'year'):
            r[key] = i.get(key)
        response = json_response(r)
    else:
        response = json_response(status=404, text='not found')
    return render_to_json_response(response)
actions.register(lookup)

def getImdbId(request):
    '''
        param data {
            title: string,
            director: string,
            year: string
        }
        return {
            status: {'code': int, 'text': string},
            data: {
                imdbId:string
            }
        }
    '''
    data = json.loads(request.POST['data'])
    imdbId = ox.web.imdb.getImdbId(data['title'], data['director'], timeout=-1)
    if imdbId:
        response = json_response({'imdbId': imdbId})
    else:
        response = json_response(status=404, text='not found')
    return render_to_json_response(response)
actions.register(getImdbId)

'''
    media delivery
'''
def frame(request, id, size, position=None):
    item = get_object_or_404(models.Item, itemId=id)
    if not item.access(request.user):
        return HttpResponseForbidden()
    frame = None
    if not position:
        frames = item.poster_frames()
        if frames:
            position = item.poster_frame
            if position == -1 or position > len(frames):
                position = int(len(frames)/2)
            position = frames[int(position)]['position']
        elif item.poster_frame == -1 and item.sort.duration:
            position = item.sort.duration/2
        else:
            position = item.poster_frame
    else:
        position = float(position.replace(',', '.'))

    if not frame:
        frame = item.frame(position, int(size))

    if not frame:
        frame = os.path.join(settings.STATIC_ROOT, 'jpg/list256.jpg')
        #raise Http404
    return HttpFileResponse(frame, content_type='image/jpeg')

def poster_frame(request, id, position):
    item = get_object_or_404(models.Item, itemId=id)
    if not item.access(request.user):
        return HttpResponseForbidden()
    position = int(position)
    frames = item.poster_frames()
    if frames and len(frames) > position:
        frame = frames[position]['path']
        return HttpFileResponse(frame, content_type='image/jpeg')
    raise Http404


def image_to_response(image, size=None):
    if size:
        size = int(size)
        path = image.path.replace('.jpg', '.%d.jpg'%size)
        if not os.path.exists(path):
            image_size = max(image.width, image.height)
            if size > image_size:
                path = image.path
            else:
                extract.resize_image(image.path, path, size=size)
    else:
        path = image.path
    return HttpFileResponse(path, content_type='image/jpeg')

def siteposter(request, id, size=None):
    item = get_object_or_404(models.Item, itemId=id)
    if not item.access(request.user):
        return HttpResponseForbidden()
    poster = item.path('siteposter.jpg')
    poster = os.path.abspath(os.path.join(settings.MEDIA_ROOT, poster))
    if size:
        size = int(size)
        image = Image.open(poster)
        image_size = max(image.size)
        if size < image_size:
            path = poster.replace('.jpg', '.%d.jpg'%size)
            extract.resize_image(poster, path, size=size)
            poster = path
    return HttpFileResponse(poster, content_type='image/jpeg')

def poster(request, id, size=None):
    item = get_object_or_404(models.Item, itemId=id)
    if not item.access(request.user):
        return HttpResponseForbidden()
    if item.poster:
        return image_to_response(item.poster, size)
    else:
        poster_path = os.path.join(settings.STATIC_ROOT, 'jpg/poster.jpg')
        response = HttpFileResponse(poster_path, content_type='image/jpeg')
        response['Cache-Control'] = 'no-cache'
        return response

def icon(request, id, size=None):
    item = get_object_or_404(models.Item, itemId=id)
    if not item.access(request.user):
        return HttpResponseForbidden()
    if item.icon:
        return image_to_response(item.icon, size)
    else:
        poster_path = os.path.join(settings.STATIC_ROOT, 'jpg/poster.jpg')
        response = HttpFileResponse(poster_path, content_type='image/jpeg')
        response['Cache-Control'] = 'no-cache'
        return response

def timeline(request, id, size, position=-1, format='jpg', mode=None):
    item = get_object_or_404(models.Item, itemId=id)
    if not item.access(request.user):
        return HttpResponseForbidden()

    if not mode:
        mode = 'antialias'
    modes = [t['id'] for t in settings.CONFIG['timelines']]
    if mode not in modes:
        raise Http404
    modes.pop(modes.index(mode))

    prefix = os.path.join(item.timeline_prefix, 'timeline')
    def timeline():
        timeline = '%s%s%sp' % (prefix, mode, size) 
        if position > -1:
            timeline += '%d' % int(position)
        return timeline + '.jpg'

    path = timeline()
    while modes and not os.path.exists(path):
        mode = modes.pop(0)
        path = timeline()
    return HttpFileResponse(path, content_type='image/jpeg')

def torrent(request, id, filename=None):
    item = get_object_or_404(models.Item, itemId=id)
    if not item.access(request.user):
        return HttpResponseForbidden()
    if not item.torrent:
        raise Http404
    if not filename or filename.endswith('.torrent'):
        response = HttpResponse(item.get_torrent(request),
                                content_type='application/x-bittorrent')
        filename = utils.safe_filename("%s.torrent" % item.get('title'))
        response['Content-Disposition'] = 'attachment; filename="%s"' % filename.encode('utf-8')
        return response
    while filename.startswith('/'):
        filename = filename[1:]
    filename = filename.replace('/../', '/')
    filename = item.path('torrent/%s' % filename)
    filename = os.path.abspath(os.path.join(settings.MEDIA_ROOT, filename))
    response = HttpFileResponse(filename)
    response['Content-Disposition'] = 'attachment; filename="%s"' % \
                                      os.path.basename(filename.encode('utf-8'))
    return response

def video(request, id, resolution, format, index=None):
    item = get_object_or_404(models.Item, itemId=id)
    if not item.access(request.user):
        return HttpResponseForbidden()
    if index:
        index = int(index) - 1
    else:
        index = 0
    #streams = Stream.object.filter(file__item__itemId=item.itemId,
    #                               file__selected=True, file__part=index,
    #                               resolution=resolution, format=format)
    #if streams.count() != 1:
    # reise Http404
    streams = Stream.objects.filter(file__item__itemId=item.itemId,
                                    resolution=resolution, format=format).order_by('file__part')
    if index + 1 > streams.count():
        raise Http404
    stream = streams[index]
    if not stream.available or not stream.video:
        raise Http404
    path = stream.video.path

    #server side cutting
    #FIXME: this needs to join segments if needed
    t = request.GET.get('t')
    if t:
        def parse_timestamp(s):
            if ':' in s:
                s = ox.time2ms(s) / 1000
            return float(s)
        t = map(parse_timestamp, t.split(','))
        ext = '.%s' % format
        content_type = mimetypes.guess_type(path)[0]
        if len(t) == 2 and t[1] > t[0] and stream.info['duration']>=t[1]:
            response = HttpResponse(extract.chop(path, t[0], t[1]), content_type=content_type)
            filename = u"Clip of %s - %s-%s - %s %s%s" % (
                item.get('title'),
                ox.format_duration(t[0] * 1000).replace(':', '.')[:-4],
                ox.format_duration(t[1] * 1000).replace(':', '.')[:-4],
                settings.SITENAME,
                item.itemId,
                ext
            )
            filename = filename.encode('utf8')
            response['Content-Disposition'] = 'attachment; filename="%s"' % filename
            return response
        else:
            filename = "%s - %s %s%s" % (
                item.get('title'),
                settings.SITENAME,
                item.itemId,
                ext
            )
            response = HttpFileResponse(path, content_type=content_type)
            filename = filename.encode('utf8')
            response['Content-Disposition'] = 'attachment; filename="%s"' % filename
            return response
    if not settings.XSENDFILE and not settings.XACCELREDIRECT:
        return redirect(stream.video.url)
    response = HttpFileResponse(path)
    response['Cache-Control'] = 'public'
    return response

def srt(request, id, layer, index=None):
    item = get_object_or_404(models.Item, itemId=id)
    if not item.access(request.user):
        response = HttpResponseForbidden()
    else:
        response = HttpResponse()
        filename = "%s.srt" % item.get('title')
        response['Content-Disposition'] = 'attachment; filename="%s"' % filename
        response['Content-Type'] = 'text/x-srt'
        response.write(item.srt(layer))
    return response

def random_annotation(request):
    n = models.Item.objects.all().count()
    pos = random.randint(0, n)
    item = models.Item.objects.all()[pos]
    n = item.annotations.all().count()
    pos = random.randint(0, n)
    clip = item.annotations.all()[pos]
    return redirect('/%s'% clip.public_id)

def atom_xml(request):
    add_updated = True
    feed = ET.Element("feed")
    feed.attrib['xmlns'] = 'http://www.w3.org/2005/Atom'
    feed.attrib['xmlns:media'] = 'http://search.yahoo.com/mrss/'
    feed.attrib['xml:lang'] = 'en'
    title = ET.SubElement(feed, "title")
    title.text = settings.SITENAME
    title.attrib['type'] = 'text'
    link = ET.SubElement(feed, "link")
    link.attrib['rel'] = 'self'
    link.attrib['type'] = 'application/atom+xml'
    atom_link = request.build_absolute_uri('/atom.xml')
    link.attrib['href'] = atom_link
    '''
    rights = ET.SubElement(feed, 'rights')
    rights.attrib['type'] = 'text'
    rights.text = "PGL"
    '''
    el = ET.SubElement(feed, 'id')
    el.text = atom_link

    level = settings.CONFIG['capabilities']['canSeeItem']['guest']
    if not request.user.is_anonymous():
        level = request.user.get_profile().level
    for item in models.Item.objects.filter(level__lte=level, rendered=True).order_by('-created')[:7]:
        if add_updated:
            updated = ET.SubElement(feed, "updated")
            updated.text = item.modified.strftime("%Y-%m-%dT%H:%M:%SZ")
            add_updated = False

        page_link = request.build_absolute_uri('/%s' % item.itemId)

        entry = ET.Element("entry")
        title = ET.SubElement(entry, "title")
        title.text = item.get('title')
        link = ET.SubElement(entry, "link")
        link.attrib['rel'] = 'alternate'
        link.attrib['href'] = "%s/info" % page_link
        updated = ET.SubElement(entry, "updated")
        updated.text = item.modified.strftime("%Y-%m-%dT%H:%M:%SZ")
        published = ET.SubElement(entry, "published")
        published.text = item.created.strftime("%Y-%m-%dT%H:%M:%SZ")
        el = ET.SubElement(entry, "id")
        el.text = page_link

        if item.get('director'):
            el = ET.SubElement(entry, "author")
            name = ET.SubElement(el, "name")
            name.text = u', '.join(item.get('director'))
        elif item.user:
            el = ET.SubElement(entry, "author")
            name = ET.SubElement(el, "name")
            name.text = item.user.username

        for topic in item.get('topics', []):
          el = ET.SubElement(entry, "category")
          el.attrib['term'] = topic

        '''
        el = ET.SubElement(entry, "rights")
        el.text = "PGL"
        el = ET.SubElement(entry, "link")
        el.attrib['rel'] = "license"
        el.attrib['type'] = "text/html"
        el.attrib['href'] = item.licenseUrl
        '''
        '''
        el = ET.SubElement(entry, "contributor")
        name = ET.SubElement(el, "name")
        name.text = item.user.username
        '''

        description = item.get('description', item.get('summary'))
        if description:
            content = ET.SubElement(entry, "content")
            content.attrib['type'] = 'html'
            content.text = description

        format = ET.SubElement(entry, "format")
        format.attrib['xmlns'] = 'http://transmission.cc/FileFormat'
        stream = item.streams().filter(source=None).order_by('-id')[0]
        for key in ('size', 'duration', 'video_codec',
                    'framerate', 'width', 'height',
                    'audio_codec', 'samplerate', 'channels'):
            value = stream.info.get(key)
            if not value and stream.info.get('video'):
                value = stream.info['video'][0].get({
                    'video_codec': 'codec'
                }.get(key, key))
            if not value and stream.info.get('audio'):
                value = stream.info['audio'][0].get({
                    'audio_codec': 'codec'
                }.get(key, key))
            if value and value !=  -1:
                el = ET.SubElement(format, key)
                el.text = unicode(value)
        el = ET.SubElement(format, 'pixel_aspect_ratio')
        el.text = u"1:1"

        if settings.CONFIG['video'].get('download'):
            if item.torrent:
                el = ET.SubElement(entry, "link")
                el.attrib['rel'] = 'enclosure'
                el.attrib['type'] = 'application/x-bittorrent'
                el.attrib['href'] = '%s/torrent/' % page_link
                el.attrib['length'] = '%s' % ox.get_torrent_size(item.torrent.path)
            #FIXME: loop over streams
            #for s in item.streams().filter(resolution=max(settings.CONFIG['video']['resolutions'])):
            for s in item.streams().filter(source=None):
                el = ET.SubElement(entry, "link")
                el.attrib['rel'] = 'enclosure'
                el.attrib['type'] = 'video/%s' % s.format
                el.attrib['href'] = '%s/%sp.%s' % (page_link, s.resolution, s.format)
                el.attrib['length'] = '%s'%s.video.size

        el = ET.SubElement(entry, "media:thumbnail")
        thumbheight = 96
        thumbwidth = int(thumbheight * item.stream_aspect)
        thumbwidth -= thumbwidth % 2
        el.attrib['url'] = '%s/%sp.jpg' % (page_link, thumbheight)
        el.attrib['width'] = str(thumbwidth)
        el.attrib['height'] = str(thumbheight)
        feed.append(entry)     
    return HttpResponse(
        '<?xml version="1.0" encoding="utf-8" ?>\n' + ET.tostring(feed),
        'application/atom+xml'
    )

def oembed(request):
    format = request.GET.get('format', 'json')
    maxwidth = request.GET.get('maxwidth', 640)
    maxheight = request.GET.get('maxheight', 480)

    url = request.GET['url']
    parts = urlparse(url).path.split('/')
    itemId = parts[1]
    #fixme: embed should reflect actuall url
    item = get_object_or_404_json(models.Item, itemId=itemId)
    embed_url = request.build_absolute_uri('/%s/embed' % item.itemId)
    oembed = {}
    oembed['version'] = '1.0'
    oembed['type'] = 'video'
    oembed['provider_name'] = settings.SITENAME
    oembed['provider_url'] = request.build_absolute_uri('/')
    oembed['title'] = item.get('title')
    #oembed['author_name'] = item.get('director')
    #oembed['author_url'] = ??
    height = 96
    width = 128
    if maxheight > height or height > maxheight:
        height = maxheight
    if maxwidth > width or width > maxwidth:
        width = maxwidth
    oembed['html'] = '<iframe width="%s" height="%s" src="%s" frameborder="0" allowfullscreen></iframe>' % (width, height, embed_url)
    oembed['width'] = width
    oembed['height'] = height
    thumbheight = 96
    thumbwidth = int(thumbheight * item.stream_aspect)
    thumbwidth -= thumbwidth % 2
    oembed['thumbnail_height'] = thumbheight
    oembed['thumbnail_width'] = thumbwidth
    oembed['thumbnail_url'] = request.build_absolute_uri('/%s/%sp.jpg' % (item.itemId, thumbheight))
    if format == 'xml':
        oxml = ET.Element('oembed')
        for key in oembed:
            e = ET.SubElement(oxml, key)
            e.text = unicode(oembed[key])
        return HttpResponse(
            '<?xml version="1.0" encoding="utf-8" standalone="yes"?>\n' + ET.tostring(oxml),
            'application/xml'
        )
    return HttpResponse(json.dumps(oembed, indent=2), 'application/json')

def sitemap_xml(request):
    sitemap = os.path.abspath(os.path.join(settings.MEDIA_ROOT, 'sitemap.xml'))
    if not os.path.exists(sitemap):
        tasks.update_sitemap(request.build_absolute_uri('/'))
    elif time.mktime(time.localtime()) - os.stat(sitemap).st_ctime > 24*60*60:
        tasks.update_sitemap.delay(request.build_absolute_uri('/'))
    response = HttpFileResponse(sitemap)
    response['Content-Type'] = 'application/xml'
    return response

def item_json(request, id):
    level = settings.CONFIG['capabilities']['canSeeItem']['guest']
    if not request.user.is_anonymous():
        level = request.user.get_profile().level
    qs = models.Item.objects.filter(itemId=id, level__lte=level)
    if qs.count() == 0:
        response = json_response(status=404, text='not found')
    else:
        item = qs[0]
        response = item.get_json()
        response['layers'] = item.get_layers(request.user)
    return render_to_json_response(response)

def item_xml(request, id):
    level = settings.CONFIG['capabilities']['canSeeItem']['guest']
    if not request.user.is_anonymous():
        level = request.user.get_profile().level
    qs = models.Item.objects.filter(itemId=id, level__lte=level)
    if qs.count() == 0:
        response = json_response(status=404, text='not found')
        response = render_to_json_response(response)
    else:
        item = qs[0]
        j = item.get_json()
        j['layers'] = item.get_layers(request.user)
        if 'resolution' in j:
            j['resolution'] = {'width': j['resolution'][0], 'height':j['resolution'][1]}
        def xmltree(root, key, data):
            if isinstance(data, list) or \
                isinstance(data, tuple):
                e = ET.SubElement(root, key)
                for value in data:
                    xmltree(e, key, value)
            elif isinstance(data, dict):
                for k in data:
                    if data[k]:
                        xmltree(root, k, data[k])
            else:
                e = ET.SubElement(root, key)
                e.text = unicode(data)

        oxml = ET.Element('item')
        xmltree(oxml, 'item', j)
        response = HttpResponse(
            '<?xml version="1.0" encoding="utf-8" standalone="yes"?>\n' + ET.tostring(oxml),
            'application/xml'
        )
    return response

def item(request, id):
    id = id.split('/')[0]
    template = 'index.html'
    level = settings.CONFIG['capabilities']['canSeeItem']['guest']
    if not request.user.is_anonymous():
        level = request.user.get_profile().level
    qs = models.Item.objects.filter(itemId=id, level__lte=level)
    if qs.count() == 0:
        context = RequestContext(request, {
            'base_url': request.build_absolute_uri('/'),
            'settings': settings
        })
    else:
        item = qs[0]
        template = 'item.html'
        keys = [
            'year',
            'director',
            'topic',
            'summary'
        ]
        data = []
        for key in keys:
            value = item.get(key)
            if value:
                if isinstance(value, list):
                    value = value = u', '.join([unicode(v) for v in value])
                data.append({'key': key.capitalize(), 'value': value})
        clips = []
        clip = {'in': 0, 'annotations': []}
        #logged in users should have javascript. not adding annotations makes load faster
        if request.user.is_anonymous():
            for a in item.annotations.filter(
                layer__in=models.Annotation.public_layers()).order_by('start', 'end', 'sortvalue'):
                if clip['in'] < a.start:
                    if clip['annotations']:
                        clip['annotations'] = '<br />\n'.join(clip['annotations'])
                        clips.append(clip)
                    clip = {'in': a.start, 'annotations': []}
                clip['annotations'].append(a.value)
        ctx = {
            'current_url': request.build_absolute_uri(request.get_full_path()),
            'base_url': request.build_absolute_uri('/'),
            'url': request.build_absolute_uri('/%s' % id),
            'id': id,
            'settings': settings,
            'data': data,
            'clips': clips,
            'icon': settings.CONFIG['user']['ui']['icons'] == 'frames' and 'icon' or 'poster',

        }
        for key in ('title', 'description', 'keywords'):
            value = item.get({
                'description': 'summary',
                'keywords': 'topic' in keys and 'topic' or 'keywords'
            }.get(key, key))
            if isinstance(value, list):
                value = value = ', '.join(value)
            if value:
                ctx[key] = ox.strip_tags(value)

        context = RequestContext(request, ctx)
    return render_to_response(template, context)