# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import logging
import os.path
from itertools import chain
from operator import attrgetter
from os.path import basename
from wsgiref.util import FileWrapper

from future.builtins import (int, map, open)
from django.contrib.auth.decorators import login_required
try:
    from django.contrib.sites.models import get_current_site
except ImportError:
    from django.contrib.sites.shortcuts import get_current_site
from django.core.exceptions import MultipleObjectsReturned
from django.http import HttpResponse, HttpResponseForbidden, Http404
from django.shortcuts import render
from django.utils import translation

import django_mobile_app_distribution.settings as app_dist_settings
from django_mobile_app_distribution.models import IosApp, AndroidApp, UserInfo

log = logging.getLogger(__name__)


@login_required
def index(request):
    try:
        # Activate client's language preference
        lang = request.user.userinfo.language
        translation.activate(lang)
    except UserInfo.DoesNotExist:
        pass

    ios_user_apps = IosApp.objects.filter(user_id__exact=request.user.id)
    android_user_apps = AndroidApp.objects.filter(user_id__exact=request.user.id)
    apps = list(chain(ios_user_apps, android_user_apps))

    ios_group_apps = IosApp.objects.filter(groups__in=request.user.groups.all())
    android_group_apps = AndroidApp.objects.filter(groups__in=request.user.groups.all())
    group_apps = list(chain(ios_group_apps, android_group_apps))
    for group_app in group_apps:
        if group_app not in apps:
            apps.append(group_app)

    apps.sort(key=attrgetter('updatedAt'), reverse=True)
    apps.sort(key=attrgetter('version'), reverse=True)
    apps.sort(key=attrgetter('operating_system'), reverse=True) # let iOS come first
    apps.sort(key=attrgetter('name'))

    return render(request, 'django_mobile_app_distribution/app_list.html', {
        'apps': apps,
        'ios_identifier': app_dist_settings.IOS,
        'site_url': get_current_site(request).domain
    })


@login_required
def send_apk(request, app_id):
    """
    Send a file through Django without loading the whole file into
    memory at once. The FileWrapper will turn the file object into an
    iterator for chunks of 8KB.
    """
    android_app = None
    try:
        android_app = AndroidApp.objects.get(pk=app_id)
    except (AndroidApp.DoesNotExist, MultipleObjectsReturned):
        return HttpResponse('App does not exist', status=404)

    authenticated = False
    if android_app.user:
        if android_app.user.id == request.user.id:
            authenticated = True

    if not authenticated:
        app_group_ids = android_app.groups.all().values_list('pk', flat=True)
        app_group_ids = list(map(int, app_group_ids))
        for user_group in request.user.groups.all():
            user_group_id = int(user_group.id)
            if user_group_id in app_group_ids:
                authenticated = True
                break

    if not authenticated:
        return HttpResponseForbidden('This is not your app')

    filename = os.path.join(
        app_dist_settings.MOBILE_APP_DISTRIBUTION_ANDROID_FILE_STORAGE_PATH,
        android_app.app_binary.name
    )
    response = HttpResponse(FileWrapper(open(filename, 'rb')))
    response['Content-Length'] = os.path.getsize(filename)
    response['Content-Type'] = app_dist_settings.MOBILE_APP_DISTRIBUTION_CONTENT_TYPES[android_app.operating_system]
    response['Content-Disposition'] = 'inline; filename=%s' % basename(filename)
    return response


def ios_app_plist(request, app_id):

    ios_app = None
    try:
        ios_app = IosApp.objects.get(pk=app_id)
    except (IosApp.DoesNotExist, MultipleObjectsReturned):
        raise Http404

    from . import settings as mad_settings
    plist = ''
    if ios_app.display_image and ios_app.full_size_image:
        plist = mad_settings.IOS_PLIST_BLUEPRINT_IOS9
        plist = plist.replace(mad_settings.PLIST_DISPLAY_IMAGE, ios_app.get_display_image_url())
        plist = plist.replace(mad_settings.PLIST_FULL_SIZE_IMAGE, ios_app.get_full_size_image_url())
    else:
        plist = mad_settings.IOS_PLIST_BLUEPRINT

    plist = plist.replace(mad_settings.PLIST_APP_URL, ios_app.get_binary_url())
    plist = plist.replace(mad_settings.PLIST_BUNDLE_IDENTIFIER, ios_app.bundle_identifier)
    plist = plist.replace(mad_settings.PLIST_BUNDLE_VERSION, ios_app.version)
    plist = plist.replace(mad_settings.PLIST_APP_TITLE, ios_app.name)

    return HttpResponse(
        plist,
        content_type=mad_settings.MOBILE_APP_DISTRIBUTION_CONTENT_TYPES[mad_settings.IOS_PLIST]
    )