import json

from django.conf import settings; logging = settings.LOG
from django.utils.translation import gettext as _
from django.views.decorators.csrf import csrf_exempt
from django.shortcuts import redirect

from .base import get_default_language, set_default_language, set_request_language
from fle_utils.internet.classes import JsonResponse, JsonResponseMessageError
from fle_utils.internet.decorators import api_handle_error_with_json

# this file goes in /usr/[local/]lib/python2.7/dist-packages/kalite/i18n/api_views.py
# and allows you to switch languages on the fly with a link:
#     http://rachelfriends.org:8008/api/i18n/set_default_language/?lang=en&returnUrl=http://rachelfriends.org:8008/

@csrf_exempt
@api_handle_error_with_json
def set_server_or_user_default_language(request):

    returnUrl = ''
    allUsers = ''

    if request.method == 'GET':
        data = request.GET
        if 'returnUrl' in data:
            returnUrl = data['returnUrl']
        if 'allUsers' in data:
            allUsers = data['allUsers']
    elif request.method == 'POST':
        data = json.loads(request.raw_post_data) # POST is getting interpreted wrong again by Django

    lang_code = data['lang']

    if allUsers or (request.is_django_user and lang_code != get_default_language()):
        logging.debug("setting server default language to %s" % lang_code)
        set_default_language(lang_code)
    elif not request.is_django_user and request.is_logged_in and lang_code != request.session["facility_user"].default_language:
        logging.debug("setting user default language to %s" % lang_code)
        request.session["facility_user"].default_language = lang_code
        request.session["facility_user"].save()

    if lang_code != request.session.get("default_language"):
        logging.debug("setting session language to %s" % lang_code)
        request.session["default_language"] = lang_code

    set_request_language(request, lang_code)

    if returnUrl == '':
        return JsonResponse({"status": "OK"})
    else:
        return redirect(returnUrl)