# -*- coding: utf-8 -*-

from django.core.files.storage import default_storage
from django.http import JsonResponse

from rest_framework import viewsets

from account.models import LensmanInfo
from photo.models import PhotosInfo
from photo.serializers import PhotosInfoSerializer

import os


# [How to do a PUT request with curl?](http://stackoverflow.com/questions/13782198/how-to-do-a-put-request-with-curl)
# Unfortunately, the -T is no substitute for -X PUT if you want to specify parameters with -d or -F.
# -T sends the content of a file via PUT. To achieve the GET after a redirect, add the parameter --location
#
# -F, --form <name=content>
#               (HTTP)  This  lets  curl emulate a filled-in form in which a user has pressed the submit button. This causes curl to POST data
#               using the Content-Type multipart/form-data according to RFC 2388. This enables uploading of binary files  etc.  To  force  the
#               'content'  part  to  be a file, prefix the file name with an @ sign. To just get the content part from a file, prefix the file
#               name with the symbol <. The difference between @ and < is then that @ makes a file get attached in the post as a file  upload,
#               while the < makes a text field and just get the contents for that text field from a file.
#
# curl -X POST -F lensman_id=123 -F session_id=456 -F photo_id=789 -F photo=@7056288a9ddf2db294cf50a943920989.jpg;filename=789 http://xfoto.com.cn/api/photos/upload
def upload_photo(request):
    lensman_id = request.POST.get('lensman_id', '')
    session_id = request.POST.get('session_id', '')
    photo_id = request.POST.get('photo_id', '')

    photo = request.FILES.get('photo', '')

    if not (lensman_id and session_id and photo_id and photo):
        return JsonResponse({
            'status': 400,
            'message': u'参数错误',
        })

    try:
        LensmanInfo.objects.get(lensman_id=lensman_id)
    except LensmanInfo.DoesNotExist:
        return JsonResponse({
            'status': 400,
            'message': u'参数错误',
        })

    _, extension = os.path.splitext(photo.name)
    photo_path = 'photo/{0}/{1}/{2}{3}'.format(lensman_id, session_id, photo_id, extension)

    if default_storage.exists(photo_path):
        default_storage.delete(photo_path)
    default_storage.save(photo_path, photo)

    photo, created = PhotosInfo.objects.get_or_create(
        lensman_id=lensman_id,
        session_id=session_id,
        photo_id=photo_id,
        photo_path=photo_path
    )

    return JsonResponse({
        'status': 200,
        'message': u'照片上传成功',
        'data': photo.data,
    })


class PhotoInfoViewSet(viewsets.ModelViewSet):
    queryset = PhotosInfo.objects.all().order_by('-created_at')
    serializer_class = PhotosInfoSerializer