import json

from django.http import HttpResponse
from django.utils.encoding import is_protected_type
from django.db.models.fields.files import File

from pdfformfiller import models

def json_response(data):
    response = HttpResponse(json.dumps(data))
    response['Content-Type'] = 'application/json'
    return response


def extract_fields(model):
    result = {}
    for field in model._meta.fields:
        value = result[field.name] = field._get_val_from_obj(model)
        if isinstance(value, File):
            value = value.url

        result[field.name] = value
    return result


"""
def pages(request, page_id=None):
    context = {}
    pages = []

    if doc_id:
        pages = models.Page.objects.get(pk = page_id)
    elif request.GET('document', None):
        doc_id = request.GET('document')
        pages = models.Page.objects.filter(document__pk = doc_id)
    else:
        pages = []

    for page in pages:
        pages.append(extract_fields(page)) #, ['id', 'document', ))

    context['pages'] = pages

    return json_response(context)


def fields(request, page_id=None):

    page = models.Page.objects.get(document__pk = pdf,
                                   page_num = page_num)

    fields = page.formfield_set.all()

    context = {}
    #context['page'] = extract_fields(page)
    context['page']['fields'] = map(extract_fields, fields)

    return json_response(context)

"""

def document(request):
    documents = models.Document.objects.all().values('id','name')
    return json_response(list(documents))


def document_detail(request, id):
    document = models.Document.objects.get(pk=id)
    context = extract_fields(document)
    return json_response(context)


def page(request):
    pages = models.Page.objects.all()
    context = [extract_fields(p) for p in pages]
    return json_response(context)


def page_detail(request, id):
    page = models.Page.objects.get(pk=id)
    context = extract_fields(page)
    return json_response(context)


def document_pages(request, id):
    pages = models.Page.objects.filter(document__pk=id)
    context = [extract_fields(page) for page in pages]
    return json_response(context)

def field(request):
    fields = models.FormField.objects.all()
    context = [extract_fields(f) for f in fields]
    return json_response(context)

def field_detail(request, id):
    field = models.FormField.objects.get(pk=id)
    context = extract_fields(field)
    return json_response(context)

def page_fields(request, id):
    fields = models.FormField.objects.filter(page__pk=id)
    context = [extract_fields(f) for f in fields]
    return json_response(context)