# -*- coding: utf-8 -*-
import simplejson as json

from django.shortcuts import render, get_object_or_404, redirect
from django.http import HttpResponseBadRequest, HttpResponse
from django.core import serializers
from django.db.models import get_model
from django.views.decorators.csrf import csrf_protect

from ..models import Invoice


def get_pair(request, model, param1, val1, param2):
    if not request.is_ajax():
        return HttpResponseBadRequest()

    kwargs = {param1: val1}

    try:
        q_model = get_model('docs', model)
        val2 = getattr(q_model.objects.get(**kwargs), param2)
    except:
        val2 = None
    data = {
        'val': val2,
    }
    return HttpResponse(json.dumps(data), mimetype='application/json')


def get_invoices(request, client_id=None):
    if not request.is_ajax():
        return HttpResponseBadRequest()
    if client_id:
        invoices = Invoice.objects.filter(client__id=client_id)
    else:
        invoices = Invoice.objects.filter(user=request.user)
    invoices = {invoice.id: '№ %s от %s' % (invoice.doc_num, invoice.doc_date) for invoice in invoices}

    return HttpResponse(json.dumps(invoices), mimetype='application/json')


def get_tbl_items(request, invoice_id):
    if not request.is_ajax():
        return HttpResponseBadRequest()

    invoice = Invoice.objects.get(pk=invoice_id)
    data = serializers.serialize('json', invoice.invoice_items.all())

    return HttpResponse(json.dumps(data), mimetype='application/json')


def get_client_by_invoice(request, invoice_id):
    if not request.is_ajax():
        return HttpResponseBadRequest()

    invoice = Invoice.objects.get(pk=invoice_id)

    return HttpResponse(json.dumps([invoice.client.id,]), mimetype='application/json')