from django.shortcuts import render
from django.http import HttpResponse, HttpResponseRedirect, JsonResponse
from django.template import loader

from .models import Sale, Product
from .forms import ImportProductsForm

import csv
import io

def index(request):
    return render(request, 'don_confiao/index.html')


def buy(request):
    return HttpResponse("Nombre: ....")


def purchases(request):
    purchases = Sale.objects.all()
    context = {
        "purchases": purchases,
    }
    return render(request, 'don_confiao/purchases.html', context)


def products(request):
    rproducts = []
    products = Product.objects.all()
    for product in products:
        rproduct = {
            "name": product.name,
            "price_list": product.price,
            "uom": product.measuring_unit,
            "category": ""#.join('&', [c for c in product.categories])
        }
        rproducts.append(rproduct)

    return JsonResponse(rproducts, safe=False)

def products_index(request):
    return render(request, 'don_confiao/products_index.html')

def import_products(request):
    if request.method == "POST":
        form = ImportProductsForm(request.POST, request.FILES)
        if form.is_valid():
            handle_import_products_file(request.FILES["csv_file"])
            return HttpResponseRedirect("productos_index")
    else:
        form = ImportProductsForm()
    return render(
        request,
        "don_confiao/import_products.html",
        {'form': form}
    )

def handle_import_products_file(csv_file):
    data = io.StringIO(csv_file.read().decode('utf-8'))
    reader = csv.DictReader(data, quotechar='"')
    for row in reader:
        product = Product()
        product.name = row['producto']
        product.price = row['precio']
        product.measuring_unit = row['unidad']
        product.save()