from django.http import HttpResponse
from django.template import loader
from django.shortcuts import get_object_or_404, render
from .models import *
from .forms import *
from django.db.models import Q
import re
import datetime

# Create your views here.


def index(request):
    rooms = Room.objects.all()
    rooms = rooms.order_by('room_number')
    template = loader.get_template('index.html')

    return HttpResponse(template.render({'rooms': rooms}, request))


def reservation(request):
    room_number, begin_date, end_date = request.POST['room'], request.POST['begindate'], request.POST['enddate']
    try:
        begin_datetime = datetime.datetime.strptime(begin_date, "%Y-%m-%d")
        end_datetime = datetime.datetime.strptime(end_date, "%Y-%m-%d")
    except:
        return HttpResponse(loader.get_template('error.html').render({'error': "Błąd przy datach"}, request))
    if begin_datetime == '' or end_datetime == '' or end_datetime < begin_datetime or begin_datetime < datetime.datetime.today() or end_datetime < datetime.datetime.today():
        return HttpResponse(loader.get_template('error.html').render({'error': "Błąd przy datach"}, request))

    template = loader.get_template('reservation.html')
    error = ""
    reservation = Reservation.objects.filter(room_number=room_number).filter(Q(begin_date__range=(begin_datetime, end_datetime)) | Q(end_date__range=(begin_datetime, end_datetime))).first()
    if not reservation is None:
        status = "Pokój " + str(room_number) + " jest już zarezerwowany"
        return HttpResponse(template.render({'status': status}, request))

    else:
        if request.method == "POST":
            try:
                client_id = request.POST['id_number']

                if check(client_id):
                    if Client.objects.filter(id_number=client_id).first() is None:
                        client = ClientForm(request.POST)
                        client.save()

                    r = Reservation()
                    r.room_number = get_object_or_404(Room, room_number=room_number)
                    r.client_id = get_object_or_404(Client, id_number=client_id)
                    r.begin_date = begin_date
                    r.end_date = end_date
                    r.save()

                    status = "Pokój " + str(room_number) + " został pomyślnie zarejestrowany"
                    return HttpResponse(template.render({'status': status}, request))

                error = "Numer dowodu nieprawidłowy"
            except:
                pass
        form = ClientForm()
        template = loader.get_template('form.html')
        return HttpResponse(template.render({'form': form, 'error': error, 'room_number': room_number, 'begin_date': begin_date, 'end_date': end_date}, request))


def check(numer):
    pattern = re.compile(r'[A-Z][A-Z][A-Z]\d\d\d\d\d\d')

    return pattern.match(numer)