from django.shortcuts import render, get_object_or_404
from django.core.exceptions import PermissionDenied
from django.contrib.auth.decorators import login_required, permission_required
from django.contrib.auth.models import User
from django.http import HttpResponse, Http404
import json
from gestioncof.models import CofProfile, Clipper
from kfet.models import Account
from kfet.forms import AccountTrigrammeForm, AccountForm, CofForm, UserForm

@login_required
def home(request):
    return render(request, "kfet/base.html")

def put_cleaned_data_in_dict(dict, form):
    for field in form.cleaned_data:
        dict[field] = form.cleaned_data[field]

@login_required
@permission_required('kfet.add_account')
def account_new(request):
    # A envoyer au template
    data_template = {
        'account_trigramme_form': AccountTrigrammeForm(),
        'post'      : False,
        'success'   : False,
        'trigramme' : '',
        'errors'    : {},
    }

    # Enregistrement
    if request.method == "POST":
        # Pour indiquer la tentative d'enregistrement au template
        data_template['post'] = True

        # Peuplement des forms
        username = request.POST.get('username')
        try:
            user = User.objects.filter(username=username).get()
            (cof, _) = CofProfile.objects.get_or_create(user=user)
            user_form      = UserForm(request.POST, instance=user)
            cof_form       = CofForm(request.POST, instance=cof)
        except User.DoesNotExist:
            user_form = UserForm(request.POST)
            cof_form  = CofForm(request.POST)
        trigramme_form = AccountTrigrammeForm(request.POST)
        account_form   = AccountForm(request.POST)
        # Ajout des erreurs pour le template
        data_template['errors']['user_form'] = user_form.errors
        data_template['errors']['cof_form']  = cof_form.errors
        data_template['errors']['trigramme_form'] = trigramme_form.errors
        data_template['errors']['account_form'] = account_form.errors

        if all((user_form.is_valid(), cof_form.is_valid(),
                trigramme_form.is_valid(), account_form.is_valid())):
            print(user_form.cleaned_data)
            data = {}
            # Fill data
            put_cleaned_data_in_dict(data, user_form)
            put_cleaned_data_in_dict(data, cof_form)

            account = Account()
            account.trigramme = trigramme_form.cleaned_data['trigramme']
            account.promo     = account_form.cleaned_data['promo']
            account.nickname  = account_form.cleaned_data['nickname']
            try:
                account.save_api(auth_user = request.user, data = data)
                data_template['success']   = True
                data_template['trigramme'] = account.trigramme
            except Account.UserHasAccount as e:
                data_template['errors']['global'] = \
                    "Cet utilisateur a déjà un compte K-Fêt : " + e.trigramme
            except PermissionDenied:
                print("perm")

    return render(request, "kfet/account_new.html", data_template)

def account_new_set_readonly_fields(user_form, cof_form):
    user_form.fields['username'].widget.attrs['readonly'] = True
    cof_form.fields['login_clipper'].widget.attrs['readonly'] = True
    cof_form.fields['is_cof'].widget.attrs['disabled'] = True

def account_new_ajax(request, username=None, login_clipper=None):
    user = None
    if login_clipper:
        # à partir d'un clipper
        # le user associé à ce clipper ne devrait pas encore existé
        clipper = get_object_or_404(Clipper, username = login_clipper)
        try:
            # Vérification que clipper ne soit pas déjà dans User
            user = User.objects.filter(username=login_clipper).get()
            # Ici, on nous a menti, le user existe déjà
            username = user.username
            login_clipper = None
        except User.DoesNotExist:
            # Clipper (sans user déjà existant)

            # UserForm - Prefill + Création
            user_initial_data = {
                    'username' : login_clipper,
                    'email'    : login_clipper + "@clipper.ens.fr"}
            if clipper.fullname:
                # Prefill du nom et prénom
                names = clipper.fullname.split()
                # Le premier, c'est le prénom
                user_initial_data['first_name'] = names[0]
                if len(names) > 1:
                    # Si d'autres noms -> tous dans le nom de famille
                    user_initial_data['last_name'] = " ".join(names[1:])
            user_form = UserForm(initial = user_initial_data)

            # CofForm - Prefill + Création
            cof_initial_data = { 'login_clipper': login_clipper }
            cof_form = CofForm(initial = cof_initial_data)

            # AccountForm
            account_form = AccountForm()

            # Protection (read-only) des champs username et login_clipper
            account_new_set_readonly_fields(user_form, cof_form)
    if username:
        # le user existe déjà
        user = get_object_or_404(User, username=username)
        # récupération du profil cof
        (cof, _) = CofProfile.objects.get_or_create(user=user)
        # UserForm + CofForm - Création à partir des instances existantes
        user_form = UserForm(instance = user)
        cof_form  = CofForm(instance = cof)
        # AccountForm
        account_form = AccountForm()
        # Protection (read-only) des champs username et login_clipper
        account_new_set_readonly_fields(user_form, cof_form)
    elif not login_clipper:
        # connaît pas du tout, faut tout remplir
        user_form    = UserForm()
        cof_form     = CofForm()
        account_form = AccountForm()

    return render(request, "kfet/account_new_form.html", {
            'account_form' : account_form,
            'cof_form'     : cof_form,
            'user_form'    : user_form,
            })

def account_is_free_ajax(request):
    if not request.GET.get("trigramme"):
        raise Http404
    trigramme = request.GET.get("trigramme")
    data = { 'is_free': Account.is_free(trigramme) }
    return HttpResponse(json.dumps(data), content_type = 'application/json')