from django.contrib import messages
from django.http import HttpResponseForbidden
from django.shortcuts import redirect, render

from .forms import ExistingListItemForm, ItemForm
from .models import Item, List
from apps.lyric.models import User


UNLOCKED_THEMES = frozenset(["theme-default"])


def home_page(request):
    return render(request, "apps/dashboard/home.html", {"form": ItemForm()})

def new_list(request):
    form = ItemForm(data=request.POST)
    if form.is_valid():
        nulist = List.objects.create()
        if request.user.is_authenticated:
            nulist.owner = request.user
            nulist.save()
        form.save(for_list=nulist)
        return redirect(nulist)
    else:
        return render(request, "apps/dashboard/home.html", {"form": form})

def view_list(request, list_id):
    our_list = List.objects.get(id=list_id)

    if our_list.owner:
        if not request.user.is_authenticated:
            return redirect("/")
        if request.user != our_list.owner and request.user not in our_list.shared_with.all():
            return HttpResponseForbidden()

    form = ExistingListItemForm(for_list=our_list)

    if request.method == "POST":
        form = ExistingListItemForm(for_list=our_list, data=request.POST)
        if form.is_valid():
            form.save()
            return redirect(our_list)
    return render(request, "apps/dashboard/list.html", {"list": our_list, "form": form})
            
def my_lists(request, user_id):
    owner = User.objects.get(id=user_id)
    if not request.user.is_authenticated:
        return redirect("/")
    if request.user.id != owner.id:
        return HttpResponseForbidden()
    return render(request, "apps/dashboard/my_lists.html", {"owner": owner})

def share_list(request, list_id):
    our_list = List.objects.get(id=list_id)
    try:
        recipient = User.objects.get(email=request.POST["recipient"])
        if recipient == request.user:
            return redirect(our_list)
        our_list.shared_with.add(recipient)
    except User.DoesNotExist:
        pass
    messages.success(request, "An invite has been sent if that address is registered.")
    return redirect(our_list)

def set_theme(request):
    if not request.user.is_authenticated:
        return redirect("home")
    if request.method == "POST":
        theme = request.POST.get("theme", "")
        if theme in UNLOCKED_THEMES:
            request.user.theme = theme
            request.user.save(update_fields=["theme"])
    return redirect("home")