from django.contrib.auth.decorators import login_required
from django.shortcuts import render, get_object_or_404, redirect
from .models import Item
from .forms import ItemForm


SORT_MAP = {
    'fav':      ['-favorite', 'name'],
    'az':       ['name'],
    'za':       ['-name'],
    'newest':   ['-created_at'],
    'oldest':   ['created_at'],
    'progress': ['-progress_percent'],
}


@login_required
def item_list(request):
    category = request.GET.get('category', '')
    sort = request.GET.get('sort', 'fav')

    items = Item.objects.all()
    if category:
        items = items.filter(category=category)
    items = items.order_by(*SORT_MAP.get(sort, SORT_MAP['fav']))

    return render(request, 'backlogger/list.html', {
        'items': items,
        'category': category,
        'sort': sort,
        'categories': Item.CATEGORY_CHOICES,
    })


@login_required
def item_add(request):
    if request.method == 'POST':
        form = ItemForm(request.POST)
        if form.is_valid():
            form.save()
            return redirect('backlogger:list')
    else:
        form = ItemForm()
    return render(request, 'backlogger/item_form.html', {'form': form, 'action': 'Add'})


@login_required
def item_edit(request, pk):
    item = get_object_or_404(Item, pk=pk)
    if request.method == 'POST':
        form = ItemForm(request.POST, instance=item)
        if form.is_valid():
            form.save()
            return redirect('backlogger:list')
    else:
        form = ItemForm(instance=item)
    return render(request, 'backlogger/item_form.html', {'form': form, 'action': 'Edit', 'item': item})


@login_required
def item_delete(request, pk):
    if request.method == 'POST':
        get_object_or_404(Item, pk=pk).delete()
    return redirect('backlogger:list')