""" import books from another app """
import math

from django.contrib.auth.decorators import login_required
from django.core.exceptions import PermissionDenied
from django.core.paginator import Paginator
from django.shortcuts import get_object_or_404
from django.template.response import TemplateResponse
from django.utils.decorators import method_decorator
from django.views import View

from bookwyrm import models
from bookwyrm.settings import PAGE_LENGTH

# pylint: disable= no-self-use
@method_decorator(login_required, name="dispatch")
class ImportStatus(View):
    """status of an existing import"""

    def get(self, request, job_id):
        """status of an import job"""
        job = get_object_or_404(models.ImportJob, id=job_id)
        if job.user != request.user:
            raise PermissionDenied()

        items = job.items.order_by("index")
        pending_items = items.filter(fail_reason__isnull=True, book__isnull=True)
        item_count = items.count() or 1

        paginated = Paginator(items, PAGE_LENGTH)
        page = paginated.get_page(request.GET.get("page"))
        data = {
            "job": job,
            "items": page,
            "manual_review_count": items.filter(
                fail_reason__isnull=False, book_guess__isnull=False, book__isnull=True
            ).count(),
            "fail_count": items.filter(
                fail_reason__isnull=False, book_guess__isnull=True
            ).count(),
            "page_range": paginated.get_elided_page_range(
                page.number, on_each_side=2, on_ends=1
            ),
            "complete": not pending_items.exists(),
            "percent": math.floor(  # pylint: disable=c-extension-no-member
                (item_count - pending_items.count()) / item_count * 100
            ),
        }

        return TemplateResponse(request, "import/import_status.html", data)