from secrets import token_urlsafe
from monero.seed import Seed
from django.test import TestCase
from django.contrib.auth.models import User
from django.core.paginator import Page
from django.shortcuts import reverse
from django.test.client import Client
from items.models import Item
from bids.models import ItemBid


class ItemBidViewsTestCase(TestCase):
    def setUp(self):
        self.client = Client()
        self.seller_password = token_urlsafe(32)
        self.buyer_password = token_urlsafe(32)

        self.seller = User.objects.create_user(
            'seller', password=self.seller_password
        )
        self.buyer = User.objects.create_user(
            'buyer', password=self.buyer_password
        )
        self.payout_address = Seed().public_address()
        self.return_address = Seed().public_address()
        self.whereabouts = 'Los Angeles, CA'

        self.test_item = Item.objects.create(
            owner=self.seller,
            name='Test Item',
            description='Test item',
            ask_price_xmr=0.3,
            payout_address=self.payout_address,
            whereabouts=self.whereabouts
        )

    def test_list_bids_requires_auth(self):
        response = self.client.get(reverse('list_bids'))
        self.assertTrue(response.url.startswith(reverse('login')))
        self.assertEqual(response.status_code, 302)


    def test_list_bids_returns_pagination(self):
        ItemBid.objects.create(
            item=self.test_item,
            bidder=self.buyer,
            bid_price_xmr=0.1,
            return_address=self.return_address
        )
        self.client.login(username=self.buyer.username, password=self.buyer_password)
        response = self.client.get(reverse('list_bids'))
        response_w_str_arg = self.client.get(reverse('list_bids') + "?page=bar")
        response_w_empty_pg = self.client.get(reverse('list_bids') + "?page=9001")
        self.client.logout()
        self.assertTrue(isinstance(response.context['bids'], Page), 'Paginated object not returned')
        self.assertTrue(isinstance(response_w_str_arg.context['bids'], Page), 'Paginated object not returned')
        self.assertTrue(isinstance(response_w_empty_pg.context['bids'], Page), 'Paginated object not returned')

    def test_list_bids_returns_only_user_bids(self):
        for i in range(1, 20):
            u = User.objects.create_user(f'list_bids_test{i}', password=token_urlsafe(16))
            ItemBid.objects.create(
                item=self.test_item,
                bidder=u,
                bid_price_xmr=0.2,
                return_address=self.return_address
            )

        ItemBid.objects.create(
            item=self.test_item,
            bidder=self.buyer,
            bid_price_xmr=0.1,
            return_address=self.return_address
        )

        self.client.login(username=self.buyer.username, password=self.buyer_password)
        response = self.client.get(reverse('list_bids'))
        self.client.logout()

        # Test that buyer's bids are the only bids returned from view
        all_bids = ItemBid.objects.all()
        user_bids = all_bids.filter(bidder=self.buyer)
        self.assertEqual(len(user_bids), len(response.context['bids']))
        self.assertLess(len(user_bids), len(all_bids))

        # Test that each bid belongs to the buyer
        for bid in response.context['bids']:
            self.assertEqual(bid.bidder, self.buyer)

    def test_create_bid_requires_auth(self):
        response = self.client.get(reverse('create_bid', args=[self.test_item.id]))
        self.assertTrue(response.url.startswith(reverse('login')))
        self.assertEqual(response.status_code, 302)

    def test_create_bid_redirects_home_if_item_id_missing(self):
        self.client.login(username=self.buyer.username, password=self.buyer_password)
        response = self.client.get(reverse('create_bid', args=[9999]))
        self.client.logout()
        self.assertTrue(response.url.startswith(reverse('home')))
        self.assertEqual(response.status_code, 302)

    def test_create_bid_redirects_to_edit_if_bid_already_posted(self):
        existing_bid = ItemBid.objects.create(
            item=self.test_item,
            bidder=self.buyer,
            bid_price_xmr=0.2,
            return_address=self.return_address
        )
        self.client.login(username=self.buyer.username, password=self.buyer_password)
        response = self.client.get(reverse('create_bid', args=[self.test_item.id]))
        self.client.logout()
        self.assertTrue(response.url.startswith(reverse('edit_bid', args=[existing_bid.id])))
        self.assertEqual(response.status_code, 302)