from django.core.urlresolvers import reverse
from django.http import Http404
from django.test import TestCase

from misago.core.shortcuts import get_int_or_404


class PaginateTests(TestCase):
    urls = 'misago.core.testproject.urls'

    def test_valid_page_handling(self):
        """Valid page number causes no errors"""
        response = self.client.get(
            reverse('test-pagination', kwargs={'page': 2}))
        self.assertEqual("5,6,7,8,9", response.content)

    def test_invalid_page_handling(self):
        """Invalid page number results in 404 error"""
        response = self.client.get(
            reverse('test-pagination', kwargs={'page': 42}))
        self.assertEqual(response.status_code, 404)

    def test_implicit_page_handling(self):
        """Implicit page number causes no errors"""
        response = self.client.get(
            reverse('test-pagination'))
        self.assertEqual("0,1,2,3,4", response.content)

    def test_explicit_page_handling(self):
        """Explicit page number results in redirect"""
        response = self.client.get(
            reverse('test-pagination', kwargs={'page': 1}))
        valid_url = "http://testserver/forum/test-pagination/"
        self.assertEqual(response['Location'], valid_url)


class ValidateSlugTests(TestCase):
    urls = 'misago.core.testproject.urls'

    def test_valid_slug_handling(self):
        """Valid slug causes no interruption in view processing"""
        response = self.client.get(reverse('validate-slug-view', kwargs={
            'slug': 'eric-the-fish',
            'pk': 1,
        }))
        self.assertIn("Allright", response.content)

    def test_invalid_slug_handling(self):
        """Invalid slug returns in redirect to valid page"""
        response = self.client.get(reverse('validate-slug-view', kwargs={
            'slug': 'lion-the-eric',
            'pk': 1,
        }))

        valid_url = "http://testserver/forum/test-valid-slug/eric-the-fish-1/"
        self.assertEqual(response['Location'], valid_url)


class GetIntOr404(TestCase):
    def test_valid_inputs(self):
        """get_int_or_404 returns int for valid values"""
        VALID_VALUES = (
            ('0', 0),
            ('123', 123),
            ('000123', 123),
            ('1', 1),
        )

        for value, result in VALID_VALUES:
            self.assertEqual(get_int_or_404(value), result)

    def test_invalid_inputs(self):
        """get_int_or_404 raises Http404 for invalid values"""
        INVALID_VALUES = (
            None,
            '',
            'bob',
            '1bob',
            'b0b',
            'bob123',
            '12.321',
            '.4',
            '5.',
        )

        for value in INVALID_VALUES:
            with self.assertRaises(Http404):
                get_int_or_404(value)