import os
from datetime import date

from django.contrib.sitemaps import Sitemap
from django.contrib.sites.models import Site
from django.core.exceptions import ImproperlyConfigured
from django.test import modify_settings, override_settings
from django.utils import translation
from django.utils.formats import localize

from .base import SitemapTestsBase
from .models import TestModel


class HTTPSitemapTests(SitemapTestsBase):
    use_sitemap_err_msg = (
        'To use sitemaps, either enable the sites framework or pass a '
        'Site/RequestSite object in your view.'
    )

    def test_simple_sitemap_index(self):
        "A simple sitemap index can be rendered"
        response = self.client.get('/simple/index.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap><loc>%s/simple/sitemap-simple.xml</loc></sitemap>
</sitemapindex>
""" % self.base_url
        self.assertXMLEqual(response.content.decode(), expected_content)

    def test_sitemap_not_callable(self):
        """A sitemap may not be callable."""
        response = self.client.get('/simple-not-callable/index.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap><loc>%s/simple/sitemap-simple.xml</loc></sitemap>
</sitemapindex>
""" % self.base_url
        self.assertXMLEqual(response.content.decode(), expected_content)

    def test_paged_sitemap(self):
        """A sitemap may have multiple pages."""
        response = self.client.get('/simple-paged/index.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap><loc>{0}/simple/sitemap-simple.xml</loc></sitemap><sitemap><loc>{0}/simple/sitemap-simple.xml?p=2</loc></sitemap>
</sitemapindex>
""".format(self.base_url)
        self.assertXMLEqual(response.content.decode(), expected_content)

    @override_settings(TEMPLATES=[{
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(os.path.dirname(__file__), 'templates')],
    }])
    def test_simple_sitemap_custom_index(self):
        "A simple sitemap index can be rendered with a custom template"
        response = self.client.get('/simple/custom-index.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<!-- This is a customised template -->
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap><loc>%s/simple/sitemap-simple.xml</loc></sitemap>
</sitemapindex>
""" % self.base_url
        self.assertXMLEqual(response.content.decode(), expected_content)

    def test_simple_sitemap_section(self):
        "A simple sitemap section can be rendered"
        response = self.client.get('/simple/sitemap-simple.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
<url><loc>%s/location/</loc><lastmod>%s</lastmod><changefreq>never</changefreq><priority>0.5</priority></url>
</urlset>
""" % (self.base_url, date.today())
        self.assertXMLEqual(response.content.decode(), expected_content)

    def test_no_section(self):
        response = self.client.get('/simple/sitemap-simple2.xml')
        self.assertEqual(str(response.context['exception']), "No sitemap available for section: 'simple2'")
        self.assertEqual(response.status_code, 404)

    def test_empty_page(self):
        response = self.client.get('/simple/sitemap-simple.xml?p=0')
        self.assertEqual(str(response.context['exception']), 'Page 0 empty')
        self.assertEqual(response.status_code, 404)

    def test_page_not_int(self):
        response = self.client.get('/simple/sitemap-simple.xml?p=test')
        self.assertEqual(str(response.context['exception']), "No page 'test'")
        self.assertEqual(response.status_code, 404)

    def test_simple_sitemap(self):
        "A simple sitemap can be rendered"
        response = self.client.get('/simple/sitemap.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
<url><loc>%s/location/</loc><lastmod>%s</lastmod><changefreq>never</changefreq><priority>0.5</priority></url>
</urlset>
""" % (self.base_url, date.today())
        self.assertXMLEqual(response.content.decode(), expected_content)

    @override_settings(TEMPLATES=[{
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(os.path.dirname(__file__), 'templates')],
    }])
    def test_simple_custom_sitemap(self):
        "A simple sitemap can be rendered with a custom template"
        response = self.client.get('/simple/custom-sitemap.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<!-- This is a customised template -->
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url><loc>%s/location/</loc><lastmod>%s</lastmod><changefreq>never</changefreq><priority>0.5</priority></url>
</urlset>
""" % (self.base_url, date.today())
        self.assertXMLEqual(response.content.decode(), expected_content)

    def test_sitemap_last_modified(self):
        "Last-Modified header is set correctly"
        response = self.client.get('/lastmod/sitemap.xml')
        self.assertEqual(response.headers['Last-Modified'], 'Wed, 13 Mar 2013 10:00:00 GMT')

    def test_sitemap_last_modified_date(self):
        """
        The Last-Modified header should be support dates (without time).
        """
        response = self.client.get('/lastmod/date-sitemap.xml')
        self.assertEqual(response.headers['Last-Modified'], 'Wed, 13 Mar 2013 00:00:00 GMT')

    def test_sitemap_last_modified_tz(self):
        """
        The Last-Modified header should be converted from timezone aware dates
        to GMT.
        """
        response = self.client.get('/lastmod/tz-sitemap.xml')
        self.assertEqual(response.headers['Last-Modified'], 'Wed, 13 Mar 2013 15:00:00 GMT')

    def test_sitemap_last_modified_missing(self):
        "Last-Modified header is missing when sitemap has no lastmod"
        response = self.client.get('/generic/sitemap.xml')
        self.assertFalse(response.has_header('Last-Modified'))

    def test_sitemap_last_modified_mixed(self):
        "Last-Modified header is omitted when lastmod not on all items"
        response = self.client.get('/lastmod-mixed/sitemap.xml')
        self.assertFalse(response.has_header('Last-Modified'))

    def test_sitemaps_lastmod_mixed_ascending_last_modified_missing(self):
        """
        The Last-Modified header is omitted when lastmod isn't found in all
        sitemaps. Test sitemaps are sorted by lastmod in ascending order.
        """
        response = self.client.get('/lastmod-sitemaps/mixed-ascending.xml')
        self.assertFalse(response.has_header('Last-Modified'))

    def test_sitemaps_lastmod_mixed_descending_last_modified_missing(self):
        """
        The Last-Modified header is omitted when lastmod isn't found in all
        sitemaps. Test sitemaps are sorted by lastmod in descending order.
        """
        response = self.client.get('/lastmod-sitemaps/mixed-descending.xml')
        self.assertFalse(response.has_header('Last-Modified'))

    def test_sitemaps_lastmod_ascending(self):
        """
        The Last-Modified header is set to the most recent sitemap lastmod.
        Test sitemaps are sorted by lastmod in ascending order.
        """
        response = self.client.get('/lastmod-sitemaps/ascending.xml')
        self.assertEqual(response.headers['Last-Modified'], 'Sat, 20 Apr 2013 05:00:00 GMT')

    def test_sitemaps_lastmod_descending(self):
        """
        The Last-Modified header is set to the most recent sitemap lastmod.
        Test sitemaps are sorted by lastmod in descending order.
        """
        response = self.client.get('/lastmod-sitemaps/descending.xml')
        self.assertEqual(response.headers['Last-Modified'], 'Sat, 20 Apr 2013 05:00:00 GMT')

    @override_settings(USE_I18N=True, USE_L10N=True)
    def test_localized_priority(self):
        """The priority value should not be localized."""
        with translation.override('fr'):
            self.assertEqual('0,3', localize(0.3))
            # Priorities aren't rendered in localized format.
            response = self.client.get('/simple/sitemap.xml')
            self.assertContains(response, '<priority>0.5</priority>')
            self.assertContains(response, '<lastmod>%s</lastmod>' % date.today())

    @modify_settings(INSTALLED_APPS={'remove': 'django.contrib.sites'})
    def test_requestsite_sitemap(self):
        # Hitting the flatpages sitemap without the sites framework installed
        # doesn't raise an exception.
        response = self.client.get('/simple/sitemap.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
<url><loc>http://testserver/location/</loc><lastmod>%s</lastmod><changefreq>never</changefreq><priority>0.5</priority></url>
</urlset>
""" % date.today()
        self.assertXMLEqual(response.content.decode(), expected_content)

    def test_sitemap_get_urls_no_site_1(self):
        """
        Check we get ImproperlyConfigured if we don't pass a site object to
        Sitemap.get_urls and no Site objects exist
        """
        Site.objects.all().delete()
        with self.assertRaisesMessage(ImproperlyConfigured, self.use_sitemap_err_msg):
            Sitemap().get_urls()

    @modify_settings(INSTALLED_APPS={'remove': 'django.contrib.sites'})
    def test_sitemap_get_urls_no_site_2(self):
        """
        Check we get ImproperlyConfigured when we don't pass a site object to
        Sitemap.get_urls if Site objects exists, but the sites framework is not
        actually installed.
        """
        with self.assertRaisesMessage(ImproperlyConfigured, self.use_sitemap_err_msg):
            Sitemap().get_urls()

    def test_sitemap_item(self):
        """
        Check to make sure that the raw item is included with each
        Sitemap.get_url() url result.
        """
        test_sitemap = Sitemap()
        test_sitemap.items = TestModel.objects.order_by('pk').all

        def is_testmodel(url):
            return isinstance(url['item'], TestModel)
        item_in_url_info = all(map(is_testmodel, test_sitemap.get_urls()))
        self.assertTrue(item_in_url_info)

    def test_cached_sitemap_index(self):
        """
        A cached sitemap index can be rendered (#2713).
        """
        response = self.client.get('/cached/index.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap><loc>%s/cached/sitemap-simple.xml</loc></sitemap>
</sitemapindex>
""" % self.base_url
        self.assertXMLEqual(response.content.decode(), expected_content)

    def test_x_robots_sitemap(self):
        response = self.client.get('/simple/index.xml')
        self.assertEqual(response.headers['X-Robots-Tag'], 'noindex, noodp, noarchive')

        response = self.client.get('/simple/sitemap.xml')
        self.assertEqual(response.headers['X-Robots-Tag'], 'noindex, noodp, noarchive')

    def test_empty_sitemap(self):
        response = self.client.get('/empty/sitemap.xml')
        self.assertEqual(response.status_code, 200)

    @override_settings(LANGUAGES=(('en', 'English'), ('pt', 'Portuguese')))
    def test_simple_i18n_sitemap_index(self):
        """
        A simple i18n sitemap index can be rendered.
        """
        response = self.client.get('/simple/i18n.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
<url><loc>{0}/en/i18n/testmodel/{1}/</loc><changefreq>never</changefreq><priority>0.5</priority></url><url><loc>{0}/pt/i18n/testmodel/{1}/</loc><changefreq>never</changefreq><priority>0.5</priority></url>
</urlset>
""".format(self.base_url, self.i18n_model.pk)
        self.assertXMLEqual(response.content.decode(), expected_content)

    @override_settings(LANGUAGES=(('en', 'English'), ('pt', 'Portuguese')))
    def test_alternate_i18n_sitemap_index(self):
        """
        A i18n sitemap with alternate/hreflang links can be rendered.
        """
        response = self.client.get('/alternates/i18n.xml')
        url, pk = self.base_url, self.i18n_model.pk
        expected_urls = f"""
<url><loc>{url}/en/i18n/testmodel/{pk}/</loc><changefreq>never</changefreq><priority>0.5</priority>
<xhtml:link rel="alternate" hreflang="en" href="{url}/en/i18n/testmodel/{pk}/"/>
<xhtml:link rel="alternate" hreflang="pt" href="{url}/pt/i18n/testmodel/{pk}/"/>
</url>
<url><loc>{url}/pt/i18n/testmodel/{pk}/</loc><changefreq>never</changefreq><priority>0.5</priority>
<xhtml:link rel="alternate" hreflang="en" href="{url}/en/i18n/testmodel/{pk}/"/>
<xhtml:link rel="alternate" hreflang="pt" href="{url}/pt/i18n/testmodel/{pk}/"/>
</url>
""".replace('\n', '')
        expected_content = f"""<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
{expected_urls}
</urlset>
"""
        self.assertXMLEqual(response.content.decode(), expected_content)

    @override_settings(LANGUAGES=(('en', 'English'), ('pt', 'Portuguese'), ('es', 'Spanish')))
    def test_alternate_i18n_sitemap_limited(self):
        """
        A i18n sitemap index with limited languages can be rendered.
        """
        response = self.client.get('/limited/i18n.xml')
        url, pk = self.base_url, self.i18n_model.pk
        expected_urls = f"""
<url><loc>{url}/en/i18n/testmodel/{pk}/</loc><changefreq>never</changefreq><priority>0.5</priority>
<xhtml:link rel="alternate" hreflang="en" href="{url}/en/i18n/testmodel/{pk}/"/>
<xhtml:link rel="alternate" hreflang="es" href="{url}/es/i18n/testmodel/{pk}/"/>
</url>
<url><loc>{url}/es/i18n/testmodel/{pk}/</loc><changefreq>never</changefreq><priority>0.5</priority>
<xhtml:link rel="alternate" hreflang="en" href="{url}/en/i18n/testmodel/{pk}/"/>
<xhtml:link rel="alternate" hreflang="es" href="{url}/es/i18n/testmodel/{pk}/"/>
</url>
""".replace('\n', '')
        expected_content = f"""<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
{expected_urls}
</urlset>
"""
        self.assertXMLEqual(response.content.decode(), expected_content)

    @override_settings(LANGUAGES=(('en', 'English'), ('pt', 'Portuguese')))
    def test_alternate_i18n_sitemap_xdefault(self):
        """
        A i18n sitemap index with x-default can be rendered.
        """
        response = self.client.get('/x-default/i18n.xml')
        url, pk = self.base_url, self.i18n_model.pk
        expected_urls = f"""
<url><loc>{url}/en/i18n/testmodel/{pk}/</loc><changefreq>never</changefreq><priority>0.5</priority>
<xhtml:link rel="alternate" hreflang="en" href="{url}/en/i18n/testmodel/{pk}/"/>
<xhtml:link rel="alternate" hreflang="pt" href="{url}/pt/i18n/testmodel/{pk}/"/>
<xhtml:link rel="alternate" hreflang="x-default" href="{url}/i18n/testmodel/{pk}/"/>
</url>
<url><loc>{url}/pt/i18n/testmodel/{pk}/</loc><changefreq>never</changefreq><priority>0.5</priority>
<xhtml:link rel="alternate" hreflang="en" href="{url}/en/i18n/testmodel/{pk}/"/>
<xhtml:link rel="alternate" hreflang="pt" href="{url}/pt/i18n/testmodel/{pk}/"/>
<xhtml:link rel="alternate" hreflang="x-default" href="{url}/i18n/testmodel/{pk}/"/>
</url>
""".replace('\n', '')
        expected_content = f"""<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
{expected_urls}
</urlset>
"""
        self.assertXMLEqual(response.content.decode(), expected_content)

    def test_sitemap_without_entries(self):
        response = self.client.get('/sitemap-without-entries/sitemap.xml')
        expected_content = """<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">

</urlset>"""
        self.assertXMLEqual(response.content.decode(), expected_content)