from django.test import TestCase
from django.core import serializers
from markupfield.fields import MarkupField
from markupfield.markup import Markup, RestructuredtextMarkup
from markupfield.widgets import MarkupTextarea, AdminMarkupTextareaWidget
from markupfield.tests.models import Post, Article, Concrete, CustomArticle

from django.forms.models import modelform_factory


ArticleForm = modelform_factory(Article)


class MarkupFieldTestCase(TestCase):
    def setUp(self):
        self.mp = Post(title='example markdown post', body='**markdown**',
                       body_markup_type='text/x-markdown')
        self.mp.save()
        self.rp = Post(title='example restructuredtext post', body='*ReST*', body_markup_type='ReST')
        self.rp.save()

    def test_verbose_name(self):
        self.assertEquals(self.mp._meta.get_field('body').verbose_name, 'body of post')

    def test_markup_body(self):
        self.assertEquals(self.mp.body.raw, '**markdown**')
        self.assertEquals(self.mp.body.rendered, '<p><strong>markdown</strong></p>')
        self.assertEquals(self.mp.body.markup_type, 'text/x-markdown')

    def test_markup_unicode(self):
        u = unicode(self.rp.body.rendered)
        self.assertEquals(u, u'<p><em>ReST</em></p>\n')

    def test_from_database(self):
        " Test that data loads back from the database correctly and 'post' has the right type."
        p1 = Post.objects.get(pk=self.mp.pk)
        self.assert_(isinstance(p1.body, Markup))
        self.assertEquals(unicode(p1.body), u'<p><strong>markdown</strong></p>')

    ## Assignment ##
    def test_body_assignment(self):
        self.rp.body = '**ReST**'
        self.rp.save()
        self.assertEquals(unicode(self.rp.body), u'<p><strong>ReST</strong></p>\n')

    def test_raw_assignment(self):
        self.rp.body.raw = '*ReST*'
        self.rp.save()
        self.assertEquals(unicode(self.rp.body), u'<p><em>ReST</em></p>\n')

    def test_rendered_assignment(self):
        def f():
            self.rp.body.rendered = 'this should fail'
        self.assertRaises(AttributeError, f)

    def test_body_type_assignment(self):
        self.rp.body.markup_type = 'text/x-markdown'
        self.rp.save()
        self.assertEquals(self.rp.body.markup_type, 'text/x-markdown')
        self.assertEquals(unicode(self.rp.body), u'<p><em>ReST</em></p>')

    ## Serialization ##

    def test_serialize_to_json(self):
        stream = serializers.serialize('json', Post.objects.all())
        self.assertEquals(stream, '[{"pk": 1, "model": "tests.post", "fields": {"body": "**markdown**", "_body_rendered": "<p><strong>markdown</strong></p>", "body_markup_type": "text/x-markdown", "title": "example markdown post"}}, {"pk": 2, "model": "tests.post", "fields": {"body": "*ReST*", "_body_rendered": "<p><em>ReST</em></p>\\n", "body_markup_type": "ReST", "title": "example restructuredtext post"}}]')

    def test_deserialize_json(self):
        stream = serializers.serialize('json', Post.objects.all())
        obj = list(serializers.deserialize('json', stream))[0]
        self.assertEquals(obj.object, self.mp)

    ## Other ##

    def test_inheritance(self):
        # test that concrete correctly got the added fields
        concrete_fields = [f.name for f in Concrete._meta.fields]
        self.assertEquals(concrete_fields, ['id', 'content', 'content_markup_type', '_content_rendered'])

    def test_markup_type_validation(self):
        self.assertRaises(ValueError, MarkupField, 'verbose name', 'markup_field', 'bad_markup_type')
    
    def test_custom_markup_class(self):
        complex_rest = "Title of the article\n====================\n\nA paragraph with an *emphasized text*.\n\n"
        a = CustomArticle(text=complex_rest)
        a.save()
        self.assertEquals(type(a.text), RestructuredtextMarkup)
        self.assertEquals(a.text.rendered, 
            u'<div class="section" id="title-of-the-article">\n<h2>Title of the article</h2>\n<p>A paragraph with an <em>emphasized text</em>.</p>\n</div>\n')
        self.assertEquals(a.text.plaintext(), 
            u'Title of the article\n\nA paragraph with an emphasized text.')
        self.assertEquals(a.text.title(),
            u'Title of the article')


class MarkupWidgetTests(TestCase):
    def test_markuptextarea_used(self):
        self.assert_(isinstance(MarkupField().formfield().widget, MarkupTextarea))
        self.assert_(isinstance(ArticleForm()['normal_field'].field.widget, MarkupTextarea))

    def test_markuptextarea_render(self):
        a = Article(normal_field='**normal**', normal_field_markup_type='text/x-markdown',
                    default_field='**default**', markdown_field='**markdown**',
                    markup_choices_field_markup_type='nomarkup')
        a.save()
        af = ArticleForm(instance=a)
        self.assertEquals(unicode(af['normal_field']), u'<textarea id="id_normal_field" rows="10" cols="40" name="normal_field">**normal**</textarea>')

    def test_no_markup_type_field_if_set(self):
        'ensure that a field with non-editable markup_type set does not have a _markup_type field'
        self.assert_('markdown_field_markup_type' not in ArticleForm().fields.keys())

    def test_markup_type_choices(self):
        self.assertEquals(ArticleForm().fields['normal_field_markup_type'].choices,
                          [('text/x-markdown', 'text/x-markdown'), ('text/x-rst', 'text/x-rst')])
        self.assertEquals(ArticleForm().fields['markup_choices_field_markup_type'].choices,
                          [('pandamarkup', 'pandamarkup'), ('nomarkup', 'nomarkup')])

    def test_default_markup_type(self):
        self.assert_(ArticleForm().fields['normal_field_markup_type'].initial is None)
        self.assertEqual(ArticleForm().fields['default_field_markup_type'].initial, 'text/x-markdown')

    def test_model_admin_field(self):
        # borrows from regressiontests/admin_widgets/tests.py
        from django.contrib import admin
        ma = admin.ModelAdmin(Post, admin.site)
        self.assert_(isinstance(ma.formfield_for_dbfield(Post._meta.get_field('body')).widget,
                                AdminMarkupTextareaWidget))