import os

from django.template import Context, Engine, TemplateSyntaxError

from django.test import SimpleTestCase

from .utils import ROOT

RELATIVE = os.path.join(ROOT, "relative_templates")

class ExtendsRelativeBehaviorTests(SimpleTestCase):

    def test_normal_extend(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("one.html")

        output = template.render(Context({}))

        self.assertEqual(output.strip(), "three two one")

    def test_normal_extend_variable(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("one_var.html")

        output = template.render(Context({"tmpl": "./two.html"}))

        self.assertEqual(output.strip(), "three two one")

    def test_dir1_extend(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("dir1/one.html")

        output = template.render(Context({}))

        self.assertEqual(output.strip(), "three two one dir1 one")

    def test_dir1_extend1(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("dir1/one1.html")

        output = template.render(Context({}))

        self.assertEqual(output.strip(), "three two one dir1 one")

    def test_dir1_extend2(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("dir1/one2.html")

        output = template.render(Context({}))

        self.assertEqual(output.strip(), "three two one dir1 one")

    def test_dir1_extend3(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("dir1/one3.html")

        output = template.render(Context({}))

        self.assertEqual(output.strip(), "three two one dir1 one")

    def test_dir2_extend(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("dir1/dir2/one.html")

        output = template.render(Context({}))

        self.assertEqual(output.strip(), "three two one dir2 one")

    def test_extend_error(self):

        engine = Engine(dirs=[RELATIVE])

        msg = (

            "The relative path '\"./../two.html\"' points outside the file "

            "hierarchy that template 'error_extends.html' is in."

        )

        with self.assertRaisesMessage(TemplateSyntaxError, msg):

            engine.render_to_string("error_extends.html")

class IncludeRelativeBehaviorTests(SimpleTestCase):

    def test_normal_include(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("dir1/dir2/inc2.html")

        output = template.render(Context({}))

        self.assertEqual(output.strip(), "dir2 include")

    def test_normal_include_variable(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("dir1/dir2/inc3.html")

        output = template.render(Context({"tmpl": "./include_content.html"}))

        self.assertEqual(output.strip(), "dir2 include")

    def test_dir2_include(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("dir1/dir2/inc1.html")

        output = template.render(Context({}))

        self.assertEqual(output.strip(), "three")

    def test_include_error(self):

        engine = Engine(dirs=[RELATIVE])

        msg = (

            "The relative path '\"./../three.html\"' points outside the file "

            "hierarchy that template 'error_include.html' is in."

        )

        with self.assertRaisesMessage(TemplateSyntaxError, msg):

            engine.render_to_string("error_include.html")

class ExtendsMixedBehaviorTests(SimpleTestCase):

    def test_mixing1(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("dir1/two.html")

        output = template.render(Context({}))

        self.assertEqual(output.strip(), "three two one dir2 one dir1 two")

    def test_mixing2(self):

        engine = Engine(dirs=[RELATIVE])

        template = engine.get_template("dir1/three.html")

        output = template.render(Context({}))

        self.assertEqual(output.strip(), "three dir1 three")

    def test_mixing_loop(self):

        engine = Engine(dirs=[RELATIVE])

        msg = (

            "The relative path '\"./dir2/../looped.html\"' was translated to "

            "template name 'dir1/looped.html', the same template in which "

            "the tag appears."

        )

        with self.assertRaisesMessage(TemplateSyntaxError, msg):

            engine.render_to_string("dir1/looped.html")