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")