import os
import unittest
from io import BytesIO

import willow
from django import forms, template
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured, ValidationError
from django.core.files.uploadedfile import InMemoryUploadedFile, TemporaryUploadedFile
from django.test import TestCase, override_settings
from django.test.signals import setting_changed
from django.urls import reverse
from taggit.forms import TagField, TagWidget
from willow.image import (
    AvifImageFile,
    PNGImageFile,
    SvgImageFile,
)
from willow.image import ImageFile as WillowImageFile

from wagtail.images import get_image_model, get_image_model_string
from wagtail.images.fields import WagtailImageField
from wagtail.images.formats import Format, get_image_format, register_image_format
from wagtail.images.forms import get_image_form
from wagtail.images.models import Image as WagtailImage
from wagtail.images.permissions import update_permission_policy
from wagtail.images.rect import Rect, Vector
from wagtail.images.utils import generate_signature, verify_signature
from wagtail.images.views.serve import ServeView
from wagtail.test.testapp.models import CustomImage, CustomImageFilePath
from wagtail.test.utils import WagtailTestUtils, disconnect_signal_receiver

from .utils import (
    Image,
    get_test_image_file,
    get_test_image_file_avif,
    get_test_image_file_svg,
)

try:
    import sendfile  # noqa: F401

    sendfile_mod = True
except ImportError:
    sendfile_mod = False


class TestImageTag(TestCase):
    def setUp(self):
        # Create an image for running tests on
        self.image = Image.objects.create(
            title="Test image",
            file=get_test_image_file(),
        )

    def render_image_tag(self, image, filter_spec):
        temp = template.Template(
            "{% load wagtailimages_tags %}{% image image_obj " + filter_spec + "%}"
        )
        context = template.Context({"image_obj": image})
        return temp.render(context)

    def test_image_tag(self):
        result = self.render_image_tag(self.image, "width-400")

        # Check that all the required HTML attributes are set
        self.assertIn('width="400"', result)
        self.assertIn('height="300"', result)
        self.assertIn('alt="Test image"', result)

    def test_image_tag_none(self):
        result = self.render_image_tag(None, "width-500")
        self.assertEqual(result, "")

    def test_image_tag_wrong_type(self):
        with self.assertRaises(ValueError):
            self.render_image_tag("foobar", "width-500")

    def render_image_tag_as(self, image, filter_spec):
        temp = template.Template(
            "{% load wagtailimages_tags %}{% image image_obj "
            + filter_spec
            + " as test_img %}<img {{ test_img.attrs }} />"
        )
        context = template.Context({"image_obj": image})
        return temp.render(context)

    def test_image_tag_attrs(self):
        result = self.render_image_tag_as(self.image, "width-400")

        # Check that all the required HTML attributes are set
        self.assertIn('width="400"', result)
        self.assertIn('height="300"', result)
        self.assertIn('alt="Test image"', result)

    def render_image_tag_with_extra_attributes(self, image, title):
        temp = template.Template(
            '{% load wagtailimages_tags %}{% image image_obj width-400 \
            class="photo" title=title|lower alt="Alternate" %}'
        )
        context = template.Context({"image_obj": image, "title": title})
        return temp.render(context)

    def test_image_tag_with_extra_attributes(self):
        result = self.render_image_tag_with_extra_attributes(
            self.image, "My Wonderful Title"
        )

        # Check that all the required HTML attributes are set
        self.assertIn('width="400"', result)
        self.assertIn('height="300"', result)
        self.assertIn('class="photo"', result)
        self.assertIn('alt="Alternate"', result)
        self.assertIn('title="my wonderful title"', result)

    def render_image_tag_with_filters(self, image):
        temp = template.Template(
            "{% load wagtailimages_tags %}{% image image_primary|default:image_alternate width-400 %}"
        )
        context = template.Context({"image_primary": None, "image_alternate": image})
        return temp.render(context)

    def test_image_tag_with_filters(self):
        result = self.render_image_tag_with_filters(self.image)
        self.assertIn('width="400"', result)
        self.assertIn('height="300"', result)

    def test_image_tag_with_chained_filters(self):
        result = self.render_image_tag(self.image, "fill-200x200 height-150")
        self.assertIn('width="150"', result)
        self.assertIn('height="150"', result)

    def test_filter_specs_must_match_allowed_pattern(self):
        with self.assertRaises(template.TemplateSyntaxError):
            self.render_image_tag(self.image, "fill-200x200|height-150")

        with self.assertRaises(template.TemplateSyntaxError):
            self.render_image_tag(self.image, 'fill-800x600 alt"test"')

    def test_context_may_only_contain_one_argument(self):
        with self.assertRaises(template.TemplateSyntaxError):
            temp = template.Template(
                "{% load wagtailimages_tags %}{% image image_obj fill-200x200"
                " as test_img this_one_should_not_be_there %}<img {{ test_img.attrs }} />"
            )
            context = template.Context({"image_obj": self.image})
            temp.render(context)

    def test_no_image_filter_provided(self):
        # if image template gets the image but no filters
        with self.assertRaises(template.TemplateSyntaxError):
            temp = template.Template(
                "{% load wagtailimages_tags %}{% image image_obj %}"
            )
            context = template.Context({"image_obj": self.image})
            temp.render(context)

    def test_no_image_filter_provided_when_using_as(self):
        # if image template gets the image but no filters
        with self.assertRaises(template.TemplateSyntaxError):
            temp = template.Template(
                "{% load wagtailimages_tags %}{% image image_obj as foo %}"
            )
            context = template.Context({"image_obj": self.image})
            temp.render(context)

    def test_no_image_filter_provided_but_attributes_provided(self):
        # if image template gets the image but no filters
        with self.assertRaises(template.TemplateSyntaxError):
            temp = template.Template(
                '{% load wagtailimages_tags %}{% image image_obj class="cover-image"%}'
            )
            context = template.Context({"image_obj": self.image})
            temp.render(context)

    def render_image_url_tag(self, image, view_name):
        temp = template.Template(
            '{% load wagtailimages_tags %}{% image_url image_obj "width-400" "'
            + view_name
            + '" %}'
        )
        context = template.Context({"image_obj": image})
        return temp.render(context)

    def test_image_url(self):
        result = self.render_image_url_tag(self.image, "wagtailimages_serve")
        self.assertRegex(
            result,
            "/images/.*/width-400/{}".format(self.image.file.name.split("/")[-1]),
        )

    def test_image_url_custom_view(self):
        result = self.render_image_url_tag(
            self.image, "wagtailimages_serve_custom_view"
        )

        self.assertRegex(
            result,
            "/testimages/custom_view/.*/width-400/{}".format(
                self.image.file.name.split("/")[-1]
            ),
        )

    def test_image_url_no_imageserve_view_added(self):
        # if image_url tag is used, but the image serve view was not defined.
        with self.assertRaises(ImproperlyConfigured):
            temp = template.Template(
                '{% load wagtailimages_tags %}{% image_url image_obj "width-400" "mynonexistingimageserve_view" %}'
            )
            context = template.Context({"image_obj": self.image})
            temp.render(context)


class TestMissingImage(TestCase):
    """
    Missing image files in media/original_images should be handled gracefully, to cope with
    pulling live databases to a development instance without copying the corresponding image files.
    In this case, it's acceptable to render broken images, but not to fail rendering the page outright.
    """

    fixtures = ["test.json"]

    def test_image_tag_with_missing_image(self):
        # the page /events/christmas/ has a missing image as the feed image
        response = self.client.get("/events/christmas/")
        self.assertContains(
            response,
            '<img src="/media/not-found" width="0" height="0" alt="A missing image" \
            class="feed-image">',
            html=True,
        )

    def test_rich_text_with_missing_image(self):
        # the page /events/final-event/ has a missing image in the rich text body
        response = self.client.get("/events/final-event/")
        self.assertContains(
            response,
            '<img class="richtext-image full-width" src="/media/not-found" \
            width="0" height="0" alt="where did my image go?">',
            html=True,
        )


class TestFormat(WagtailTestUtils, TestCase):
    def setUp(self):
        # test format
        self.format = Format("test name", "test label", "test is-primary", "original")
        # test image
        self.image = Image.objects.create(
            title="Test image",
            file=get_test_image_file(),
        )

    def test_editor_attributes(self):
        result = self.format.editor_attributes(self.image, "test alt text")
        self.assertEqual(
            result,
            {
                "data-alt": "test alt text",
                "data-embedtype": "image",
                "data-format": "test name",
                "data-id": self.image.pk,
            },
        )

    def test_image_to_editor_html(self):
        result = self.format.image_to_editor_html(self.image, "test alt text")
        self.assertTagInHTML(
            '<img data-embedtype="image" data-id="%d" data-format="test name" '
            'data-alt="test alt text" class="test is-primary" '
            'width="640" height="480" alt="test alt text" >' % self.image.pk,
            result,
            allow_extra_attrs=True,
        )

    def test_image_to_editor_html_with_quoting(self):
        result = self.format.image_to_editor_html(
            self.image, 'Arthur "two sheds" Jackson'
        )
        expected_html = (
            '<img data-embedtype="image" data-id="%d" data-format="test name" '
            'data-alt="Arthur &quot;two sheds&quot; Jackson" class="test is-primary" '
            'width="640" height="480" alt="Arthur &quot;two sheds&quot; Jackson" >'
            % self.image.pk
        )
        self.assertTagInHTML(expected_html, result, allow_extra_attrs=True)

    def test_image_to_html_no_classnames(self):
        self.format.classname = None
        result = self.format.image_to_html(self.image, "test alt text")
        self.assertTagInHTML(
            '<img width="640" height="480" alt="test alt text">',
            result,
            allow_extra_attrs=True,
        )
        self.format.classname = (
            "test is-primary"  # reset to original value for other tests
        )

    def test_image_to_html_with_quoting(self):
        result = self.format.image_to_html(self.image, 'Arthur "two sheds" Jackson')
        self.assertTagInHTML(
            '<img class="test is-primary" width="640" height="480" '
            'alt="Arthur &quot;two sheds&quot; Jackson">',
            result,
            allow_extra_attrs=True,
        )

    def test_get_image_format(self):
        register_image_format(self.format)
        result = get_image_format("test name")
        self.assertEqual(result, self.format)


class TestSignatureGeneration(TestCase):
    def test_signature_generation(self):
        self.assertEqual(
            generate_signature(100, "fill-800x600"), "xnZOzQyUg6pkfciqcfRJRosOrGg="
        )

    def test_signature_verification(self):
        self.assertTrue(
            verify_signature("xnZOzQyUg6pkfciqcfRJRosOrGg=", 100, "fill-800x600")
        )

    def test_signature_changes_on_image_id(self):
        self.assertFalse(
            verify_signature("xnZOzQyUg6pkfciqcfRJRosOrGg=", 200, "fill-800x600")
        )

    def test_signature_changes_on_filter_spec(self):
        self.assertFalse(
            verify_signature("xnZOzQyUg6pkfciqcfRJRosOrGg=", 100, "fill-800x700")
        )


class TestFrontendServeView(TestCase):
    def setUp(self):
        # Create an image for running tests on
        self.image = Image.objects.create(
            title="Test image",
            file=get_test_image_file(),
        )

    def test_get(self):
        """
        Test a valid GET request to the view
        """
        # Generate signature
        signature = generate_signature(self.image.id, "fill-800x600")

        # Get the image
        response = self.client.get(
            reverse(
                "wagtailimages_serve", args=(signature, self.image.id, "fill-800x600")
            )
        )

        # Check response
        self.assertEqual(response.status_code, 200)
        self.assertTrue(response.streaming)
        self.assertEqual(response["Content-Type"], "image/png")
        self.assertEqual(response["Content-Security-Policy"], "default-src 'none'")
        self.assertEqual(response["X-Content-Type-Options"], "nosniff")
        # Ensure the file can actually be read
        image = willow.Image.open(b"".join(response.streaming_content))
        self.assertIsInstance(image, PNGImageFile)

    def test_get_svg(self):
        image = Image.objects.create(title="Test SVG", file=get_test_image_file_svg())

        # Generate signature
        signature = generate_signature(image.id, "fill-800x600")

        # Get the image
        response = self.client.get(
            reverse("wagtailimages_serve", args=(signature, image.id, "fill-800x600"))
        )

        # Check response
        self.assertEqual(response.status_code, 200)
        self.assertTrue(response.streaming)
        self.assertEqual(response["Content-Type"], "image/svg+xml")
        self.assertEqual(response["Content-Security-Policy"], "default-src 'none'")
        self.assertEqual(response["X-Content-Type-Options"], "nosniff")
        # Ensure the file can actually be read
        image = willow.Image.open(BytesIO(b"".join(response.streaming_content)))
        self.assertIsInstance(image, SvgImageFile)

    @override_settings(WAGTAILIMAGES_FORMAT_CONVERSIONS={"avif": "avif"})
    def test_get_avif(self):
        image = Image.objects.create(title="Test AVIF", file=get_test_image_file_avif())

        # Generate signature
        signature = generate_signature(image.id, "fill-800x600")

        # Get the image
        response = self.client.get(
            reverse("wagtailimages_serve", args=(signature, image.id, "fill-800x600"))
        )

        # Check response
        self.assertEqual(response.status_code, 200)
        self.assertTrue(response.streaming)
        self.assertEqual(response["Content-Type"], "image/avif")
        # Ensure the file can actually be read
        image = willow.Image.open(b"".join(response.streaming_content))
        self.assertIsInstance(image, AvifImageFile)

    def test_get_with_extra_component(self):
        """
        Test that a filename can be optionally added to the end of the URL.
        """
        # Generate signature
        signature = generate_signature(self.image.id, "fill-800x600")

        # Get the image
        response = self.client.get(
            reverse(
                "wagtailimages_serve", args=(signature, self.image.id, "fill-800x600")
            )
            + "test.png"
        )

        # Check response
        self.assertEqual(response.status_code, 200)
        self.assertTrue(response.streaming)
        self.assertEqual(response["Content-Type"], "image/png")
        # Ensure the file can actually be read
        image = willow.Image.open(b"".join(response.streaming_content))
        self.assertIsInstance(image, PNGImageFile)

    def test_get_with_too_many_extra_components(self):
        """
        A filename can be appended to the end of the URL, but it must not contain a '/'
        """
        # Generate signature
        signature = generate_signature(self.image.id, "fill-800x600")

        # Get the image
        response = self.client.get(
            reverse(
                "wagtailimages_serve", args=(signature, self.image.id, "fill-800x600")
            )
            + "test/test.png"
        )

        # URL pattern should not match
        self.assertEqual(response.status_code, 404)

    def test_get_with_serve_action(self):
        signature = generate_signature(self.image.id, "fill-800x600")
        response = self.client.get(
            reverse(
                "wagtailimages_serve_action_serve",
                args=(signature, self.image.id, "fill-800x600"),
            )
        )

        self.assertEqual(response.status_code, 200)
        self.assertTrue(response.streaming)
        self.assertEqual(response["Content-Type"], "image/png")
        self.assertEqual(response["Content-Security-Policy"], "default-src 'none'")
        self.assertEqual(response["X-Content-Type-Options"], "nosniff")
        # Ensure the file can actually be read
        image = willow.Image.open(b"".join(response.streaming_content))
        self.assertIsInstance(image, PNGImageFile)

    def test_get_with_redirect_action(self):
        signature = generate_signature(self.image.id, "fill-800x600")
        response = self.client.get(
            reverse(
                "wagtailimages_serve_action_redirect",
                args=(signature, self.image.id, "fill-800x600"),
            )
        )

        expected_redirect_url = (
            "/media/images/{filename[0]}.2e16d0ba.fill-800x600{filename[1]}".format(
                filename=os.path.splitext(os.path.basename(self.image.file.path))
            )
        )

        self.assertRedirects(
            response,
            expected_redirect_url,
            status_code=302,
            fetch_redirect_response=False,
        )

    def test_init_with_unknown_action_raises_error(self):
        with self.assertRaises(ImproperlyConfigured):
            ServeView.as_view(action="unknown")

    def test_get_with_custom_key(self):
        """
        Test that the key can be changed on the view
        """
        # Generate signature
        signature = generate_signature(self.image.id, "fill-800x600", key="custom")

        # Get the image
        response = self.client.get(
            reverse(
                "wagtailimages_serve_custom_key",
                args=(signature, self.image.id, "fill-800x600"),
            )
            + "test.png"
        )

        # Check response
        self.assertEqual(response.status_code, 200)
        # Ensure the file can actually be read
        image = willow.Image.open(b"".join(response.streaming_content))
        self.assertIsInstance(image, PNGImageFile)

    def test_get_with_custom_key_using_default_key(self):
        """
        Test that the key can be changed on the view

        This tests that the default key no longer works when the key is changed on the view
        """
        # Generate signature
        signature = generate_signature(self.image.id, "fill-800x600")

        # Get the image
        response = self.client.get(
            reverse(
                "wagtailimages_serve_custom_key",
                args=(signature, self.image.id, "fill-800x600"),
            )
            + "test.png"
        )

        # Check response
        self.assertEqual(response.status_code, 403)

    def test_get_invalid_signature(self):
        """
        Test that an invalid signature returns a 403 response
        """
        # Generate a signature for the incorrect image id
        signature = generate_signature(self.image.id + 1, "fill-800x600")

        # Get the image
        response = self.client.get(
            reverse(
                "wagtailimages_serve", args=(signature, self.image.id, "fill-800x600")
            )
        )

        # Check response
        self.assertEqual(response.status_code, 403)

    def test_get_invalid_filter_spec(self):
        """
        Test that an invalid filter spec returns a 400 response

        This is very unlikely to happen in reality. A user would have
        to create signature for the invalid filter spec which can't be
        done with Wagtails built in URL generator. We should test it
        anyway though.
        """
        # Generate a signature with the invalid filterspec
        signature = generate_signature(self.image.id, "bad-filter-spec")

        # Get the image
        response = self.client.get(
            reverse(
                "wagtailimages_serve",
                args=(signature, self.image.id, "bad-filter-spec"),
            )
        )

        # Check response
        self.assertEqual(response.status_code, 400)

    def test_get_missing_source_image_file(self):
        """
        Test that a missing image file gives a 410 response

        When the source image file is missing, it is presumed deleted so we
        return a 410 "Gone" response.
        """
        # Delete the image file
        os.remove(self.image.file.path)

        # Get the image
        signature = generate_signature(self.image.id, "fill-800x600")
        response = self.client.get(
            reverse(
                "wagtailimages_serve", args=(signature, self.image.id, "fill-800x600")
            )
        )

        # Check response
        self.assertEqual(response.status_code, 410)

    def test_get_cache_control(self):
        signature = generate_signature(self.image.id, "fill-800x600")
        response = self.client.get(
            reverse(
                "wagtailimages_serve_action_serve",
                args=(signature, self.image.id, "fill-800x600"),
            )
        )
        self.assertEqual(response["Cache-Control"], "max-age=3600, public")


class TestFrontendSendfileView(TestCase):
    def setUp(self):
        self.image = Image.objects.create(
            title="Test image",
            file=get_test_image_file(),
        )

    @override_settings(SENDFILE_BACKEND="sendfile.backends.development")
    @unittest.skipIf(not sendfile_mod, "Missing django-sendfile app.")
    def test_sendfile_nobackend(self):
        signature = generate_signature(self.image.id, "fill-800x600")
        response = self.client.get(
            reverse(
                "wagtailimages_sendfile",
                args=(signature, self.image.id, "fill-800x600"),
            )
        )

        self.assertEqual(response.status_code, 200)
        self.assertEqual(response["Content-Type"], "image/png")
        self.assertEqual(response["Content-Security-Policy"], "default-src 'none'")
        self.assertEqual(response["X-Content-Type-Options"], "nosniff")

    @override_settings(SENDFILE_BACKEND="sendfile.backends.development")
    def test_sendfile_dummy_backend(self):
        signature = generate_signature(self.image.id, "fill-800x600")
        response = self.client.get(
            reverse(
                "wagtailimages_sendfile_dummy",
                args=(signature, self.image.id, "fill-800x600"),
            )
        )

        self.assertEqual(response.status_code, 200)
        self.assertTrue(response.content, msg="Dummy backend response")
        self.assertEqual(response["Content-Security-Policy"], "default-src 'none'")
        self.assertEqual(response["X-Content-Type-Options"], "nosniff")


class TestRect(TestCase):
    def test_init(self):
        rect = Rect(100, 150, 200, 250)
        self.assertEqual(rect.left, 100)
        self.assertEqual(rect.top, 150)
        self.assertEqual(rect.right, 200)
        self.assertEqual(rect.bottom, 250)

    def test_equality(self):
        self.assertEqual(Rect(100, 150, 200, 250), Rect(100, 150, 200, 250))
        self.assertNotEqual(Rect(100, 150, 200, 250), Rect(10, 15, 20, 25))

    def test_getitem(self):
        rect = Rect(100, 150, 200, 250)
        self.assertEqual(rect[0], 100)
        self.assertEqual(rect[1], 150)
        self.assertEqual(rect[2], 200)
        self.assertEqual(rect[3], 250)
        self.assertRaises(IndexError, rect.__getitem__, 4)

    def test_as_tuple(self):
        rect = Rect(100, 150, 200, 250)
        self.assertEqual(rect.as_tuple(), (100, 150, 200, 250))

    def test_size(self):
        rect = Rect(100, 150, 200, 350)
        self.assertIsInstance(rect.size, Vector)
        self.assertEqual(rect.size, (100, 200))
        self.assertEqual(rect.width, 100)
        self.assertEqual(rect.height, 200)

    def test_set_size_with_tuple(self):
        rect = Rect(100, 150, 200, 350)
        rect.size = (200, 400)
        self.assertEqual(rect, (50, 50, 250, 450))

    def test_set_size_with_vector(self):
        rect = Rect(100, 150, 200, 350)
        rect.size = Vector(200, 400)
        self.assertEqual(rect, (50, 50, 250, 450))

    def test_centroid(self):
        rect = Rect(100, 150, 200, 350)
        self.assertIsInstance(rect.centroid, Vector)
        self.assertEqual(rect.centroid, (150, 250))
        self.assertEqual(rect.x, 150)
        self.assertEqual(rect.y, 250)
        self.assertEqual(rect.centroid_x, 150)
        self.assertEqual(rect.centroid_y, 250)

    def test_set_centroid_with_tuple(self):
        rect = Rect(100, 150, 200, 350)
        rect.centroid = (500, 500)
        self.assertEqual(rect, (450, 400, 550, 600))

    def test_set_centroid_with_vector(self):
        rect = Rect(100, 150, 200, 350)
        rect.centroid = Vector(500, 500)
        self.assertEqual(rect, (450, 400, 550, 600))

    def test_repr(self):
        rect = Rect(100, 150, 200, 250)
        self.assertEqual(
            repr(rect), "Rect(left: 100, top: 150, right: 200, bottom: 250)"
        )

    def test_from_point(self):
        rect = Rect.from_point(100, 200, 50, 20)
        self.assertEqual(rect, Rect(75, 190, 125, 210))


class TestGetImageForm(WagtailTestUtils, TestCase):
    def test_fields(self):
        form = get_image_form(Image)

        self.assertEqual(
            list(form.base_fields.keys()),
            [
                "title",
                "file",
                "description",
                "collection",
                "tags",
                "focal_point_x",
                "focal_point_y",
                "focal_point_width",
                "focal_point_height",
            ],
        )

    def test_admin_form_fields_attribute(self):
        form = get_image_form(CustomImage)

        self.assertEqual(
            list(form.base_fields.keys()),
            [
                "title",
                "file",
                "description",
                "collection",
                "tags",
                "focal_point_x",
                "focal_point_y",
                "focal_point_width",
                "focal_point_height",
                "caption",
                "fancy_caption",
            ],
        )

    def test_file_field(self):
        form = get_image_form(WagtailImage)

        self.assertIsInstance(form.base_fields["file"], WagtailImageField)
        self.assertIsInstance(form.base_fields["file"].widget, forms.FileInput)

    def test_tags_field(self):
        form = get_image_form(WagtailImage)

        self.assertIsInstance(form.base_fields["tags"], TagField)
        self.assertIsInstance(form.base_fields["tags"].widget, TagWidget)

    def test_focal_point_fields(self):
        form = get_image_form(WagtailImage)

        self.assertIsInstance(form.base_fields["focal_point_x"], forms.IntegerField)
        self.assertIsInstance(form.base_fields["focal_point_y"], forms.IntegerField)
        self.assertIsInstance(form.base_fields["focal_point_width"], forms.IntegerField)
        self.assertIsInstance(
            form.base_fields["focal_point_height"], forms.IntegerField
        )

        self.assertIsInstance(
            form.base_fields["focal_point_x"].widget, forms.HiddenInput
        )
        self.assertIsInstance(
            form.base_fields["focal_point_y"].widget, forms.HiddenInput
        )
        self.assertIsInstance(
            form.base_fields["focal_point_width"].widget, forms.HiddenInput
        )
        self.assertIsInstance(
            form.base_fields["focal_point_height"].widget, forms.HiddenInput
        )


class TestRenditionFilenames(TestCase):
    # Can't create image in setUp as we need a unique filename for each test.
    # This stops Django appending some rubbish to the filename which makes
    # the assertions difficult.

    def test_normal_filter(self):
        image = Image.objects.create(
            title="Test image",
            file=get_test_image_file(filename="test_rf1.png"),
        )
        rendition = image.get_rendition("width-100")

        self.assertEqual(rendition.file.name, "images/test_rf1.width-100.png")

    def test_fill_filter(self):
        image = Image.objects.create(
            title="Test image",
            file=get_test_image_file(filename="test_rf2.png"),
        )
        rendition = image.get_rendition("fill-100x100")

        self.assertEqual(
            rendition.file.name, "images/test_rf2.2e16d0ba.fill-100x100.png"
        )

    def test_fill_filter_with_focal_point(self):
        image = Image.objects.create(
            title="Test image",
            file=get_test_image_file(filename="test_rf3.png"),
        )
        image.set_focal_point(Rect(100, 100, 200, 200))
        image.save()

        rendition = image.get_rendition("fill-100x100")

        self.assertEqual(
            rendition.file.name, "images/test_rf3.15ee4958.fill-100x100.png"
        )

    def test_filter_with_pipe_gets_dotted(self):
        image = Image.objects.create(
            title="Test image",
            file=get_test_image_file(filename="test_rf4.png"),
        )
        image.set_focal_point(Rect(100, 100, 200, 200))
        image.save()

        rendition = image.get_rendition("fill-200x200|height-150")

        self.assertEqual(
            rendition.file.name, "images/test_rf4.15ee4958.fill-200x200.height-150.png"
        )


class TestDifferentUpload(TestCase):
    def test_upload_path(self):
        image = CustomImageFilePath.objects.create(
            title="Test image",
            description="A test description",
            file=get_test_image_file(),
        )

        second_image = CustomImageFilePath.objects.create(
            title="Test Image",
            description="A test description",
            file=get_test_image_file(colour="black"),
        )

        # The files should be uploaded based on it's content, not just
        # it's filename
        self.assertNotEqual(image.file.url, second_image.file.url)


class TestGetImageModel(WagtailTestUtils, TestCase):
    @override_settings(WAGTAILIMAGES_IMAGE_MODEL="tests.CustomImage")
    def test_custom_get_image_model(self):
        """Test get_image_model with a custom image model"""
        self.assertIs(get_image_model(), CustomImage)

    @override_settings(WAGTAILIMAGES_IMAGE_MODEL="tests.CustomImage")
    def test_custom_get_image_model_string(self):
        """Test get_image_model_string with a custom image model"""
        self.assertEqual(get_image_model_string(), "tests.CustomImage")

    @override_settings()
    def test_standard_get_image_model(self):
        """Test get_image_model with no WAGTAILIMAGES_IMAGE_MODEL"""
        del settings.WAGTAILIMAGES_IMAGE_MODEL
        from wagtail.images.models import Image

        self.assertIs(get_image_model(), Image)

    @override_settings()
    def test_standard_get_image_model_string(self):
        """Test get_image_model_STRING with no WAGTAILIMAGES_IMAGE_MODEL"""
        del settings.WAGTAILIMAGES_IMAGE_MODEL
        self.assertEqual(get_image_model_string(), "wagtailimages.Image")

    @disconnect_signal_receiver(
        signal=setting_changed, receiver=update_permission_policy
    )
    @override_settings(WAGTAILIMAGES_IMAGE_MODEL="tests.UnknownModel")
    def test_unknown_get_image_model(self):
        """Test get_image_model with an unknown model"""
        with self.assertRaises(ImproperlyConfigured):
            get_image_model()

    @disconnect_signal_receiver(
        signal=setting_changed, receiver=update_permission_policy
    )
    @override_settings(WAGTAILIMAGES_IMAGE_MODEL="invalid-string")
    def test_invalid_get_image_model(self):
        """Test get_image_model with an invalid model string"""
        with self.assertRaises(ImproperlyConfigured):
            get_image_model()


class TestWagtailImageField(TestCase):
    @classmethod
    def setUpTestData(cls):
        cls.filename = "wagtailimagefield.png"
        cls.image = get_test_image_file(filename=cls.filename).file
        cls.image_size = cls.image.getbuffer().nbytes

    def test_to_python_with_inmemoryfile(self):
        f = WagtailImageField()
        self.image.seek(0)
        file = InMemoryUploadedFile(
            self.image, "", self.filename, "image/png", self.image_size, None
        )
        to_python = f.to_python(file)
        self.assertIsInstance(to_python.image, WillowImageFile)
        self.assertEqual(to_python.content_type, "image/png")

    def test_to_python_gets_content_type_from_willow(self):
        f = WagtailImageField()
        self.image.seek(0)
        file = InMemoryUploadedFile(
            self.image, "", self.filename, "image/jpeg", self.image_size, None
        )
        to_python = f.to_python(file)
        self.assertIsInstance(to_python.image, WillowImageFile)
        self.assertEqual(to_python.content_type, "image/png")

    def test_to_python_with_temporary_file(self):
        f = WagtailImageField()
        with TemporaryUploadedFile(
            "test_temp.png", "image/png", self.image_size, None
        ) as tmp_file:
            self.image.seek(0)
            tmp_file.write(self.image.read())
            tmp_file.seek(0)

            to_python = f.to_python(tmp_file)
            self.assertIsInstance(to_python.image, WillowImageFile)
            self.assertEqual(to_python.content_type, "image/png")

    def test_to_python_raises_error_with_invalid_image_file(self):
        msg = (
            "Upload a valid image. The file you uploaded was either not an "
            "image or a corrupted image."
        )
        f = WagtailImageField()
        with TemporaryUploadedFile("test_temp.png", "image/png", 32, None) as tmp_file:
            with self.assertRaisesMessage(ValidationError, msg):
                f.to_python(tmp_file)

        with self.assertRaisesMessage(
            ValidationError,
            "No file was submitted. Check the encoding type on the form.",
        ):
            f.to_python(self.image)
