import datetime

from django import forms
from django.test import TestCase
from django.urls import reverse_lazy

from oscar.apps.catalogue.models import Product
from oscar.forms import widgets
from oscar.test.factories import create_product


class ImageInputTestCase(TestCase):
    def test_unbound_context(self):
        i = widgets.ImageInput()
        ctx = i.get_context("test_input", None, {"id": "test-image-id"})
        self.assertEqual(ctx["image_id"], "test-image-id-image")
        self.assertEqual(ctx["image_url"], "")
        self.assertEqual(
            ctx["widget"]["attrs"], {"accept": "image/*", "id": "test-image-id"}
        )

    def test_bound_context(self):
        i = widgets.ImageInput()
        ctx = i.get_context("test_input", "/dummy-image-value", {"id": "test-image-id"})
        self.assertEqual(ctx["image_url"], "/dummy-image-value")


class TimePickerInputTestCase(TestCase):
    def test_div_attrs_context(self):
        i = widgets.TimePickerInput(format="%H:%M")
        ctx = i.get_context("test_input", None, {})
        self.assertEqual(
            ctx["div_attrs"],
            {
                "data-oscarWidget": "time",
                "data-timeFormat": "HH:mm",
            },
        )

    def test_icon_classes_context(self):
        i = widgets.TimePickerInput(format="%H:%M")
        ctx = i.get_context("test_input", None, {})
        self.assertEqual(ctx["icon_classes"], "far fa-clock")

    def test_input_format_unicode(self):
        # Check that the widget can handle unicode formats
        i = widgets.TimePickerInput(format="τ-%H:%M")
        time = datetime.time(10, 47)
        html = i.render("time", time)
        self.assertIn('value="τ-10:47"', html)


class DatePickerInputTestCase(TestCase):
    def test_div_attrs_context(self):
        i = widgets.DatePickerInput(format="%d/%m/%Y")
        ctx = i.get_context("test_input", None, {})
        self.assertEqual(
            ctx["div_attrs"],
            {
                "data-oscarWidget": "date",
                "data-dateFormat": "DD/MM/YYYY",
            },
        )

    def test_icon_classes_context(self):
        i = widgets.DatePickerInput(format="%H:%M")
        ctx = i.get_context("test_input", None, {})
        self.assertEqual(ctx["icon_classes"], "far fa-calendar-alt")

    def test_datepickerinput_format_unicode(self):
        # Check that the widget can handle unicode formats
        i = widgets.DatePickerInput(format="δ-%d/%m/%Y")
        date = datetime.date(2017, 5, 1)
        html = i.render("date", date)
        self.assertIn('value="δ-01/05/2017"', html)


class DateTimePickerInputTestCase(TestCase):
    def test_div_attrs_context(self):
        i = widgets.DateTimePickerInput(format="%d/%m/%Y %H:%M")
        ctx = i.get_context("test_input", None, {})
        self.assertEqual(
            ctx["div_attrs"],
            {
                "data-oscarWidget": "datetime",
                "data-datetimeFormat": "DD/MM/YYYY HH:mm",
            },
        )

    def test_icon_classes_context(self):
        i = widgets.DateTimePickerInput(format="%d/%m/%Y %H:%M")
        ctx = i.get_context("test_input", None, {})
        self.assertEqual(ctx["icon_classes"], "far fa-calendar-alt")

    def test_datetimepickerinput_format_unicode(self):
        # Check that the widget can handle unicode formats
        i = widgets.DateTimePickerInput(format="δ-%d/%m/%Y %H:%M")
        date = datetime.datetime(2017, 5, 1, 10, 57)
        html = i.render("datetime", date)
        self.assertIn('value="δ-01/05/2017 10:57"', html)


class TestWidgetsDatetimeFormat(TestCase):
    def test_datetime_to_date_format_conversion(self):
        format_testcases = (
            ("%Y-%m-%d", "YYYY-MM-DD"),
            ("%Y-%m-%d %H:%M", "YYYY-MM-DD"),
        )
        for format_, expected in format_testcases:
            self.assertEqual(
                widgets.datetime_format_to_js_date_format(format_), expected
            )

    def test_datetime_to_time_format_conversion(self):
        format_testcases = (
            ("%Y-%m-%d %H:%M", "HH:mm"),
            ("%H:%M", "HH:mm"),
        )
        for format_, expected in format_testcases:
            self.assertEqual(
                widgets.datetime_format_to_js_time_format(format_), expected
            )


class AdvancedSelectWidgetTestCase(TestCase):
    def test_widget_disabled_options(self):
        choices = (
            ("red", "Red"),
            ("blue", "Blue"),
            ("green", "Green"),
        )

        disabled_values = ("red", "green")

        i = widgets.AdvancedSelect(choices=choices, disabled_values=disabled_values)
        html = i.render("advselect", [])
        self.assertInHTML('<option value="blue">Blue</option>', html, count=1)
        self.assertInHTML('<option value="red" disabled>Red</option>', html, count=1)
        self.assertInHTML(
            '<option value="green" disabled>Green</option>', html, count=1
        )


class RemoteSelectTestCase(TestCase):
    def setUp(self):
        self.url = reverse_lazy("dashboard:catalogue-product-lookup")

    def _get_form_field(self, **kwargs):
        return forms.ModelChoiceField(
            queryset=Product.objects.all(),
            widget=widgets.RemoteSelect(lookup_url=self.url),
            **kwargs
        )

    def _get_multiselect_form_field(self, **kwargs):
        return forms.ModelChoiceField(
            queryset=Product.objects.all(),
            widget=widgets.MultipleRemoteSelect(lookup_url=self.url),
            **kwargs
        )

    def test_remote_url_required(self):
        with self.assertRaises(ValueError):
            widgets.RemoteSelect()

    def test_select_widget_renders_only_selected_choices(self):
        create_product()
        p2 = create_product()

        field = self._get_form_field()
        form_choices = list(field.widget.options(name="name", value=[p2.pk]))
        # We should only have one choice, not two
        self.assertEqual(len(form_choices), 1)
        self.assertEqual(form_choices[0]["value"], p2.pk)

    def test_widget_attrs(self):
        field = self._get_form_field()
        attrs = field.widget.get_context(name="my_field", value=None, attrs={})[
            "widget"
        ]["attrs"]
        self.assertEqual(attrs["data-multiple"], "")
        self.assertEqual(attrs["data-required"], "required")
        self.assertEqual(attrs["data-ajax-url"], self.url)

    def test_not_required_widget_attrs(self):
        field = self._get_multiselect_form_field(required=False)
        attrs = field.widget.get_context(name="my_field", value=None, attrs={})[
            "widget"
        ]["attrs"]
        self.assertEqual(attrs["data-required"], "")

    def test_multiselect_widget_renders_only_selected_choices(self):
        create_product()
        p2 = create_product()
        p3 = create_product()

        field = self._get_multiselect_form_field()
        form_choices = list(field.widget.options(name="name", value=[p2.pk, p3.pk]))
        # We should only have two choices, not three
        self.assertEqual(len(form_choices), 2)

    def test_multiselect_widget_attrs(self):
        field = self._get_multiselect_form_field()
        attrs = field.widget.get_context(name="my_field", value=None, attrs={})[
            "widget"
        ]["attrs"]
        self.assertEqual(attrs["data-multiple"], "multiple")


class NullBooleanSelectTestCase(TestCase):
    def test_unknown_choice_label(self):
        self.assertEqual(
            dict(widgets.NullBooleanSelect().choices)["unknown"], "---------"
        )