from django.core.exceptions import ValidationError
from django.forms import MultipleChoiceField
from django.test import SimpleTestCase


class MultipleChoiceFieldTest(SimpleTestCase):
    def test_multiplechoicefield_1(self):
        f = MultipleChoiceField(choices=[("1", "One"), ("2", "Two")])
        with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
            f.clean("")
        with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
            f.clean(None)
        self.assertEqual(["1"], f.clean([1]))
        self.assertEqual(["1"], f.clean(["1"]))
        self.assertEqual(["1", "2"], f.clean(["1", "2"]))
        self.assertEqual(["1", "2"], f.clean([1, "2"]))
        self.assertEqual(["1", "2"], f.clean((1, "2")))
        with self.assertRaisesMessage(ValidationError, "'Enter a list of values.'"):
            f.clean("hello")
        with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
            f.clean([])
        with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
            f.clean(())
        msg = "'Select a valid choice. 3 is not one of the available choices.'"
        with self.assertRaisesMessage(ValidationError, msg):
            f.clean(["3"])

    def test_multiplechoicefield_2(self):
        f = MultipleChoiceField(choices=[("1", "One"), ("2", "Two")], required=False)
        self.assertEqual([], f.clean(""))
        self.assertEqual([], f.clean(None))
        self.assertEqual(["1"], f.clean([1]))
        self.assertEqual(["1"], f.clean(["1"]))
        self.assertEqual(["1", "2"], f.clean(["1", "2"]))
        self.assertEqual(["1", "2"], f.clean([1, "2"]))
        self.assertEqual(["1", "2"], f.clean((1, "2")))
        with self.assertRaisesMessage(ValidationError, "'Enter a list of values.'"):
            f.clean("hello")
        self.assertEqual([], f.clean([]))
        self.assertEqual([], f.clean(()))
        msg = "'Select a valid choice. 3 is not one of the available choices.'"
        with self.assertRaisesMessage(ValidationError, msg):
            f.clean(["3"])

    def test_multiplechoicefield_3(self):
        f = MultipleChoiceField(
            choices=[
                ("Numbers", (("1", "One"), ("2", "Two"))),
                ("Letters", (("3", "A"), ("4", "B"))),
                ("5", "Other"),
            ]
        )
        self.assertEqual(["1"], f.clean([1]))
        self.assertEqual(["1"], f.clean(["1"]))
        self.assertEqual(["1", "5"], f.clean([1, 5]))
        self.assertEqual(["1", "5"], f.clean([1, "5"]))
        self.assertEqual(["1", "5"], f.clean(["1", 5]))
        self.assertEqual(["1", "5"], f.clean(["1", "5"]))
        msg = "'Select a valid choice. 6 is not one of the available choices.'"
        with self.assertRaisesMessage(ValidationError, msg):
            f.clean(["6"])
        msg = "'Select a valid choice. 6 is not one of the available choices.'"
        with self.assertRaisesMessage(ValidationError, msg):
            f.clean(["1", "6"])

    def test_multiplechoicefield_changed(self):
        f = MultipleChoiceField(choices=[("1", "One"), ("2", "Two"), ("3", "Three")])
        self.assertFalse(f.has_changed(None, None))
        self.assertFalse(f.has_changed([], None))
        self.assertTrue(f.has_changed(None, ["1"]))
        self.assertFalse(f.has_changed([1, 2], ["1", "2"]))
        self.assertFalse(f.has_changed([2, 1], ["1", "2"]))
        self.assertTrue(f.has_changed([1, 2], ["1"]))
        self.assertTrue(f.has_changed([1, 2], ["1", "3"]))

    def test_disabled_has_changed(self):
        f = MultipleChoiceField(choices=[("1", "One"), ("2", "Two")], disabled=True)
        self.assertIs(f.has_changed("x", "y"), False)