from django.core.exceptions import ValidationError
from django.db.utils import IntegrityError
from django.test import TestCase

from apps.dashboard.models import Item, Note
from apps.lyric.models import User


class ItemModelTest(TestCase):
    def test_item_is_related_to_note(self):
        mynote = Note.objects.create()
        item = Item()
        item.note = mynote
        item.save()
        self.assertIn(item, mynote.item_set.all())

    def test_cannot_save_null_note_items(self):
        mynote = Note.objects.create()
        item = Item(note=mynote, text=None)
        with self.assertRaises(IntegrityError):
            item.save()

    def test_cannot_save_empty_note_items(self):
        mynote = Note.objects.create()
        item = Item(note=mynote, text="")
        with self.assertRaises(ValidationError):
            item.full_clean()

    def test_duplicate_items_are_invalid(self):
        mynote = Note.objects.create()
        Item.objects.create(note=mynote, text="jklol")
        with self.assertRaises(ValidationError):
            item = Item(note=mynote, text="jklol")
            item.full_clean()

    def test_still_can_save_same_item_to_different_notes(self):
        note1 = Note.objects.create()
        note2 = Note.objects.create()
        Item.objects.create(note=note1, text="nojk")
        item = Item(note=note2, text="nojk")
        item.full_clean() # should not raise

class NoteModelTest(TestCase):
        def test_get_absolute_url(self):
            mynote = Note.objects.create()
            self.assertEqual(mynote.get_absolute_url(), f"/dashboard/note/{mynote.id}/")

        def test_note_items_order(self):
            note1 = Note.objects.create()
            item1 = Item.objects.create(note=note1, text="i1")
            item2 = Item.objects.create(note=note1, text="item 2")
            item3 = Item.objects.create(note=note1, text="3")
            self.assertEqual(
                list(note1.item_set.all()),
                [item1, item2, item3],
            )

        def test_notes_can_have_owners(self):
            user = User.objects.create(email="a@b.cde")
            mynote = Note.objects.create(owner=user)
            self.assertIn(mynote, user.notes.all())

        def test_note_owner_is_optional(self):
            Note.objects.create()

        def test_note_name_is_first_item_text(self):
            note = Note.objects.create()
            Item.objects.create(note=note, text="first item")
            Item.objects.create(note=note, text="second item")
            self.assertEqual(note.name, "first item")