from datetime import timedelta
from django.db.models import Q
from django.test import TestCase
from django.urls import reverse
from django.utils import timezone

from apps.lyric.models import Token, User
from apps.epic.models import GateSlot, Room, RoomInvite, debit_token, select_token


class RoomCreationTest(TestCase):
    def test_creating_a_room_generates_six_gate_slots(self):
        owner = User.objects.create(email="founder@example.com")
        room = Room.objects.create(name="Test Room", owner=owner)
        self.assertEqual(GateSlot.objects.filter(room=room).count(), 6)


class DebitTokenTest(TestCase):
    def setUp(self):
        self.owner = User.objects.create(email="founder@example.com")
        self.room = Room.objects.create(
            name="Test Room",
            owner=self.owner,
            renewal_period=timedelta(days=7)
        )
        self.slot = self.room.gate_slots.get(slot_number=1)

    def test_debit_free_token_consumes_token_and_fills_slot(self):
        free_token = Token.objects.get(user=self.owner, token_type=Token.FREE)
        debit_token(self.owner, self.slot, free_token)
        self.assertFalse(Token.objects.filter(pk=free_token.pk).exists())
        self.slot.refresh_from_db()
        self.assertEqual(self.slot.status, GateSlot.FILLED)
        self.assertEqual(self.slot.gamer, self.owner)

    def test_debit_coin_does_not_consume_token(self):
        coin_token = Token.objects.get(user=self.owner, token_type=Token.COIN)
        debit_token(self.owner, self.slot, coin_token)
        self.assertTrue(Token.objects.filter(pk=coin_token.pk).exists())
        self.slot.refresh_from_db()
        self.assertEqual(self.slot.status, GateSlot.FILLED)
        self.assertEqual(self.slot.gamer, self.owner)

    def test_debit_fills_last_slot_and_opens_gate(self):
        for i in range(2, 7):
            gamer = User.objects.create(email=f"g{i}@test.io")
            slot = self.room.gate_slots.get(slot_number=i)
            slot.gamer = gamer
            slot.status = GateSlot.FILLED
            slot.save()
        free_token = Token.objects.get(user=self.owner, token_type=Token.FREE)
        debit_token(self.owner, self.slot, free_token)
        self.room.refresh_from_db()
        self.assertEqual(self.room.gate_status, Room.OPEN)


class CoinTokenInUseTest(TestCase):
    def setUp(self):
        self.owner = User.objects.create(email="founder@example.com")
        self.room = Room.objects.create(
            name="Dragon's Den",
            owner=self.owner,
            renewal_period=timedelta(days=7),
        )
        self.slot = self.room.gate_slots.get(slot_number=1)
        self.coin = Token.objects.get(user=self.owner, token_type=Token.COIN)
        debit_token(self.owner, self.slot, self.coin)
        self.coin.refresh_from_db()

    def test_coin_tooltip_expiry_shows_next_ready_date(self):
        expected_date = self.coin.next_ready_at.strftime("%Y-%m-%d")
        self.assertIn(expected_date, self.coin.tooltip_expiry())

    def test_coin_tooltip_room_html_contains_anchor(self):
        room_url = reverse("epic:gatekeeper", kwargs={"room_id": self.room.id})
        html = self.coin.tooltip_room_html()
        self.assertIn(f'href="{room_url}"', html)
        self.assertIn(self.room.name, html)


class SelectTokenTest(TestCase):
    def setUp(self):
        self.user = User.objects.create(email="gamer@test.io")
        self.other_room = Room.objects.create(name="Other Room", owner=self.user)
        self.coin = Token.objects.get(user=self.user, token_type=Token.COIN)

    def test_returns_coin_when_available(self):
        token = select_token(self.user)
        self.assertEqual(token.token_type, Token.COIN)

    def test_returns_free_token_when_coin_in_use(self):
        self.coin.current_room = self.other_room
        self.coin.save()
        token = select_token(self.user)
        self.assertEqual(token.token_type, Token.FREE)

    def test_free_token_selection_is_fefo(self):
        self.coin.current_room = self.other_room
        self.coin.save()
        Token.objects.filter(user=self.user, token_type=Token.FREE).delete()
        soon = Token.objects.create(
            user=self.user, token_type=Token.FREE,
            expires_at=timezone.now() + timedelta(days=2),
        )
        Token.objects.create(
            user=self.user, token_type=Token.FREE,
            expires_at=timezone.now() + timedelta(days=6),
        )
        token = select_token(self.user)
        self.assertEqual(token.pk, soon.pk)

    def test_returns_tithe_when_coin_in_use_and_no_free_tokens(self):
        self.coin.current_room = self.other_room
        self.coin.save()
        Token.objects.filter(user=self.user, token_type=Token.FREE).delete()
        tithe = Token.objects.create(user=self.user, token_type=Token.TITHE)
        token = select_token(self.user)
        self.assertEqual(token.pk, tithe.pk)

    def test_returns_none_when_all_depleted(self):
        self.coin.current_room = self.other_room
        self.coin.save()
        Token.objects.filter(user=self.user, token_type=Token.FREE).delete()
        token = select_token(self.user)
        self.assertIsNone(token)

    def test_returns_pass_for_staff(self):
        self.user.is_staff = True
        self.user.save()
        pass_token = Token.objects.create(user=self.user, token_type=Token.PASS)
        token = select_token(self.user)
        self.assertEqual(token.token_type, Token.PASS)


class RoomInviteTest(TestCase):
    def setUp(self):
        self.founder = User.objects.create(email="founder@example.com")
        self.room = Room.objects.create(name="Dragon's Den", owner=self.founder)

    def test_founder_can_invite_by_email(self):
        invite = RoomInvite.objects.create(
            room=self.room,
            inviter=self.founder,
            invitee_email="friend@example.com",
        )
        self.assertEqual(invite.status, RoomInvite.PENDING)

    def test_invited_room_appears_in_my_games_queryset(self):
        friend = User.objects.create(email="friend@example.com")
        RoomInvite.objects.create(
            room=self.room,
            inviter=self.founder,
            invitee_email=friend.email,
        )
        rooms = Room.objects.filter(
            Q(owner=friend) |
            Q(gate_slots__gamer=friend) |
            Q(invites__invitee_email=friend.email, invites__status=RoomInvite.PENDING)
        ).distinct()
        self.assertIn(self.room, rooms)