from __future__ import annotations

import unittest

from sqlalchemy import create_engine
from sqlalchemy.orm import Session, sessionmaker

from govoplan_core.core.poll import PollOptionUpdateCommand, PollSchedulingProvider
from govoplan_core.db.base import Base
from govoplan_poll.backend.capabilities import SqlPollSchedulingProvider
from govoplan_poll.backend.db.models import Poll, PollOption, PollResponse
from govoplan_poll.backend.schemas import PollAnswerInput, PollCreateRequest, PollOptionInput, PollSubmitResponseRequest
from govoplan_poll.backend.service import create_poll, submit_poll_response


class PollResponseEditingTests(unittest.TestCase):
    def setUp(self) -> None:
        self.engine = create_engine("sqlite:///:memory:")
        Base.metadata.create_all(
            self.engine,
            tables=[Poll.__table__, PollOption.__table__, PollResponse.__table__],
        )
        self.Session = sessionmaker(bind=self.engine)
        self.session: Session = self.Session()

    def tearDown(self) -> None:
        self.session.close()
        Base.metadata.drop_all(
            self.engine,
            tables=[PollResponse.__table__, PollOption.__table__, Poll.__table__],
        )
        self.engine.dispose()

    def _poll(self) -> Poll:
        return create_poll(
            self.session,
            tenant_id="tenant-1",
            user_id="organizer-1",
            payload=PollCreateRequest(
                title="Availability",
                kind="availability",
                status="open",
                min_choices=1,
                max_choices=2,
                options=[
                    PollOptionInput(
                        key="slot-1",
                        label="Monday",
                        value={"slot_id": "slot-1"},
                        metadata={"source": "scheduling"},
                    ),
                    PollOptionInput(
                        key="slot-2",
                        label="Tuesday",
                        value={"slot_id": "slot-2"},
                    ),
                ],
            ),
        )

    def _submit_both(self, poll: Poll, respondent_id: str) -> PollResponse:
        return submit_poll_response(
            self.session,
            tenant_id="tenant-1",
            poll_id=poll.id,
            payload=PollSubmitResponseRequest(
                respondent_id=respondent_id,
                answers=[
                    PollAnswerInput(option_id=poll.options[0].id, value="available"),
                    PollAnswerInput(option_id=poll.options[1].id, value="maybe"),
                ],
            ),
        )

    def test_provider_projects_answers_and_option_change_invalidates_only_that_option(self) -> None:
        poll = self._poll()
        first = self._submit_both(poll, "person-1")
        second = self._submit_both(poll, "person-2")
        provider = SqlPollSchedulingProvider()

        self.assertIsInstance(provider, PollSchedulingProvider)
        projected = provider.list_responses(
            self.session,
            tenant_id="tenant-1",
            poll_id=poll.id,
        )
        self.assertEqual([answer.value for answer in projected[0].answers], ["available", "maybe"])

        option_ref = provider.update_option(
            self.session,
            tenant_id="tenant-1",
            poll_id=poll.id,
            option_id=poll.options[0].id,
            command=PollOptionUpdateCommand(
                label="Monday, revised",
                value={"slot_id": "slot-1"},
                metadata={"source": "scheduling"},
            ),
        )

        self.assertEqual(option_ref.id, poll.options[0].id)
        self.assertEqual(first.answers, [{"option_id": poll.options[1].id, "option_key": "slot-2", "value": "maybe"}])
        self.assertEqual(second.answers, [{"option_id": poll.options[1].id, "option_key": "slot-2", "value": "maybe"}])

        # Re-answer, then replay the exact option snapshot. No response data is
        # invalidated because the option did not actually change.
        first = self._submit_both(poll, "person-1")
        provider.update_option(
            self.session,
            tenant_id="tenant-1",
            poll_id=poll.id,
            option_id=poll.options[0].id,
            command=PollOptionUpdateCommand(
                label="Monday, revised",
                value={"slot_id": "slot-1"},
                metadata={"source": "scheduling"},
            ),
        )
        self.assertEqual(len(first.answers), 2)


if __name__ == "__main__":
    unittest.main()