"""Unit tests for decision_service."""
from unittest.mock import MagicMock
import pytest

from models.decision import ListingDecision
from services import decision_service


class TestSetDecision:
    def test_set_liked(self) -> None:
        repo = MagicMock()
        repo.upsert_decision.return_value = ListingDecision(
            id=1, user_id=1, listing_id=100, listing_type="RENT", decision="liked"
        )
        result = decision_service.set_decision(
            repo, user_id=1, listing_id=100,
            listing_type="RENT", decision="liked",
        )
        assert result.decision == "liked"
        repo.upsert_decision.assert_called_once_with(
            1, 100, "RENT", "liked"
        )

    def test_set_disliked(self) -> None:
        repo = MagicMock()
        repo.upsert_decision.return_value = ListingDecision(
            id=1, user_id=1, listing_id=100, listing_type="RENT", decision="disliked"
        )
        result = decision_service.set_decision(
            repo, user_id=1, listing_id=100,
            listing_type="RENT", decision="disliked",
        )
        assert result.decision == "disliked"

    def test_invalid_decision_raises(self) -> None:
        repo = MagicMock()
        with pytest.raises(ValueError, match="Invalid decision"):
            decision_service.set_decision(
                repo, user_id=1, listing_id=100,
                listing_type="RENT", decision="maybe",
            )

    def test_invalid_listing_type_raises(self) -> None:
        repo = MagicMock()
        with pytest.raises(ValueError, match="Invalid listing_type"):
            decision_service.set_decision(
                repo, user_id=1, listing_id=100,
                listing_type="SELL", decision="liked",
            )


class TestGetDecisions:
    def test_returns_all_decisions(self) -> None:
        repo = MagicMock()
        repo.get_decisions_for_user.return_value = [
            ListingDecision(
                id=1, user_id=1, listing_id=100,
                listing_type="RENT", decision="liked",
            ),
        ]
        result = decision_service.get_user_decisions(repo, user_id=1)
        assert len(result) == 1


class TestClearDecision:
    def test_clear_existing(self) -> None:
        repo = MagicMock()
        repo.delete_decision.return_value = True
        result = decision_service.remove_decision(
            repo, user_id=1, listing_id=100, listing_type="RENT"
        )
        assert result is True

    def test_clear_nonexistent(self) -> None:
        repo = MagicMock()
        repo.delete_decision.return_value = False
        result = decision_service.remove_decision(
            repo, user_id=1, listing_id=100, listing_type="RENT"
        )
        assert result is False


class TestGetDislikedListingIds:
    def test_returns_disliked_set(self) -> None:
        repo = MagicMock()
        repo.get_disliked_listing_ids.return_value = {200, 300}
        result = decision_service.get_disliked_ids(
            repo, user_id=1, listing_type="RENT"
        )
        assert result == {200, 300}