"""Unit tests for loyalty schemas."""

from datetime import UTC, datetime

import pytest
from pydantic import ValidationError

from app.modules.loyalty.schemas.card import (
    CardEnrollRequest,
    TransactionResponse,
)
from app.modules.loyalty.schemas.points import PointsAdjustRequest
from app.modules.loyalty.schemas.program import StorefrontProgramResponse


@pytest.mark.unit
@pytest.mark.loyalty
class TestCardEnrollRequest:
    """Tests for enrollment request schema validation."""

    def test_valid_with_email(self):
        """Email-only enrollment is valid."""
        req = CardEnrollRequest(email="test@example.com")
        assert req.email == "test@example.com"
        assert req.customer_id is None

    def test_valid_with_customer_id(self):
        """Customer ID enrollment is valid."""
        req = CardEnrollRequest(customer_id=42)
        assert req.customer_id == 42
        assert req.email is None

    def test_self_enrollment_fields(self):
        """Self-enrollment accepts name, phone, birthday."""
        from datetime import date

        req = CardEnrollRequest(
            email="self@example.com",
            customer_name="Jane Doe",
            customer_phone="+352123456",
            customer_birthday="1990-01-15",
        )
        assert req.customer_name == "Jane Doe"
        assert req.customer_phone == "+352123456"
        assert req.customer_birthday == date(1990, 1, 15)

    def test_birthday_in_future_rejected(self):
        """Future birthdays are rejected."""
        from datetime import date, timedelta

        import pytest
        from pydantic import ValidationError

        with pytest.raises(ValidationError, match="must be in the past"):
            CardEnrollRequest(
                email="self@example.com",
                customer_birthday=(date.today() + timedelta(days=1)).isoformat(),
            )

    def test_birthday_implausible_age_rejected(self):
        """Birthdays implying impossible ages are rejected."""
        import pytest
        from pydantic import ValidationError

        with pytest.raises(ValidationError, match="implausible age"):
            CardEnrollRequest(
                email="self@example.com",
                customer_birthday="1800-01-01",
            )

    def test_birthday_omitted_is_valid(self):
        """Birthday is optional."""
        req = CardEnrollRequest(email="self@example.com")
        assert req.customer_birthday is None


@pytest.mark.unit
@pytest.mark.loyalty
class TestTransactionResponse:
    """Tests for transaction response schema."""

    def test_customer_name_field_defaults_none(self):
        """customer_name field exists and defaults to None."""
        now = datetime.now(UTC)
        tx = TransactionResponse(
            id=1,
            card_id=1,
            transaction_type="points_earned",
            stamps_delta=0,
            points_delta=50,
            transaction_at=now,
            created_at=now,
        )
        assert tx.customer_name is None

    def test_customer_name_can_be_set(self):
        """customer_name can be explicitly set."""
        now = datetime.now(UTC)
        tx = TransactionResponse(
            id=1,
            card_id=1,
            transaction_type="card_created",
            stamps_delta=0,
            points_delta=0,
            customer_name="John Doe",
            transaction_at=now,
            created_at=now,
        )
        assert tx.customer_name == "John Doe"


# ============================================================================
# Item 8: PointsAdjustRequest bounds
# ============================================================================


@pytest.mark.unit
@pytest.mark.loyalty
class TestPointsAdjustRequestBounds:
    """Tests for PointsAdjustRequest.points_delta bounds."""

    def test_valid_positive_delta(self):
        """Positive delta within bounds is valid."""
        req = PointsAdjustRequest(points_delta=100, reason="Bonus for customer")
        assert req.points_delta == 100

    def test_valid_negative_delta(self):
        """Negative delta within bounds is valid."""
        req = PointsAdjustRequest(points_delta=-500, reason="Correction needed")
        assert req.points_delta == -500

    def test_max_boundary(self):
        """Delta at max boundary (100000) is valid."""
        req = PointsAdjustRequest(points_delta=100000, reason="Max allowed delta")
        assert req.points_delta == 100000

    def test_min_boundary(self):
        """Delta at min boundary (-100000) is valid."""
        req = PointsAdjustRequest(points_delta=-100000, reason="Min allowed delta")
        assert req.points_delta == -100000

    def test_exceeds_max_rejected(self):
        """Delta exceeding 100000 is rejected."""
        with pytest.raises(ValidationError):
            PointsAdjustRequest(points_delta=100001, reason="Too many points")

    def test_exceeds_min_rejected(self):
        """Delta below -100000 is rejected."""
        with pytest.raises(ValidationError):
            PointsAdjustRequest(points_delta=-100001, reason="Too many negative")


# ============================================================================
# Item 7: StorefrontProgramResponse excludes wallet fields
# ============================================================================


@pytest.mark.unit
@pytest.mark.loyalty
class TestStorefrontProgramResponse:
    """Tests for StorefrontProgramResponse excluding wallet IDs."""

    def test_wallet_fields_excluded_from_serialization(self):
        """Wallet integration IDs are excluded from JSON output."""
        now = datetime.now(UTC)
        response = StorefrontProgramResponse(
            id=1,
            merchant_id=1,
            loyalty_type="points",
            stamps_target=10,
            stamps_reward_description="Free item",
            points_per_euro=10,
            cooldown_minutes=15,
            max_daily_stamps=5,
            require_staff_pin=True,
            card_color="#4F46E5",
            is_active=True,
            created_at=now,
            updated_at=now,
        )

        data = response.model_dump()
        assert "google_issuer_id" not in data
        assert "google_class_id" not in data
        assert "apple_pass_type_id" not in data

    def test_non_wallet_fields_present(self):
        """Non-wallet fields are still present."""
        now = datetime.now(UTC)
        response = StorefrontProgramResponse(
            id=1,
            merchant_id=1,
            loyalty_type="points",
            stamps_target=10,
            stamps_reward_description="Free item",
            points_per_euro=10,
            cooldown_minutes=15,
            max_daily_stamps=5,
            require_staff_pin=True,
            card_color="#4F46E5",
            is_active=True,
            created_at=now,
            updated_at=now,
        )

        data = response.model_dump()
        assert data["id"] == 1
        assert data["loyalty_type"] == "points"
        assert data["points_per_euro"] == 10
        assert data["card_color"] == "#4F46E5"