"""Test Pydantic schemas"""
from decimal import Decimal

import pytest
from pydantic import ValidationError

from app.schemas import ProductCreateRequest, ProductResponse


class TestProductCreateRequestSchema:
    """Test ProductCreateRequest schema"""

    @pytest.mark.unit
    def test_valid_product_request(self):
        """Test valid product creation request"""
        data = {
            "name": "Handcrafted Wooden Bowl",
            "description": "A beautiful handcrafted bowl",
            "price": 45.99,
            "stock": 10,
            "image_url": "https://example.com/bowl.jpg",
        }

        product = ProductCreateRequest(**data)
        assert product.name == data["name"]
        assert product.description == data["description"]
        assert product.price == Decimal("45.99")
        assert product.stock == 10
        assert product.image_url == data["image_url"]

    @pytest.mark.unit
    def test_minimal_valid_request(self):
        """Test minimal valid request (only required fields)"""
        data = {"name": "Simple Product", "price": 19.99}

        product = ProductCreateRequest(**data)
        assert product.name == "Simple Product"
        assert product.price == Decimal("19.99")
        assert product.stock == 0
        assert product.description is None
        assert product.image_url is None

    @pytest.mark.unit
    def test_missing_name(self):
        """Test request with missing name"""
        data = {"price": 19.99}

        with pytest.raises(ValidationError) as exc_info:
            ProductCreateRequest(**data)

        errors = exc_info.value.errors()
        assert any(error["loc"] == ("name",) for error in errors)

    @pytest.mark.unit
    def test_missing_price(self):
        """Test request with missing price"""
        data = {"name": "Test Product"}

        with pytest.raises(ValidationError) as exc_info:
            ProductCreateRequest(**data)

        errors = exc_info.value.errors()
        assert any(error["loc"] == ("price",) for error in errors)

    @pytest.mark.unit
    def test_invalid_price_negative(self):
        """Test request with negative price"""
        data = {"name": "Test Product", "price": -10.99}

        with pytest.raises(ValidationError) as exc_info:
            ProductCreateRequest(**data)

        errors = exc_info.value.errors()
        assert any(error["type"] == "greater_than" for error in errors)

    @pytest.mark.unit
    def test_invalid_price_zero(self):
        """Test request with zero price"""
        data = {"name": "Test Product", "price": 0.0}

        with pytest.raises(ValidationError) as exc_info:
            ProductCreateRequest(**data)

        errors = exc_info.value.errors()
        assert any(error["type"] == "greater_than" for error in errors)

    @pytest.mark.unit
    def test_invalid_price_too_many_decimals(self):
        """Test request with too many decimal places"""
        data = {"name": "Test Product", "price": 10.999}

        with pytest.raises(ValidationError) as exc_info:
            ProductCreateRequest(**data)

        errors = exc_info.value.errors()
        assert any("decimal places" in str(error).lower() for error in errors)

    @pytest.mark.unit
    def test_invalid_stock_negative(self):
        """Test request with negative stock"""
        data = {"name": "Test Product", "price": 19.99, "stock": -5}

        with pytest.raises(ValidationError) as exc_info:
            ProductCreateRequest(**data)

        errors = exc_info.value.errors()
        assert any(error["type"] == "greater_than_equal" for error in errors)

    @pytest.mark.unit
    def test_name_too_long(self):
        """Test request with name exceeding max length"""
        data = {"name": "A" * 201, "price": 19.99}  # Exceeds 200 character limit

        with pytest.raises(ValidationError) as exc_info:
            ProductCreateRequest(**data)

        errors = exc_info.value.errors()
        assert any(error["loc"] == ("name",) for error in errors)

    @pytest.mark.unit
    def test_image_url_too_long(self):
        """Test request with image_url exceeding max length"""
        data = {
            "name": "Test Product",
            "price": 19.99,
            "image_url": "A" * 501,  # Exceeds 500 character limit
        }

        with pytest.raises(ValidationError) as exc_info:
            ProductCreateRequest(**data)

        errors = exc_info.value.errors()
        assert any(error["loc"] == ("image_url",) for error in errors)

    @pytest.mark.unit
    def test_price_string_conversion(self):
        """Test price string to Decimal conversion"""
        data = {"name": "Test Product", "price": "29.99"}

        product = ProductCreateRequest(**data)
        assert product.price == Decimal("29.99")

    @pytest.mark.unit
    def test_stock_string_conversion(self):
        """Test stock string to int conversion"""
        data = {"name": "Test Product", "price": 19.99, "stock": "10"}

        product = ProductCreateRequest(**data)
        assert product.stock == 10
        assert isinstance(product.stock, int)


class TestProductResponseSchema:
    """Test ProductResponse schema"""

    @pytest.mark.unit
    def test_valid_product_response(self):
        """Test valid product response"""
        data = {
            "id": 1,
            "name": "Test Product",
            "description": "A test product",
            "price": 45.99,
            "stock": 10,
            "image_url": "https://example.com/product.jpg",
            "is_active": True,
            "created_at": "2024-01-15T10:30:00",
            "updated_at": "2024-01-15T10:30:00",
        }

        product = ProductResponse(**data)
        assert product.id == 1
        assert product.name == "Test Product"
        assert product.price == 45.99
        assert product.stock == 10
        assert product.is_active is True

    @pytest.mark.unit
    def test_product_response_with_none_fields(self):
        """Test product response with optional None fields"""
        data = {
            "id": 1,
            "name": "Test Product",
            "price": 19.99,
            "stock": 0,
            "is_active": True,
        }

        product = ProductResponse(**data)
        assert product.description is None
        assert product.image_url is None
        assert product.created_at is None
        assert product.updated_at is None

    @pytest.mark.unit
    def test_model_validate_from_sqlalchemy(self, db_session):
        """Test validating SQLAlchemy model to Pydantic schema"""
        from app.models import Product

        db_product = Product(
            name="Test Product",
            description="A test product",
            price=Decimal("45.99"),
            stock=10,
        )
        db_session.add(db_product)
        db_session.commit()

        # Validate using model_validate (for SQLAlchemy models)
        response = ProductResponse.model_validate(db_product)
        assert response.name == "Test Product"
        assert response.price == 45.99
        assert response.stock == 10

    @pytest.mark.unit
    def test_model_dump(self):
        """Test model_dump method"""
        data = {
            "id": 1,
            "name": "Test Product",
            "price": 19.99,
            "stock": 5,
            "is_active": True,
        }

        product = ProductResponse(**data)
        dumped = product.model_dump()

        assert isinstance(dumped, dict)
        assert dumped["id"] == 1
        assert dumped["name"] == "Test Product"
        assert dumped["price"] == 19.99

    @pytest.mark.unit
    def test_model_dump_json(self):
        """Test model_dump_json method"""
        data = {
            "id": 1,
            "name": "Test Product",
            "price": 19.99,
            "stock": 5,
            "is_active": True,
        }

        product = ProductResponse(**data)
        json_str = product.model_dump_json()

        assert isinstance(json_str, str)
        assert "Test Product" in json_str