"""Tests for database concepts (simplified)."""

import pytest


class TestDatabaseConcepts:
    """Test database-related concepts without requiring full database setup."""

    def test_database_url_parsing(self):
        """Test database URL parsing."""
        # Test various database URL formats
        test_cases = [
            ("postgresql://user:pass@localhost:5432/db", True),
            ("sqlite:///test.db", True),
            ("postgresql+asyncpg://user:pass@localhost:5432/db", True),
            ("invalid-url", False),
        ]

        for url, should_parse in test_cases:
            if should_parse:
                # Just verify URL can be parsed
                assert "://" in url
            else:
                # Invalid URLs should not have valid structure
                if "://" in url:
                    pass  # Some invalid URLs might still contain ://

    def test_connection_pool_concepts(self):
        """Test connection pool configuration concepts."""
        # Pool size should be positive
        pool_size = 20
        max_overflow = 30
        pool_timeout = 30
        pool_recycle = 3600

        assert pool_size > 0
        assert max_overflow >= 0
        assert pool_timeout > 0
        assert pool_recycle > 0

    def test_session_factory_concepts(self):
        """Test session factory concepts."""
        # Session configuration
        expire_on_commit = False
        autocommit = False
        autoflush = False

        assert isinstance(expire_on_commit, bool)
        assert isinstance(autocommit, bool)
        assert isinstance(autoflush, bool)


class TestSQLAlchemyTypes:
    """Test SQLAlchemy type concepts."""

    def test_column_types(self):
        """Test column type concepts."""
        from sqlalchemy import String, Integer, Boolean, DateTime
        from sqlalchemy.dialects.postgresql import UUID, JSONB

        # Verify types exist and can be instantiated
        str_type = String(255)
        int_type = Integer()
        bool_type = Boolean()
        dt_type = DateTime()

        assert str_type is not None
        assert int_type is not None
        assert bool_type is not None
        assert dt_type is not None

    def test_orm_relationships(self):
        """Test ORM relationship concepts."""
        from sqlalchemy.orm import relationship, backref
        from sqlalchemy import ForeignKey
        from sqlalchemy import Column, Integer, String

        # Create mock models for testing
        class User:
            id = Column(Integer, primary_key=True)
            name = Column(String(255))

        class Post:
            id = Column(Integer, primary_key=True)
            user_id = Column(Integer, ForeignKey("users.id"))
            title = Column(String(255))

        assert hasattr(User, "id")
        assert hasattr(Post, "id")