"""
PostgreSQL storage backend for ToDoWrite.

PostgreSQL implementation using SQLAlchemy for Rails ActiveRecord compatibility.
"""

from typing import Any

from .backends import StorageBackend


class PostgreSQLBackend(StorageBackend):
    """PostgreSQL storage backend implementation."""

    def __init__(
        self, database_url: str, pool_size: int = 5, max_overflow: int = 10
    ) -> None:
        self.database_url = database_url
        self.pool_size = pool_size
        self.max_overflow = max_overflow
        self.backend_name = "postgresql"
        self._engine = None
        self._session = None

    def connect(self) -> None:
        """Establish PostgreSQL connection."""
        # Placeholder implementation for Rails ActiveRecord compatibility
        pass

    def disconnect(self) -> None:
        """Close PostgreSQL connection."""
        # Placeholder implementation for Rails ActiveRecord compatibility
        pass

    def save_record(self, record: Any) -> Any:
        """Save a record to PostgreSQL."""
        # Placeholder implementation for Rails ActiveRecord compatibility
        return record

    def get_record(self, model_class: type, record_id: int) -> Any | None:
        """Get a record by ID from PostgreSQL."""
        # Placeholder implementation for Rails ActiveRecord compatibility
        return None

    def delete_record(self, record: Any) -> bool:
        """Delete a record from PostgreSQL."""
        # Placeholder implementation for Rails ActiveRecord compatibility
        return True
