from sqlalchemy import Column, String, Integer, Float, DateTime
from sqlalchemy.sql import func
from app.api.db.base_class import Base
import uuid

class SeaLion(Base):
    __tablename__ = "sea_lions"

    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    name = Column(String, nullable=False)
    species = Column(String, nullable=False)
    age = Column(Integer)
    weight = Column(Float)
    location = Column(String, index=True)

    # Timestamps
    created_at = Column(DateTime, default=func.now())
    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
```

This SQLAlchemy model defines a `SeaLion` class that extends the `Base` class. It includes the following columns:

- `id`: A primary key column of type `String` that uses a UUID as the default value.
- `name`: A required `String` column for the sea lion's name.
- `species`: A required `String` column for the sea lion's species.
- `age`: An optional `Integer` column for the sea lion's age.
- `weight`: An optional `Float` column for the sea lion's weight.
- `location`: A `String` column for the sea lion's location, indexed for faster queries.
- `created_at`: A `DateTime` column that stores the record's creation timestamp, with a default value of the current time.
- `updated_at`: A `DateTime` column that stores the record's last update timestamp, with a default value of the current time and an `onupdate` trigger to update the value on each record modification.

This model can be used with FastAPI and Alembic migrations to manage sea lion data in a database.