"""
NasaCache ORM model - NASA Horizons API cache
"""
from sqlalchemy import Column, String, TIMESTAMP, CheckConstraint, Index
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.sql import func
from app.database import Base


class NasaCache(Base):
    """NASA Horizons API response cache"""

    __tablename__ = "nasa_cache"

    cache_key = Column(
        String(500),
        primary_key=True,
        comment="Cache key: {body_id}:{start}:{end}:{step}",
    )
    body_id = Column(String(50), nullable=True, comment="Body ID")
    start_time = Column(TIMESTAMP, nullable=True, comment="Query start time")
    end_time = Column(TIMESTAMP, nullable=True, comment="Query end time")
    step = Column(String(10), nullable=True, comment="Time step (e.g., '1d')")
    data = Column(JSONB, nullable=False, comment="Complete API response (JSON)")
    expires_at = Column(
        TIMESTAMP, nullable=False, comment="Cache expiration time"
    )
    created_at = Column(TIMESTAMP, server_default=func.now())

    # Constraints and indexes
    __table_args__ = (
        CheckConstraint(
            "end_time >= start_time",
            name="chk_time_range",
        ),
        Index("idx_nasa_cache_body_id", "body_id"),
        Index("idx_nasa_cache_expires", "expires_at"),
        Index("idx_nasa_cache_time_range", "body_id", "start_time", "end_time"),
    )

    def __repr__(self):
        return f"<NasaCache(cache_key='{self.cache_key}', body_id='{self.body_id}', expires_at='{self.expires_at}')>"