"""ApiKey model for OpenRouter API Key Monitor.

T08: ApiKey SQLAlchemy model
"""
from datetime import datetime
from sqlalchemy import Column, Integer, String, DateTime, Boolean, ForeignKey
from sqlalchemy.orm import relationship

from openrouter_monitor.database import Base


class ApiKey(Base):
    """API Key model for storing encrypted OpenRouter API keys.
    
    Attributes:
        id: Primary key
        user_id: Foreign key to users table
        name: Human-readable name for the key
        key_encrypted: AES-256 encrypted API key
        is_active: Whether the key is active
        created_at: Timestamp when key was created
        last_used_at: Timestamp when key was last used
        user: Relationship to user
        usage_stats: Relationship to usage statistics
    """
    
    __tablename__ = "api_keys"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
    name = Column(String(100), nullable=False)
    key_encrypted = Column(String, nullable=False)
    is_active = Column(Boolean, default=True, index=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    last_used_at = Column(DateTime, nullable=True)
    
    # Relationships
    user = relationship("User", back_populates="api_keys", lazy="selectin")
    usage_stats = relationship("UsageStats", back_populates="api_key", cascade="all, delete-orphan", lazy="selectin")