from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, JSON, Date, Text
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from sqlalchemy.dialects.postgresql import UUID as PG_UUID
from app.db.base_class import Base

class VehicleOwnership(Base):
    __tablename__ = "vehicle_ownerships"
    __table_args__ = {"schema": "data"}
    id = Column(Integer, primary_key=True, index=True)
    vehicle_id = Column(PG_UUID(as_uuid=True), ForeignKey("data.assets.id"), nullable=False)
    user_id = Column(Integer, ForeignKey("data.users.id"), nullable=False)
    start_date = Column(Date, nullable=False, default=func.current_date())
    end_date = Column(Date, nullable=True)
    notes = Column(Text, nullable=True)

    vehicle = relationship("Asset", back_populates="ownership_history")
    user = relationship("User", back_populates="ownership_history")

class AuditLog(Base):
    __tablename__ = "audit_logs"
    __table_args__ = {"schema": "data"}
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("data.users.id"), nullable=True) 
    target_type = Column(String, index=True) 
    target_id = Column(String, index=True)
    action = Column(String, nullable=False) 
    changes = Column(JSON, nullable=True)
    timestamp = Column(DateTime(timezone=True), server_default=func.now())
    user = relationship("User")