from app import db
from datetime import datetime

class Career(db.Model):
    __tablename__ = 'careers'
    
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(150), unique=True, nullable=False, index=True)
    code = db.Column(db.String(50), nullable=True)
    description = db.Column(db.Text, nullable=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    
    # Relationships
    subjects = db.relationship('Subject', backref='career_obj', lazy=True)
    
    def to_dict(self):
        return {
            'id': self.id,
            'name': self.name,
            'code': self.code,
            'description': self.description,
            'subjects_count': len(self.subjects) if self.subjects else 0,
            'created_at': self.created_at.isoformat() if self.created_at else None
        }
    
    def __repr__(self):
        return f'<Career {self.name}>'