from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

class Invoice(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    number = db.Column(db.String(20), unique=True, nullable=False)  # Número da fatura
    customer = db.Column(db.String(255), nullable=False)  # Nome do cliente
    issue_date = db.Column(db.Date, nullable=False)  # Data de emissão
    due_date = db.Column(db.Date, nullable=False)  # Data de vencimento
    total_amount = db.Column(db.Numeric(10, 2), nullable=False)  # Valor total
    status = db.Column(db.Enum('pending', 'paid', 'canceled', name='status_enum'), default='pending')  # Status da fatura
    created_at = db.Column(db.DateTime, default=db.func.current_timestamp())  # Data de criação
    updated_at = db.Column(db.DateTime, default=db.func.current_timestamp(), onupdate=db.func.current_timestamp())  # Última atualização

    items = db.relationship('InvoiceItem', backref='invoice', lazy=True, cascade="all, delete-orphan")

    def __repr__(self):
        return f"<Invoice {self.number} - {self.customer}>"