import uuid
from datetime import datetime, timezone
from flask_sqlalchemy import SQLAlchemy

# We will import db from extensions, but let's define extensions properly
from app.extensions import db, bcrypt

class User(db.Model):
    __tablename__ = 'users'

    id = db.Column(db.String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    nome = db.Column(db.String(120), nullable=False)
    email = db.Column(db.String(180), unique=True, index=True, nullable=False)
    password_hash = db.Column(db.String(255), nullable=False)
    role = db.Column(db.String(20), nullable=False, default='user')  # 'admin' or 'user'
    ativo = db.Column(db.Boolean, default=True, nullable=False)
    criado_em = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))
    atualizado_em = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))

    # Relationships
    leads_responsaveis = db.relationship('Lead', backref='usuario_responsavel', lazy='dynamic')
    interacoes = db.relationship('LeadInteracao', backref='usuario', lazy='dynamic')

    def set_password(self, password: str):
        self.password_hash = bcrypt.generate_password_hash(password).decode('utf-8')

    def check_password(self, password: str) -> bool:
        return bcrypt.check_password_hash(self.password_hash, password)

    def is_admin(self) -> bool:
        return self.role == 'admin'

    def to_dict(self):
        return {
            'id': self.id,
            'nome': self.nome,
            'email': self.email,
            'role': self.role,
            'ativo': self.ativo,
            'criado_em': self.criado_em.isoformat() if self.criado_em else None,
            'atualizado_em': self.atualizado_em.isoformat() if self.atualizado_em else None
        }

    def __repr__(self):
        return f'<User {self.email} ({self.role})>'