from extensions import db
from werkzeug.security import generate_password_hash, check_password_hash

class User(db.Model):
    __tablename__ = "user"

    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    #dados basicos 
    username = db.Column(db.String(80), unique=True, nullable=True)
    admission_date = db.Column(db.Date, nullable=True)
    cargo = db.Column(db.String(80), nullable=True)
    department = db.Column(db.String(80), nullable=True)

    #contato
    email = db.Column(db.String(120), unique=True, nullable=False)
    password = db.Column(db.String(256), nullable=False)
    status = db.Column(db.String(120), nullable=True, default="ativo")
    
    profile_image = db.Column(db.String(255), nullable=True)

    #escala id
    shift_id = db.Column(db.Integer, db.ForeignKey('shift.id'), nullable=True)
    
    created_at = db.Column(db.DateTime, default=db.func.current_timestamp())
    updated_at = db.Column(db.DateTime, default=db.func.current_timestamp(), onupdate=db.func.current_timestamp())
    
    #relacionamento service_instance
    service_instance_id = db.Column(db.Integer, db.ForeignKey('service_instance.id'), nullable=True)

    # Relacionamento hierárquico
    parent_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=True)
    children = db.relationship("User", backref=db.backref('parent', remote_side=[id]), lazy=True)

    # Relacionamento com Contato e Endereço
    contacts = db.relationship('Contact', backref='user', lazy=True, cascade="all, delete-orphan")
    addresses = db.relationship('Address', backref='user', lazy=True, cascade="all, delete-orphan")
    

    # Relacionamento com ServiceRole (papéis do serviço)
    service_roles = db.relationship(
        "UserServiceRole",
        backref="user_service_roles",  # Renomeado para evitar conflito
        lazy="dynamic",
        cascade="all, delete-orphan"
    )

    # Relacionamento com ServiceRolePermission (permite buscar as permissões diretamente)
    permissions = db.relationship(
        "ServiceRolePermission",
        primaryjoin="User.id == ServiceRolePermission.user_id",  # Especificando a condição de junção
        backref="user_permissions",  # Renomeado para evitar conflito
        lazy="dynamic",
        cascade="all, delete-orphan"
    )

    # Relacionamento com Licenças
    licenses = db.relationship(
        "License",
        backref="user_licenses",  # Renomeado para evitar conflito
        lazy="dynamic",
        cascade="all, delete-orphan"
    )

    def __repr__(self):
        return f"<User {self.username}>"

    def set_password(self, password):
        """Gera o hash da senha"""
        self.password = generate_password_hash(password)

    def check_password(self, password):
        """Verifica se a senha é válida"""
        return check_password_hash(self.password, password)

    def has_permission(self, permission_name, service_instance_id=None):
        """Verifica se o usuário tem uma permissão específica."""
        for perm in self.permissions:
            if perm.permission.name == permission_name:
                if service_instance_id is None or perm.service_instance_id == service_instance_id:
                    return True
        return False

    def has_role(self, role_name, service_instance_id=None):
        """Verifica se o usuário possui um papel específico em uma instância."""
        for user_role in self.service_roles:
            if user_role.service_role.name == role_name:
                if service_instance_id is None or user_role.service_instance_id == service_instance_id:
                    return True
        return False

    def has_active_license(self, service_instance_id=None):
        """Verifica se o usuário possui uma licença ativa."""
        for license in self.licenses:
            if license.is_active() and (
                service_instance_id is None or license.service_instance_id == service_instance_id
            ):
                return True
        return False