import datetime

from flask_security import RoleMixin, UserMixin
from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

roles_users = db.Table(
    'roles_users',
    db.Column('user_id', db.Integer(), db.ForeignKey('user.id', ondelete='CASCADE')),
    db.Column('role_id', db.Integer(), db.ForeignKey('role.id', ondelete='CASCADE'))
)


class Role(db.Model, RoleMixin):
    __tablename__ = "role"
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80), unique=True)
    description = db.Column(db.String(255))

    def __str__(self):
        return self.name


class Module(db.Model):
    __tablename__ = "module"
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    name = db.Column(db.String(400))
    versions = db.relationship('ModuleVersion', backref='module', lazy=True)


class ModuleVersion(db.Model):
    __tablename__ = "moduleversion"
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    version = db.Column(db.String(10))
    module_id = db.Column(db.Integer, db.ForeignKey('module.id'), nullable=False)


class User(db.Model, UserMixin):
    __tablename__ = "user"
    id = db.Column(db.Integer, primary_key=True)
    date_created = db.Column(db.DateTime, default=datetime.datetime.utcnow)
    username = db.Column(db.String(400))
    email = db.Column(db.String(400), unique=True)
    password = db.Column(db.String(400))
    active = db.Column(db.Boolean)
    roles = db.relationship('Role', secondary=roles_users,
                            backref=db.backref('user', lazy='dynamic'))

    def __repr__(self):
        return str(self.username)

    def __str__(self):
        return str(self.username)