from flask_sqlalchemy import SQLAlchemy
from flask_bcrypt import Bcrypt
from sqlalchemy import Table, Column, Integer, ForeignKey, String
import uuid

db = SQLAlchemy()
bcrypt = Bcrypt()


user_event_association = Table('user_event', db.Model.metadata,
    Column('user_id', String(36), ForeignKey('user.id')),
    Column('event_id', Integer, ForeignKey('event.id'))
)

class Event(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100), nullable=False)
    description = db.Column(db.String(200), nullable=False)
    location = db.Column(db.String(100), nullable=False)
    deleted = db.Column(db.Boolean, default=False)
    duedate = db.Column(db.DateTime, nullable=False)
    created_at = db.Column(db.DateTime, default=db.func.now())
    user_id = db.Column(db.String(36), db.ForeignKey('user.id'), nullable=False)
    users = db.relationship('User', secondary=user_event_association, back_populates='events')


    def to_dict(self):
        return {
            'id': self.id,
            'title': self.title,
            'description': self.description,
            'location': self.location,
            'duedate': self.duedate.isoformat() if self.duedate else None,
            'created_at': self.created_at.isoformat(),
            'user_id': self.user_id
        }

class User(db.Model):
    id = db.Column(db.String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    name = db.Column(db.String(100), nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    password_hash = db.Column(db.String(128), nullable=False)
    location = db.Column(db.String(100), nullable=False)
    events = db.relationship('Event', secondary=user_event_association, back_populates='users')



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

    def check_password(self, password):
        return bcrypt.check_password_hash(self.password_hash, password)

    def to_dict(self):
        return {
            'id': self.id,
            'name': self.name,
            'email': self.email,
            'location': self.location
        }