# app/models/device_registration.py
# -----------------------------------
# Tracks iOS devices that have registered with the server.
# One row per physical device — upserted on every app foreground.

from app import db
from app.utils.time_utils import now_eastern


class DeviceRegistration(db.Model):
    __tablename__ = 'device_registrations'

    id            = db.Column(db.Integer,     primary_key=True)
    # Stable UUID generated on first launch and stored in iOS Keychain.
    # Unique across all devices; survives app restarts but not device wipes.
    device_id     = db.Column(db.String(64),  nullable=False, unique=True, index=True)
    user_id       = db.Column(db.Integer,     db.ForeignKey('users.id'), nullable=False, index=True)
    device_name   = db.Column(db.String(255), nullable=False, default='')
    app_version   = db.Column(db.String(32),  nullable=False, default='')
    ios_version   = db.Column(db.String(32),  nullable=False, default='')
    registered_at = db.Column(db.DateTime,    nullable=False, default=now_eastern)
    last_seen_at  = db.Column(db.DateTime,    nullable=False, default=now_eastern)

    user = db.relationship('User', backref=db.backref('devices', lazy='dynamic'))