# app/models/broadcast.py
# -----------------------
# Stores admin-sent broadcast notification records.
# Each broadcast creates one Notification row per targeted user —
# the iOS app receives them via its existing poll cycle
# (GET /api/v1/notifications?since=...) with no new API endpoint required.

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


class Broadcast(db.Model):
    __tablename__ = 'broadcasts'

    id           = db.Column(db.Integer, primary_key=True)
    title        = db.Column(db.String(255), nullable=False)
    body         = db.Column(db.Text,        nullable=False)
    # JSON-encoded list of role strings targeted, e.g. '["inspector","project_manager"]'
    target_roles = db.Column(db.JSON,        nullable=False, default=list)
    sent_by_id   = db.Column(db.Integer, db.ForeignKey('users.id', ondelete='SET NULL'), nullable=True)
    sent_at      = db.Column(db.DateTime, default=now_eastern, nullable=False)
    # Number of Notification rows created (resolved at send time)
    recipient_count = db.Column(db.Integer, default=0, nullable=False)

    sent_by = db.relationship('User', foreign_keys=[sent_by_id])

    def __repr__(self):
        return f'<Broadcast {self.id} "{self.title[:30]}" roles={self.target_roles}>'