-- In-app notifications for applicants (admin adjudication → inbox).
-- Best-effort insert after PUT/POST admin-result; full text duplicated for read UX.

CREATE TABLE IF NOT EXISTS user_notifications (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  recipient_user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  type TEXT NOT NULL CHECK (type IN ('admin_application_decision')),
  title TEXT NOT NULL,
  body TEXT NOT NULL,
  application_id TEXT NOT NULL,
  related_initiative_id UUID REFERENCES initiatives(id) ON DELETE SET NULL,
  source_admin_result_id UUID REFERENCES application_admin_results(id) ON DELETE SET NULL,
  decision TEXT NOT NULL CHECK (decision IN ('approved','rejected')),
  merit_category_label TEXT,
  feedback_text TEXT NOT NULL DEFAULT '',
  rationale_text TEXT,
  read_at TIMESTAMPTZ,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS user_notifications_inbox_idx
  ON user_notifications (recipient_user_id, created_at DESC);

CREATE INDEX IF NOT EXISTS user_notifications_unread_idx
  ON user_notifications (recipient_user_id)
  WHERE read_at IS NULL;