CREATE TABLE IF NOT EXISTS user_settings (
  user_id UUID PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
  email_notifications BOOLEAN NOT NULL DEFAULT TRUE,
  in_app_notifications BOOLEAN NOT NULL DEFAULT TRUE,
  sms_notifications BOOLEAN NOT NULL DEFAULT FALSE,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS account_deletion_requests (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  status TEXT NOT NULL DEFAULT 'PENDING',
  reason TEXT,
  requested_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  processed_at TIMESTAMPTZ,
  processed_by UUID REFERENCES users(id) ON DELETE SET NULL
);

CREATE INDEX IF NOT EXISTS idx_account_deletion_requests_user_id
  ON account_deletion_requests(user_id);