-- Make association_id nullable so company-level accounts can exist
ALTER TABLE public.stripe_account_mappings ALTER COLUMN association_id DROP NOT NULL;

-- Drop the unique constraint on association_id (it's one-to-one) so we can have nulls
ALTER TABLE public.stripe_account_mappings DROP CONSTRAINT IF EXISTS stripe_account_mappings_association_id_fkey;
ALTER TABLE public.stripe_account_mappings DROP CONSTRAINT IF EXISTS stripe_account_mappings_association_id_key;

-- Re-add FK but allow nulls
ALTER TABLE public.stripe_account_mappings 
  ADD CONSTRAINT stripe_account_mappings_association_id_fkey 
  FOREIGN KEY (association_id) REFERENCES public.associations(id) ON DELETE CASCADE;

-- Add unique constraint that allows multiple nulls
CREATE UNIQUE INDEX IF NOT EXISTS stripe_account_mappings_association_id_unique 
  ON public.stripe_account_mappings (association_id) WHERE association_id IS NOT NULL;

-- Add label column for company accounts
ALTER TABLE public.stripe_account_mappings ADD COLUMN IF NOT EXISTS label TEXT;