-- Manual Deposits: let a deposit's source (credit) account be selectable instead of
-- always Undeposited Funds, and support multi-line deposits. This removes the forced
-- routing through Undeposited Funds (the structural cause of negative Undeposited
-- balances) and lets a deposit book interest income, refunds, reimbursements, etc.

-- Single-source fallback: a deposit with no lines credits this account (default
-- Undeposited Funds when null), keeping the existing "deposit received payments" flow.
alter table accounting.deposits
  add column if not exists source_account_id uuid references accounting.accounts(id);

-- Multi-line credits: one deposit = Dr Bank (total) and a set of credit lines, each
-- with its own account and amount. The deposit's amount equals the sum of its lines.
create table if not exists accounting.deposit_lines (
  id uuid primary key default gen_random_uuid(),
  deposit_id uuid not null references accounting.deposits(id) on delete cascade,
  company_id uuid not null references accounting.companies(id) on delete cascade,
  account_id uuid not null references accounting.accounts(id),
  amount numeric not null default 0,
  memo text,
  created_at timestamptz not null default now()
);
create index if not exists idx_deposit_lines_deposit on accounting.deposit_lines(deposit_id);

alter table accounting.deposit_lines enable row level security;

drop policy if exists "Accounting staff full access" on accounting.deposit_lines;
create policy "Accounting staff full access" on accounting.deposit_lines
  for all to authenticated
  using (accounting.is_accounting_staff()) with check (accounting.is_accounting_staff());

drop policy if exists "Members CRUD deposit_lines" on accounting.deposit_lines;
create policy "Members CRUD deposit_lines" on accounting.deposit_lines
  for all to authenticated
  using (accounting.is_company_member(company_id, auth.uid()))
  with check (accounting.is_company_member(company_id, auth.uid()));

grant select, insert, update, delete on accounting.deposit_lines to authenticated, service_role;

-- The deposit header trigger posts GL on insert (before any lines exist), so re-post
-- whenever the lines change too. post_deposit_gl clears + reposts, so this is idempotent.
create or replace function accounting.tg_deposit_line_gl()
  returns trigger language plpgsql security definer set search_path to 'public', 'accounting' as $$
begin
  begin
    perform accounting.post_deposit_gl(coalesce(new.deposit_id, old.deposit_id));
  exception when others then raise warning 'accounting: deposit line GL post failed: %', sqlerrm; end;
  return coalesce(new, old);
end$$;

drop trigger if exists trg_acct_deposit_line_gl on accounting.deposit_lines;
create trigger trg_acct_deposit_line_gl
  after insert or update or delete on accounting.deposit_lines
  for each row execute function accounting.tg_deposit_line_gl();