accounted/supabase/migrations/20260531120000_match_batch_allocate_cross_currency.sql

-- PR #607 — match_batch_allocate cross-currency support.
--
-- Drops the BATCH_CURRENCY_MISMATCH guard for allocations where the
-- invoice's currency differs from the transaction's. In that case the
-- allocation pays the FULL remaining of the invoice (matches the
-- single-tx match-supplier-invoice convention; partial cross-currency
-- payments are not supported in v1). The FX residual is posted to
-- 7960 (Valutakursförluster) or 3960 (Valutakursvinster) per BAS 2026.
--
-- Allocation.amount is interpreted as the TRANSACTION currency for every
-- row, including cross-currency rows — the bank tx already carries the
-- bank-side conversion. The invoice's stored exchange_rate is used to
-- compute the SEK amount that the AR/AP account was booked at when the
-- invoice was created (bookedSek). The FX diff is bookedSek vs the
-- allocation.amount (the actual bank movement).
--
-- Sign conventions per direction:
--   - Customer (income): bookedSek - allocation.amount = AR shortage
--     positive  → received LESS SEK than booked  → Dr 7960 (loss)
--     negative  → received MORE SEK than booked  → Cr 3960 (gain)
--   - Supplier (expense): bookedSek - allocation.amount = AP shortage
--     positive  → paid LESS SEK than booked      → Cr 3960 (gain)
--     negative  → paid MORE SEK than booked      → Dr 7960 (loss)
--
-- This patch only changes the validation + line-construction loops.
-- Everything else (caller membership check, dedupe, deadlock-stable
-- locking, period resolution, payment-row inserts) stays byte-identical.

CREATE OR REPLACE FUNCTION public.match_batch_allocate(
  p_tx_id uuid,
  p_allocations jsonb,
  p_user_id uuid,
  p_company_id uuid
)
RETURNS jsonb
LANGUAGE plpgsql
SECURITY DEFINER
SET search_path TO 'public'
AS $$
DECLARE
  v_tx RECORD;
  v_tx_abs numeric;
  v_allocation jsonb;
  v_alloc_index int := 0;
  v_kind text;
  v_invoice_id uuid;
  v_supplier_invoice_id uuid;
  v_alloc_amount numeric;
  v_total_allocated numeric := 0;
  v_has_customer boolean := false;
  v_has_supplier boolean := false;
  v_seen_ids text[] := ARRAY[]::text[];
  v_target_id text;
  v_invoice RECORD;
  v_si_invoice RECORD;
  v_supplier_name text;
  v_supplier_invoice_number text;
  v_invoice_number text;
  v_fiscal_period_id uuid;
  v_period_is_closed boolean;
  v_period_locked_at timestamptz;
  v_journal_entry_id uuid := gen_random_uuid();
  v_voucher_series text := 'A';
  v_voucher_number int;
  v_entry_description text;
  v_source_type text;
  v_line_sort_order int := 0;
  v_new_paid numeric;
  v_new_remaining numeric;
  v_new_status text;
  v_now timestamptz := now();
  v_payment_id uuid;
  v_results jsonb := '[]'::jsonb;
  -- Cross-currency support locals
  v_inv_remaining numeric;
  v_inv_currency text;
  v_inv_fx_rate numeric;
  v_booked_sek numeric;       -- amount on 1510/2440 in SEK at booking time
  v_fx_diff numeric;          -- bookedSek - allocation.amount (signed)
  v_paid_in_inv_currency numeric;  -- what goes into payment row
BEGIN
  IF NOT EXISTS (
    SELECT 1 FROM public.company_members
    WHERE user_id = auth.uid() AND company_id = p_company_id
  ) THEN
    RETURN jsonb_build_object('ok', false, 'code', 'BATCH_UNAUTHORIZED');
  END IF;

  SELECT * INTO v_tx FROM public.transactions
  WHERE id = p_tx_id AND company_id = p_company_id FOR UPDATE;
  IF NOT FOUND THEN RETURN jsonb_build_object('ok', false, 'code', 'BATCH_TX_NOT_FOUND'); END IF;
  IF v_tx.journal_entry_id IS NOT NULL THEN
    RETURN jsonb_build_object('ok', false, 'code', 'BATCH_TX_ALREADY_BOOKED',
      'details', jsonb_build_object('journal_entry_id', v_tx.journal_entry_id));
  END IF;
  IF v_tx.amount = 0 THEN RETURN jsonb_build_object('ok', false, 'code', 'BATCH_TX_ZERO_AMOUNT'); END IF;
  v_tx_abs := ABS(v_tx.amount);

  IF jsonb_typeof(p_allocations) IS DISTINCT FROM 'array' OR jsonb_array_length(p_allocations) = 0 THEN
    RETURN jsonb_build_object('ok', false, 'code', 'BATCH_NO_ALLOCATIONS');
  END IF;

  -- Validation pass with deadlock-stable ordering. The currency check
  -- that was here (BATCH_CURRENCY_MISMATCH per allocation) is GONE — we
  -- now accept cross-currency rows and compute FX diff downstream.
  -- For cross-currency, the allocation.amount must be approximately
  -- invoice.remaining × invoice.exchange_rate (within 10%) so a typo
  -- ("140" when they meant "1390" for a USD invoice) doesn't silently
  -- credit the wrong bank chunk.
  FOR v_allocation IN
    SELECT value FROM jsonb_array_elements(p_allocations) AS t(value)
    ORDER BY COALESCE(value->>'invoice_id', value->>'supplier_invoice_id', '')
  LOOP
    v_kind := v_allocation->>'kind';
    v_alloc_amount := (v_allocation->>'amount')::numeric;
    v_target_id := COALESCE(v_allocation->>'invoice_id', v_allocation->>'supplier_invoice_id');

    IF v_alloc_amount IS NULL OR v_alloc_amount <= 0 THEN
      RETURN jsonb_build_object('ok', false, 'code', 'BATCH_INVALID_AMOUNT',
        'details', jsonb_build_object('index', v_alloc_index, 'amount', v_alloc_amount));
    END IF;
    IF v_target_id IS NOT NULL AND v_target_id = ANY(v_seen_ids) THEN
      RETURN jsonb_build_object('ok', false, 'code', 'BATCH_DUPLICATE_ALLOCATION',
        'details', jsonb_build_object('id', v_target_id, 'index', v_alloc_index));
    END IF;
    IF v_target_id IS NOT NULL THEN v_seen_ids := array_append(v_seen_ids, v_target_id); END IF;
    v_total_allocated := v_total_allocated + v_alloc_amount;

    IF v_kind = 'customer_invoice' THEN
      v_has_customer := true;
      v_invoice_id := (v_allocation->>'invoice_id')::uuid;
      SELECT * INTO v_invoice FROM public.invoices
      WHERE id = v_invoice_id AND company_id = p_company_id FOR UPDATE;
      IF NOT FOUND THEN
        RETURN jsonb_build_object('ok', false, 'code', 'BATCH_INVOICE_NOT_FOUND',
          'details', jsonb_build_object('index', v_alloc_index, 'invoice_id', v_invoice_id));
      END IF;
      IF v_invoice.status NOT IN ('sent', 'overdue', 'partially_paid') THEN
        RETURN jsonb_build_object('ok', false, 'code', 'BATCH_INVOICE_NOT_OPEN',
          'details', jsonb_build_object('index', v_alloc_index, 'invoice_id', v_invoice_id, 'status', v_invoice.status));
      END IF;

      v_inv_remaining := COALESCE(v_invoice.remaining_amount, v_invoice.total);
      v_inv_currency := v_invoice.currency;
      v_inv_fx_rate := v_invoice.exchange_rate;

      IF v_inv_currency = v_tx.currency THEN
        -- Same-currency: existing partial-allowed semantics.
        IF v_alloc_amount > v_inv_remaining + 0.005 THEN
          RETURN jsonb_build_object('ok', false, 'code', 'BATCH_OVERSHOOT',
            'details', jsonb_build_object('index', v_alloc_index, 'invoice_id', v_invoice_id,
              'requested', v_alloc_amount, 'remaining', v_inv_remaining));
        END IF;
      ELSE
        -- Cross-currency: full-payment only. The allocation.amount is the
        -- SEK the bank actually credited; we sanity-check it against
        -- invoice.remaining × exchange_rate so an obvious typo doesn't
        -- silently misrepresent the FX diff. ±10% catches the typo while
        -- letting genuine rate-day movement through.
        IF v_inv_fx_rate IS NULL OR v_inv_fx_rate <= 0 THEN
          RETURN jsonb_build_object('ok', false, 'code', 'BATCH_FX_RATE_MISSING',
            'details', jsonb_build_object('index', v_alloc_index, 'invoice_id', v_invoice_id,
              'invoice_currency', v_inv_currency));
        END IF;
        v_booked_sek := ROUND(v_inv_remaining * v_inv_fx_rate * 100) / 100;
        IF ABS(v_alloc_amount - v_booked_sek) > v_booked_sek * 0.10 THEN
          RETURN jsonb_build_object('ok', false, 'code', 'BATCH_FX_DEVIATION_TOO_LARGE',
            'details', jsonb_build_object('index', v_alloc_index, 'invoice_id', v_invoice_id,
              'allocation_amount', v_alloc_amount, 'expected_sek', v_booked_sek));
        END IF;
      END IF;

    ELSIF v_kind = 'supplier_invoice' THEN
      v_has_supplier := true;
      v_supplier_invoice_id := (v_allocation->>'supplier_invoice_id')::uuid;
      SELECT * INTO v_si_invoice FROM public.supplier_invoices
      WHERE id = v_supplier_invoice_id AND company_id = p_company_id FOR UPDATE;
      IF NOT FOUND THEN
        RETURN jsonb_build_object('ok', false, 'code', 'BATCH_SUPPLIER_INVOICE_NOT_FOUND',
          'details', jsonb_build_object('index', v_alloc_index, 'supplier_invoice_id', v_supplier_invoice_id));
      END IF;
      IF v_si_invoice.status NOT IN ('registered', 'approved', 'overdue', 'partially_paid') THEN
        RETURN jsonb_build_object('ok', false, 'code', 'BATCH_SUPPLIER_INVOICE_NOT_OPEN',
          'details', jsonb_build_object('index', v_alloc_index, 'supplier_invoice_id', v_supplier_invoice_id, 'status', v_si_invoice.status));
      END IF;

      v_inv_remaining := COALESCE(v_si_invoice.remaining_amount, v_si_invoice.total);
      v_inv_currency := v_si_invoice.currency;
      v_inv_fx_rate := v_si_invoice.exchange_rate;

      IF v_inv_currency = v_tx.currency THEN
        IF v_alloc_amount > v_inv_remaining + 0.005 THEN
          RETURN jsonb_build_object('ok', false, 'code', 'BATCH_OVERSHOOT',
            'details', jsonb_build_object('index', v_alloc_index, 'supplier_invoice_id', v_supplier_invoice_id,
              'requested', v_alloc_amount, 'remaining', v_inv_remaining));
        END IF;
      ELSE
        IF v_inv_fx_rate IS NULL OR v_inv_fx_rate <= 0 THEN
          RETURN jsonb_build_object('ok', false, 'code', 'BATCH_FX_RATE_MISSING',
            'details', jsonb_build_object('index', v_alloc_index, 'supplier_invoice_id', v_supplier_invoice_id,
              'invoice_currency', v_inv_currency));
        END IF;
        v_booked_sek := ROUND(v_inv_remaining * v_inv_fx_rate * 100) / 100;
        IF ABS(v_alloc_amount - v_booked_sek) > v_booked_sek * 0.10 THEN
          RETURN jsonb_build_object('ok', false, 'code', 'BATCH_FX_DEVIATION_TOO_LARGE',
            'details', jsonb_build_object('index', v_alloc_index, 'supplier_invoice_id', v_supplier_invoice_id,
              'allocation_amount', v_alloc_amount, 'expected_sek', v_booked_sek));
        END IF;
      END IF;
    ELSE
      RETURN jsonb_build_object('ok', false, 'code', 'BATCH_INVALID_KIND',
        'details', jsonb_build_object('index', v_alloc_index, 'kind', v_kind));
    END IF;
    v_alloc_index := v_alloc_index + 1;
  END LOOP;

  IF v_has_customer AND v_has_supplier THEN
    RETURN jsonb_build_object('ok', false, 'code', 'BATCH_MIXED_KINDS_UNSUPPORTED');
  END IF;

  IF v_total_allocated > v_tx_abs + 0.005 THEN
    RETURN jsonb_build_object('ok', false, 'code', 'BATCH_AMOUNT_EXCEEDS_TX',
      'details', jsonb_build_object('allocated', v_total_allocated, 'tx_amount_abs', v_tx_abs));
  END IF;

  IF v_has_customer AND v_tx.amount <= 0 THEN
    RETURN jsonb_build_object('ok', false, 'code', 'BATCH_DIRECTION_MISMATCH',
      'details', jsonb_build_object('expected', 'income', 'tx_amount', v_tx.amount));
  END IF;
  IF v_has_supplier AND v_tx.amount >= 0 THEN
    RETURN jsonb_build_object('ok', false, 'code', 'BATCH_DIRECTION_MISMATCH',
      'details', jsonb_build_object('expected', 'expense', 'tx_amount', v_tx.amount));
  END IF;

  SELECT id, is_closed, locked_at INTO v_fiscal_period_id, v_period_is_closed, v_period_locked_at
  FROM public.fiscal_periods
  WHERE company_id = p_company_id AND v_tx.date BETWEEN period_start AND period_end
  ORDER BY period_start DESC LIMIT 1;
  IF v_fiscal_period_id IS NULL THEN
    RETURN jsonb_build_object('ok', false, 'code', 'BATCH_NO_FISCAL_PERIOD',
      'details', jsonb_build_object('tx_date', v_tx.date));
  END IF;
  IF v_period_is_closed OR v_period_locked_at IS NOT NULL THEN
    RETURN jsonb_build_object('ok', false, 'code', 'BATCH_PERIOD_LOCKED',
      'details', jsonb_build_object('fiscal_period_id', v_fiscal_period_id,
        'is_closed', v_period_is_closed, 'locked_at', v_period_locked_at));
  END IF;

  v_entry_description := CASE WHEN v_has_customer THEN 'Samlingsinbetalning ' || v_tx.date ELSE 'Samlingsbetalning ' || v_tx.date END;
  v_source_type := CASE WHEN v_has_customer THEN 'invoice_paid' ELSE 'supplier_invoice_paid' END;

  INSERT INTO public.journal_entries
    (id, user_id, company_id, fiscal_period_id, voucher_number, voucher_series,
     entry_date, description, source_type, status)
  VALUES
    (v_journal_entry_id, p_user_id, p_company_id, v_fiscal_period_id, 0, v_voucher_series,
     v_tx.date, v_entry_description, v_source_type, 'draft');

  -- Line-build pass. For each allocation:
  --   - Same-currency: one AR/AP line at the allocation.amount.
  --   - Cross-currency: one AR/AP line at bookedSek + one FX-diff line.
  -- Bank line on 1930 is the sum of allocation.amount (all SEK).
  v_alloc_index := 0;
  FOR v_allocation IN
    SELECT value FROM jsonb_array_elements(p_allocations) AS t(value)
    ORDER BY COALESCE(value->>'invoice_id', value->>'supplier_invoice_id', '')
  LOOP
    v_alloc_amount := (v_allocation->>'amount')::numeric;

    IF v_has_customer THEN
      v_invoice_id := (v_allocation->>'invoice_id')::uuid;
      SELECT invoice_number, currency, exchange_rate, remaining_amount, total
        INTO v_invoice_number, v_inv_currency, v_inv_fx_rate, v_inv_remaining, v_booked_sek
      FROM public.invoices WHERE id = v_invoice_id;
      v_inv_remaining := COALESCE(v_inv_remaining, v_booked_sek); -- v_booked_sek temp = invoice.total

      IF v_inv_currency = v_tx.currency THEN
        -- Same-currency AR line.
        INSERT INTO public.journal_entry_lines
          (journal_entry_id, account_number, debit_amount, credit_amount, currency,
           sort_order, line_description)
        VALUES
          (v_journal_entry_id, '1510', 0, v_alloc_amount, v_tx.currency, v_line_sort_order,
           'Faktura ' || COALESCE(v_invoice_number, ''));
        v_line_sort_order := v_line_sort_order + 1;
      ELSE
        -- Cross-currency: AR booked at invoice's rate, FX diff to 7960/3960.
        v_booked_sek := ROUND(v_inv_remaining * v_inv_fx_rate * 100) / 100;
        v_fx_diff := ROUND((v_booked_sek - v_alloc_amount) * 100) / 100;

        INSERT INTO public.journal_entry_lines
          (journal_entry_id, account_number, debit_amount, credit_amount, currency,
           sort_order, line_description)
        VALUES
          (v_journal_entry_id, '1510', 0, v_booked_sek, v_tx.currency, v_line_sort_order,
           'Faktura ' || COALESCE(v_invoice_number, '') || ' (' || v_inv_currency || ')');
        v_line_sort_order := v_line_sort_order + 1;

        IF ABS(v_fx_diff) > 0.005 THEN
          IF v_fx_diff > 0 THEN
            -- bookedSek > received → AR shortage → loss → Dr 7960
            INSERT INTO public.journal_entry_lines
              (journal_entry_id, account_number, debit_amount, credit_amount, currency,
               sort_order, line_description)
            VALUES
              (v_journal_entry_id, '7960', v_fx_diff, 0, v_tx.currency, v_line_sort_order,
               'Valutakursförlust ' || COALESCE(v_invoice_number, ''));
          ELSE
            -- received > bookedSek → gain → Cr 3960
            INSERT INTO public.journal_entry_lines
              (journal_entry_id, account_number, debit_amount, credit_amount, currency,
               sort_order, line_description)
            VALUES
              (v_journal_entry_id, '3960', 0, ABS(v_fx_diff), v_tx.currency, v_line_sort_order,
               'Valutakursvinst ' || COALESCE(v_invoice_number, ''));
          END IF;
          v_line_sort_order := v_line_sort_order + 1;
        END IF;
      END IF;

    ELSE
      v_supplier_invoice_id := (v_allocation->>'supplier_invoice_id')::uuid;
      SELECT si.supplier_invoice_number, s.name, si.currency, si.exchange_rate,
             si.remaining_amount, si.total
        INTO v_supplier_invoice_number, v_supplier_name, v_inv_currency, v_inv_fx_rate,
             v_inv_remaining, v_booked_sek
      FROM public.supplier_invoices si LEFT JOIN public.suppliers s ON s.id = si.supplier_id
      WHERE si.id = v_supplier_invoice_id;
      v_inv_remaining := COALESCE(v_inv_remaining, v_booked_sek);

      IF v_inv_currency = v_tx.currency THEN
        INSERT INTO public.journal_entry_lines
          (journal_entry_id, account_number, debit_amount, credit_amount, currency,
           sort_order, line_description)
        VALUES
          (v_journal_entry_id, '2440', v_alloc_amount, 0, v_tx.currency, v_line_sort_order,
           TRIM(BOTH ' - ' FROM COALESCE(v_supplier_name, '') || ' - ' || COALESCE(v_supplier_invoice_number, '')));
        v_line_sort_order := v_line_sort_order + 1;
      ELSE
        v_booked_sek := ROUND(v_inv_remaining * v_inv_fx_rate * 100) / 100;
        v_fx_diff := ROUND((v_booked_sek - v_alloc_amount) * 100) / 100;

        INSERT INTO public.journal_entry_lines
          (journal_entry_id, account_number, debit_amount, credit_amount, currency,
           sort_order, line_description)
        VALUES
          (v_journal_entry_id, '2440', v_booked_sek, 0, v_tx.currency, v_line_sort_order,
           TRIM(BOTH ' - ' FROM
             COALESCE(v_supplier_name, '') || ' - ' || COALESCE(v_supplier_invoice_number, '')
             || ' (' || v_inv_currency || ')'));
        v_line_sort_order := v_line_sort_order + 1;

        IF ABS(v_fx_diff) > 0.005 THEN
          IF v_fx_diff > 0 THEN
            -- bookedAP > paidSEK → we paid less than booked → gain → Cr 3960
            INSERT INTO public.journal_entry_lines
              (journal_entry_id, account_number, debit_amount, credit_amount, currency,
               sort_order, line_description)
            VALUES
              (v_journal_entry_id, '3960', 0, v_fx_diff, v_tx.currency, v_line_sort_order,
               'Valutakursvinst ' || COALESCE(v_supplier_invoice_number, ''));
          ELSE
            -- bookedAP < paidSEK → we paid more than booked → loss → Dr 7960
            INSERT INTO public.journal_entry_lines
              (journal_entry_id, account_number, debit_amount, credit_amount, currency,
               sort_order, line_description)
            VALUES
              (v_journal_entry_id, '7960', ABS(v_fx_diff), 0, v_tx.currency, v_line_sort_order,
               'Valutakursförlust ' || COALESCE(v_supplier_invoice_number, ''));
          END IF;
          v_line_sort_order := v_line_sort_order + 1;
        END IF;
      END IF;
    END IF;
    v_alloc_index := v_alloc_index + 1;
  END LOOP;

  -- Bank settlement line — sum of allocation.amount (all in SEK).
  IF v_has_customer THEN
    INSERT INTO public.journal_entry_lines
      (journal_entry_id, account_number, debit_amount, credit_amount, currency,
       sort_order, line_description)
    VALUES
      (v_journal_entry_id, '1930', v_total_allocated, 0, v_tx.currency, v_line_sort_order,
       'Inbetalning ' || v_tx.date);
  ELSE
    INSERT INTO public.journal_entry_lines
      (journal_entry_id, account_number, debit_amount, credit_amount, currency,
       sort_order, line_description)
    VALUES
      (v_journal_entry_id, '1930', 0, v_total_allocated, v_tx.currency, v_line_sort_order,
       'Utbetalning ' || v_tx.date);
  END IF;

  SELECT voucher_number INTO v_voucher_number FROM public.commit_journal_entry(p_company_id, v_journal_entry_id);

  -- Payment-row inserts + invoice advance. Cross-currency rows mark the
  -- invoice as fully paid (remaining = 0) and store the invoice-currency
  -- amount in the payment row, matching match-supplier-invoice behavior.
  v_alloc_index := 0;
  FOR v_allocation IN
    SELECT value FROM jsonb_array_elements(p_allocations) AS t(value)
    ORDER BY COALESCE(value->>'invoice_id', value->>'supplier_invoice_id', '')
  LOOP
    v_alloc_amount := (v_allocation->>'amount')::numeric;

    IF v_has_customer THEN
      v_invoice_id := (v_allocation->>'invoice_id')::uuid;
      SELECT * INTO v_invoice FROM public.invoices WHERE id = v_invoice_id;

      IF v_invoice.currency = v_tx.currency THEN
        v_paid_in_inv_currency := v_alloc_amount;
      ELSE
        v_paid_in_inv_currency := COALESCE(v_invoice.remaining_amount, v_invoice.total);
      END IF;

      v_new_paid := ROUND((COALESCE(v_invoice.paid_amount, 0) + v_paid_in_inv_currency) * 100) / 100;
      v_new_remaining := GREATEST(0,
        ROUND((COALESCE(v_invoice.remaining_amount, v_invoice.total) - v_paid_in_inv_currency) * 100) / 100);
      v_new_status := CASE WHEN v_new_remaining <= 0.005 THEN 'paid' ELSE 'partially_paid' END;

      UPDATE public.invoices SET status = v_new_status,
        paid_at = CASE WHEN v_new_status = 'paid' THEN v_now ELSE paid_at END,
        paid_amount = v_new_paid, remaining_amount = v_new_remaining, updated_at = v_now
      WHERE id = v_invoice_id;

      INSERT INTO public.invoice_payments
        (user_id, company_id, invoice_id, payment_date, amount, currency, exchange_rate,
         journal_entry_id, transaction_id)
      VALUES
        (p_user_id, p_company_id, v_invoice_id, v_tx.date, v_paid_in_inv_currency, v_invoice.currency,
         v_invoice.exchange_rate, v_journal_entry_id, p_tx_id)
      RETURNING id INTO v_payment_id;

      v_results := v_results || jsonb_build_array(jsonb_build_object(
        'kind', 'customer_invoice', 'invoice_id', v_invoice_id, 'payment_id', v_payment_id,
        'status', v_new_status, 'paid_amount', v_new_paid, 'remaining_amount', v_new_remaining,
        'amount', v_alloc_amount,
        'cross_currency', v_invoice.currency <> v_tx.currency));
    ELSE
      v_supplier_invoice_id := (v_allocation->>'supplier_invoice_id')::uuid;
      SELECT * INTO v_si_invoice FROM public.supplier_invoices WHERE id = v_supplier_invoice_id;

      IF v_si_invoice.currency = v_tx.currency THEN
        v_paid_in_inv_currency := v_alloc_amount;
      ELSE
        v_paid_in_inv_currency := COALESCE(v_si_invoice.remaining_amount, v_si_invoice.total);
      END IF;

      v_new_paid := ROUND((COALESCE(v_si_invoice.paid_amount, 0) + v_paid_in_inv_currency) * 100) / 100;
      v_new_remaining := GREATEST(0,
        ROUND((COALESCE(v_si_invoice.remaining_amount, v_si_invoice.total) - v_paid_in_inv_currency) * 100) / 100);
      v_new_status := CASE WHEN v_new_remaining <= 0.005 THEN 'paid' ELSE 'partially_paid' END;

      UPDATE public.supplier_invoices SET status = v_new_status,
        paid_at = CASE WHEN v_new_status = 'paid' THEN v_now ELSE paid_at END,
        paid_amount = v_new_paid, remaining_amount = v_new_remaining,
        payment_journal_entry_id = v_journal_entry_id, updated_at = v_now
      WHERE id = v_supplier_invoice_id;

      INSERT INTO public.supplier_invoice_payments
        (user_id, company_id, supplier_invoice_id, payment_date, amount, currency,
         journal_entry_id, transaction_id)
      VALUES
        (p_user_id, p_company_id, v_supplier_invoice_id, v_tx.date, v_paid_in_inv_currency,
         v_si_invoice.currency, v_journal_entry_id, p_tx_id)
      RETURNING id INTO v_payment_id;

      v_results := v_results || jsonb_build_array(jsonb_build_object(
        'kind', 'supplier_invoice', 'supplier_invoice_id', v_supplier_invoice_id,
        'payment_id', v_payment_id, 'status', v_new_status, 'paid_amount', v_new_paid,
        'remaining_amount', v_new_remaining, 'amount', v_alloc_amount,
        'cross_currency', v_si_invoice.currency <> v_tx.currency));
    END IF;
    v_alloc_index := v_alloc_index + 1;
  END LOOP;

  UPDATE public.transactions SET journal_entry_id = v_journal_entry_id, is_business = TRUE,
    invoice_id = CASE WHEN jsonb_array_length(p_allocations) = 1 AND v_has_customer AND ABS(v_total_allocated - v_tx_abs) < 0.005
      THEN (p_allocations->0->>'invoice_id')::uuid ELSE NULL END,
    supplier_invoice_id = CASE WHEN jsonb_array_length(p_allocations) = 1 AND v_has_supplier AND ABS(v_total_allocated - v_tx_abs) < 0.005
      THEN (p_allocations->0->>'supplier_invoice_id')::uuid ELSE NULL END,
    potential_invoice_id = NULL, potential_supplier_invoice_id = NULL,
    updated_at = v_now WHERE id = p_tx_id;

  RETURN jsonb_build_object('ok', true, 'journal_entry_id', v_journal_entry_id,
    'voucher_series', v_voucher_series, 'voucher_number', v_voucher_number,
    'tx_id', p_tx_id, 'allocations', v_results, 'total_allocated', v_total_allocated,
    'leftover', ROUND((v_tx_abs - v_total_allocated) * 100) / 100);
END;
$$;

NOTIFY pgrst, 'reload schema';