feat: calculate the esimtate invoice numbers (#10823)

frontend/src/component/admin/billing/BillingInvoices/BillingInvoice/BillingInvoice.tsx

@@ -15,7 +15,10 @@ import { formatCurrency } from './formatCurrency.ts';
 import { Badge } from 'component/common/Badge/Badge.tsx';
 import { BillingInvoiceFooter } from './BillingInvoiceFooter/BillingInvoiceFooter.tsx';
 import { StyledAmountCell, StyledSubgrid } from './BillingInvoice.styles.tsx';
-import type { DetailedInvoicesSchemaInvoicesItem } from 'openapi';
+import type {
+    DetailedInvoicesSchemaInvoicesItem,
+    DetailedInvoicesLineSchema,
+} from 'openapi';
 import { BillingInvoiceUsageRow } from './BillingInvoiceUsageRow/BillingInvoiceUsageRow.tsx';
 import { BillingInvoiceMainRow } from './BillingInvoiceMainRow/BillingInvoiceMainRow.tsx';
 
@@ -64,7 +67,7 @@ const StyledInvoiceGrid = styled('div')(({ theme }) => ({
     padding: theme.spacing(0, 2, 2),
 }));
 
-const HeaderCell = styled(Typography)(({ theme }) => ({
+const HeaderCell = styled('div')(({ theme }) => ({
     fontSize: theme.typography.body2.fontSize,
     fontWeight: theme.typography.fontWeightMedium,
     color: theme.palette.text.secondary,
@@ -100,6 +103,49 @@ const CardActions = styled('div')(({ theme }) => ({
     padding: theme.spacing(0, 2, 2),
 }));
 
+const calculateEstimateTotals = (
+    status: string,
+    subtotal: number,
+    taxAmount: number,
+    totalAmount: number,
+    taxPercentage: number | undefined,
+    mainLines: DetailedInvoicesLineSchema[],
+    usageLines: DetailedInvoicesLineSchema[],
+) => {
+    if (status !== 'estimate') {
+        return {
+            subtotal: subtotal,
+            taxAmount: taxAmount,
+            totalAmount: totalAmount,
+        };
+    }
+
+    const mainLinesTotal = mainLines.reduce(
+        (sum, line) => sum + (line.totalAmount || 0),
+        0,
+    );
+
+    const usageLinesTotal = usageLines.reduce((sum, line) => {
+        const overage =
+            line.consumption && line.limit
+                ? Math.max(0, line.consumption - line.limit)
+                : 0;
+        return sum + overage * (line.unitPrice || 0);
+    }, 0);
+
+    const calculatedSubtotal = mainLinesTotal + usageLinesTotal;
+    const calculatedTaxAmount = taxPercentage
+        ? calculatedSubtotal * (taxPercentage / 100)
+        : 0;
+    const calculatedTotalAmount = calculatedSubtotal + calculatedTaxAmount;
+
+    return {
+        subtotal: calculatedSubtotal,
+        taxAmount: calculatedTaxAmount,
+        totalAmount: calculatedTotalAmount,
+    };
+};
+
 type BillingInvoiceProps = DetailedInvoicesSchemaInvoicesItem &
     Pick<ComponentProps<typeof Accordion>, 'defaultExpanded'>;
 
@@ -111,6 +157,7 @@ export const BillingInvoice = ({
     totalAmount,
     subtotal,
     taxAmount,
+    taxPercentage,
     currency,
     mainLines,
     usageLines,
@@ -130,6 +177,20 @@ export const BillingInvoice = ({
         ? `, ${new Date(invoiceDate).getFullYear()}`
         : '';
 
+    const {
+        subtotal: calculatedSubtotal,
+        taxAmount: calculatedTaxAmount,
+        totalAmount: calculatedTotalAmount,
+    } = calculateEstimateTotals(
+        status,
+        subtotal,
+        taxAmount,
+        totalAmount,
+        taxPercentage,
+        mainLines,
+        usageLines,
+    );
+
     return (
         <StyledAccordion defaultExpanded={Boolean(defaultExpanded)}>
             <HeaderRoot
@@ -160,7 +221,7 @@ export const BillingInvoice = ({
                         <Badge color='success'>Paid</Badge>
                     ) : null}
                     <Typography variant='body1' sx={{ fontWeight: 700 }}>
-                        {formatCurrency(totalAmount, currency)}
+                        {formatCurrency(calculatedTotalAmount, currency)}
                     </Typography>
                 </HeaderRight>
             </HeaderRoot>
@@ -208,6 +269,7 @@ export const BillingInvoice = ({
                                     <BillingInvoiceUsageRow
                                         {...line}
                                         invoiceCurrency={currency}
+                                        invoiceStatus={status}
                                     />
                                 </StyledTableRow>
                             ))}
@@ -217,10 +279,12 @@ export const BillingInvoice = ({
                     )}
 
                     <BillingInvoiceFooter
-                        subTotal={subtotal}
-                        taxAmount={taxAmount}
-                        totalAmount={totalAmount}
+                        subTotal={calculatedSubtotal}
+                        taxAmount={calculatedTaxAmount}
+                        taxPercentage={taxPercentage}
+                        totalAmount={calculatedTotalAmount}
                         currency={currency}
+                        status={status}
                     />
                 </StyledInvoiceGrid>
                 {invoiceURL || invoicePDF ? (

frontend/src/component/admin/billing/BillingInvoices/BillingInvoice/BillingInvoiceFooter/BillingInvoiceFooter.tsx

@@ -29,10 +29,12 @@ const StyledTableFooterCell = styled('div', {
     ...(colSpan ? { gridColumn: `span ${colSpan}` } : {}),
 }));
 
-const TaxRow: FC<{ value?: number; currency?: string }> = ({
-    value,
-    currency,
-}) => {
+const TaxRow: FC<{
+    value?: number;
+    percentage?: number;
+    currency?: string;
+    status?: string;
+}> = ({ value, percentage, currency, status }) => {
     if (value === undefined) {
         return (
             <StyledTableFooterCell colSpan={2}>
@@ -41,9 +43,13 @@ const TaxRow: FC<{ value?: number; currency?: string }> = ({
         );
     }
 
+    const isEstimate = status === 'estimate';
+    const taxLabel =
+        isEstimate && percentage !== undefined ? `Tax (${percentage}%)` : 'Tax';
+
     return (
         <>
-            <StyledTableFooterCell>Tax</StyledTableFooterCell>
+            <StyledTableFooterCell>{taxLabel}</StyledTableFooterCell>
             <StyledTableFooterCell>
                 <StyledAmountCell>
                     {formatCurrency(value, currency)}
@@ -56,15 +62,19 @@ const TaxRow: FC<{ value?: number; currency?: string }> = ({
 type BillingInvoiceFooterProps = {
     subTotal?: number;
     taxAmount?: number;
+    taxPercentage?: number;
     totalAmount: number;
     currency?: string;
+    status?: string;
 };
 
 export const BillingInvoiceFooter = ({
     subTotal,
     taxAmount,
+    taxPercentage,
     totalAmount,
     currency,
+    status,
 }: BillingInvoiceFooterProps) => {
     return (
         <StyledTableFooter>
@@ -77,7 +87,12 @@ export const BillingInvoiceFooter = ({
                 </StyledTableFooterCell>
             </StyledTableFooterRow>
             <StyledTableFooterRow>
-                <TaxRow value={taxAmount} currency={currency} />
+                <TaxRow
+                    value={taxAmount}
+                    percentage={taxPercentage}
+                    currency={currency}
+                    status={status}
+                />
             </StyledTableFooterRow>
             <StyledTableFooterRow last>
                 <StyledTableFooterCell>Total</StyledTableFooterCell>

frontend/src/component/admin/billing/BillingInvoices/BillingInvoice/BillingInvoiceUsageRow/BillingInvoiceUsageRow.tsx

@@ -17,6 +17,7 @@ const StyledCellWithIndicator = styled('div')(({ theme }) => ({
 
 type BillingInvoiceUsageRowProps = DetailedInvoicesLineSchema & {
     invoiceCurrency?: string;
+    invoiceStatus?: string;
 };
 
 export const BillingInvoiceUsageRow = ({
@@ -24,36 +25,56 @@ export const BillingInvoiceUsageRow = ({
     consumption,
     limit,
     description,
-    currency,
     totalAmount,
+    unitPrice,
     invoiceCurrency,
+    invoiceStatus,
 }: BillingInvoiceUsageRowProps) => {
     const percentage =
         limit && limit > 0
             ? Math.min(100, Math.round(((consumption || 0) / limit) * 100))
             : undefined;
 
-    const hasAmount = totalAmount && totalAmount > 0;
+    const isEstimate = invoiceStatus === 'estimate';
+    const overage =
+        isEstimate && consumption && limit
+            ? Math.max(0, consumption - limit)
+            : quantity;
+    const includedAmount =
+        isEstimate && consumption && limit
+            ? Math.min(consumption, limit)
+            : consumption;
+    const calculatedAmount =
+        isEstimate && unitPrice && consumption && limit
+            ? Math.max(0, consumption - limit) * unitPrice
+            : totalAmount;
+
+    const hasAmount = calculatedAmount && calculatedAmount > 0;
+
+    const formatIncludedDisplay = () => {
+        if (includedAmount !== undefined && limit !== undefined) {
+            return `${formatLargeNumbers(includedAmount)}/${formatLargeNumbers(limit)}`;
+        }
+        if (includedAmount !== undefined) {
+            return formatLargeNumbers(includedAmount);
+        }
+        if (limit !== undefined) {
+            return formatLargeNumbers(limit);
+        }
+        return '–';
+    };
 
     return (
         <>
             <StyledDescriptionCell>{description}</StyledDescriptionCell>
             <StyledCellWithIndicator>
                 <ConsumptionIndicator percentage={percentage || 0} />
-                <div>
-                    {consumption !== undefined && limit !== undefined
-                        ? `${formatLargeNumbers(consumption)}/${formatLargeNumbers(limit)}`
-                        : consumption !== undefined
-                          ? formatLargeNumbers(consumption)
-                          : limit !== undefined
-                            ? formatLargeNumbers(limit)
-                            : '–'}
-                </div>
+                <div>{formatIncludedDisplay()}</div>
             </StyledCellWithIndicator>
-            <div>{quantity ? formatLargeNumbers(quantity) : ''}</div>
+            <div>{overage ? formatLargeNumbers(overage) : ''}</div>
             {hasAmount ? (
                 <StyledAmountCell>
-                    {formatCurrency(totalAmount, invoiceCurrency)}
+                    {formatCurrency(calculatedAmount, invoiceCurrency)}
                 </StyledAmountCell>
             ) : (
                 <div />

frontend/src/openapi/models/detailedInvoicesLineSchema.ts

@@ -23,4 +23,6 @@ export interface DetailedInvoicesLineSchema {
     startDate?: string;
     /** Total amount for this line item in minor currency units */
     totalAmount: number;
+    /** Unit price for usage line items */
+    unitPrice?: number;
 }

frontend/src/openapi/models/detailedInvoicesSchemaInvoicesItem.ts

@@ -26,6 +26,8 @@ export type DetailedInvoicesSchemaInvoicesItem = {
     subtotal: number;
     /** Tax amount for the invoice */
     taxAmount: number;
+    /** Tax percentage for the invoice */
+    taxPercentage?: number;
     /** Total amount for the invoice */
     totalAmount: number;
     /** Usage line items (traffic, consumption usage, overages) */