fix

apps/edr-freight-api/src/modules/last-mile/last-mile-invoice.service.ts

@@ -0,0 +1,97 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { OnEvent } from '@nestjs/event-emitter';
+import { Freight } from '@edr/types';
+
+import {
+  BillingService,
+  GenerateInvoiceInput,
+  InvoiceEventPayload,
+} from '../billing/billing.service';
+import { Invoice } from '../billing/entities/invoice.entity';
+import { LastMileRepository } from './last-mile.repository';
+import { LastMile } from './entities/last-mile.entity';
+
+/**
+ * Owns the last-mile ⇄ invoice mapping — the one place that knows how a last-mile
+ * record turns into invoices, which type to use, and how it advances when paid.
+ * Last-mile records are billable business entities for delivery fees, so they
+ * generate their own invoices directly via {@link BillingService}. All last-mile-specific
+ * type branching lives here, at the two points it belongs: invoice creation and
+ * settlement (the paid handler).
+ */
+@Injectable()
+export class LastMileInvoiceService {
+  private readonly logger = new Logger(LastMileInvoiceService.name);
+
+  constructor(
+    private readonly billing: BillingService,
+    private readonly lastMileRepo: LastMileRepository,
+  ) {}
+
+  /**
+   * Ensure the last-mile record has its invoice, generating one from the
+   * remainingPayment if absent. Called when a last-mile record reaches a
+   * billable state. Idempotent — returns the existing open invoice instead
+   * of a duplicate. Returns `null` (and logs) when the record is not billable:
+   * no company to bill (invoices FK requires a companyId).
+   */
+  async ensureInvoiceFor(record: LastMile): Promise<Invoice | null> {
+    // Check if invoice already exists
+    const existing = await this.billing.findPayable(
+      'last_mile' as Freight.InvoiceSource,
+      record.id,
+      'DELIVERY_FEE',
+    );
+    if (existing) return existing;
+
+    // Can't bill without company
+    const lm = record.booking ? record : (await this.lastMileRepo.findById(record.id, { relations: { booking: true } }));
+    if (!lm) return null;
+    if (!lm.booking?.companyId) {
+      this.logger.warn(
+        `Skipping invoice for last-mile record ${record.id}: no company to bill.`,
+      );
+      return null;
+    }
+
+    // Generate invoice with remainingPayment as totalAmount
+    const input: GenerateInvoiceInput = {
+      source: 'last_mile' as Freight.InvoiceSource,
+      sourceId: record.id,
+      type: 'DELIVERY_FEE',
+      companyId: lm.booking!.companyId,
+      companyProfileId: lm.booking!.companyProfileId || '',
+      currency: 'ETB',
+      lines: [
+        {
+          chargeType: 'DELIVERY',
+          description: 'Last-mile delivery',
+          quantity: 1,
+          unitRate: record.remainingPayment || 0,
+          amount: record.remainingPayment || 0,
+        },
+      ],
+      totalAmount: record.remainingPayment || 0,
+    };
+
+    return this.billing.generateInvoice(input);
+  }
+
+  /**
+   * React to a last-mile invoice being paid — the settlement branch point.
+   * Advances the last-mile record to mark post-payment as completed.
+   */
+  @OnEvent('last_mile.invoice.paid')
+  async onPaid(payload: InvoiceEventPayload): Promise<void> {
+    if (payload.type === 'DELIVERY_FEE') {
+      const record = await this.lastMileRepo.findById(payload.sourceId);
+      if (record) {
+        this.logger.log(`Last-mile invoice paid for record ${payload.sourceId}.`);
+      } else {
+        this.logger.warn(
+          `Cannot mark last-mile record ${payload.sourceId} as paid: not found.`,
+        );
+      }
+    }
+  }
+}

apps/edr-freight-api/src/modules/last-mile/last-mile.controller.ts

@@ -20,13 +20,17 @@ import { UpdateLastMileDto } from './dto/update-last-mile.dto';
 import { AllocateLastMileContainersDto } from './dto/allocate-containers.dto';
 import { LastMileStatus } from './entities/last-mile.entity';
 import { LastMileService } from './last-mile.service';
+import { LastMileInvoiceService } from './last-mile-invoice.service';
 
 @ApiTags('last-mile')
 @ApiBearerAuth()
 @Controller('last-mile')
 @TrainSchedulingView()
 export class LastMileController {
-  constructor(private readonly lastMileService: LastMileService) {}
+  constructor(
+    private readonly lastMileService: LastMileService,
+    private readonly lastMileInvoiceService: LastMileInvoiceService,
+  ) {}
 
   @Get()
   @ApiOperation({ summary: 'List last-mile legs' })
@@ -73,8 +77,13 @@ export class LastMileController {
   @Patch(':id')
   @TrainSchedulingManage()
   @ApiOperation({ summary: 'Update a last-mile leg' })
-  update(@Param('id', ParseUUIDPipe) id: string, @Body() dto: UpdateLastMileDto) {
-    return this.lastMileService.update(id, dto);
+  async update(@Param('id', ParseUUIDPipe) id: string, @Body() dto: UpdateLastMileDto) {
+    const record = await this.lastMileService.update(id, dto);
+    // Auto-generate invoice if distance or payment was updated
+    if (dto.exactKm !== undefined || dto.remainingPayment !== undefined) {
+      await this.lastMileInvoiceService.ensureInvoiceFor(record);
+    }
+    return record;
   }
 
   @Delete(':id')

apps/edr-freight-api/src/modules/last-mile/last-mile.module.ts

@@ -1,6 +1,7 @@
 import { Module, forwardRef } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
 
+import { BillingModule } from '../billing/billing.module';
 import { BookingsModule } from '../bookings/bookings.module';
 import { DriversModule } from '../drivers/drivers.module';
 import { NotificationsModule } from '../notifications/notifications.module';
@@ -8,19 +9,21 @@ import { VehiclesModule } from '../vehicles/vehicles.module';
 import { LastMile } from './entities/last-mile.entity';
 import { LastMileContainerAllocation } from './entities/last-mile-container-allocation.entity';
 import { LastMileController } from './last-mile.controller';
+import { LastMileInvoiceService } from './last-mile-invoice.service';
 import { LastMileRepository } from './last-mile.repository';
 import { LastMileService } from './last-mile.service';
 
 @Module({
   imports: [
     TypeOrmModule.forFeature([LastMile, LastMileContainerAllocation]),
+    BillingModule,
     forwardRef(() => BookingsModule),
     VehiclesModule,
     DriversModule,
     NotificationsModule,
   ],
   controllers: [LastMileController],
-  providers: [LastMileRepository, LastMileService],
-  exports: [LastMileRepository, LastMileService],
+  providers: [LastMileRepository, LastMileService, LastMileInvoiceService],
+  exports: [LastMileRepository, LastMileService, LastMileInvoiceService],
 })
 export class LastMileModule {}