import {
  Body,
  Controller,
  forwardRef,
  HttpCode,
  HttpStatus,
  Inject,
  Logger,
  Post,
  UseGuards,
} from "@nestjs/common";
import { ApiOperation, ApiTags } from "@nestjs/swagger";
import {
  PaymentEventDto,
  MarkPaidResponseDto,
  BillQueryRequestDto,
  BillQueryResponseDto,
} from "./internal-payment.dto";
import { PaymentService } from "./payment.service";
import { BillingService } from "../billing/billing.service";
import { ServiceAuthGuard } from "../../common/guards/service-auth.guard";

/**
 * Consumer side of the payment microservice's outbox relay. Only the payment service may
 * call this (shared service token — restored per docs/cbe/CBE_IMPLEMENTATION_PLAN.md R8).
 * Idempotent by design — the relay delivers at-least-once, so duplicates must be harmless.
 * Becomes a queue consumer via PaymentEventsConsumer when RabbitMQ is available;
 * this HTTP endpoint remains as a transport-agnostic fallback.
 */
@ApiTags("Internal Payments")
@UseGuards(ServiceAuthGuard)
@Controller("internal/payments")
export class InternalPaymentController {
  private readonly logger = new Logger(InternalPaymentController.name);
  constructor(
    private readonly paymentService: PaymentService,
    @Inject(forwardRef(() => BillingService))
    private readonly billingService: BillingService,
  ) { }

  @Post("mark-paid")
  @HttpCode(HttpStatus.OK)
  @ApiOperation({
    summary:
      "Apply a payment.succeeded / payment.failed event from the payment service (idempotent)",
  })
  async markPaid(@Body() event: PaymentEventDto): Promise<MarkPaidResponseDto> {
    this.logger.log(`Marking payment ${event} as PAID`);
    return this.paymentService.handlePaymentEvent(event);
  }

  @Post("bill-query")
  @HttpCode(HttpStatus.OK)
  @ApiOperation({
    summary:
      "Live still-payable check + payer name for a CBE bill (called while CBE is on the line)",
  })
  async billQuery(
    @Body() request: BillQueryRequestDto,
  ): Promise<BillQueryResponseDto> {
    return this.billingService.billQuery(request.referenceId);
  }
}