import { Body, Controller, Get, Param, ParseUUIDPipe, Post, Query, Res } from '@nestjs/common';
import { ApiBearerAuth, ApiOperation, ApiTags } from '@nestjs/swagger';
import type { Response } from 'express';

import { CurrentUser } from '@edr/api-common';
import type { TCurrentUser } from '@tria-plc/api-common/modules/auth/types/current-user.type';
import { LastMileRequestStatus } from '@edr/types';

import { BookingStaff, MixedAudience, PortalCustomer } from '../../common/booking-guards';
import { FREIGHT_PERMS } from '../../seed/freight-permissions.registry';
import { ApproveLastMileRequestDto } from './dto/approve-last-mile-request.dto';
import { RejectLastMileRequestDto } from './dto/reject-last-mile-request.dto';
import { SignLastMileContractDto } from './dto/sign-last-mile-contract.dto';
import { SubmitLastMileRequestDto } from './dto/submit-last-mile-request.dto';
import { LastMileContractService } from './last-mile-contract.service';
import { LastMileRequestsService } from './last-mile-requests.service';

@ApiTags('last-mile-requests')
@ApiBearerAuth()
@Controller('last-mile-requests')
export class LastMileRequestsController {
  constructor(
    private readonly requestsService: LastMileRequestsService,
    private readonly contractService: LastMileContractService,
  ) {}

  @Get()
  @BookingStaff(FREIGHT_PERMS.lastMile.requestView)
  @ApiOperation({ summary: 'List last-mile confirmation requests' })
  findAll(
    @Query('status') status?: string,
    @Query('bookingId') bookingId?: string,
    @Query('page') page?: string,
    @Query('pageSize') pageSize?: string,
  ) {
    return this.requestsService.findAll({
      status: status as LastMileRequestStatus | undefined,
      bookingId,
      page: page ? parseInt(page, 10) : undefined,
      pageSize: pageSize ? parseInt(pageSize, 10) : undefined,
    });
  }

  @Get('free-truck-count')
  @BookingStaff(FREIGHT_PERMS.lastMile.requestView)
  @ApiOperation({ summary: 'Free (ACTIVE + unassigned) trucks — informational context for approval' })
  freeTruckCount() {
    return this.requestsService.freeTruckCount().then((count) => ({ count }));
  }

  // Customer-facing like :id — booking detail (portal + backoffice) lists the
  // booking's requests to link the stored LM contract. Ownership-checked in
  // the service for portal callers.
  @Get('by-booking/:bookingId')
  @MixedAudience(FREIGHT_PERMS.lastMile.requestView)
  @ApiOperation({ summary: "A booking's last-mile requests, newest first — LM contract reference" })
  findForBooking(
    @Param('bookingId', ParseUUIDPipe) bookingId: string,
    @CurrentUser() user: TCurrentUser,
  ) {
    return this.requestsService.findForBooking(bookingId, user?.id ?? null);
  }

  @Get(':id/price-estimate')
  @BookingStaff(FREIGHT_PERMS.lastMile.requestView)
  @ApiOperation({
    summary:
      'Rule-based last-mile price estimate (estimated km × live last-mile rates) — informational context for approval',
  })
  priceEstimate(@Param('id', ParseUUIDPipe) id: string) {
    return this.requestsService.priceEstimate(id);
  }

  // Customer-facing like :id/submit — the service ownership-checks against the
  // resolved company; staff may also open it (read-only view).
  @Get(':id/contract/view')
  @MixedAudience(FREIGHT_PERMS.lastMile.requestView)
  @ApiOperation({ summary: 'LM contract view model + rendered HTML + saved signature' })
  contractView(@Param('id', ParseUUIDPipe) id: string, @CurrentUser() user: TCurrentUser) {
    return this.contractService.getContractView(id, user?.id ?? null);
  }

  @Get(':id/contract/document')
  @MixedAudience(FREIGHT_PERMS.lastMile.requestView)
  @ApiOperation({ summary: 'Download the LM contract PDF (LM_<CustomerName>.pdf)' })
  async contractDocument(
    @Param('id', ParseUUIDPipe) id: string,
    @Res() res: Response,
  ): Promise<void> {
    const { stream, record } = await this.contractService.streamContract(id);
    res.setHeader('Content-Type', record.mimeType ?? 'application/pdf');
    res.setHeader('Content-Disposition', `attachment; filename="${record.name}"`);
    stream.pipe(res);
  }

  @Post(':id/contract/sign')
  @PortalCustomer()
  @ApiOperation({ summary: 'Customer agrees and signs the LM contract — then the advance invoice is issued' })
  signContract(
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: SignLastMileContractDto,
    @CurrentUser() user: TCurrentUser,
  ) {
    return this.contractService.sign(id, dto, user?.id ?? null);
  }

  // Customer-facing like :id/contract/view — the portal's confirm page opens
  // this straight from the departure notification link before the customer
  // has done anything else, so it can't be staff-only. Service ownership-
  // checks against the resolved company; staff may also open it.
  @Get(':id')
  @MixedAudience(FREIGHT_PERMS.lastMile.requestView)
  @ApiOperation({ summary: 'Get a last-mile confirmation request by ID' })
  findOne(@Param('id', ParseUUIDPipe) id: string, @CurrentUser() user: TCurrentUser) {
    return this.requestsService.findById(id, user?.id ?? null);
  }

  // No @BookingStaff — the customer (portal) fills this, not backoffice staff.
  // TODO: integrate @edr/auth — @CurrentUser is a stub until then; the service
  // still cross-checks the request's booking against the resolved company.
  @Post(':id/submit')
  @PortalCustomer()
  @ApiOperation({ summary: "Customer confirms which containers go via EDR last-mile" })
  submit(
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: SubmitLastMileRequestDto,
    @CurrentUser() user: TCurrentUser,
  ) {
    return this.requestsService.submit(id, user?.id ?? null, dto.containerNumbers, dto.deliveryDate);
  }

  @Post(':id/approve')
  @BookingStaff(FREIGHT_PERMS.lastMile.requestApprove)
  @ApiOperation({ summary: 'Truck & Machinery chief approves the request — the advance defaults to the live last-mile rate; LM contract becomes signable and the advance invoice follows the customer signature' })
  approve(
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: ApproveLastMileRequestDto,
    @CurrentUser() user: TCurrentUser,
  ) {
    return this.requestsService.approve(id, user?.id ?? null, dto.advanceAmount);
  }

  @Post(':id/reject')
  @BookingStaff(FREIGHT_PERMS.lastMile.requestApprove)
  @ApiOperation({ summary: 'Truck & Machinery chief rejects the request with a reason' })
  reject(
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: RejectLastMileRequestDto,
    @CurrentUser() user: TCurrentUser,
  ) {
    return this.requestsService.reject(id, user?.id ?? null, dto.reason);
  }
}