import { Controller, Get, Query } from '@nestjs/common';
import {
  ApiBearerAuth,
  ApiOkResponse,
  ApiOperation,
  ApiTags,
} from '@nestjs/swagger';
import { CurrentUser } from '@edr/api-common';
import type { TCurrentUser } from '@tria-plc/api-common/modules/auth/types/current-user.type';

import { BookingStaff } from '../../common/booking-guards';
import { hasFreightPermission } from '../../common/freight-permission.util';
import {
  FREIGHT_PERMS,
  OVERVIEW_LAYOUT_KEYS,
  OVERVIEW_LAYOUT_LABELS,
} from '../../seed/freight-permissions.registry';
import { OverviewLayoutDto } from './dto/overview-layout.dto';
import { OverviewQueryDto } from './dto/overview-query.dto';
import { OverviewResponseDto } from './dto/overview-response.dto';
import {
  OverviewBillingTabDto,
  OverviewBookingsTabDto,
  OverviewClearanceTabDto,
  OverviewContractsTabDto,
  OverviewCustomersTabDto,
  OverviewFleetTabDto,
  OverviewOperationsTabDto,
  OverviewStaffTabDto,
} from './dto/overview-tab-response.dto';
import { OverviewService } from './overview.service';
import { UserTradeAccessService } from '../user-trade-access/user-trade-access.service';

@ApiTags('Overview')
@ApiBearerAuth()
@Controller('overview')
export class OverviewController {
  constructor(
    private readonly overviewService: OverviewService,
    private readonly userTradeAccessService: UserTradeAccessService,
  ) {}

  /**
   * Layouts the caller has permission to render, in priority order — exactly
   * the same "server filters by permission, frontend just renders what comes
   * back" shape as GET /reports. A caller lands on exactly one layout, so the
   * frontend picks the first entry here rather than rendering the whole list.
   */
  @Get('layouts')
  @BookingStaff(FREIGHT_PERMS.overview.view)
  @ApiOperation({ summary: 'Overview dashboard layouts the caller has permission to render' })
  @ApiOkResponse({ type: OverviewLayoutDto, isArray: true })
  getLayouts(@CurrentUser() user: TCurrentUser): OverviewLayoutDto[] {
    return OVERVIEW_LAYOUT_KEYS.filter((key) =>
      hasFreightPermission(user, FREIGHT_PERMS.overview.layout(key)),
    ).map((key) => ({ key, label: OVERVIEW_LAYOUT_LABELS[key] }));
  }

  @Get()
  @BookingStaff(FREIGHT_PERMS.overview.view)
  @ApiOperation({ summary: 'Aggregated dashboard summary for backoffice overview' })
  @ApiOkResponse({ type: OverviewResponseDto })
  async getDashboard(
    @Query() query: OverviewQueryDto,
    @CurrentUser() user: TCurrentUser,
  ): Promise<OverviewResponseDto> {
    const allowed =
      await this.userTradeAccessService.resolveAllowedDirections(user);
    return this.overviewService.getDashboard(
      query.range ?? '30d',
      allowed ?? undefined,
    );
  }

  @Get('bookings')
  @BookingStaff(FREIGHT_PERMS.overview.view)
  @ApiOperation({ summary: 'Bookings tab metrics and charts' })
  @ApiOkResponse({ type: OverviewBookingsTabDto })
  async getBookingsTab(
    @Query() query: OverviewQueryDto,
    @CurrentUser() user: TCurrentUser,
  ): Promise<OverviewBookingsTabDto> {
    const allowed =
      await this.userTradeAccessService.resolveAllowedDirections(user);
    return this.overviewService.getBookingsTab(
      query.range ?? '30d',
      allowed ?? undefined,
    );
  }

  @Get('contracts')
  @BookingStaff(FREIGHT_PERMS.overview.view)
  @ApiOperation({ summary: 'Contracts tab metrics and charts' })
  @ApiOkResponse({ type: OverviewContractsTabDto })
  async getContractsTab(
    @Query() query: OverviewQueryDto,
    @CurrentUser() user: TCurrentUser,
  ): Promise<OverviewContractsTabDto> {
    const allowed =
      await this.userTradeAccessService.resolveAllowedDirections(user);
    return this.overviewService.getContractsTab(
      query.range ?? '30d',
      allowed ?? undefined,
    );
  }

  @Get('billing')
  @BookingStaff(FREIGHT_PERMS.overview.view)
  @ApiOperation({ summary: 'Billing tab metrics and charts' })
  @ApiOkResponse({ type: OverviewBillingTabDto })
  async getBillingTab(
    @Query() query: OverviewQueryDto,
    @CurrentUser() user: TCurrentUser,
  ): Promise<OverviewBillingTabDto> {
    const allowed =
      await this.userTradeAccessService.resolveAllowedDirections(user);
    return this.overviewService.getBillingTab(
      query.range ?? '30d',
      allowed ?? undefined,
    );
  }

  @Get('operations')
  @BookingStaff(FREIGHT_PERMS.overview.view)
  @ApiOperation({ summary: 'Operations tab metrics and charts' })
  @ApiOkResponse({ type: OverviewOperationsTabDto })
  getOperationsTab(
    @Query() query: OverviewQueryDto,
  ): Promise<OverviewOperationsTabDto> {
    return this.overviewService.getOperationsTab(query.range ?? '30d');
  }

  @Get('fleet')
  @BookingStaff(FREIGHT_PERMS.overview.view)
  @ApiOperation({ summary: 'Wagon and locomotive fleet detail, plus turnaround' })
  @ApiOkResponse({ type: OverviewFleetTabDto })
  getFleetTab(@Query() query: OverviewQueryDto): Promise<OverviewFleetTabDto> {
    return this.overviewService.getFleetTab(query.range ?? '30d');
  }

  @Get('clearance')
  @BookingStaff(FREIGHT_PERMS.overview.view)
  @ApiOperation({ summary: 'Document review and invoice queues' })
  @ApiOkResponse({ type: OverviewClearanceTabDto })
  getClearanceTab(): Promise<OverviewClearanceTabDto> {
    return this.overviewService.getClearanceTab();
  }

  @Get('customers')
  @BookingStaff(FREIGHT_PERMS.overview.view)
  @ApiOperation({ summary: 'Customers tab metrics and charts' })
  @ApiOkResponse({ type: OverviewCustomersTabDto })
  async getCustomersTab(
    @Query() query: OverviewQueryDto,
    @CurrentUser() user: TCurrentUser,
  ): Promise<OverviewCustomersTabDto> {
    const allowed =
      await this.userTradeAccessService.resolveAllowedDirections(user);
    return this.overviewService.getCustomersTab(
      query.range ?? '30d',
      allowed ?? undefined,
    );
  }

  @Get('staff')
  @BookingStaff(FREIGHT_PERMS.overview.view)
  @ApiOperation({ summary: 'Staff tab metrics and charts' })
  @ApiOkResponse({ type: OverviewStaffTabDto })
  getStaffTab(@Query() query: OverviewQueryDto): Promise<OverviewStaffTabDto> {
    return this.overviewService.getStaffTab(query.range ?? '30d');
  }
}