import {
  Body,
  Controller,
  Get,
  Post,
  Query,
  Req,
  UseGuards,
} from '@nestjs/common';
import { ApiBearerAuth, ApiOkResponse, ApiTags } from '@nestjs/swagger';
import { UserRole } from '@prisma/client';
import { JwtAuthGuard } from '../../common/guards/jwt-auth.guard';
import { RolesGuard } from '../../common/guards/roles.guard';
import { Roles } from '../../common/decorators/roles.decorator';
import { Permissions } from '../../common/decorators/permissions.decorator';
import { PermissionsGuard } from '../../common/guards/permissions.guard';
import { RegisterSaleDto } from './dto/register-sale.dto';
import { SalesService } from './sales.service';

type RequestWithUser = {
  user: { id: string; role: UserRole; shopId: string | null };
};

@ApiTags('sales')
@ApiBearerAuth()
@Controller('sales')
@UseGuards(JwtAuthGuard, RolesGuard, PermissionsGuard)
@Roles(UserRole.SUPERADMIN, UserRole.ADMIN, UserRole.SUBADMIN)
@Permissions('sales')
export class SalesController {
  constructor(private readonly sales: SalesService) {}

  @Get()
  @ApiOkResponse({
    description: 'List sales for current shop (or shopId for SUPERADMIN)',
  })
  list(@Req() req: RequestWithUser, @Query('shopId') shopId?: string) {
    return this.sales.list(req.user, shopId);
  }

  @Get('paged')
  @ApiOkResponse({
    description: 'Paginated list of sales (current shop; optional filters)',
  })
  listPaged(
    @Req() req: RequestWithUser,
    @Query('page') page?: string,
    @Query('limit') limit?: string,
    @Query('q') q?: string,
    @Query('customerId') customerId?: string,
    @Query('status') status?: string,
    @Query('from') from?: string,
    @Query('to') to?: string,
    @Query('minAmount') minAmount?: string,
    @Query('maxAmount') maxAmount?: string,
    @Query('shopId') shopId?: string,
  ) {
    const p = page != null ? Number(page) : null;
    const l = limit != null ? Number(limit) : null;
    const wantsPaged =
      (p != null && Number.isFinite(p)) || (l != null && Number.isFinite(l));
    const pageNum =
      p != null && Number.isFinite(p) ? Math.max(1, Math.floor(p)) : 1;
    const limitNum =
      l != null && Number.isFinite(l)
        ? Math.min(100, Math.max(1, Math.floor(l)))
        : 20;

    return this.sales.listPaged(req.user, {
      page: wantsPaged ? pageNum : 1,
      limit: wantsPaged ? limitNum : 20,
      q: (q ?? '').toString(),
      customerId: customerId?.toString(),
      status: status?.toString(),
      from: from?.toString(),
      to: to?.toString(),
      minAmount: minAmount?.toString(),
      maxAmount: maxAmount?.toString(),
      shopId: shopId?.toString(),
    });
  }

  @Post('register')
  @ApiOkResponse({ description: 'Register a sale (creates customer if new)' })
  register(@Req() req: RequestWithUser, @Body() dto: RegisterSaleDto) {
    return this.sales.register(req.user, dto);
  }
}