import { Controller, Get, Post, Patch, Delete, Param, Body, UsePipes, ValidationPipe, Query, ParseUUIDPipe, HttpCode, HttpStatus,} from '@nestjs/common';
import { QuestionService } from './question.service';
import { CreateQuestionDto } from './dto/create-question.dto';
import { UpdateQuestionDto } from './dto/update-question.dto';
import { Question } from './entity/question.entity';

@Controller('question')
export class QuestionController {
  constructor(private readonly questionService: QuestionService) {}

  @Post('create')
  @UsePipes(new ValidationPipe({ transform: true, whitelist: true }))
  async create(@Body() body: CreateQuestionDto): Promise<Question> {
    return this.questionService.create(body);
  }

  @Get('findAll')
  async findAll(
    @Query('page') page: string = '1',
    @Query('limit') limit: string = '10',
  ) {
    // The service returns the full pagination object
    return this.questionService.findAll(parseInt(page, 10), parseInt(limit, 10));
  }

  @Get(':id')
  async findOne(
    @Param('id', new ParseUUIDPipe()) id: string,
  ): Promise<Question | null> {
    return this.questionService.findById(id);
  }

  @Patch(':id')
  @UsePipes(new ValidationPipe({ transform: true, whitelist: true }))
  async update(
    @Param('id', new ParseUUIDPipe()) id: string,
    @Body() body: UpdateQuestionDto,
  ): Promise<Question | null> {
    return this.questionService.update(id, body);
  }

  @Delete(':id')
  @HttpCode(HttpStatus.NO_CONTENT)
  async remove(@Param('id', new ParseUUIDPipe()) id: string): Promise<void> {
    return this.questionService.remove(id);
  }
}