products.controller.ts

import {
  Controller,
  Get,
  Post,
  Put,
  Delete,
  Body,
  Param,
  Query,
  HttpCode,
  HttpStatus,
  UseInterceptors,
  CacheInterceptor,
  CacheKey,
  CacheTTL,
} from '@nestjs/common';
import { ProductsService } from './products.service';
import { CreateProductDto } from './dto/create-product.dto';
import { ApiTags, ApiOperation, ApiResponse, ApiQuery } from '@nestjs/swagger';
import { CurrentUser } from '../common/decorators/current-user.decorator';

@ApiTags('Products')
@Controller('products')
export class ProductsController {
  constructor(private readonly productsService: ProductsService) {}

  @Get()
  @UseInterceptors(CacheInterceptor)
  @CacheKey('products:all')
  @CacheTTL(300)
  @ApiOperation({ summary: 'Get all products' })
  @ApiQuery({ name: 'category', required: false, description: 'Filter by category' })
  @ApiResponse({ status: 200, description: 'List of products' })
  async findAll(@Query('category') category?: string) {
    if (category) {
      return this.productsService.findByCategory(category);
    }
    return this.productsService.findAll();
  }

  @Get(':id')
  @UseInterceptors(CacheInterceptor)
  @CacheKey('products')
  @CacheTTL(300)
  @ApiOperation({ summary: 'Get a product by ID' })
  @ApiResponse({ status: 200, description: 'Product details' })
  @ApiResponse({ status: 404, description: 'Product not found' })
  findOne(@Param('id') id: string) {
    return this.productsService.findOne(id);
  }

  @Post()
  @HttpCode(HttpStatus.CREATED)
  @ApiOperation({ summary: 'Create a new product' })
  @ApiResponse({ status: 201, description: 'Product created' })
  @ApiResponse({ status: 400, description: 'Validation error' })
  @ApiResponse({ status: 409, description: 'Product already exists' })
  create(@Body() createProductDto: CreateProductDto, @CurrentUser() user: any) {
    return {
      message: 'Product created successfully',
      data: this.productsService.create(createProductDto),
      createdBy: user?.email || 'system',
    };
  }

  @Put(':id')
  @ApiOperation({ summary: 'Update a product' })
  @ApiResponse({ status: 200, description: 'Product updated' })
  @ApiResponse({ status: 404, description: 'Product not found' })
  update(
    @Param('id') id: string,
    @Body() updateProductDto: Partial<CreateProductDto>,
  ) {
    return {
      message: 'Product updated successfully',
      data: this.productsService.update(id, updateProductDto),
    };
  }

  @Delete(':id')
  @HttpCode(HttpStatus.NO_CONTENT)
  @ApiOperation({ summary: 'Delete a product' })
  @ApiResponse({ status: 204, description: 'Product deleted' })
  @ApiResponse({ status: 404, description: 'Product not found' })
  async remove(@Param('id') id: string) {
    await this.productsService.remove(id);
    return {
      message: 'Product deleted successfully',
    };
  }
}