import { Controller, Get, Post, Body, Patch, Delete, UseGuards, Param } from '@nestjs/common';
import { CartService } from '../providers/cart.service';
import { BulkAddItemsToCartDto } from '../dto/bulk-add-items.dto';
import { ApplyCouponDto } from '../dto/apply-coupon.dto';
import { ApiTags, ApiOperation, ApiBearerAuth, ApiBody, ApiParam, ApiHeader } from '@nestjs/swagger';
import { AuthGuard } from '../../auth/guards/auth.guard';
import { UserId } from 'src/common/decorators/user-id.decorator';
import { RestId } from 'src/common/decorators/rest-id.decorator';
import { SetAllCartParmsDto } from '../dto/set-all-cart-params.dto';
import { API_HEADER_SLUG } from 'src/common/constants/index';

@UseGuards(AuthGuard)
@ApiBearerAuth()
@ApiTags('cart')
@Controller('public/cart')
export class CartController {
  constructor(private readonly cartService: CartService) {}

  @Get()
  @ApiOperation({ summary: 'Get cart for current user and restaurant' })
  @ApiHeader(API_HEADER_SLUG)
  async findOne(@UserId() userId: string, @RestId() restaurantId: string) {
    return this.cartService.getOrCreateCart(userId, restaurantId);
  }

  @Post('items/:foodId/increment')
  @ApiOperation({ summary: 'Increment item quantity in cart by 1' })
  @ApiHeader(API_HEADER_SLUG)
  @ApiParam({ name: 'foodId', description: 'Food ID to increment in cart' })
  async incrementItem(@UserId() userId: string, @RestId() restaurantId: string, @Param('foodId') foodId: string) {
    return this.cartService.incrementItem(userId, restaurantId, foodId, 1);
  }

  @Post('items/:foodId/decrement')
  @ApiOperation({ summary: 'Decrement item quantity in cart by 1 (removes item if quantity reaches 0)' })
  @ApiHeader(API_HEADER_SLUG)
  @ApiParam({ name: 'foodId', description: 'Food ID to decrement in cart' })
  async decrementItem(@UserId() userId: string, @RestId() restaurantId: string, @Param('foodId') foodId: string) {
    return this.cartService.decrementItem(userId, restaurantId, foodId);
  }

  @Post('items/bulk')
  @ApiOperation({ summary: 'Bulk add items to cart (increments quantity if items exist)' })
  @ApiHeader(API_HEADER_SLUG)
  @ApiBody({ type: BulkAddItemsToCartDto })
  bulkAddItems(
    @UserId() userId: string,
    @RestId() restaurantId: string,
    @Body() bulkAddItemsDto: BulkAddItemsToCartDto,
  ) {
    return this.cartService.bulkAddItems(userId, restaurantId, bulkAddItemsDto);
  }

  @Delete('items/:foodId')
  @ApiOperation({ summary: 'Remove item from cart' })
  @ApiHeader(API_HEADER_SLUG)
  @ApiParam({ name: 'foodId', description: 'Food ID in the cart' })
  async removeItem(@UserId() userId: string, @RestId() restaurantId: string, @Param('foodId') foodId: string) {
    return this.cartService.removeItem(userId, restaurantId, foodId);
  }

  @Delete()
  @ApiOperation({ summary: 'Clear entire cart' })
  @ApiHeader(API_HEADER_SLUG)
  async clearCart(@UserId() userId: string, @RestId() restaurantId: string) {
    return this.cartService.clearCart(userId, restaurantId);
  }

  @Post('apply-coupon')
  @ApiOperation({ summary: 'Apply coupon to cart' })
  @ApiHeader(API_HEADER_SLUG)
  @ApiBody({ type: ApplyCouponDto })
  async applyCoupon(@UserId() userId: string, @RestId() restaurantId: string, @Body() applyCouponDto: ApplyCouponDto) {
    return this.cartService.applyCoupon(userId, restaurantId, applyCouponDto);
  }

  @Delete('coupon')
  @ApiOperation({ summary: 'Remove coupon from cart' })
  @ApiHeader(API_HEADER_SLUG)
  async removeCoupon(@UserId() userId: string, @RestId() restaurantId: string) {
    return this.cartService.removeCoupon(userId, restaurantId);
  }


  @Patch('all')
  @ApiOperation({ summary: 'Set all cart params' })
  @ApiHeader(API_HEADER_SLUG)
  @ApiBody({ type: SetAllCartParmsDto })
  setAllCartParams(@UserId() userId: string, @RestId() restaurantId: string, @Body() dto: SetAllCartParmsDto) {
    return this.cartService.setAllCartParams(userId, restaurantId, dto);
  }
}
