import 'dart:async';

import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:niogu_ecommerce_v1/features/cart/domain/entities/cart.dart';
import 'package:niogu_ecommerce_v1/features/cart/presentation/providers/cart_provider.dart';
import 'package:niogu_ecommerce_v1/features/home/domain/entities/home.dart';

class CartItemsController extends StateNotifier<Map<String, CartItem>> {
  CartItemsController() : super({});

  void hydrate(List<CartItem> cartItems) {
    state = {
      ...state,
      for (final cartItem in cartItems)
        "${cartItem.outletId}-${cartItem.id}": cartItem,
    };
  }

  void increment(CartItem item, {int? quantity}) {
    final key = "${item.outletId}-${item.id}";
    final cartItem = state[key];

    if (cartItem == null) {
      state = {...state, key: item};
    } else {
      state = {
        ...state,
        key: item.copyWith(quantity: cartItem.quantity + (quantity ?? 1)),
      };
    }
  }

  void decrement(String outletId, String id) {
    final key = "$outletId-$id";

    final cartItem = state[key];

    if (cartItem == null) return;

    if (cartItem.quantity <= 1) {
      state = {...state}..remove(key);
    } else {
      state = {
        ...state,
        key: cartItem.copyWith(quantity: cartItem.quantity - 1),
      };
    }
  }

  void clear() {
    state = {};
  }
}

class ProductBestSellerController
    extends AutoDisposeAsyncNotifier<List<ProductItem>> {
  @override
  FutureOr<List<ProductItem>> build() => _fetchProductBestSellers();

  Future<List<ProductItem>> _fetchProductBestSellers() async {
    final cartRepository = ref.read(cartRepositoryProvider);

    return await cartRepository.fetchProductBestSellers();
  }

  Future<void> refresh() async {
    ref.invalidateSelf();

    await future;
  }
}