/*

Instructions:

You are given a list of products, each with the following properties: Id, Name, Category, and Price. Your task is to perform various operations using this list to extract and manipulate data. Please implement the methods below:

​

GetCategoriesWithMostExpensiveProduct: Return a list of categories containing the most expensive product in each category.

GetProductsAboveAveragePrice: Return a list of products that have a price above the average price of all products.

GetCategoryPriceStats: Return a dictionary where the keys are category names and the values are tuples containing the minimum and maximum price in that category.

GetProductNamesInDistinctCategories: Return a list of product names belonging to distinct categories (no duplicate categories).

GetProductCountByCategory: Return a dictionary where the keys are category names and the values are the count of products in each category.

*/

​

using System;

using System.Collections.Generic;

using System.Linq;

​

namespace ProductManagement

{

    public class Product

    {

        public int Id { get; set; }

        public string Name { get; set; }

        public string Category { get; set; }

        public decimal Price { get; set; }

    }

​

    public class ProductOperations

    {

        public List<Product> Products { get; set; }

​

        public ProductOperations(List<Product> products)

        {

            Products = products;

        }

​

        public List<string> GetCategoriesWithMostExpensiveProduct()

        {

            throw new NotImplementedException();

        }

​

        public List<Product> GetProductsAboveAveragePrice()

        {

            throw new NotImplementedException();

        }

​

        public Dictionary<string, (decimal MinPrice, decimal MaxPrice)> GetCategoryPriceStats()

        {

            throw new NotImplementedException();

        }

​

        public List<string> GetProductNamesInDistinctCategories()

        {

            throw new NotImplementedException();

        }

​

        public Dictionary<string, int> GetProductCountByCategory()

        {

            throw new NotImplementedException();

        }

    }

​

    class Program

    {

        static void Main(string[] args)

        {

            List<Product> products = new List<Product>

            {

                new Product { Id = 1, Name = "Laptop", Category = "Electronics", Price = 1200 },

                new Product { Id = 2, Name = "Smartphone", Category = "Electronics", Price = 800 },

                new Product { Id = 3, Name = "Tablet", Category = "Electronics", Price = 600 },

                new Product { Id = 4, Name = "Headphones", Category = "Accessories", Price = 150 },

                new Product { Id = 5, Name = "Charger", Category = "Accessories", Price = 50 },

                new Product { Id = 6, Name = "Desk", Category = "Furniture", Price = 300 },

                new Product { Id = 7, Name = "Chair", Category = "Furniture", Price = 200 },

            };

​

            ProductOperations productOperations = new ProductOperations(products);

​

            // Example calls to the methods (these lines can be commented out or removed in the final exercise)

            var mostExpensiveCategories = productOperations.GetCategoriesWithMostExpensiveProduct();

            var productsAboveAveragePrice = productOperations.GetProductsAboveAveragePrice();

            var categoryPriceStats = productOperations.GetCategoryPriceStats();

            var distinctCategoryProductNames = productOperations.GetProductNamesInDistinctCategories();

            var productCountByCategory = productOperations.GetProductCountByCategory();

            // Print the results

            Console.WriteLine("Categories with the most expensive product:");

            mostExpensiveCategories.ForEach(Console.WriteLine);

​

            Console.WriteLine("\nProducts with price above average:");

            productsAboveAveragePrice.ForEach(p => Console.WriteLine(p.Name));

​

            Console.WriteLine("\nCategory price stats:");

            foreach (var stat in categoryPriceStats)

            {

                Console.WriteLine($"{stat.Key}: MinPrice = {stat.Value.MinPrice}, MaxPrice = {stat.Value.MaxPrice}");

            }

​

            Console.WriteLine("\nProduct names in distinct categories:");

            distinctCategoryProductNames.ForEach(Console.WriteLine);

​

            Console.WriteLine("\nProduct count by category:");

            foreach (var count in productCountByCategory)

            {

                Console.WriteLine($"{count.Key}: {count.Value}");

            }

        }

    }

}

​