using System;

using System.Collections.Generic;

using System.Net.Http;

using System.Text.Json;

using System.Text.Json.Serialization;

using System.Threading.Tasks;

using Polly;

using Polly.Retry;

​

public class Product

{

    [JsonPropertyName("id")]

    public int Id { get; set; }

​

    [JsonPropertyName("title")]

    public string Title { get; set; }

​

    [JsonPropertyName("price")]

    public double Price { get; set; }

​

    [JsonPropertyName("description")]

    public string Description { get; set; }

​

    [JsonPropertyName("category")]

    public string Category { get; set; }

​

    [JsonPropertyName("image")]

    public string Image { get; set; }

​

    [JsonPropertyName("rating")]

    public Rating Rating { get; set; }

}

​

public class Rating

{

    [JsonPropertyName("rate")]

    public double Rate { get; set; }

    [JsonPropertyName("count")]

    public int Count { get; set; }

}

​

public class Program

{

      private static readonly AsyncRetryPolicy<HttpResponseMessage> retryPolicy = Policy

        .HandleResult<HttpResponseMessage>(r => !r.IsSuccessStatusCode)

        .WaitAndRetryAsync(3, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)), 

            (result, timeSpan, retryCount, context) =>

            {

                Console.WriteLine($"Retry {retryCount} due to: {result.Result?.StatusCode}. Waiting {timeSpan.TotalSeconds} seconds...");

            });

    public static async Task Main()

    {

        var httpClient = new HttpClient();

        string url = "https://fakestoreapi.com/products";

​

        try

        {

            // Fetch JSON response

            var response = await httpClient.GetStringAsync(url);

            Console.WriteLine(response);

            // Deserialize the JSON into a list of Product objects

            var products = JsonSerializer.Deserialize<List<Product>>(response);

            if (products != null)

            {

                // Convert the products list back to a JSON string and print it

                string jsonString = JsonSerializer.Serialize(products, new JsonSerializerOptions { WriteIndented = true });

                Console.WriteLine(jsonString);

            }

            // another print out

            // if (products != null)

            // {

                // // Loop through and display each product

                // foreach (var product in products)

                // {

                    // Console.WriteLine($"ID: {product.Id}");

                    // Console.WriteLine($"Title: {product.Title}");

                    // Console.WriteLine($"Price: ${product.Price}");

                    // Console.WriteLine($"Description: {product.Description}");

                    // Console.WriteLine($"Category: {product.Category}");

                    // Console.WriteLine($"Image: {product.Image}");

                    // Console.WriteLine($"Rating: {product.Rating.Rate} (based on {product.Rating.Count} reviews)");

                    // Console.WriteLine("--------------------------------------------------------");

                // }

            // }

        }

        catch (Exception ex)

        {

            Console.WriteLine($"Error occurred: {ex.Message}");

        }

        Console.WriteLine("*********************************");

        Console.WriteLine("Using Retry policy");

        Console.WriteLine("*********************************");

        try

        {

            // Apply Polly retry policy on the HTTP request

            var response = await retryPolicy.ExecuteAsync(async () => 

                await httpClient.GetAsync(url));

​

            // Ensure the response is successful

            response.EnsureSuccessStatusCode();

​

            // Fetch the response content

            var responseContent = await response.Content.ReadAsStringAsync();

            Console.WriteLine(responseContent);

​

            // Deserialize the JSON into a list of Product objects

            var products = JsonSerializer.Deserialize<List<Product>>(responseContent);

​

            if (products != null)

            {

                // Convert the products list back to a JSON string and print it

                string jsonString = JsonSerializer.Serialize(products, new JsonSerializerOptions { WriteIndented = true });

                Console.WriteLine(jsonString);

            }

        }

        catch (Exception ex)

        {

            Console.WriteLine($"Error occurred: {ex.Message}");

        }

    }

}

​