using System;

using System.Text.Json;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        InterviewTest test = new InterviewTest();

        test.Test();

    }

    internal class InterviewTest

    {

        private const string ErrorsInput = @"

        [

          {

            ""ID"": 1,

            ""Message"": ""Error message one"",

            ""Details"": [

              {

                ""Date"": ""2023-08-03T00:00:00"",

                ""ShortMessage"": ""Short one"",

                ""SeverityLevel"": 4

              }

            ]

          },

          {

            ""ID"": 2,

            ""Message"": ""Error message two"",

            ""Details"": [

              {

                ""Date"": ""2023-08-04T00:00:00"",

                ""ShortMessage"": ""Short two"",

                ""SeverityLevel"": 1

              }

            ]

          },

          {

            ""ID"": 3,

            ""Message"": ""Error message three"",

            ""Details"": [

              {

                ""Date"": ""2023-08-05T00:00:00"",

                ""ShortMessage"": ""Short three"",

                ""SeverityLevel"": 2

              }

            ]

          },

          {

            ""ID"": 4,

            ""Message"": ""Error message four"",

            ""Details"": [

              {

                ""Date"": ""2023-08-06T00:00:00"",

                ""ShortMessage"": ""Short four"",

                ""SeverityLevel"": 3

              }

            ]

          }

        ]

        ";

​

        private const string CustomerErrorsInput = @"

        [

          {

            ""CustomerId"": 19,

            ""CustomerName"": ""Bob"",

            ""ErrorIds"": [1,2]

          },

          {

            ""CustomerId"": 12,

            ""CustomerName"": ""Jeff"",

            ""ErrorIds"": [1,2,3]

          },

          {

            ""CustomerId"": 15,

            ""CustomerName"": ""George"",

            ""ErrorIds"": [1,2,4]

          },

          {

            ""CustomerId"": 15,

            ""CustomerName"": ""George"",

            ""ErrorIds"": null

          }

        ]

        ";

​

        public class Error

        {

            public int ID { get; set; }

            public string Message { get; set; }

​

            public List<ErrorDetail> Details { get; set; }

        }

​

        public class ErrorDetail

        {

            public DateTime Date { get; set; }

            public string ShortMessage { get; set; }

​

            //higher is worse

            public int SeverityLevel { get; set; }

        }

​

        public class ClientSupportTicket

        {

            public int CustomerId { get; set; }

            public string CustomerName { get; set; }

​

            public List<int> ErrorIds { get; set; }

        }

​

        public void Test()

        {

            List<Error> errors = JsonSerializer.Deserialize<List<Error>>(ErrorsInput);

            List<ClientSupportTicket> supportTickets = JsonSerializer.Deserialize<List<ClientSupportTicket>>(CustomerErrorsInput);

            Console.WriteLine($"Number of errors: {errors.Count}");

            Console.WriteLine($"Number of tickets: {supportTickets.Count}");

​

            int customerIdWithMostErrors = CustomerWithMostErrors(errors, supportTickets);

            int customeridWithMostRecentError = CustomerWithMostRecentError(errors, supportTickets);

            int customerWithMostSevereError = CustomerWithMostSevereError(errors, supportTickets);

            int customerWithHighestSeverityError = CustomerWithHighestAverageSeverity(errors, supportTickets);

​

            Console.WriteLine($"Customer with most errors: {customerIdWithMostErrors}");

            Console.WriteLine($"Customer with most recent error: {customeridWithMostRecentError}");

            Console.WriteLine($"Customer with most severe error: {customerWithMostSevereError}");

            Console.WriteLine($"Customer with most highest average severity: {customerWithHighestSeverityError}");

        }

​

        //return the customer Id with the most errors

        public int CustomerWithMostErrors(List<Error> errors, List<ClientSupportTicket> supportTickets)

        {

            return 0;

        }

​

        public int CustomerWithMostRecentError(List<Error> errors, List<ClientSupportTicket> supportTickets)

        {

            return 0;

        }

​

        public int CustomerWithMostSevereError(List<Error> errors, List<ClientSupportTicket> supportTickets)

        {

            return 0;

        }

​

        public int CustomerWithHighestAverageSeverity(List<Error> errors, List<ClientSupportTicket> supportTickets)

        {

            return 0;

        }

    }

}